Facility that uses tap water in building

Abstract

To provide a facility using tap water in a building, with which it is possible to efficiently inhibit the proliferation of chlorine-resistant Methylobacteria or viruses or to effectively sterilize or inactivate chlorine-resistant Methylobacteria or viruses that have proliferated.SOLUTION: First modified water and second modified water are discharged simultaneously. When in a mixed state, the first modified water and the second modified water are generated so as to have a composition selected from the following A, B, C, or D: A: containing 0.05 ppm or more of ozone and 1.5 ppm or more of free chlorine, B: containing 0.1 ppm or more of ozone and more than 0.75 ppm of free chlorine, C: containing 0.2 ppm or more of ozone and 0.1 ppm or more of free chlorine, D: containing 0.5 ppm or more of free chlorine and more than 15 ppm of hydrogen peroxide.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to facilities in buildings where tap water is used. More specifically, the present invention relates to facilities that utilize modified water obtained by modifying tap water that has been chlorinated at a water purification plant, thereby enabling the maintenance of a hygienic living environment in which tap water is used for toilets, bathrooms, kitchens, washbasins, etc. [Background technology]

[0002] As an increasing number of consumers seek clean and comfortable living environments, there is a demand for technologies that can maintain hygienic living environments. In particular, areas where water is used, such as toilets, bathrooms, kitchens, and washbasins, are prone to the proliferation of bacteria and mold and the attachment of viruses, and regular cleaning is required to maintain hygienic conditions in these areas. For this reason, cleaning with detergents or the like has traditionally been required, which is time-consuming. Furthermore, detergents can pose problems in terms of their impact on the environment and safety.

[0003] As a way to sterilize areas where tap water is used while reducing the labor and problems described above, a technology using electrolyzed water obtained by electrolyzing tap water has been proposed. For example, Japanese Patent Laid-Open Publication No. 10-306484 (Patent Document 1) discloses that water containing free chlorine (paragraph 0023) or ozone (paragraph 0025) obtained by electrolyzing tap water is poured into a toilet bowl to sterilize urease-producing bacteria and suppress the production of ammonia and the deposition of urinary stones. Patent Document 1 states, "The toilet flushing device described above is provided with an electrolysis tank 181 that produces water containing free chlorine. However, this may be replaced with a device that produces water containing ozone." (Paragraph 0402). Furthermore, in the "Examples," the bactericidal power of electrolyzed water containing either free chlorine or ozone is evaluated, suggesting that electrolyzed water containing both free chlorine and ozone is not considered.

[0004] Furthermore, Japanese Patent Laid-Open Publication No. 2008-073604 (Patent Document 2) proposes a small spray device that uses a membrane-electrode assembly in which a strip-shaped diaphragm is coated around a rod-shaped or cylindrical electrode and a counter electrode is placed on the surface of the diaphragm to electrolyze water containing salt or the like, generate sterilizing species such as ozone and free chlorine under conditions in which their concentrations are controlled, and spray the resulting electrolyzed water in the form of a mist. Specifically, it describes electrolyzing tap water containing salt to generate electrolyzed water containing 3 ppm ozone and 0.5 ppm hypochlorous acid (Example 2) and electrolyzed water containing 0.1 ppm or less ozone and 10 ppm hypochlorous acid (Example 3). While the device proposed in Patent Document 2 does not require detergent for cleaning or sterilizing objects, it requires the addition of salt or the like to the raw water each time, which is time-consuming.

[0005] In addition, Japanese Patent Application Laid-Open No. 2008-168002 (Patent Document 3) proposes a bathroom cleaning device in which an electrolysis cell having at least a pair of electrodes, a flow path formed between the electrodes, and a liquid inlet and a liquid outlet communicating with the flow path is installed below the bathroom counter, and tap water containing chloride ions is electrolyzed in the electrolysis cell while being passed through, thereby generating free chlorine, and the water containing the generated free chlorine is then discharged into the washing area. According to the bathroom cleaning device described in Patent Document 3, if the electrolysis tank is turned on, the chlorine-containing tap water supplied from the water supply pipe is decomposed and free chlorine is supplied to the bathroom, so the bathroom can be cleaned without the hassle of adding salt. However, the present inventors have discovered that even with the device proposed in Patent Document 3, pink stains may remain in areas where water is used, such as toilets, bathrooms, kitchens, and washbasins. Furthermore, they have discovered that the cause of this is chlorine-resistant Methylobacterium brought in by tap water from water purification plants.

[0006] The literature "Chlorine resistance mechanism of Protomonas extorquens frequently isolated from drinking tank water [author: Katsunori Furuhata], Society of Antibacterial and Antifungal Agents, Vol. 19, No. 8, pp. 395-399, 1991" (Non-patent Document 1) describes the mechanism of chlorine resistance of Protomonas extorquens, which is frequently isolated from drinking tank water. Protomonas extorquens In the mutant strain obtained by exposing it to chlorine, the cell membrane, especially the outer membrane, thickens and the surface structure changes, suggesting that it has a system for strengthening the cell membrane.

[0007] The literature "Pink Monsters Lurking in the Bathroom [Author: Nozomi Ihara], Journal of Bioengineering, Vol. 94, No. 4, 2016" (Non-Patent Document 2) reports that the pink stains that occur in wet areas of homes are primarily caused by the proliferation of gram-negative bacteria of the genus Methylobacterium, also known as purple bacteria. Non-Patent Document 2 also suggests that carotenoids, which are characteristic of Methylobacterium and give it its pink color, function to eliminate reactive oxygen species generated within the bacterial body when exposed to stress such as chlorine, making Methylobacterium more resistant to chlorine than other microorganisms. It is also suggested that carotenoids contribute to improving the membrane strength of Methylobacterium, thereby contributing to its chlorine resistance.

[0008] Contact infection is known to be one of the routes of infection for viruses, including coronaviruses. To prevent this, it is important to maintain hand hygiene by washing your hands or using alcohol-based disinfectants to reduce the risk of infecting others, and to ensure hygiene when using equipment that is touched by multiple people.

[0009] For this reason, for example, a method is adopted in which a highly concentrated hypochlorous acid spray is carried, and when using equipment that is touched by multiple people, the spray is sprayed on the equipment before use, and then another spray is sprayed after use.

[0010] It is already known that free chlorine such as hypochlorous acid has the function of inactivating viruses. In the document "Environmental Science & Technology, 44, 808-812 (2010)" (Non-Patent Document 3), it is reported that free chlorine was used to detect oxidative damage to the capsid protein that constitutes human norovirus particles, and the structural integrity and infectivity of the virus were evaluated. Specifically, it is reported that free chlorine oxidizes (carbonylates) a portion of Lys that constitutes the capsid protein and functional proteins present on the surface of the virus.

[0011] On the other hand, the document "Ozone: Science and Engineering, 28, 317-328 (2006)" (Non-Patent Document 4) reports on the decomposition action of ozone on biopolymers such as proteins and nucleic acids, and specifically reports that ozone oxidizes Trp, Met, His, Tyr, and Cys, which constitute capsid proteins that constitute virus particles and functional proteins present on the virus surface.

[0012] Similar to Patent Document 1, Japanese Patent Laid-Open No. 2016-108733 (Patent Document 4) proposes a method for disinfecting facilities that use tap water by electrolyzing tap water to generate free chlorine such as hypochlorous acid and then flowing the resulting solution into the facility. The methods described in these documents are believed to be able to inactivate viruses without the need for cumbersome work such as spraying the above-mentioned hypochlorous acid spray on the facility before and after use. However, the hypochlorous acid obtained by the method proposed in Patent Document 4 and the like is of low concentration, and therefore it takes time to inactivate viruses. Therefore, when multiple people use the equipment in succession, there is a risk of inconvenience, such as some people using the equipment in a state where viruses have not been inactivated sufficiently. Furthermore, organic contaminants containing nitrogen or sulfur are present in water-related environments and in human feces containing viruses. When such contaminants are present, free chlorine and oxidizing agents may preferentially consume (act on) these contaminants before inactivating the viruses. Therefore, there is a need for technology that can sufficiently inactivate viruses while removing the organic contaminants when dealing with contaminants containing both viruses and organic matter.

[0013] Bacteria and mold that adhere to areas where water is used, such as toilets, bathrooms, kitchens, and washbasins, can exist in a state where they coexist with organic matter as they multiply, or can exist in layers on the solid surfaces that make up the above areas. The literature, "The Inactivation Effect of Ozone Water on Bacteria and Viruses [Author: Katsuhiko Nakamuro], Journal of the Electrostatic Society, 35, 4, 154-160 (2011)" (Non-Patent Document 5), reports that if the medium contains oxidizable substances such as organic matter in addition to the bacteria and viruses that are the target of sterilization or inactivation, these will easily react with ozone, causing the ozone to disappear before inactivating the bacteria and viruses, and thereby reducing the inactivation effect of the ozone.

[0014] To address this issue, Japanese Patent Application Laid-Open No. 2016-035196 (Patent Document 5) proposes a method of cleaning bacteria and dirt on the target parts of water-related equipment by spraying them with normal water that does not contain any disinfecting ingredients. This method is said to be able to clean organic dirt and accumulated bacteria in advance, allowing the disinfecting effect of ozone water to reach deep into the accumulated bacteria.

[0015] Furthermore, Japanese Patent Laid-Open Publication No. 2008-168231 (Patent Document 6) proposes a method for discharging cleaning water for the purpose of removing organic dirt from the area around the bathroom wash area, followed by discharging sterilizing water such as free chlorine. This method is characterized by removing organic dirt in advance along with the cleaning water in order to prevent a decrease in the effectiveness of the sterilizing water. In this case, if sterilizing water is discharged when there is a large amount of cleaning water remaining (residual water), the sterilizing components of the sterilizing water will be immediately diluted by the remaining water, and there is a risk that the sterilizing effect of the sterilizing water will be weakened. Therefore, it is important that the discharge of cleaning water forms a flow toward the drain outlet, and that there is time between the discharge of cleaning water and the discharge of sterilizing water to ensure time for reaction between organic dirt and the cleaning water and time for draining the wastewater. This is because if the sterilizing water is discharged before the wastewater is discharged, the effectiveness of the sterilizing water may be reduced, and it is considered preferable to discharge the sterilizing water in such a way that the organic matter and cleaning water are not mixed with each other as much as possible. However, since chlorine-resistant Methylobacterium is resistant to free chlorine, free chlorine does not provide a sufficient bactericidal effect, while ozone requires a high concentration for sterilization.

[0016] Furthermore, when suppressing bacterial growth continuously over a long period of time, it is desirable to efficiently automatically control the discharge of the electrolyzed water. JP 2001-353204 (Patent Document 7) discloses a device that predicts the growth state of bacteria present in a target area based on the environment, such as the temperature and moisture of the target area, the amount of nutrients, or the frequency and duration of use by the user, and controls the electrolytic generation concentration and supply amount of hypochlorous acid according to the growth state of the bacteria. The device described in Patent Document 7 efficiently electrolyzes and discharges hypochlorous acid water according to the growth state of bacteria, but regardless of the growth state of bacteria, it is necessary to generate high-concentration hypochlorous acid, which requires the addition of chloride ions, to suppress chlorine-resistant Methylobacterium. It is also easy to imagine generating hypochlorous acid by replacing it with ozone, but even in this case, the required ozone concentration is still high, which poses a risk to human health, a risk of resin deterioration, and increases the load on the electrodes. [Prior art documents] [Patent documents]

[0017] [Patent Document 1] Japanese Patent Application Publication No. 10-306484 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-073604 [Patent Document 3] Japanese Patent Application Laid-Open No. 2008-168002 [Patent Document 4] Japanese Patent Application Laid-Open No. 2016-108733 [Patent Document 5] Japanese Patent Application Laid-Open No. 2016-035196 [Patent Document 6] Japanese Patent Application Laid-Open No. 2008-168231 [Patent Document 7] Japanese Patent Application Laid-Open No. 2001-353204 [Non-patent literature]

[0018] [Non-Patent Document 1] Chlorine resistance mechanism of Protomonas extorquens frequently isolated from drinking tank water [Author: Katsunori Furuhata], Society of Antibacterial and Antifungal Agents, Vol. 19, No. 8, pp. 395-399, 1991 [Non-patent document 2] Pink Monster Lurking in the Bathroom [Author: Nozomi Ihara], Journal of Bioengineering, Vol. 94, 2016 [Non-patent document 3] Environmental Science & Technology, 44, 808-812(2010) [Non-patent document 4] Ozone: Science and Engineering, 28, 317-328(2006) [Non-Patent Document 5] Inactivation effect of ozone water on bacteria and viruses [Author: Katsuhiko Nakamuro], Journal of the Electrostatic Society of Japan, 35,4,154-160(2011) Summary of the Invention [Problem to be solved by the invention]

[0019] The present inventors have discovered a novel configuration for facilities using tap water in buildings that can reliably suppress contamination of desired locations by microorganisms, particularly chlorine-resistant Methylobacterium or viruses. Specifically, by simultaneously discharging a first modified water containing a specific active ingredient and a second modified water containing a specific active ingredient different from the first modified water and ensuring that these modified waters are mixed at the desired location, i.e., ensuring that the active ingredients contained in each modified water can act simultaneously on microorganisms or viruses, the growth of chlorine-resistant Methylobacterium or viruses can be effectively suppressed, or the grown chlorine-resistant Methylobacterium or viruses can be effectively sterilized or inactivated, thereby reliably suppressing contamination.

[0020] The present invention is based on this finding. Specifically, an object of the present invention is to provide a facility in a building where tap water is used, which ensures that two types of modified water containing specific active ingredients are mixed at a desired location, i.e., by allowing these modified waters to act simultaneously on chlorine-resistant Methylobacterium or viruses, thereby effectively inhibiting the growth of chlorine-resistant Methylobacterium or viruses, or effectively sterilizing or inactivating the grown chlorine-resistant Methylobacterium or viruses. [Means for solving the problem]

[0021] The facility according to the present invention is a facility in a building where tap water is used, The equipment in question is: a device for producing a first reformed water and a second reformed water; a pipe for supplying tap water to the device; a discharge unit for discharging the first modified water and the second modified water to a location where contamination by microorganisms or viruses is desired to be suppressed; A control unit; It is equipped with the first reforming water and the second reforming water are discharged simultaneously; The first reformed water and the second reformed water, when mixed together, have any one of the following compositions A, B, C, and D: A: Contains 0.05 ppm or more of ozone and 1.5 ppm or more of free chlorine. B: Contains 0.1 ppm or more of ozone and 0.75 ppm or more of free chlorine; C: Contains 0.2 ppm or more of ozone and 0.1 ppm or more of free chlorine, D: Contains 0.5 ppm or more of free chlorine and more than 15 ppm of hydrogen peroxide; The present invention is characterized in that the signal is generated so that: [Effects of the Invention]

[0022] According to the present invention, the growth of chlorine-resistant Methylobacterium or viruses on the surfaces of equipment where tap water is used can be effectively inhibited, or chlorine-resistant Methylobacterium or viruses grown on the surfaces can be effectively sterilized or inactivated, by using a low concentration of an active ingredient selected from ozone, hydrogen peroxide, and free chlorine, and a low concentration of another active ingredient. The growth inhibitory effect and / or sterilizing or inactivating effect of chlorine-resistant Methylobacterium or viruses can be maintained for a long period of time. Furthermore, the present invention provides advantages such as not impairing the durability of components constituting equipment where tap water is used, such as resins and rubbers, not imposing a load on the modified water generating device, and not impairing the life of electrodes. In addition, even if the active ingredients are at a low concentration, such as those produced using tap water with no added salt as a raw material, by combining them, it is possible to obtain the effect of inhibiting the growth of chlorine-resistant Methylobacterium or viruses and / or killing or inactivating them, thereby maintaining the hygiene and cleanliness of bathrooms without causing any hassle to customers. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a schematic diagram showing that the modified water of the present invention can exhibit an effective bactericidal action against chlorine-resistant Methylobacterium. [Figure 2](A) Schematic showing that low concentrations of free chlorine alone can have a bactericidal effect on standard strains of Methylobacterium. (B) Schematic showing that low concentrations of free chlorine alone cannot have a bactericidal effect on chlorine-resistant Methylobacterium. [Figure 3] 1 is a schematic diagram showing an example of the configuration of equipment according to the present invention, the equipment 1 includes a reformed water generating device 2 that generates first reformed water and second reformed water. [Figure 4] 1 is a schematic diagram showing another example of the configuration of the equipment according to the present invention. In equipment 1A, a reformed water generator (2A or 2B) for generating first reformed water and a reformed water generator (2B or 2A) for generating second reformed water are arranged in parallel. [Figure 5] 4 shows an example of a circuit for a modified water generating device 2 included in the facility 1 shown in Fig. 3. In the device 2, ozone or hydrogen peroxide and free chlorine can be simultaneously generated using one electrode pair. [Figure 6] 4 is an example of a circuit of the reformed water generating device 2 provided in the facility 1 shown in Fig. 3. The device 2 is provided with a separate electrode pair (connected in series) capable of generating ozone or hydrogen peroxide and a separate electrode pair (connected in series) capable of generating free chlorine. [Figure 7] 5 shows an example of a circuit of modified water producing devices 2A and 2B provided in the facility 1A shown in FIG. [Figure 8] In the circuit shown in FIG. 6, reformed water containing ozone is produced not by electrolysis of tap water, but by generating ozone gas and dissolving it in tap water. [Figure 9] In the circuit shown in FIG. 7, reformed water containing ozone is produced not by electrolysis of tap water, but by generating ozone gas and dissolving it in tap water. [Figure 10] 10 shows an example of a control sequence when the first reforming water and the second reforming water are simultaneously discharged. [Figure 11] An example of a control sequence when the first reforming water and the second reforming water are discharged at different times will be shown. [Figure 12] 10 is a flowchart showing an example of a method for controlling the equipment 1A of FIGS. 4, 7, and 9 according to an embodiment of the present invention. [Figure 13] An example of a control sequence for discharging the first reforming water and the second reforming water each time will be shown. [Figure 14] 10 shows an example of a control sequence when the reforming water is discharged in the first mode and the second mode. [Figure 15] An example of a control sequence when the reformed water is discharged in the CT value variable mode is shown. [Figure 16] 1 is a schematic diagram of a toilet as an example of equipment according to the present invention. [Figure 17] 1 is a schematic diagram of a urinal as an example of equipment according to the present invention. [Figure 18] 1 is a schematic diagram of a bathroom as an example of equipment according to the present invention. [Figure 19] 1 is a schematic diagram of an automatic faucet for a washbasin, which is an example of equipment according to the present invention. [Figure 20] 1 is a schematic diagram of a kitchen sink including an automatic kitchen faucet, which is an example of equipment according to the present invention. [Figure 21] 1 is a schematic diagram of an automatic kitchen faucet, which is an example of equipment according to the present invention. [Figure 22] FIG. 1 is a graph showing the bactericidal effect when modified water containing only free chlorine is allowed to act on chlorine-resistant Methylobacterium. [Figure 23]Examples of free chlorine and ozone concentration conditions under which a synergistic bactericidal effect on chlorine-resistant Methylobacterium is observed are shown. (a) This shows the bactericidal effect when modified water containing 1.5 ppm of free chlorine and 0.1 ppm of ozone is allowed to act on chlorine-resistant Methylobacterium. (b) This shows the bactericidal effect when modified water containing 0.375 ppm of free chlorine and 0.2 ppm of ozone is allowed to act on chlorine-resistant Methylobacterium. (c) This shows the bactericidal effect when modified water containing 0.75 ppm of free chlorine and 0.2 ppm of ozone is allowed to act on chlorine-resistant Methylobacterium. (d) This shows the bactericidal effect when modified water containing 1.5 ppm of free chlorine and 0.2 ppm of ozone is allowed to act on chlorine-resistant Methylobacterium. (e) This shows the bactericidal effect when modified water containing 1.5 ppm of free chlorine and 0.05 ppm of ozone is allowed to act on chlorine-resistant Methylobacterium. (f) A graph showing the bactericidal effect when modified water containing 1.0 ppm of free chlorine and 0.1 ppm of ozone is allowed to act on chlorine-resistant Methylobacterium. (g) A graph showing the bactericidal effect when modified water containing 0.2 ppm of free chlorine and 0.2 ppm of ozone is allowed to act on chlorine-resistant Methylobacterium. [Figure 24]

[0046] Examples of free chlorine and ozone concentration conditions in which a synergistic bactericidal effect on chlorine-resistant Methylobacterium was observed in the presence of a moderate concentration of organic matter are shown. (a) This shows the bactericidal effect when modified water containing 2.0 ppm of free chlorine and 0.2 ppm of ozone was allowed to act on chlorine-resistant Methylobacterium. (b) This shows the bactericidal effect when modified water containing 4.9 ppm of free chlorine and 1.0 ppm of ozone was allowed to act on chlorine-resistant Methylobacterium. (c) This shows the bactericidal effect when modified water containing 4.9 ppm of free chlorine and 2.9 ppm of ozone was allowed to act on chlorine-resistant Methylobacterium. [Figure 25]This shows the concentration conditions of free chlorine and ozone under which no synergistic bactericidal effect was observed against chlorine-resistant Methylobacterium. (a) This shows the bactericidal effect when modified water containing 0.375 ppm of free chlorine and 0.1 ppm of ozone was allowed to act on chlorine-resistant Methylobacterium. (b) This shows the bactericidal effect when modified water containing 0.75 ppm of free chlorine and 0.1 ppm of ozone was allowed to act on chlorine-resistant Methylobacterium. [Figure 26] The preferred range of ozone and free chlorine concentrations in the modified water that exerts a synergistic effect in killing chlorine-resistant Methylobacterium is visually shown as the area surrounded by Equations 1, 2, and 3. [Figure 27] (a) shows the results of virus inactivation effect test 13. (b) shows the results of virus inactivation effect test 14. [Figure 28] (a) shows the results of virus inactivation effect test 15-1, and (b) shows the results of virus inactivation effect test 15-2 in the presence of a medium concentration of organic matter. [Figure 29] The preferred range of ozone and free chlorine concentrations in the modified water that exerts a synergistic effect on virus inactivation is visually shown as the area surrounded by Equations 1, 2, and 3. [Figure 30] FIG. 1 is a schematic diagram for explaining the procedure of Test 18 <Step 11>. [Figure 31] FIG. 1 is a schematic diagram for explaining the procedure of Test 18 <Step 13>. [Figure 32] Examples of free chlorine and hydrogen peroxide concentration conditions (Tests 23 to 26) that demonstrated a synergistic bactericidal effect on chlorine-resistant Methylobacterium are shown below. [Figure 33] The following shows examples of the concentration conditions of free chlorine and hydrogen peroxide (Tests 27 to 30) in which a synergistic bactericidal effect on chlorine-resistant Methylobacterium was observed in the presence of a moderate concentration of organic matter. [Figure 34] The preferred range of concentrations of hydrogen peroxide and free chlorine contained in the modified water that exerts a synergistic effect in killing chlorine-resistant Methylobacterium is visually shown as the area surrounded by Equations 4, 5, 6, and 8. DETAILED DESCRIPTION OF THE INVENTION

[0024] Basic configuration The basic configuration of the equipment according to the present invention will be described with reference to Fig. 3. In the embodiment shown in Fig. 3, the equipment 1 is an equipment in a building that uses tap water. The equipment 1 is characterized by including a reformed water generating device 2 that generates first reformed water and second reformed water, piping 3 that supplies tap water to the reformed water generating device 2, a discharge unit 4 that discharges the reformed water to an area where contamination by microorganisms or viruses needs to be suppressed, and a control unit 5. The control unit 5 controls, for example, the start-up of the reformed water generating device and the discharge of the reformed water. Details of the control by the control unit 5 will be described later.

[0025] The equipment according to the present invention may generate a mixed water of the first reforming water and the second reforming water in a single reforming water generating device, and simultaneously discharge the first reforming water and the second reforming water as a single mixed water (see FIGS. 3 and 5, etc., described later). The first reforming water and the second reforming water may be generated separately in one or more reforming water generating devices (see Figures 4, 6, 7, etc., described later) and discharged simultaneously. This feature is called "simultaneous discharge," and will be described in detail later. In the present invention, as long as the first reformed water and the second reformed water are discharged simultaneously, the terms "first reformed water and second reformed water" or "first and second reformed water" include both a mode in which the first reformed water and the second reformed water are produced separately and a mode in which the first reformed water and the second reformed water are produced at the same time as a mixed (substantially one type of) reformed water.

[0026] Alternatively, the equipment according to the present invention may start discharging the second reforming water after starting discharging the first reforming water. In this case, The second reforming water is discharged by The discharge of the first reforming water is started after being stopped, or or Starts while the first reformed water is being discharged Hereinafter, this feature will be referred to as "differential ejection." In other words, the equipment according to the present invention, which satisfies the "differential discharge" requirement of the present invention, starts discharging the second modified water when the first modified water remains at least in the area where contamination by microorganisms or viruses is desired to be suppressed. In other words, the state in which both the first modified water and the second modified water coexist in the above-mentioned area is maintained for a predetermined period of time, and as a result, it is possible to maintain a state in which both of the active ingredients contained in each modified water can simultaneously act on microorganisms (such as chlorine-resistant Methylobacterium and other common bacteria) and viruses.

[0027] With these features, the system of the present invention can efficiently kill microorganisms and viruses, especially those in the presence of organic matter. Furthermore, even if the concentrations of the active ingredients contained in the first modified water and the second modified water are low, the system can effectively kill microorganisms and viruses.

[0028] In the "differential discharge" of the present invention, the discharge of the second reforming water is started preferably less than 30 seconds, more preferably less than 20 seconds, even more preferably less than 10 seconds, advantageously less than 1 second, and even more advantageously 0 seconds after the discharge of the first reforming water has stopped. The "differential discharge" of the present invention is preferably controlled by the control unit 5, which will be described later.

[0029] Facilities that use tap water In the present invention, a "building" where tap water is used is defined as: Dwellings such as detached houses, apartment buildings, etc. for people to live in; Office buildings, offices, business establishments, etc. where people work; Commercial and public facilities used by people; This includes all buildings that are socially accepted as being used for human life, including the above.

[0030] In the present invention, "facility where tap water is used" means facility used by users in a building, which discharges tap water alone, or tap water and reformed water simultaneously or at different times, during or before or after use of the facility. "Facility where tap water is used" may further comprise a means for supplying tap water, or may be composed of the means for supplying tap water itself. "Means for supplying tap water" includes so-called water pipes arranged in a building, or means that enable tap water distributed from the water pipes to be ultimately supplied to the facility where tap water is used, as well as things that constitute the facility where tap water is used and by which tap water is supplied.

[0031] In the present invention, specific examples of facilities using tap water include: Toilet bowls, urinals, heated toilet seats, heated toilet seats with integrated toilets, toilet bowl units, toilet bowl cleaning devices, cleaning devices for private parts cleaning nozzles; Bathrooms (including unit baths), bathroom cleaning devices that use tap water, bathtub cleaning devices that use tap water; Washbasins, automatic faucets for bathrooms, devices for cleaning toothbrushes, cups, etc.; and Automatic kitchen faucets, kitchen sinks, devices for cleaning cutting boards, sponge scrubbers, etc., dishwashing devices; etc.

[0032] tap water In the present invention, "tap water" refers to water that has been subjected to sterilization treatment such as chlorination at a water purification plant and is supplied to buildings such as houses, and "tap water" includes not only clean water but also recycled water. The grey water is preferably one that has been subjected to a sterilization treatment such as chlorine disinfection. In the present invention, it is preferable to produce modified water by subjecting tap water directly to, for example, electrolysis.

[0033] Modified water (Type of modified water) In the present invention, the modified water contains, as an active ingredient, a component having oxidizing power. These components have the ability to kill chlorine-resistant Methylobacterium or to inactivate viruses. In one embodiment of the present invention, the modified water is an aqueous solution containing at least one active ingredient selected from the group consisting of ozone (O), free chlorine, and hydrogen peroxide. In the present invention, free chlorine refers to hypochlorous acid (HClO) and hypochlorite ions (ClO - ) combination (mixture).

[0034] (oxidation-reduction potential of reformed water) The strength of the oxidizing power of the reforming water is determined by the oxidation-reduction potential of the active ingredient contained in the reforming water. For example, according to the Electrochemistry Handbook (6th edition, Maruzen), the oxidation-reduction potential of hypochlorous acid (HClO), which is a type of free chlorine, is 1.63 V, and components with stronger oxidizing power than hypochlorous acid include ozone (oxidation-reduction potential 2.06 V) and hydrogen peroxide (oxidation-reduction potential 1.76 V).

[0035] (First and second reformed water) In the present invention, it is preferable to use two types of reformed water: reformed water containing free chlorine and reformed water containing a component with a stronger oxidizing power than free chlorine. In one embodiment of the present invention, one of these two types of reformed water is referred to as the first reformed water, and the other is referred to as the second reformed water. For convenience, in the present invention, whether the first reformed water containing one active ingredient and the second reformed water containing another active ingredient are produced separately or simultaneously, i.e., one active ingredient and another active ingredient are mixed, both of these embodiments are encompassed by the terms "first reformed water and second reformed water" or "first and second reformed water." In either embodiment, the first (or second) reformed water is synonymous with the reformed water containing the first (or second) active ingredient. In the latter embodiment, the first reformed water also serves as the second reformed water. When the first reformed water contains free chlorine, the second reformed water preferably contains a component having a stronger oxidizing power than free chlorine, which component is preferably ozone or hydrogen peroxide. The components of the first and second reforming waters may be interchanged, i.e., the first reforming water may contain a component with a stronger oxidizing power than free chlorine, and the second reforming water may contain free chlorine. In other words, it is preferable that either the first or second reforming water contains free chlorine as a main component, and the other reforming water may be selected from those having a higher oxidation-reduction potential than free chlorine, specifically ozone or hydrogen peroxide.

[0036] Incidentally, it is known that when ozone and hydrogen peroxide are mixed, they react with each other to generate OH radicals, consuming each other. On the other hand, in the present invention, the combination of free chlorine and ozone, or free chlorine and hydrogen peroxide, does not react with each other when mixed, and therefore is not consumed in the reformed water generating device or piping. Therefore, even if the active ingredients in the first and second modified waters have a low concentration, they can easily act on the site (P) efficiently. Furthermore, since highly reactive OH radicals are not generated when mixed, it is advantageous in that damage to the components of the equipment 1 and the components of the part (P) can be suppressed. On the other hand, it is quite surprising that the above combination can exert a synergistically high bactericidal effect against chlorine-resistant Methylobacterium and a synergistically high inactivating effect against viruses, despite not generating OH radicals, which have strong bactericidal or virus-inactivating effects.

[0037] (The first role of reformed water) Role 1: Oxidize and wash away organic matter present as dirt. For this reason, it is first discharged onto the area (P) where contamination needs to be suppressed. Note that "dirt" includes, for example, feces, urine, saliva, food, cooking oil, seasonings, sebum, keratin, detergent, cosmetics, and components of biofilms secreted by attached microorganisms. Role 2: When combined with the second modified water, it exerts cytotoxicity on chlorine-resistant Methylobacterium and inactivates viruses. In other words, when the discharge of the second modified water begins while the first modified water is being discharged, or after the discharge of the first modified water has stopped and while the first modified water remains in section (P), the first modified water and the second modified water are mixed, and the active ingredients contained in each modified water act simultaneously on chlorine-resistant Methylobacterium and viruses, thereby exerting their bactericidal and inactivating abilities synergistically. Here, in order for the active ingredient contained in the first modified water to remain in the region (P), it is desirable to use an ingredient that has a high residual property in the region (P) as the active ingredient. Of the active ingredients contained in the first and second modified waters, free chlorine has a higher residual property, so it is more preferable that the first modified water contains free chlorine and the second modified water contains ozone or hydrogen peroxide.

[0038] (The second role of reformed water) Role: When combined with the first modified water, it exerts cytotoxicity on chlorine-resistant Methylobacterium and inactivates viruses.

[0039] (Concentration of active ingredients contained in modified water) In the present invention, the concentration of the active ingredient refers to the concentration of each active ingredient in the first and second modified waters when they are discharged from the discharge portion 4.

[0040] (Method for quantifying concentration of reformed water) The method for quantifying the ozone concentration in water is the indigo method, as defined in JIS B 9946:2019, which involves measuring the concentration of indigo decolorized by reaction with ozone using a spectrophotometer and calculating the ozone concentration from the decrease in absorbance.

[0041] The method for quantifying the free chlorine concentration in water is the DPD colorimetric method defined in JIS K 0400-33-10:1999, in which free chlorine reacts with DPD (N,N-diethyl-p-phenylenediamine) to produce a red color.

[0042] The method for quantifying hydrogen peroxide in water is the oxidation-reduction titration method specified in the Japanese Pharmacopoeia, in which hydrogen peroxide is reacted with potassium permanganate and the point at which a sudden change in potential difference occurs is detected as the equivalent point. Alternatively, the amount may be determined based on the color reaction of a dye (Xylenol Orange) that occurs when iron ions are oxidized by hydrogen peroxide.

[0043] (Preferred active ingredient and its concentration range) In the present invention, the concentrations of the active ingredients contained in the modified water are preferably 0.05 ppm or more for ozone, more than 5 ppm for hydrogen peroxide, and 0.1 ppm or more for free chlorine, which allows for excellent bactericidal and inactivating effects against chlorine-resistant Methylobacterium and viruses, as will be described later.

[0044] In the present invention, the upper limit of the ozone concentration contained in the reformed water is preferably 3 ppm or less, more preferably less than 3 ppm, and even more preferably 2.9 ppm or less. The upper limit of the hydrogen peroxide concentration contained in the reformed water is preferably less than 350,000 ppm, more preferably 35,000 ppm or less, even more preferably less than 3,500 ppm, advantageously 350 ppm or less, even more advantageously 35 ppm or less, and even more advantageously 15 ppm or less. In this case, the cell walls and cell membranes of chlorine-resistant Methylobacterium or the outer shell of the virus can be effectively destroyed, allowing free chlorine to penetrate into the bacterial cells or viruses, while also providing advantages such as not impairing the durability of components constituting the equipment of the present invention, such as resin and rubber materials, not imposing a load on the modified water production device, and not impairing the lifespan of the electrodes.

[0045] In the present invention, the upper limit of the free chlorine concentration is not particularly limited, but is, for example, preferably less than 5 ppm, more preferably 4.9 ppm or less, even more preferably 4 ppm or less, advantageously 3 ppm or less, and even more advantageously 2 ppm or less. At such a concentration, the current applied to the electrodes is not high, and electrode deterioration can be suppressed. This eliminates the need for frequent electrode replacement, improving user convenience. Furthermore, the increase in electrode area is suppressed, enabling electrolysis in flowing water, allowing the reformed water generating device to be made smaller. The above-mentioned free chlorine concentration is suitable for the reformed water generating device of the present invention.

[0046] In the present invention, ozone or hydrogen peroxide, which is a preferred active ingredient of the modified water, and free chlorine coexist at the site (P) during the modified water discharge period. This allows a synergistic bactericidal effect and inactivation effect against chlorine-resistant Methylobacterium and viruses. In order for ozone or hydrogen peroxide and free chlorine to coexist at the site (P), in addition to the "differential discharge" of the present invention, a method of mixing and discharging the first modified water and the second modified water (simultaneous discharge) can be used. In the case of differential discharge, the type and concentration of the active ingredients coexisting at the site (P), or in the case of simultaneous discharge, the type and concentration of the active ingredients contained in the modified water obtained by mixing the first modified water and the second modified water, can be any of the following A, B, C, D, E, F, and G: A: 0.05 ppm or more of ozone and 1.5 ppm or more of free chlorine B: Ozone above 0.1 ppm and free chlorine above 0.75 ppm C: 0.2 ppm or more of ozone and 0.1 ppm or more of free chlorine D: Hydrogen peroxide greater than 5 ppm and free chlorine greater than 1.5 ppm E: Hydrogen peroxide greater than 10 ppm and free chlorine greater than 1.0 ppm F: Hydrogen peroxide exceeding 15 ppm and free chlorine exceeding 0.5 ppm G: More than 20 ppm of hydrogen peroxide and 0.1 ppm or more of free chlorine It is preferable that:

[0047] In the present invention, in the case of synchronous discharge, when one of the first and second reforming waters contains 0.05 ppm or more of ozone, the other preferably has a free chlorine concentration of 1.6 ppm or more, more preferably 2.0 ppm or more. In the case of simultaneous discharge, when the mixed reforming water contains 0.05 ppm or more of ozone, the free chlorine concentration is preferably 1.6 ppm or more, more preferably 2.0 ppm or more.

[0048] In the present invention, in the case of synchronous discharge, when one of the first and second reforming waters contains 0.1 ppm or more of ozone, the other preferably has a free chlorine concentration of 1.0 ppm or more, more preferably 1.5 ppm or more. In the case of simultaneous discharge, when the mixed reforming water contains 0.1 ppm or more of ozone, the free chlorine concentration is preferably 1.0 ppm or more, more preferably 1.5 ppm or more.

[0049] In the present invention, in the case of synchronous discharge, when one of the first and second modified waters contains 0.2 ppm or more of ozone, the concentration of free chlorine contained in the other is preferably 0.2 ppm or more, more preferably 0.3 ppm or more, and even more preferably 0.375 ppm or more. Also, in the case of simultaneous discharge, when the mixed modified water contains 0.2 ppm or more of ozone, the concentration of free chlorine is preferably 0.2 ppm or more, more preferably 0.3 ppm or more, and even more preferably 0.375 ppm or more.

[0050] In the present invention, in the case of synchronous discharge, when one of the first and second reforming waters contains 0.3 ppm or more of ozone, the concentration of free chlorine contained in the other is preferably 0.1 ppm or more, more preferably 0.2 ppm or more, even more preferably 0.3 ppm or more, and most preferably 0.375 ppm or more. Also, in the case of simultaneous discharge, when the mixed reforming water contains 0.3 ppm or more of ozone, the concentration of free chlorine is preferably 0.1 ppm or more, more preferably 0.2 ppm or more, even more preferably 0.3 ppm or more, and most preferably 0.375 ppm or more.

[0051] In the present invention, in the case of synchronous discharge, if one of the first and second reforming waters contains more than 5 ppm of hydrogen peroxide, the other preferably has a free chlorine concentration of 1.6 ppm or more, more preferably 2.0 ppm or more. In the case of simultaneous discharge, if the mixed reforming water contains more than 5 ppm of hydrogen peroxide, the free chlorine concentration is preferably 1.6 ppm or more, more preferably 2.0 ppm or more.

[0052] In the present invention, in the case of synchronous discharge, if one of the first and second reforming waters contains more than 10 ppm of hydrogen peroxide, the other preferably has a free chlorine concentration of 1.1 ppm or more, more preferably 1.5 ppm or more. In the case of simultaneous discharge, if the mixed reforming water contains more than 10 ppm of hydrogen peroxide, the free chlorine concentration is preferably 1.1 ppm or more, more preferably 1.5 ppm or more.

[0053] In the present invention, in the case of synchronous discharge, if one of the first and second reforming waters contains more than 15 ppm of hydrogen peroxide, the other preferably has a free chlorine concentration of 0.6 ppm or more, more preferably 1.0 ppm or more. In the case of simultaneous discharge, if the mixed reforming water contains more than 15 ppm of hydrogen peroxide, the free chlorine concentration is preferably 0.6 ppm or more, more preferably 1.0 ppm or more.

[0054] Bactericidal mechanism of chlorine-resistant Methylobacterium when exposed to low concentrations of ozone or hydrogen peroxide and free chlorine In the present invention, when the first and second modified waters are allowed to act on chlorine-resistant Methylobacterium by the "differential discharge" method of the present invention, specifically, when modified water containing a low concentration of ozone or hydrogen peroxide and modified water containing a low concentration of free chlorine are allowed to act on chlorine-resistant Methylobacterium in this order or in the reverse order by the "differential discharge" method of the present invention, or when the first and second modified waters are allowed to act on chlorine-resistant Methylobacterium by the "simultaneous discharge" method of the present invention, specifically, when modified water containing both ozone or hydrogen peroxide and free chlorine at low concentrations, for example, obtained by mixing the first and second modified waters, is allowed to act on chlorine-resistant Methylobacterium, the mechanism by which ozone or hydrogen peroxide and free chlorine exert a synergistic effect in killing chlorine-resistant Methylobacterium is thought to be as follows. However, the following is merely a hypothesis, and the present invention should not be construed as being limited by these factors.

[0055] Ozone or hydrogen peroxide has strong oxidizing power, so even at low concentrations it can damage or destroy the cell walls and thickened cell membranes (hereinafter simply referred to as "cell membranes") of chlorine-resistant Methylobacterium (hereinafter simply referred to as "bacteria"). On the other hand, ozone or hydrogen peroxide is an unstable molecule, and its oxidizing power is short-lived. Therefore, low concentrations of ozone or hydrogen peroxide alone are difficult to sustain enough oxidizing power (cytotoxicity) to overcome the bacterial cells' defenses against oxidative damage and oxidatively decompose the biological materials (nucleic acids, proteins, etc.) inside the bacterial cells after destroying the cell walls and membranes, and are therefore insufficient to reliably kill the bacterial cells. However, in the present invention, low concentrations of free chlorine oxidize and decompose the biological materials present inside the cell membranes destroyed by ozone or hydrogen peroxide, thereby reliably killing the chlorine-resistant Methylobacterium. The effect of the modified water of the present invention on chlorine-resistant Methylobacterium is shown in Figure 1. (In Figure 1, the chlorine-resistant strain indicates chlorine-resistant Methylobacterium, and the gray area indicates the thickened cell membrane of chlorine-resistant Methylobacterium. Note that the cell wall is not shown.)

[0056] As shown in Figure 2B, low concentrations of free chlorine alone are difficult to destroy the cell wall and thickened cell membrane of chlorine-resistant Methylobacterium. However, in the present invention, as described above, low concentrations of ozone or hydrogen peroxide can fulfill this role instead. Therefore, free chlorine can penetrate the cell membrane destroyed by ozone or hydrogen peroxide and penetrate into the bacterial cell. Furthermore, since free chlorine can exert its oxidizing power continuously, it can reliably oxidize and decompose biological materials after penetrating into the bacterial cell. Note that Figure 2A shows that for a standard strain of Methylobacterium that has not acquired chlorine resistance, even low concentrations of free chlorine alone can destroy the cell membrane and further oxidize and decompose biological materials inside the bacterial cell.

[0057] On the other hand, the initial action of free chlorine followed by the action of ozone or hydrogen peroxide can also produce a synergistic killing effect on chlorine-resistant Methylobacteria. In this case, it is presumed that free chlorine damages the cell walls and thickened cell membranes of chlorine-resistant Methylobacterium, promoting the penetration of ozone or hydrogen peroxide into the interior of the bacterial body, whereby the ozone or hydrogen peroxide oxidizes biological materials (nucleic acids, proteins, etc.) and exerts a bactericidal effect.

[0058] As described above, the modified water of the present invention effectively utilizes the properties of ozone or hydrogen peroxide and free chlorine, and can achieve sterilization of chlorine-resistant Methylobacterium, which has been difficult to achieve even when either one is present at a high concentration, even when both are present at low concentrations, particularly when the ozone concentration is at least 0.05 ppm.

[0059] Virus inactivation effect when ozone or hydrogen peroxide and free chlorine are applied at low concentrations The inventors have discovered that although tap water electrolysis usually produces only low concentrations of free chlorine, by generating not only free chlorine but also ozone or hydrogen peroxide, viruses can be reliably inactivated simply by applying the resulting modified water for a short period of time, and have confirmed this effect. The mechanisms of action for inactivating viruses by using both ozone or hydrogen peroxide and free chlorine at low concentrations are thought to be (1) and (2) below, and it is believed that viruses can be sufficiently inactivated by either (1) or (2), or by combining both (1) and (2). However, the matters described below are merely hypotheses, and the present invention should not be construed as being limited by these matters in any way.

[0060] Mechanism of action (1): Ozone enhances viral genome damage caused by free chlorine As mentioned above, it is known that ozone or hydrogen peroxide oxidizes Trp, Met, His, Tyr, and Cys in the capsid proteins that make up virus particles and in functional proteins present on the virus surface (Environmental Science & Technology, 44, 808-812 (2010)). However, short-term exposure to low concentrations of ozone or hydrogen peroxide does not sufficiently inactivate viruses. However, oxidation of capsid proteins and functional proteins by low concentrations of ozone or hydrogen peroxide appears to have the unexpected effect of loosening the rigid polyhedral structure of virus particles, making it easier for free chlorine to penetrate the viral outer shell. As a result, it is thought that free chlorine can reach the genomic RNA or DNA inside the virus, causing extremely efficient oxidative damage to the viral genome, thereby reliably inactivating the virus.

[0061] Mechanism of action (2): Synergistic oxidation of viral proteins by ozone or hydrogen peroxide and free chlorine As mentioned above, ozone or hydrogen peroxide oxidizes Trp, Met, His, Tyr, and Cys, which constitute the capsid protein and functional proteins of virus particles, while free chlorine oxidizes (carbonylates) some of the Lys residues that constitute the capsid protein and functional proteins (Ozone: Science and Engineering, 28, 317-328 (2006)). Short-term exposure to low concentrations of ozone or hydrogen peroxide, or free chlorine alone is generally expected to be insufficient to cause loss of capsid or functional proteins because only a limited number of amino acid residues are oxidized. Furthermore, combined exposure to low concentrations of ozone or hydrogen peroxide and low concentrations of free chlorine only increases the number of amino acid residues oxidized by one, and is therefore unlikely to be more effective in causing loss of protein function. However, in reality, it is surprising that by combining low concentrations of ozone or hydrogen peroxide with low concentrations of free chlorine, for example by oxidizing just one amino acid residue with free chlorine, it is possible to very efficiently cause loss of protein function. As a result, it is believed that it will be possible to reliably inactivate the virus.

[0062] As described above, the modified water of the present invention effectively utilizes the properties of ozone or hydrogen peroxide and free chlorine, and can inactivate viruses, which has been difficult to achieve even when both are at low concentrations, or when either one is at a high concentration.

[0063] Method for producing modified water In the present invention, there are three main methods for producing modified water: (1) Electrolysis method: Produced by electrolyzing tap water (also simply called "electrolysis"). (2) Gas method: Activates air to generate gas containing active ingredients, and then dissolves the generated gas in tap water. (3) Reagent method: High-concentration reagent is dissolved in tap water to produce the solution.

[0064] In the specific embodiment of the present invention described below, method (1) will be mainly described. Method (1) generates modified water by electrolyzing tap water while it is flowing through the system, and the modified water is electrolyzed water, which can be immediately discharged. However, if the effective ingredient of the reforming water is ozone, method (2) may also be used. Method (3) requires the user to take the trouble of replenishing the reagents, but since the equipment 1 does not need to have the functions of electrolysis or gas generation, the configuration of the equipment 1 can be simplified.

[0065] Modified water generator In a preferred embodiment of the present invention, the reformed water generating device 2 has a function of electrolyzing tap water to generate first reformed water and second reformed water.

[0066] For example, as shown in FIG. 5, the modified water generating device 2 includes: an electrode pair 231 for simultaneously producing the first reformed water and the second reformed water; a power source 21 that applies a current or current to the electrode pair 231; a switch 22 for switching the power on / off; The modified water generating device 2 may be provided with the above. The switch 22 may be configured to be controlled by the control unit 5.

[0067] The modified water generating device 2 includes: The reformed water generating device 2 may be equipped with two electrode pairs: an electrode pair (A) that generates a first reformed water, and an electrode pair (B) that generates a second reformed water.

[0068] The modified water generating apparatus 2 shown in FIG. 6 is an example that includes a pair of electrodes (A) 232 and (B) 233, which are arranged in series. Furthermore, as shown in FIG. 7, the reformed water generating apparatus 2 may be divided into a reformed water generating apparatus 2A equipped with an electrode pair (A) 232 and a reformed water generating apparatus 2B equipped with an electrode pair (B) 233, or the reformed water generating apparatuses 2A and 2B may be arranged in parallel.

[0069] (Example of a series arrangement) An example of the configuration of the reformed water producing device 2 in which two electrode pairs (A) and (B) are arranged in series will be described. For example, as shown in FIG. 6, in the reforming water generating device 2, an electrode pair (A) 232 that generates first reforming water and an electrode pair (B) 233 that generates second reforming water are arranged in series. To activate each electrode pair, a power supply 21 (21A, 21B) that applies a current or a voltage and a switch 22 (22A, 22B) that switches the power supply 21 (21A, 21B) on and off may be provided. The switch 22 (22A, 22B) may be configured to be controlled by the control unit 5.

[0070] In the embodiment shown in FIG. 6, two pairs of electrodes are sufficient: one capable of generating ozone or hydrogen peroxide, and the other capable of generating free chlorine. The electrode pair (A) 232 consists of an anode 2321 and a cathode 2322 . The electrode pair (B) 233 consists of an anode 2331 and a cathode 2332 . The pair of electrodes may, for example, both be plate-shaped. Tap water is electrolyzed between the anode 2321 and the cathode 2322 to generate ozone (O3, a in FIG. 6). In addition, tap water is electrolyzed between the anode 2331 and the cathode 2332 to produce free chlorine (i.e., hypochlorous acid molecules (HClO, b in Figure 6) and hypochlorite ions (ClO - , c)) in Figure 6 is generated. In this embodiment, a configuration in which ozone is generated by the electrode pair (A) and free chlorine is generated by the electrode pair (B) has been exemplified. However, it goes without saying that a configuration in which free chlorine is generated by the electrode pair (A) and ozone is generated by the electrode pair (B) may be adopted, for example, by appropriately replacing or selecting the electrode pair (anode, cathode).

[0071] (Example of parallel arrangement) An example configuration will be described in which two electrode pairs (A) and (B) are arranged in two reformed water generators 2A and 2B, respectively, and the reformed water generators 2A and 2B, i.e., the electrode pairs (A) and (B), are arranged in parallel. 7, the electrically reformed water generator 2A has an electrode pair (A) 232 capable of generating ozone or hydrogen peroxide, and the reformed water generator 2B has an electrode pair (B) 233 capable of generating free chlorine, and the reformed water generators 2A and 2B are arranged in parallel. It goes without saying that it is also possible to configure the electrode pair (A) to generate free chlorine and the electrode pair (B) to generate ozone or hydrogen peroxide, for example, by appropriately switching or selecting the electrode pair (anode, cathode). To activate each electrode pair, a power supply 21 (21A, 21B) for applying a current or voltage and a switch 22 (22A, 22B) for switching the power supply 21 (21A, 21B) on and off may be provided.

[0072] In the present invention, the reformed water generators 2, 2A, and 2B are preferably connected downstream of a pipe 3 that supplies tap water to these reformed water generators, as shown in Figures 5, 6, and 7, for example. This allows tap water to flow into the reformed water generators. The reformed water generators may be provided with, for example, a sealable member to prevent leakage of the tap water supplied from the pipe 3. The reformed water generators may also be provided with an electrolytic cell that can electrolyze tap water to produce the reformed water.

[0073] In the present invention, it is preferable that the tap water supplied to the reformed water generator be temperature-regulated, and it is therefore preferable that the facility of the present invention be provided with a temperature regulator. The temperature regulator is preferably provided between the piping 3 and the reformed water generator that generates ozone, and heats the tap water before supplying it to the reformed water generator. The present invention is characterized in that an effective sterilizing effect or virus inactivating effect can be obtained with a low concentration of ozone. When ozone is generated by electrolyzing water, it is known that the lower the water temperature, the higher the concentration of generated ozone (Surface Technology, vol. 56, 106-112 (2005)). By increasing the temperature of tap water and electrolyzing it, it is possible to prevent the concentration of generated ozone from becoming excessively high, even in winter when the water temperature is low. Furthermore, even when ozone gas is generated from atmospheric oxygen and dissolved in tap water, the solubility of ozone gas decreases as the water temperature increases, so the concentration of generated ozone can be prevented from becoming excessively high.

[0074] In the present invention, the electrolysis of tap water by the modified water generating device may be carried out by either a storage system or a flow-through system electrolysis method, which will be described later. In the case of a storage-type electrolysis system, for example, a valve for stopping water is provided between the reformed water production device and the pipes 7, 7A, and 7B through which the reformed water is supplied, and the reformed water production device 2 is operated with tap water stored in an electrolytic cell which may be equipped with an electrode pair. This makes it possible to intentionally increase the concentration of the reformed water produced. In the case of a storage-type electrolysis system, it is preferable to ensure time for storing tap water and to provide a mechanism for controlling the opening and closing of the valve.

[0075] In the case of a water-flow-type electrolysis system as shown in Figures 5, 6, and 7, for example, the reformed water generators 2, 2A, and 2B are operated while tap water is being passed through the pipe 3 to the reformed water generators 2, 2A, and 2B. This allows the generated reformed water to be passed through the pipes 7, 7A, and 7B quickly. It also allows the generated reformed water to be discharged quickly to the location (P). In the water-flow-type electrolysis system, it is preferable to start the reformed water generators 2, 2A, and 2B simultaneously with or after tap water is passed through the pipe 3 to the reformed water generators 2, 2A, and 2B. In the case of a water-flow-type electrolysis system, electrolysis is performed while the water is being passed, so the generated reformed water has a lower concentration than in a storage-type electrolysis system. However, according to the present invention, even in the case of low-concentration modified water obtained by the water-flow electrolysis method, chlorine-resistant Methylobacterium can be rapidly killed at a high rate, as will be described later. The electrolysis method using a water-flow system can produce reformed water in a short time, and therefore, in the present invention, the electrolysis method using a water-flow system is preferred from the viewpoint of quickly inactivating chlorine-resistant Methylobacterium in particular.

[0076] In the present invention, the modified water generating apparatus described above preferably does not include a means for supplying a chlorine compound to the electrodes. In other words, the modified water generating apparatus of the present invention does not require the supply of a chlorine compound to the electrodes. To adjust (increase) the concentration of free chlorine contained in the modified water to a desired concentration, it is possible to add a chlorine compound, such as sodium chloride, sodium hypochlorite, or hypochlorous acid water, to tap water, as disclosed in Patent Document 2. To achieve this, it is also possible to provide the modified water generating apparatus with a means for storing the chlorine compound or a valve for supplying the chlorine compound to the electrodes. However, in the present invention, as already described, tap water is directly electrolyzed to produce modified water containing a specific low concentration of ozone or hydrogen peroxide, a specific low concentration of free chlorine, or a specific low concentration of both ozone or hydrogen peroxide and free chlorine, which can effectively kill or inactivate chlorine-resistant Methylobacterium or viruses. The modified water generating apparatus of the present invention is capable of producing such modified water. Therefore, in the present invention, there is no need to add a chlorine compound to tap water, which is the raw material, in order to obtain a specific low concentration of free chlorine (together with a specific low concentration of ozone or hydrogen peroxide).

[0077] (electrode) In the present invention, the electrodes of the reformed water generating device may be of two types: one capable of generating at least either ozone or hydrogen peroxide, and the other capable of generating at least either free chlorine or hydrogen peroxide. Alternatively, one electrode pair may be provided, and both ozone or hydrogen peroxide and free chlorine may be produced by the electrode pair.

[0078] (electrode material) The modified water generating devices shown in FIGS. 5, 6 and 7 include one electrode pair 231 or two electrode pairs (A) 232 and (B) 233.

[0079] (An electrode pair that simultaneously generates ozone or hydrogen peroxide and free chlorine) The electrode pair 231 primarily generates ozone or hydrogen peroxide and free chlorine simultaneously and may include, for example, a substrate and a catalyst layer disposed on the substrate. The substrate may be made of, for example, titanium or a titanium alloy. The catalyst layer may be a single layer or multiple layers. The material constituting the catalyst layer is preferably a metal compound containing at least one selected from tin, antimony, nickel, iron, zinc, bismuth, platinum, palladium, rhodium, ruthenium, iridium, osmium, zirconium, niobium, aluminum, gallium, cobalt, cesium, selenium, zinc, molybdenum, manganese, vanadium, germanium, tellurium, and silver, or an oxide or complex thereof. More preferably, the material is a metal compound containing at least one selected from tin, antimony, nickel, iron, zinc, and bismuth, or an oxide or complex thereof.

[0080] (Ozone generating electrode pair) The electrode pair (A) 232 primarily generates ozone and may include an anode 2321 and a cathode 2322 disposed across an electrode gap. For example, the electrode pair (A) 232 may be an electrode structure (see, for example, claim 4, paragraph 0033) described in Japanese Patent No. 6890793, which includes an anode member and a cathode member disposed across an electrode gap from the anode member. By reference to the above-mentioned patent publication, the disclosures regarding the electrode structure in this publication are incorporated herein by reference as disclosures regarding the electrode pair (A) 232 of the present invention. The material for the electrode pair (A) 232 may be any electrically conductive metal, such as platinum group elements, nickel, stainless steel, titanium, zirconium, gold, silver, carbon, iridium, or other noble metals, as well as oxides thereof, niobium oxide, tantalum oxide, or the like.

[0081] Alternatively, the electrode pair (A) 232 may be an electrode in which a catalytic layer is formed on the substrate of the anode 2321, and an ion exchange sheet and a cathode 2322 are laminated in this order on the catalytic layer. The electrolysis electrode unit described in JP 2012-12695 A can be used as such an electrode. By reference to the above publication, the disclosure of the electrolysis electrode unit in this publication is incorporated herein by reference as a disclosure of another embodiment of the electrode pair 232 of the present invention. For example, the substrate of the anode 2321 may be titanium, carbon, tungsten, niobium, or silicon, the catalytic layer of the anode may be a conductive diamond film, and the cathode may be a metal (e.g., SUS304) electrode plate having a thickness of approximately 1 mm.

[0082] (Electrode pair for generating hydrogen peroxide) The electrode pair (A) 232 may primarily generate hydrogen peroxide. The anode is preferably an anode having one or more solid oxides on its surface selected from fluorine-doped tin oxide, BiVO, AlO, TiO, WO, CeO, and LaO, as described in Japanese Patent Publication No. 6554642. Alternatively, the anode may be a solid oxide containing one or more elements selected from transition elements such as Ag, Al, Co, Cu, Nb, Ni, Ta, Ti, V, W, and Zr, and main elements such as Bi, In, Si, and Zn. Furthermore, as in JP 2014-57944 A, a ruthenium complex may be used as a catalyst, or diamond may be used for the anode electrode.

[0083] (Electrode pair that generates free chlorine) The electrode pair (B) 233 mainly generates free chlorine and may be, for example, an electrode including a substrate and a catalytic layer disposed on the substrate. The electrolysis electrode described in JP 2013-142166 A can be used as such an electrode. The disclosure of the electrolysis electrode in this publication is incorporated herein by reference as the disclosure of the electrode pair (B) 233 of the present invention. The substrate may be made of, for example, titanium or a titanium alloy. The catalytic layer may be a single layer or multiple layers. The catalytic layer may be a composite of a metal and / or metal oxide containing at least one selected from a platinum compound, an iridium compound, a rhodium compound, and a tantalum compound. Examples of platinum compounds include chloroplatinic acid and platinum chloride, with chloroplatinic acid being particularly preferred. Examples of iridium compounds include chloroiridic acid, iridium chloride, and iridium nitrate, with chloroiridic acid being particularly preferred. Examples of rhodium compounds include rhodium chloride and rhodium nitrate, with rhodium chloride being particularly preferred. Examples of tantalum compounds include tantalum chloride and tantalum ethoxide, with tantalum ethoxide being particularly preferred.

[0084] (A modified water generator that generates ozone gas and dissolves it in tap water, primarily containing ozone as an active ingredient) Of the reformed water generating devices 2A or 2B in Figures 6 and 7, the reformed water generating device that generates ozone may be a device that generates ozone gas using oxygen in the atmosphere as a raw material and dissolves the generated ozone gas in tap water.

[0085] There are two methods for generating ozone gas: Ultraviolet method: By irradiating the atmosphere with ultraviolet light from a UV light source, oxygen molecules dissociate to generate active oxygen, which then reacts with other oxygen molecules to generate ozone. Electrical discharge method: Oxygen molecules in the atmosphere are decomposed by a high-voltage electrical discharge to generate active oxygen, which then reacts with other oxygen molecules to generate ozone.

[0086] There are two methods for dissolving ozone gas into tap water: a water-passing system in which ozone gas is dissolved in the tap water as it flows, and a storage system in which tap water is stored and ozone gas is dissolved in it. In the storage system, the ozone concentration in the reformed water can be increased, but there are drawbacks in that a component for storing tap water is required and it takes time for the reformed water to be discharged. The elemental technologies for efficiently dissolving ozone gas into tap water include ejectors and gas-liquid mixers. Alternatively, ozone can be converted into fine bubbles such as microfine bubbles or fine bubbles and mixed with tap water to dissolve it. Alternatively, ozone gas can be blown into tap water through a pipe to dissolve it.

[0087] As an example of a device for producing modified water that mainly uses ozone water, ozone gas is generated by electrical discharge, tap water is passed through a water supply system, and the ozone gas is blown into the tap water through a pipe to dissolve it. This is specifically shown in Figures 8 and 9. As an example, an electric discharge method is used here, and the control unit 5 controls the supply of electricity to the electrode pair (A) of the ozone gas generating unit, but an ultraviolet method may also be used. In that case, a UV light source is provided instead of the electrode pair (A), and the control unit 5 controls the supply of electricity to the UV light source.

[0088] (A modified water generator that dissolves reagents in tap water) Of the modified water generating devices 2A and 2B in FIG. 6 and FIG. 7, the modified water generating device that generates free chlorine or hydrogen peroxide may be a device that generates modified water by dissolving a reagent in tap water. Specifically, in the case of free chlorine, sodium hypochlorite solution can be used as a reagent, and in the case of hydrogen peroxide, hydrogen peroxide solution (Japanese Pharmacopoeia name: Oxydol) can be used as a reagent. Although not shown, it is preferable that the modified water generating device 2 (2A, 2B) be provided with a connection section for setting a container containing a reagent, and an electromagnetic valve or the like for opening and closing the flow of the reagent into the piping 3. When the modified water is to be discharged, the control section 5 opens the electromagnetic valve or the like, whereby the reagent is added to the tap water, and the modified water is generated and discharged.

[0089] Discharge part The discharge unit 4 discharges the reformed water produced in the reformed water generating apparatus to the portion (P) where contamination prevention is desired. In other words, the discharge of reformed water to the portion (P) is achieved by discharging the reformed water produced in the reformed water generating apparatus from the discharge unit 4. In the present invention, as already explained, the first reformed water and the second reformed water are discharged from the discharge unit 4 so that a state or time in which they are mixed at the portion (P) is ensured at least during the reformed water discharge period; in other words, a state or time in which the active ingredients contained in each reformed water can simultaneously act on microorganisms, etc. is ensured at least during the reformed water discharge period. The state in which the first reforming water and the second reforming water are mixed at the portion (P) can be achieved by simultaneously discharging the mixed first reforming water and the second reforming water from the discharge unit 4 (simultaneous discharge), or by discharging the first reforming water and the second reforming water at different times from the discharge unit 4 (differential discharge). Differential discharge can be achieved by discharging either or both of the reforming waters at different times, such as the times shown in Figures 11A and 11B, which will be described later. Details of the timing and method of discharging the reforming water will be described later.

[0090] The discharge unit 4 may include a pipe 7 that supplies the reformed water generated in the reformed water generating apparatus from the reformed water generating apparatus 2 to the discharge unit 4. Alternatively, the discharge unit 4 may be directly connected to the reformed water generating apparatus 2.

[0091] In the configuration of the equipment 1A (FIG. 4), one discharge section 4 may be provided in each of the reformed water producing apparatuses 2A and 2B (7A, 7B).

[0092] The method of discharging the reforming water to the portion (P) may be a flowing water, a shower, or a spray, or may be a gas-liquid mixed discharge to reduce the amount of reforming water used.

[0093] Flowing is a method in which reformed water is continuously discharged. Showering is a method in which reformed water with a particle diameter of approximately 2000 μm to 300 μm is discharged. Spraying is a method in which reformed water is discharged as a mist with a particle diameter of less than 300 μm.

[0094] In the case of a shower, for example, the discharge part 4 can be provided with a water spray plate. In the case of spraying, for example, an atomizing device can be provided in the discharge section 4, and the particle size of the mist can be made small so that the modified water can be distributed over a wide area by diffusion or the like.

[0095] When discharging reforming water containing ozone, it is preferable not to make the particle size of the mist too small in order to suppress excessive evaporation of ozone from the reforming water. The particle size of the mist is measured using a laser diffraction method and expressed as the Sauter mean particle size, which is expressed by the following formula. Sauter mean particle size (D32) [μm] = Σnd 3 / Σnd 2 n: number of particles d: particle diameter [μm]

[0096] A preferred particle size in the present invention is a Sauter mean particle size calculated by the above-mentioned laser diffraction method of at least 10 μm or more, preferably 30 μm or more, and more preferably 100 μm or more. With the above particle size, the low concentration of ozone contained in the reforming water can be discharged to the area (P) where contamination needs to be reliably suppressed. Furthermore, damage to components and harm to people caused by vaporized ozone can be suppressed.

[0097] In the case of gas-liquid mixed discharge, for example, an air bubble mixing device can be provided upstream of the discharge part 4 .

[0098] Furthermore, the discharge part 4 may also have the function of discharging tap water. For example, in a urinal exemplified later, the discharge portion 4 that discharges the reformed water also serves as a discharge port that discharges tap water for cleaning the urinal.

[0099] Control Unit The control unit in the present invention will be described using the equipment 1 shown in FIGS. The control unit 5 has a function of applying electricity to the electrode pair 231 or the electrode pair (A) 232 and the electrode pair (B) 233 .

[0100] The control unit 5 may also have a function of controlling the concentration of the active ingredient by controlling either or both of the voltage and the current during the energization. Alternatively, a regulator may be installed in the modified water producing apparatus 2, and the control unit 5 may control the regulator to change the current value or voltage value.

[0101] Furthermore, when applying a constant current, the control unit 5 may measure the voltage value of the reformed water producing apparatus 2 while it is energized, and control the regulator so that the desired voltage value is achieved. Also, when applying a constant voltage, the control unit 5 may measure the current value of the reformed water producing apparatus 2 while it is energized, and control the regulator so that the desired current value is achieved.

[0102] The control unit 5 may also have a function of applying a voltage or current intermittently during the energization. In particular, when producing modified water whose main active ingredient is ozone, intermittent application is preferable because it reduces the concentration of ozone produced by the electrode (or UV light source) and prevents the ozone concentration in the discharged modified water from becoming too high.

[0103] The control unit 5 may also have the function of controlling the opening and closing of a valve 6 for tap water flowing in from the pipe 3, the opening and closing of an electromagnetic valve for reformed water flowing out from the pipe 7, manual / automatic switches, various sensors, etc., so that they operate appropriately.

[0104] In the above, when controlling the flow rate of tap water, the control unit 5 may change the discharge time by adjusting the time for which the valve 6 is opened and the time for which a current or voltage is maintained applied to the electrode pair 231, or the electrode pair (A) 232 and the electrode pair (B) 233. As a means for changing the discharge time, the control unit 5 may control the valve 6 and a switch, or a mechanism may be provided that automatically closes the valve 6 after a set time has elapsed.

[0105] Alternatively, a speed control valve may be provided in the pipe 3, and the control unit 5 may change the flow rate by controlling the opening of the speed control valve. Alternatively, an electric pump may be provided between the reformed water producing device 2 and the pipe 3, and the control unit 5 may control the current or voltage applied to the electric pump to change the flow rate.

[0106] The control unit 5 preferably further has a function of controlling the change in the position and angle of the discharge unit 4 so that the modified water is discharged so as to reliably contact the portion (P). For example, when discharging, the discharge part 4 may be controlled to move toward the vicinity of the site (P) using a motor or the like.

[0107] control In the present invention, the control unit 5 controls the operation of the equipment 1, and starts and stops the discharge of the first reforming water and the second reforming water.

[0108] (Timing of cleaning the portion (P) by discharging the first and second reforming water) In the present invention, the equipment 1 discharges the first and second reforming water at the following two timings.

[0109] 〇Each time The first and second reformed waters are discharged each time the user uses the equipment 1 (hereinafter referred to as "each time").

[0110] 〇Occasionally a mode (first mode) in which the first modified water and the second modified water are discharged and these modified waters are allowed to act simultaneously on microorganisms or viruses at the site (P), specifically, a state in which these modified waters act simultaneously on microorganisms or viruses at the site (P) is maintained for a desired period of time; a mode (second mode) in which the first reformed water, the second reformed water, or tap water is discharged alone or not; When there are two modes (hereinafter referred to as "occasionally").

[0111] (Discharge method of first and second reformed water) In the present invention, the equipment 1 discharges the first and second reforming water in the following two ways.

[0112] Simultaneous discharge When the first and second reforming waters are discharged simultaneously (hereinafter referred to as "simultaneous discharge")

[0113] 〇 Unusual discharge When the first and second reforming waters are discharged at different times rather than simultaneously (hereinafter referred to as "different time discharge").

[0114] In the above-described equipment of the present invention, the timing for cleaning the portion (P) by discharging the first and second reforming waters and the manner in which the first and second reforming waters are discharged are shown in Table 1.

[0115] [Table 1]

[0116] When the first and second reforming waters are discharged "each time" or "occasionally," the discharge method may be "simultaneous discharge" or "different time discharge."

[0117] Furthermore, the concentration of the active ingredient and the discharge time of the modified water discharged from the equipment 1 of the present invention may be changed depending on the timing of discharge.

[0118] The timing and method of ejection will be described in detail below.

[0119] (Control pattern common to simultaneous and asynchronous discharge) The control unit 5 starts discharging the first and second reforming waters. Tap water is supplied to the reformed water generating device 2 (or 2A and 2B), and the electrode pair 231, or the electrode pair (A) 232 and the electrode pair (B) 233, are activated to generate first and second reformed waters, and the generated first and second reformed waters are discharged from the discharge section 4.

[0120] (control sequence) (1. "Simultaneous Dispensing" Sequence) In the present invention, the control sequence for simultaneously discharging the first reforming water and the second reforming water can be suitably carried out according to the sequence of Figure 10, whether the reforming water generating device 2 is configured with one electrode pair 231 that simultaneously generates the first and second reforming waters (Figures 3 and 5), or is configured with two electrode pairs 232 and 233 arranged in series (Figures 6 and 8) or in parallel (Figures 4, 7 and 9).

[0121] (1-1. Basic control example) An example of basic control of the equipment 1 by the control unit 5 will be described below in chronological order with reference to FIGS. 3, 6, 8, 4, 7, and 9. FIG.

[0122] Step 1: When the equipment 1 or 1A starts discharging the reforming water, the control unit 5 starts discharging the first and second reforming waters.

[0123] Step 1 control example: The control unit 5 opens the valve 6 (or 6A and 6B) to supply tap water to the reformed water generating device 2 (or 2A and 2B). The control unit 5 turns on the switch 22 (or 22A and 22B), applies electricity from the power source 21 (or 21A and 22B) to the electrode pair 231 (or the electrode pair (A) 232 and the electrode pair (B) 233), respectively, and generates the first and second reformed water by electrolysis of tap water (activation of oxygen in the atmosphere in the case of an ozone gas method), and discharges the first and second reformed water from the discharge unit 4 through the piping 7.

[0124] Step 2: After a predetermined time t1 has elapsed, the control unit 5 stops the discharge of the first and second reforming waters.

[0125] Step 2 control example: The control unit 5 turns off the switch 22 (or 22A and 22B) and closes the valve 6 (or 6A and 6B).

[0126] (2. "Asynchronous Discharge" Sequence) In the present invention, the control sequence for starting the ejection of the first and second modified waters at different times rather than simultaneously can be suitably carried out according to the sequences shown in Figures 11A and 11B, respectively, when the two electrode pairs are configured in series (Figures 3, 6, and 8) or in parallel (Figures 4, 7, and 9).

[0127] (2-1. Two control patterns for different discharge times: Sequence A and B) In the "differential discharge" of the present invention, the start and stop of discharge of the first reforming water and the second reforming water can be suitably controlled, for example, according to the following sequences A and B. Sequence A: After the discharge of the first reforming water is stopped, control is performed to discharge the second reforming water, preferably within 30 seconds after the stop. Sequence B: After starting the discharge of the first reforming water, control is performed to start the discharge of the second reforming water while the first reforming water is being discharged, i.e., while continuing the discharge of the first reforming water, thereby discharging the first and second reforming waters simultaneously.

[0128] Control according to either sequence A or B ensures that the discharge of the second modified water is started while the first modified water remains in the area (P) where it is desired to suppress contamination by microorganisms or viruses; in other words, it ensures that a state in which both the first modified water and the second modified water coexist in the area (P) is maintained for a predetermined period of time. As a result, a state is created in which both the first active ingredient and the second active ingredient act simultaneously on chlorine-resistant methylobacterium and viruses, and the bactericidal or viral inactivating effects of both ingredients are exerted synergistically, making it possible to efficiently kill or inactivate chlorine-resistant methylobacterium or viruses, particularly chlorine-resistant methylobacterium or viruses in the presence of organic matter.

[0129] In either sequence A or B, the second modifying water may be discharged continuously or intermittently.

[0130] In addition, it is preferable that the active ingredients of the first reforming water and the second reforming water in the "differential discharge" are free chlorine for the former and ozone or hydrogen peroxide for the latter. The reason for this is as follows, for example: free chlorine has a higher residual property compared to ozone or hydrogen peroxide. By using free chlorine, which has a high residual property, as the active ingredient of the first reforming water, it is possible to most efficiently retain the active ingredients of the first reforming water until the discharge of the second reforming water begins, and therefore it is possible to achieve high effectiveness even in control where it takes a long time before the discharge of the second reforming water begins. Furthermore, when the time from the discharge of the first modified water to the start of the discharge of the second modified water is the same, the condition in which the active ingredient of the former is free chlorine exhibits a higher inactivation effect on microorganisms and viruses than the condition in which the active ingredient of the latter is free chlorine.

[0131] (2-2. Example of basic control of asynchronous discharge) An example of basic control of the equipment 1 and the equipment 1A by the control unit 5 will be described below in chronological order with reference to FIGS. 3, 6, 8, 4, 7, and 9. FIG.

[0132] (2-2-1. Control of Equipment 1: Sequence A (Fig. 3, Fig. 6, Fig. 8, and Fig. 11(A)) Step 1: When the equipment 1 starts discharging reforming water, the control unit 5 starts discharging the first reforming water.

[0133] Step 1 control example: The control unit 5 opens the valve 6 and the tap water is supplied to the reformed water generating device 2 . The control unit 5 turns on the switch 22A, energizes the electrode pair (A) 232 from the power source 21A, generates the first reformed water, and discharges the first reformed water from the discharge unit 4 through the pipe 7.

[0134] Step 2: After a predetermined time t1 has elapsed, the control unit 5 stops the discharge of the first reforming water.

[0135] Control example of step 2: The control unit 5 turns off the switch 22A.

[0136] Step 3: After a predetermined time tx (preferably less than 30 seconds) has elapsed, the control unit 5 starts discharging the second reforming water.

[0137] Control example of step 3: The control unit 5 turns on the switch 22B, energizes the electrode pair (B) 233 from the power source 21B, generates second reformed water, and discharges the second reformed water from the discharge unit 4 through the pipe 7. At this time, while the first active ingredient of the first modified water remains in the region (P), the second modified water is discharged, and the two modified waters are mixed, so that the first active ingredient and the second active ingredient (of the second modified water) coexist in the region (P). The state in which the first active ingredient of the first modified water remains in the area (P) refers to a state in which the first active ingredient remains following a state in which the first modified water remains in the form of a water film on the surface of the area (P), a state in which the first modified water moistens the surface of the area (P) in the form of a mist, a state in which the first modified water remains in the recesses or cavities of the area (P), or the like. Examples of control or configuration for achieving a state in which the first reforming water and the second reforming water are mixed include: shortening the predetermined time tx (preferably less than 30 seconds, more preferably less than 20 seconds, even more preferably less than 10 seconds, advantageously less than 1 second, and even more advantageously 0 seconds); The first modified water is ejected in the form of a mist and allowed to remain on the surface of the portion (P). The first active ingredient is concentrated at a high concentration when the first modified water is discharged, so that a sufficient concentration can be maintained when the first modified water is diluted with the second modified water. The second active ingredient is concentrated at a high concentration when the second modified water is discharged, so that a sufficient concentration can be maintained when the second active ingredient is diluted with the first modified water remaining in the region (P). The discharge amount (flow rate and / or time) of the second reforming water is reduced so that the first reforming water is not washed away and the two waters are reliably mixed. Examples include:

[0138] Step 4: After a predetermined time t2 has elapsed, the control unit 5 stops the discharge of the second reforming water.

[0139] Control example of step 4: The control unit 5 turns off the switches 22A and 22B and closes the valve 6.

[0140] (2-2-2. Control of Equipment 1: Sequence B (Figures 3, 6, 8, and 11(B))

[0141] Step 1: When the equipment 1 starts discharging reforming water, the control unit 5 starts discharging the first reforming water.

[0142] Step 1 control example: The control unit 5 opens the valve 6 and the tap water is supplied to the reformed water generating device 2 . The control unit 5 turns on the switch 22A, energizes the electrode pair (A) 232 from the power source 21A, generates the first reformed water, and discharges the first reformed water from the discharge unit 4 through the pipe 7.

[0143] Step 2: After a predetermined time t1 has elapsed, the control unit 5 starts discharging the second reforming water.

[0144] Control example of step 2: The control unit 5 turns on the switch 22B, energizes the electrode (B) 233 from the power source 21B, generates second reforming water, and discharges the second reforming water from the discharge unit 4 through the pipe 7. At this time, the first and second reforming waters are mixed and discharged.

[0145] Step 3: After a predetermined time t2 has elapsed, the control unit 5 stops the discharge of the first reforming water.

[0146] Control example of step 3: The control unit 5 turns off the switch 22A.

[0147] Step 4: After a predetermined time t3 has elapsed, the control unit 5 stops the discharge of the second reforming water.

[0148] Control example of step 4: The control unit 5 turns off the switch 22B and closes the valve 6.

[0149] (2-2-3. Control of Facility 1A: Sequence A (Fig. 4, Fig. 7, Fig. 9, and Fig. 12(A))

[0150] Step 1: When the equipment 1A starts discharging the reforming water, the control unit 5 starts discharging the first reforming water.

[0151] Step 1 control example: The control unit 5 opens the valve 6A, and tap water is supplied to the reformed water generating device 2A. The control unit 5 turns on the switch 22A, energizes the electrode pair (A) 232 from the power source 21A, generates the first reformed water, and discharges the first reformed water from the discharge unit 4 through the pipe 7A.

[0152] Step 2: After a predetermined time t1 has elapsed, the control unit 5 stops the discharge of the first reforming water.

[0153] Control example of step 2: The control unit 5 turns off the switch 22A and closes the valve 6A.

[0154] Step 3: After a predetermined time tx has elapsed, the control unit 5 starts discharging the second reforming water.

[0155] Step 3 control example: The control unit 5 opens the valve 6B, and tap water is supplied to the reformed water producing device 2B. The control unit 5 turns on the switch 22B, energizes the electrode pair (B) 233 from the power source 21B, generates second reformed water, and discharges the second reformed water from the discharge unit 4 through the pipe 7B. At this time, while the first active ingredient of the first modified water remains in the region (P), the second modified water is discharged, and the two modified waters are mixed, so that the first active ingredient and the second active ingredient (of the second modified water) coexist in the region (P). An example of control or configuration for achieving a state in which the first reforming water and the second reforming water are mixed is as explained above in "Control of Equipment 1: Sequence A."

[0156] Step 4: After a predetermined time t2 has elapsed, the control unit 5 stops the discharge of the second reforming water.

[0157] Control example of step 4: The control unit 5 turns off the switch 22B and closes the valve 6B.

[0158] (2-2-4. Control of Equipment 1A: Sequence B (Figures 4, 7, 9, and 12(B))

[0159] Step 1: When the equipment 1A starts discharging the reforming water, the control unit 5 starts discharging the first reforming water.

[0160] Step 1 control example: The control unit 5 opens the valve 6A, and tap water is supplied to the reformed water generating device 2A. The control unit 5 turns on the switch 22A, energizes the electrode pair (A) 232 from the power source 21A, generates the first reformed water, and discharges the first reformed water from the discharge unit 4 through the pipe 7A.

[0161] Step 2: After a predetermined time t1 has elapsed, the control unit 5 starts discharging the second reforming water.

[0162] Control example of step 2: The control unit 5 turns on the switch 22B, energizes the electrode pair (B) 233 from the power source 21B, generates second reformed water, and discharges the second reformed water from the discharge unit 4 through the pipe 7B. At this time, the first and second reforming waters are mixed and discharged.

[0163] Step 3: After a predetermined time t2 has elapsed, the control unit 5 stops the discharge of the first reforming water.

[0164] Control example of step 3: The control unit 5 turns off the switch 22A and closes the valve 6A.

[0165] Step 4: After a predetermined time t3 has elapsed, the control unit 5 stops the discharge of the second reforming water.

[0166] Control example of step 4: The control unit 5 turns off the switch 22B and closes the valve 6B.

[0167] (Adjusting the concentration of active ingredients in the modified water) For example, in the above-described "different time discharge" sequence A, the control unit 5 controls the first reforming water that has been applied to the portion (P) so that it is not discharged by the second reforming water. Discharge amount of second reforming water≦Discharge amount of first reforming water Discharge time of the second reforming water≦discharge time of the first reforming water It is preferable to control the temperature to .

[0168] For example, in the above-mentioned "different discharge" sequence B, Concentration of the first active ingredient in the first reformed water × Discharge amount of the first reformed water / Discharge amount of the second reformed water = Either one of the concentrations of ozone or hydrogen peroxide, or the concentration of free chlorine, shown as combinations A to G of concentrations of ozone or hydrogen peroxide and free chlorine coexisting at the portion (P) in the case of synchronous discharge above, and Concentration of the second active ingredient in the second reformed water × Discharge amount of the second reformed water / Discharge amount of the first reformed water = Either the concentration of ozone or hydrogen peroxide, or the concentration of free chlorine, which are shown as combinations A to G of concentrations of ozone or hydrogen peroxide and free chlorine coexisting in the portion (P) in the case of asynchronous discharge above, It is preferable to control the concentration and / or discharge amount of each reforming water so that the above-mentioned condition is satisfied. In the above formula, the first active ingredient may be ozone or hydrogen peroxide and the second active ingredient may be free chlorine, or the second active ingredient may be ozone or hydrogen peroxide and the first active ingredient may be free chlorine. The latter combination is preferable in terms of, for example, high residual properties of the active ingredients and high inactivation effect against microorganisms and viruses.

[0169] (Residual water volume in the first reforming water portion (P) in "different discharge") In the above-mentioned "different time discharge" sequence A, after the discharge of the first modified water is stopped, the second modified water is discharged while the first active ingredient of the first modified water remains in the region (P), and the two modified waters are mixed, so that the first active ingredient and the second active ingredient (of the second modified water) coexist in the region (P). In other words, it can be said that the second reforming water is discharged to the portion (P) while the first reforming water remains in the portion (P). Here, the remaining amount of the first reforming water (ie, the remaining water amount) in the portion (P) can be quantified, for example, as follows. Residual amount of first reforming water=(weight of member at portion (P) after discharging first reforming water)−(weight of member at portion (P)) In addition, the residual water amount per area of the part (P) can be calculated as follows. Residual water amount per area of portion (P)=(Residual water amount of first reforming water) / (Area of portion (P)) The amount of remaining water in part (P) can be quantified using a weighing scale or the like. Furthermore, if it is difficult to cut out and quantify the portion (P), a method may be used in which the remaining water on only the surface corresponding to portion (P) is absorbed by a water-absorbing material, and the weight of the water-supplying material is then quantified. In the "differential discharge" of the present invention, the residual water amount is preferably 0.2 mg / cm 2 More preferably, 1.0 mg / cm 2 or more, and even more preferably 3.8 mg / cm 2 or more, most preferably 7.5 mg / cm 2 That's all.

[0170] (3. "Each time" sequence) In the present invention, an example of a control sequence for discharging the first and second reformed waters each time a user uses them will be described below with reference to FIGS. 3, 5, and 13.

[0171] A user starts to use the equipment 1 and then stops using the equipment 1. The control unit 5 recognizes that the user has finished using the equipment 1, and then starts supplying tap water from the tap water supply pipe 3 to the reformed water generating device 2. Next, the control unit 5 turns on the switch 22 of the reformed water generating device 2, and current or voltage is applied from the power source 21 to the anode 2311 and the cathode 2312, causing the tap water supplied to the reformed water generating device 2 to be electrolyzed and reformed water to be generated. Next, the reformed water generated by the control unit 5 is passed through the reformed water supply pipe 7 and the discharge unit 4 and supplied to a portion (P) where contamination by bacteria and viruses should be suppressed. When the predetermined time t1 has elapsed, the control unit 5 stops the operation of the reformed water producing apparatus 2. Next, the control unit 5 closes, for example, the valve 6, and the supply of tap water to the reformed water generating device 2 is stopped. In this way, the bacteria sterilization and virus inactivation treatment by the equipment 1 is completed.

[0172] The lapse of the predetermined time t1 may be determined by having the control unit 5 count the lapse of an arbitrarily set time. Taking into consideration that the next user will be using the equipment 1, it is preferable that t1 be short. For example, t1 is preferably 60 seconds, more preferably 20 seconds, and even more preferably 10 seconds.

[0173] When a valve 6 is used in the present invention, the valve 6 may be configured to be controlled to open and close by the control unit 5. The control unit 5 opens the valve 6 and turns on the switch 22 of the reformed water producing device 2, thereby starting the reformed water producing device 2, producing reformed water, and discharging the produced reformed water to a portion (P) where contamination by bacteria and viruses is desired to be suppressed, thereby sterilizing bacteria and inactivating viruses in the portion (P).

[0174] The control unit 5 may have a function of controlling the concentration of the reformed water to be generated by controlling both or either the voltage and the current, in addition to the function of turning the power supply 21 on and off.

[0175] The above-mentioned "each time" sequence may be controlled in combination with a "simultaneous ejection" sequence or a "different time ejection" sequence.

[0176] (4. "Sometimes" sequence) The occasional discharge of reformed water by the equipment 1 of the present invention preferably has the following two modes. First mode: 1-1. The first reforming water and the second reforming water are discharged simultaneously, or 1-2. After starting the discharge of the first reforming water, the discharge of the second reforming water is started, and The second reforming water is discharged. The discharge of the first reforming water is started after it has been stopped, or This is started while the first reformed water is being discharged. Second mode: The first reformed water, the second reformed water, or tap water is discharged alone (2-1), or not at all (2-2).

[0177] The doubling time of Methylobacterium bacteria is an average of 5.4 hours even under optimal conditions (Japanese Journal of Microbial Ecology, vol. 4, 35-47 (1989)), which means that they grow slowly compared to bacteria such as Escherichia coli (doubling time: 20 to 30 minutes). Therefore, in order to suppress the growth of chlorine-resistant Methylobacterium at the site (P), it is sufficient and preferable to carry out the first mode at least once a day.

[0178] The first mode is preferably performed during a time period when the equipment is not in use, such as from night to early morning (for example, when the equipment 1 is installed in a commercial facility or office building). During the above time period, health damage to users can be reduced, especially when ozone is used in the modified water. Alternatively, when executing the first mode during times when the equipment is used (e.g., daytime), it is preferable to execute the first mode after taking measures such as sensing the user's use of equipment 1 or making equipment 1 unavailable.

[0179] For discharge other than the first mode, that is, discharge at predetermined time intervals or discharge each time the user uses the equipment 1, it is preferable to execute the second mode.

[0180] In the above-described embodiment, even if the first mode is performed only a few times, in other words, even if the frequency with which the first and second modified waters are simultaneously applied to the portion (P) is low, the proliferation of chlorine-resistant Methylobacterium at the portion (P) can be efficiently suppressed, thereby preventing the occurrence of pink stains. In addition, the proliferation of viruses can be efficiently suppressed. Furthermore, since the frequency of producing the first and second modified waters can be reduced, the lifespan of the electrode pair of the modified water producing device 2 and the UV light source can be extended.

[0181] (First mode, i.e., control pattern when discharging first and second reforming water) The control pattern of the first mode can be suitably controlled according to the sequence shown in FIG. 14A, similar to the "simultaneous ejection" sequence and the "different time ejection" sequence already explained.

[0182] (Control pattern (2-2) when the first and second reforming waters are not discharged in the second mode) The control unit 5 performs control such as doing nothing, discharging tap water alone, or starting discharging only the first reformed water according to program settings.

[0183] (Control pattern (2-1) when only the first or second reforming water is discharged in the second mode) The control unit 5 supplies tap water to the modified water generating device 2 (or 2A or 2B), activates the electrode pair (A) or (B) to generate first or second modified water, and discharges the generated first or second modified water from the discharge unit 4.

[0184] (Control sequence of (2-1) in the second mode) In the present invention, the control sequence for discharging only the first or second modified water (2-1) can be suitably performed according to the sequence shown in Figure 14B when two electrode pairs are configured in series (Figures 3, 6, and 8) or in parallel (Figures 4, 7, and 9).

[0185] (Example of basic control in mode 2-1) An example of basic control of the equipment 1 and the equipment 1A by the control unit 5 will be described below in chronological order with reference to FIGS. 3, 6, 8, 4, 7, and 9. FIG.

[0186] 1. When the equipment 1 or 1A starts discharging the reforming water, the control unit 5 starts discharging the first or second reforming water. Control example: The control unit 5 opens the valve 6 (or 6A or 6B) to supply tap water to the reformed water generating device 2 (or 2A or 2B). The control unit 5 turns on the switch 22A or 22B, causing current to flow from the power source 21A or 21B to the electrode pair (A) 232 or the electrode pair (B) 233, respectively, to generate first or second reformed water by electrolysis of tap water (activation of oxygen in the atmosphere in the case of an ozone gas method), and discharges the first or second reformed water from the discharge unit 4 through the piping 7. 2. After a predetermined time t1 has elapsed, the control unit 5 stops the discharge of the first or second reforming water. Control example: The control unit 5 turns off the switch 22A or 22B and closes the valve 6 (or 6A and 6B).

[0187] (Control pattern when tap water is dispensed alone in 2-1 of the second mode) The control unit 5 supplies tap water to the modified water producing device 2 (or 2A or 2B) and causes the discharge unit 4 to discharge the tap water alone.

[0188] (Control sequence when tap water is dispensed alone) In the present invention, the control sequence for discharging tap water alone can be suitably performed whether the reformed water generating device 2 is configured with one electrode pair that simultaneously generates first and second reformed waters (Figures 3 and 5), or is configured with two electrode pairs arranged in series (Figures 3, 6, and 8) or in parallel (Figures 4, 7, and 9).

[0189] (Example of basic control when discharging tap water alone) An example of basic control of the equipment 1 and the equipment 1A by the control unit 5 will be described below in chronological order with reference to FIGS. 3, 5, 6, 8, 4, 7, and 9.

[0190] 1. When the equipment 1 or 1A starts discharging tap water independently, the control unit 5 starts discharging tap water. Control example: The control unit 5 opens the valve 6 (or 6A or 6B), and tap water is supplied to the reformed water generating device 2 (or 2A or 2B), and the tap water is discharged alone from the discharge unit 4 through the pipe 7. 2. After a predetermined time t1 has elapsed, the control unit 5 stops the discharge of tap water alone. Control example: The control unit 5 turns off the switch 22A or 22B and closes the valve 6 (or 6A and 6B).

[0191] (5. Preferred embodiment of equipment 1 with "variable CT value mode") The installation according to the invention comprises: (a) Concentration of the active ingredient contained in each of the first modified water and the second modified water and (b) Discharge times of the first reforming water and the second reforming water It is preferable to change either one or both of the above depending on the discharge timing to discharge the first modified water and the second modified water.

[0192] (CT value) In the present invention, the CT value (Concentration-Time Value) refers to the concentration of an active ingredient such as free chlorine or ozone (C value: Concentration Value) and the time it takes for the active ingredient to act on bacteria or viruses (T value: Time Value). In the present invention, changing the C value means changing the concentration of the active ingredient contained in the modified water to be discharged. Also, changing the T value means changing the discharge time of the modified water. The C value and T value can also be changed simultaneously, in which case the expression "changing the CT value" is sometimes used.

[0193] The discharge of reformed water by the equipment 1 of the present invention preferably has the following two types of CT value variable modes that change the concentration of the active ingredient and the discharge time of the reformed water depending on the discharge timing. CT value variable mode A: The system includes a mode A1 in which either the first or second reforming water is ejected multiple times, or the concentrations of the first and second reforming waters are made relatively low and ejected multiple times, and a mode A2 in which, after executing mode A1, the concentration or ejection time of either or both of the first and second reforming waters is made greater than the concentration or ejection time of either or both of the first and second reforming waters in mode A1. CT value variable mode B: The system includes a mode B1 in which either the first or second reforming water is discharged within a predetermined time, or the concentrations of the first and second reforming waters are made relatively low and discharged within a predetermined time, and a mode B2 in which, after executing mode B1, the concentration or discharge time of either or both of the first and second reforming waters is made greater than the concentration or discharge time of either or both of the first and second reforming waters in mode B1.

[0194] In this embodiment, it is preferable to execute modes A2 and B2 at night.

[0195] As mentioned above, the doubling time of Methylobacterium bacteria is an average of 5.4 hours even under optimal conditions (Japanese Journal of Microbial Ecology, vol. 4, 35-47 (1989)), which means that they grow slowly compared to bacteria such as Escherichia coli (doubling time: 20 to 30 minutes). Therefore, in order to suppress the proliferation of chlorine-resistant Methylobacterium at the site (P), it is sufficient and preferable to discharge at a high CT value at least once a day.

[0196] The time period during which discharge at a high CT value is performed is preferably a time period when the equipment is not in use, such as nighttime to early morning (for example, when the equipment 1 is installed in a commercial facility or office building). The above-mentioned time period can reduce health damage to users, especially when ozone is used in the modified water. Alternatively, when discharge at a high CT value is performed during a time period when the equipment is in use (for example, during the day), it is preferable to perform it after taking measures such as sensing the use of the equipment 1 by users or making the equipment 1 unavailable.

[0197] Alternatively, this embodiment also includes a case where the CT value of either or both of the first and second reforming waters is variable. Preferably, the CT value of one of the reforming waters is varied, and more preferably, the CT value of the reforming water containing ozone is varied. More preferably, when a user of the equipment 1 is detected, the CT value is changed to a low value, or when the equipment 1 is not in use, either one or both of the first and second modified waters are changed to a high CT value.

[0198] On the other hand, bacteria other than chlorine-resistant Methylobacterium grow quickly but are not resistant to free chlorine, so they can be suppressed even if the discharge CT value is low. Therefore, when ejection at a high CT value is not necessary, that is, when ejection is performed at predetermined time intervals or each time the user uses the equipment 1, it is preferable to eject at a low CT value.

[0199] In the embodiment described above, even if the number of discharges at a high CT value is small, the proliferation of chlorine-resistant Methylobacterium at the portion (P) can be efficiently suppressed, and the occurrence of pink stains can be suppressed. Furthermore, the proliferation of bacteria other than chlorine-resistant Methylobacterium can also be efficiently suppressed. Furthermore, since the frequency of discharge at high CT values can be reduced, the lifespan of the electrode pair of the modified water generating device 2 and the UV light source can be extended.

[0200] (C value: Control pattern that changes the concentration of active ingredients contained in the modified water) The control unit 5 starts discharging the first and second reforming waters. Tap water is supplied to the reformed water generating device 2 (or 2A and 2B), and the electrode pairs (A) and (B) are activated to generate first and second reformed waters, respectively, and the generated first and second reformed waters are discharged from the discharge section 4. At this time, the control unit 5 changes the concentration of the active ingredients in the reformed water generated by electrolysis (discharge or ultraviolet irradiation in the case of the ozone gas method) by changing the voltage value, current value, and resistance value applied to the electrode pair (A) and / or (B).

[0201] (C value: Control sequence of the control pattern that changes the concentration of the active ingredient contained in the modified water) In the present invention, the control sequence for changing the concentration of the active ingredient in the first and / or second reformed water and discharging it can be suitably performed according to the sequence shown in Figure 15A, whether the reformed water generating device 2 is configured with one electrode pair that simultaneously generates the first and second reformed waters (Figures 3 and 5), or is configured with two electrode pairs arranged in series (Figures 3, 6, and 8) or in parallel (Figures 4, 7, and 9).

[0202] (C value: An example of a basic control pattern that changes the concentration of active ingredients contained in the modified water) An example of basic control of the equipment 1 and the equipment 1A by the control unit 5 will be described below in chronological order with reference to FIGS. 3, 5, 6, 8, 4, 7, and 9.

[0203] Step 1: When the equipment 1 or 1A starts discharging the reforming water, the control unit 5 starts discharging the first and second reforming waters.

[0204] Step 1 control example: The control unit 5 opens the valve 6 (or 6A and 6B) to supply tap water to the reformed water generating device 2 (or 2A). The control unit 5 turns on the switches 22 (22A and 22B) and applies electricity from the power supplies 21 (21A and 21B) to the electrode pairs 231 (electrode pairs (A) 232 and electrode pairs (B) 233). At this time, the control unit 5 changes the voltage, current, and resistance values applied to the electrode pair (A) and / or (B) as necessary to change the concentration of the active ingredient produced by electrolysis of tap water (or activation of oxygen in the atmosphere in the case of the ozone gas method). Then, first and second modified waters having desired concentrations of active ingredients are produced, and the first and second modified waters are discharged from the discharge part 4 through the pipe 7.

[0205] Step 2: After a predetermined time t1 has elapsed, the control unit 5 stops the discharge of the first and second reforming waters.

[0206] Control example of step 2: The control unit 5 turns off the switches 22A and 22B and closes the valve 6 (or 6A and 6B). Needless to say, the C value may be controlled for both the first and second reformed waters, or for either one of them.

[0207] (T value: Control pattern that changes the reforming water discharge time) The control unit 5 starts discharging the first and second reforming waters. Tap water is supplied to the reformed water generating device 2 (or 2A and 2B), and the electrode pairs (A) and (B) are activated to generate first and second reformed waters, respectively, and the generated first and second reformed waters are discharged from the discharge section 4. At this time, the control unit 5 changes the discharge time of the first and / or second reforming water by controlling the predetermined time t1 until the discharge is completed.

[0208] (T value: control sequence of control pattern that changes the reforming water discharge time) In the present invention, the control sequence for discharging the first and / or second reforming water by changing the discharge time can be suitably performed according to the sequence of Figure 15B, whether the reforming water generating device 2 is configured with one electrode pair that simultaneously generates the first and second reforming waters (Figures 3 and 5), or is configured with two electrode pairs arranged in series (Figures 3, 6, and 8) or in parallel (Figures 4, 7, and 9).

[0209] (T value: Example of a basic control pattern that changes the discharge time of reforming water) An example of basic control of the equipment 1 and the equipment 1A by the control unit 5 will be described below in chronological order with reference to FIGS. 3, 5, 6, 8, 4, 7, and 9.

[0210] Step 1: When the equipment 1 or 1A starts discharging the reforming water, the control unit 5 starts discharging the first and second reforming waters.

[0211] Step 1 control example: The control unit 5 opens the valve 6 (or 6A and 6B) to supply tap water to the reformed water generating device 2 (or 2A or 2B). The control unit 5 turns on the switches 22 (22A and 22B) and applies electricity from the power supplies 21 (21A and 21B) to the electrode pairs 231 (electrode pairs (A) 232 and electrode pairs (B) 233). Then, first and second modified waters having desired concentrations of active ingredients are produced, and the first and second modified waters are discharged from the discharge part 4 through the pipe 7.

[0212] Step 2: After a predetermined time t1 has elapsed, the control unit 5 stops the discharge of the first and second reforming waters.

[0213] Control example of step 2: The control unit 5 turns off the switches 22A and 22B and closes the valve 6 (or 6A and 6B). At this time, the control unit 5 changes the time t1 until 22 (switches 22A and 22B) or valve 6 (or 6A and 6B) is closed as necessary, and controls the time for discharging the first and second reforming water from the discharge unit 4. Needless to say, the T value may be controlled for both the first and second reformed waters, or for either one of them. Needless to say, the control pattern for controlling the C value described above may be combined with control for controlling the T value to perform control for simultaneously changing the C value and the T value (control of the CT value).

[0214] Optional Components Signal sending section In the present invention, taking the facility 1 as an example, the reformed water generating apparatus 2 is preferably started by the control unit 5 each time the user finishes using the facility 1. When starting the reformed water generating apparatus 2, the control unit 5 causes tap water to be supplied to the reformed water generating apparatus 2. For example, as already explained in the case of the tap water electrolysis method, it is preferable to start the reformed water generating apparatus 2 while tap water is being supplied to the reformed water generating apparatus 2 from the piping 3. Here, it is preferable to start the reformed water generating apparatus 2 without touching the facility 1. For this reason, it is preferable to provide a signal sending unit 8 for sending a start signal to the control unit 5. The signal sending unit 8 may or may not be provided in the facility 1.

[0215] The signal sending unit 8 may be a detection unit that detects the end of use of the equipment 1, or a sending unit that sends the user's intention (the end of use of the equipment 1, i.e., an instruction to start the cleaning process for the area (P) where contamination should be suppressed). Also, the signal sending unit 8 may be provided separately with a detection unit that detects the end of use of the equipment 1 or a sending unit that sends the user's intention.

[0216] The detector for detecting the end of use of the equipment 1 can be, for example, a sensor capable of detecting human movement. In this case, the detector detects the user's exit from the equipment 1, automatically detecting the end of use of the equipment 1 and sending a signal to the control unit 5. When the equipment 1 is a toilet, the detector can be, for example, a sensor capable of detecting the user sitting on or leaving the toilet seat. Specifically, when the equipment 1 is a toilet, a sensor capable of detecting the user sitting on or leaving the toilet seat can be used. Specifically, a seat sensor for detecting the user sitting on the toilet seat, a seat exit sensor for detecting the user leaving the seat, a single sensor for detecting both the user sitting on and the user leaving the seat, or a combination of a seat sensor and a seat exit sensor (each sensor is separate). A sensor for detecting the opening and closing of the toilet door can also be used. Alternatively, the detector can be triggered by an operation of the equipment 1 operated by the control unit 5 in response to an operation related to the end of the user's use of the equipment 1. Here, an example of an operation related to the end of the user's use of the equipment 1 is a toilet flushing operation. In this case, it is preferable that the toilet flushing be performed without touching the toilet.

[0217] The sending unit that sends the user's intention can preferably be a mobile communication means such as the user's smartphone, in which case the end of use of the equipment 1 is detected by the user's intention, and a signal is sent to the control unit 5.

[0218] As described above, when the user finishes using the equipment 1, a signal indicating the end of use of the equipment 1 is detected, for example, automatically or by the user's will, by the signal sending unit 8, and the signal is sent to the control unit 5. Based on the signal, the control unit 5 activates the reformed water generating device 2, thereby producing reformed water containing ozone or hydrogen peroxide and reformed water containing free chlorine; or reformed water containing ozone or hydrogen peroxide and free chlorine. This reformed water is discharged to a location (P) where microbial contamination should be suppressed.

[0219] Areas where microbial or viral contamination needs to be suppressed In the present invention, the area (P) where contamination by microorganisms or viruses needs to be suppressed refers to an area where chlorine-resistant Methylobacterium carried over from tap water can adhere, specifically, an area where chlorine-resistant Methylobacterium or viruses can adhere when tap water comes into contact with or is discharged. It also refers to areas where viruses brought in by users can adhere, specifically areas where viruses can adhere through contact with secretions such as saliva and sweat, or excrement such as feces and urine.

[0220] Examples of moieties (P) include, for example: Toilet bowl, seat, nozzle, filter; Urinal bowls, traps and strainers; Bathroom bathtubs, bathtub covers, floors, walls, ceilings, drains, hair catchers, bath aprons, counters, faucets, shower heads, towels, sponges; Bathroom sink, tap, drain, hair catcher, cup, toothbrush; Kitchen sink, drain, wire basket, cutting board, knife, dishcloth, dishes, sponge scrubber.

[0221] Configuration of the installation according to the present invention The following describes the configuration of the installation according to the present invention. In the following, specific examples of each equipment will be explained using an example of a reformed water generating apparatus 2 that has one electrode pair and generates both first and second reformed water using this electrode pair, but the reformed water generating apparatus 2 may also have a separate electrode pair that can generate the first reformed water and a separate electrode pair that can generate the second reformed water, with the two electrode pairs arranged in series or parallel. In the following, when the first and second reforming waters are simultaneously mixed at the location (P) and discharged, an example will be described in which the first and second reforming waters are simultaneously generated and discharged by the reforming water generating device 2. However, it goes without saying that the method may also be such that the discharge of the second reforming water is started after the discharge of the first reforming water has started, and the discharge of the second reforming water is started after the discharge of the first reforming water has stopped, or while the first reforming water is being discharged.

[0222] toilet bowl According to one embodiment of the present invention, the equipment 1 of the present invention is a toilet. Below, the configuration of a warm water washing toilet seat-integrated toilet 10 (hereinafter simply referred to as "toilet 10") will be explained with reference to Figures 16 and 3.

[0223] <Activation> The equipment in the toilet 10 that uses tap water includes the bowl 104 of the Western-style seated toilet 102, the sanitary cleaning device (warm water washing toilet seat) 103, the casing 101, the toilet seat 105, the toilet lid 106 (optional), and the floor and walls of the toilet. In this embodiment, the means for providing tap water to the equipment that uses tap water refers to piping (not shown) that supplies tap water into the bowl 104 to flush the toilet 102 and remove excrement in the bowl 104, and piping that supplies tap water to the sanitary cleaning device (warm water washing toilet seat) 103.

[0224] The reformed water generating device may be, for example, the reformed water generating device 2, 2A, or 2B described above, and may be attached inside the toilet seat (preferably a warm-water washing toilet seat) or outside the toilet bowl. In FIG. 16, the reformed water generating device 2 is provided inside a casing 101. The reformed water discharge means that enables the reformed water to come into contact with the surface of the equipment is a spray nozzle (spouting unit) 107, which may be provided inside the casing 101 or attached externally. The spray nozzle 107 discharges the reformed water generated by the reformed water generating device in the form of a mist M, and as a result, the reformed water comes into contact with the surface of the equipment, i.e., the surface of the equipment where tap water is used (e.g., the surface of the bowl 104 and the waterline), and the surfaces of the floor and walls of the toilet. As a result, the surface of the equipment 1 is sterilized.

[0225] In this embodiment, for example, after flushing of the toilet bowl 103 is completed, or at regular intervals, or when a manual switch is turned on, the modified water generating device generates modified water, and the modified water is sprayed from the spray nozzle 107, thereby sterilizing the surface of the bowl 104.

[0226] [control] Tap water is guided through a solenoid valve 6 to a pipe 3 and flows into the reformed water generating device 2, where first and second reformed waters are generated. The generated reformed water passes through a pipe 7, is then guided to a spray nozzle 107, and is sprayed into a bowl 104.

[0227] urinal According to one embodiment of the present invention, the fixture 1 of the present invention is a urinal. The configuration of the urinal 11 will be described below with reference to Figs. <Activation> The equipment in which tap water is used, which is included in the urinal 11, includes the bowl 112 and casing 111 of the urinal 11. In this embodiment, the means for providing tap water to the equipment in which tap water is used refers to piping (not shown) that supplies tap water into the bowl 112 to clean the bowl 112 and remove excrement in the bowl 112, and piping that supplies tap water to the casing 111.

[0228] The reformed water generating device may be, for example, the reformed water generating device 2, 2A, or 2B described above, and may be installed inside or outside the urinal. In FIG. 17, the reformed water generating device 2 is provided inside a casing 111. The reformed water discharge means that enables the reformed water to contact the surface of the bowl 112 is a spray nozzle (spout unit) 4, which may be provided inside the casing 111 or attached to the outside. The spray nozzle 4 discharges the first and second reformed waters generated by the reformed water generating device in a shower-like manner, so that the reformed water comes into contact with the surface of the bowl 112 and a drain trap (not shown). As a result, the surface of the equipment 1 is sterilized.

[0229] In this embodiment, for example, after flushing of the bowl 112 is completed, or at regular intervals, or when a manual switch is turned on, modified water is generated in the modified water generating device, and the modified water is sprayed from the spray nozzle 4, thereby sterilizing the surface of the bowl 112.

[0230] Bathroom or shower room According to one aspect of the present invention, the facility of the present invention is a bathroom or shower room. The configuration of a bathroom will be exemplified below with reference to Figure 18. The facilities in bathroom 12 that use tap water include bathtub 123, washing area (floor) 125, drain 126, bathroom walls 122 and ceiling, shower, counter, mirror, hot water control panel (none of which are shown), etc. In this embodiment, the means for supplying tap water to the facilities that use tap water are a water faucet, shower (none of which are shown), etc.

[0231] The modified water generating device may be, for example, the modified water generating device 2, 2A, or 2B described above, and may be attached to, for example, the bathroom floor 125, counter, or wall 122. In the example shown in FIG. 18, the modified water generating device 2 is installed in a casing, and the first and second modified waters generated by the device 2 are distributed to the discharge unit 4 through piping 7. The discharge unit 4 is a modified water discharge means (a discharge unit for discharging modified water to a location) that allows the modified water to come into contact with the surfaces of the bathroom. The discharge unit 4 discharges the modified water in a shower-like manner into the bathtub 123, sterilizing and cleaning the walls and floor of the bathtub. The discharge unit 4 discharges the modified water in a shower-like manner onto the bathroom interior walls (ceiling, walls, and floor) of the bathroom, sterilizing and cleaning the walls and floor of the bathtub. The drain outlet 126 discharges the hot and cold water used in the bathroom 122, as well as the modified water sprayed thereon, outside the bathroom. The hot and cold water used in the bathtub 123 and the modified water sprayed therein may be discharged from a discharge port (not shown) in the bathtub 123 to the drain port 126.

[0232] [control] Tap water is introduced into the reformed water generating device 2 and electrolyzed to generate reformed water. The generated reformed water passes through piping 7, is supplied to discharge unit 4, and is discharged onto the inner surface of bathtub 123. The reformed water also passes through piping 7, is supplied to discharge unit 124, and is discharged into washing area 125. The reformed water further passes through piping 7, is supplied to discharge unit 124, and is discharged onto the walls and ceiling of bathroom 51. In addition to the functions already described, control unit 5 of reformed water generating device 2 has the function of controlling the generation of reformed water according to a program and the operation of switches (not shown), and controlling the operation of on-off valves (not shown) in each flow path.

[0233] [Effect] The modified water discharged into the bathtub 123 serves to sterilize the bathtub 123. The modified water discharged into the washing area 125 serves to sterilize the washing area 125. The modified water discharged onto the wall surface of the bathroom 122 serves to sterilize the wall surface (ceiling, walls) of the bathroom 122.

[0234] In this embodiment, whether the bathtub, the washing area, the bathroom walls, or a combination of these is cleaned, at least a portion of the sealing water in the drain trap installed in the drain outlet 126 can be replaced with modified water and sterilized. As a result, the effect of inhibiting microbial stains such as slime and pink stains in the bathtub 123, the washing area 125, the walls of the bathroom 122, and the drain trap can be maintained for a long period of time.

[0235] Automatic faucet for bathroom According to one aspect of the present invention, the facility of the present invention is an automatic washbasin faucet. Hereinafter, the configuration of the automatic washbasin faucet 13 will be illustrated with reference to Figure 19 .

[0236] The equipment that uses tap water included in the automatic washbasin faucet 13 includes a bowl 139 and a washbasin counter (not shown). The bowl 139 receives tap water discharged from the automatic washbasin faucet 13 and drains it from a drain (not shown). In this embodiment, the means for providing tap water to the equipment that uses tap water is the automatic washbasin faucet 13. In this embodiment, the automatic washbasin faucet 13 discharges tap water and reformed water. The automatic washbasin faucet 13 includes, for example, any of the reformed water generating devices 2, 2A, and 2B described above. In this embodiment, the reformed water generating device is attached, for example, to the piping of the automatic washbasin faucet 13 or nearby, in a position where reformed water can be discharged onto the surface of the bowl 139 and where a tap water pipe can be connected.

[0237] [control] The automatic washbasin faucet 13 is supplied with reformed water produced by the reformed water producing device 2, and the reformed water is appropriately sprayed toward the bowl 139 upon detection by a switch or sensor (not shown).

[0238] [Effect] Spraying the modified water can maintain for a long time the effect of suppressing microbial stains such as slime and pink stains on the bowl 139, drain outlet, and drain trap (none of which are shown). In this embodiment, the discharged modified water can also be sprayed on toilet implements such as toothbrushes and cups to sterilize them.

[0239] The automatic washbasin faucet 13 not only dispenses tap water and modified water, but may also dispense water having a function other than sterilization, such as perfume for beauty purposes. Tap water is supplied through a common flow path 137. A constant flow rate valve (not shown) keeps the flow rate on the downstream side constant.

[0240] The reforming water generating apparatus 2 generates and discharges reforming water. The control unit 5 of the reforming water generating apparatus 2 has the function of controlling the first solenoid valve 1310 and the second solenoid valve 1311 in addition to the functions already described. The first discharge part 132 discharges tap water or the like from the first discharge port 133 . The first flow path 134 supplies tap water or the like to the first outlet portion 132 . The second discharge part 135 is nozzle-shaped and sprays and discharges the reforming water from the second discharge port 136 . The pipe 7 supplies the reforming water to the second discharge part 135 . First solenoid valve 1310 opens and closes to switch between allowing and blocking the flow of tap water in first flow path 134. When the valve is open, tap water flows through first flow path 134 and is discharged from first outlet 135 of first outlet part 132 connected to the downstream end of first flow path 134. The second solenoid valve 1311 opens and closes to switch between flowing and blocking of tap water in the pipe 7. When the valve is open, tap water flows through the pipe 7, reformed water is produced in the reformed water producing device 2, and the reformed water is sprayed and discharged from the second discharge port 136 of the second discharge part 135 connected to the downstream end of the pipe 7. The first flow path 134 and the discharge pipe 138, which is the main body of the faucet through which the piping 7 is fixed, may be curved tubular members.

[0241] [control] Tap water is passed through common flow path 137, the flow rate of which is adjusted by a constant flow valve (not shown), and then passed through branched first flow path 134 and piping 7. The tap water passed through first flow path 134 is supplied to first discharge unit 132 and discharged from first discharge port 133 by control unit 5 opening and closing first electromagnetic valve 1310 in response to the operation of a sensor or switch (not shown), etc., and is used for hand washing, etc. The tap water passed through piping 7 is supplied to reformed water producing device 2 by control unit 5 opening and closing piping 7 in response to the operation of a sensor or switch (not shown), etc., and is then electrolyzed to produce reformed water, which is then passed to second discharge unit 135 and discharged as a spray from second discharge port 136.

[0242] Kitchen faucet According to one embodiment of the present invention, the equipment of the present invention is a kitchen faucet. The configuration of an automatic kitchen faucet 14 will be exemplified below with reference to Figures 20 and 21.

[0243] Equipment that uses tap water included in the automatic kitchen faucet 14 includes the sink 143, the edge of the sink, and the counter. Also included in the equipment is a dishwasher that is used in conjunction with the use of the automatic kitchen faucet 14. In this embodiment, the means for providing tap water to the equipment that uses tap water is the tap water discharge unit 142, that is, the faucet that discharges tap water. In this embodiment, the reformed water discharge means is the reformed water discharge unit 141, and the reformed water is generated by a reformed water generating device 2 disposed in the discharge device 144. In this embodiment, the reformed water generating device 2 is attached, for example, to the piping of the reformed water discharge unit 141 or nearby, in a position where reformed water can be discharged onto the kitchen surface and where a tap water pipe can be connected.

[0244] As shown in Figure 21, the discharge device 144 includes a reforming water generating apparatus 2, generates reforming water, and discharges it from a reforming water discharge unit 141. In addition to the functions already described, the control unit 5 of the reforming water generating apparatus 2 has a function of controlling a solenoid valve 6. The solenoid valve 6 opens and closes a valve to discharge or stop water in response to a control signal output from the control unit 5. When the valve is opened, reforming water is discharged from the reforming water discharge unit 141.

[0245] [control] The reformed water generated in the reformed water generating device 2 disposed in the discharge device 144 is supplied to the reformed water discharge section 141 and discharged to the inside, edge, counter, etc. of the sink 143. The timing of discharge may be detected by a sensor (not shown) and controlled by sending a signal to the control section 5, or a switch (not shown) may be provided and connected to the control section 5 so that the user can turn it on to discharge when necessary.

[0246] [Effect] By discharging the modified water into the sink 143, the inner walls of the sink can be sterilized, and at the same time, the modified water can be sprayed onto cooking utensils such as cutting boards and knives, dishes, and dish towels placed in the sink to sterilize them. Furthermore, when discharging the modified water, by replacing at least a portion of the sealing water in the drain trap installed at the drain outlet with the modified water, the effect of suppressing microbial soiling such as slime and pink stains in the drain trap can be maintained for a long period of time. [Example]

[0247] The present invention will be specifically described based on the following examples, but the present invention is not limited to these examples.

[0248] Fabrication of modified water generating device The facility 1 using the modified water generating device 2 shown in FIGS. 3 and 5 was assembled according to the following steps.

[0249] <Step 1: Preparation of electrode 23 (electrode pair 231)> The anode 2311 was prepared by providing a catalyst layer made of oxides containing antimony, tin, and nickel on a titanium substrate, for example, according to the literature "Hamed Shekarchizade at al., Effect of Elemental Composition on the Structure, Electrochemical Properties, and Ozone Production Activity of Ti / SnO2-Sb-Ni Electrodes Prepared by Thermal Pyrolysis Method, 2011 (doi:10.4061 / 2011 / 240837)." A stainless steel plate was used as the cathode 2312. The area of the anode 2311 and cathode 2312 was 8 cm2 each. 2 It was decided.

[0250] <Step 2: Assembling the modified water generating device> A rectangular container (80 mm x 50 mm x 30 mm) extending in the longitudinal direction was used as the container for the reformed water generating device 2. Openings were formed at the ends of the container for circulating tap water. One opening was provided with a pipe 3 for supplying tap water, and the other opening was provided with a pipe 7 for supplying reformed water and a discharge part 4 for discharging the reformed water. Pipes 3 and 7 are made of polyurethane tubing, and tap water and reformed water are circulated within the facility 1. An anode 2311 extending in the longitudinal direction was disposed on one wall surface within the longitudinally extending modified water generating device 2, and a cathode 2312 extending in the longitudinal direction was disposed on the other wall surface. The distance between the anode 2311 and the cathode 2312 was set to 0.5 mm by sandwiching a Teflon spacer between them.

[0251] <Step 3: Installing the control unit> A stabilized power supply was connected to the anode 2311 and the cathode 2312, a constant voltage of 15 V was applied, and a current of 14 mA / cm was applied between the anode and the cathode. 2 The current value was controlled so that a current density of 1000 kJ / s was applied. The flow rate of tap water was controlled by placing a flow valve 6 in the pipe 3.

[0252] Evaluation 1: Production of reformed water by equipment 1 1-1: Generation of reformed water Tap water (TOTO Corporation, 2-1 Nakajima, Kokurakita-ku, Kitakyushu, Fukuoka Prefecture) was adjusted to a flow rate of 0.45 L / min by the control unit and passed through the modified water generating device 2. The control unit applied a constant current to the electrode pair 231 to generate modified water containing both ozone and free chlorine.

[0253] 1-2: Measurement of ozone and free chlorine concentrations in reformed water To measure the free chlorine concentration, 10 mL of the modified water was dispensed into a water sampling bottle, a single dose of free chlorine reagent for SWIFTEST (Hach) was added and mixed, and the free chlorine concentration was quantified using a pocket residual chlorine meter (Hach). The ozone concentration was measured by collecting the modified water using an ozone concentration measurement kit (Ozone AccuVac Ampules HR pk25, Hach), setting it in a portable absorption spectrophotometer (DR1900, Hach), and quantifying the ozone concentration using the ozone concentration measurement mode. As a result, the ozone concentration was 0.23 ppm and the free chlorine concentration was 0.92 ppm.

[0254] Test Example I The following experiments confirmed that the present invention has an exceptionally excellent bactericidal effect against chlorine-resistant Methylobacterium.

[0255] Reference Example 1: Confirmation test of chlorine resistance of chlorine-resistant Methylobacterium <Step 4: Isolation of chlorine-resistant Methylobacterium> Dirt that had developed on the bowl surface of a PureRest toilet (TOTO Corporation) installed in the women's restroom on the 5th floor of Research Building No. 3 at TOTO Corporation's General Research Institute (Motomura, Chigasaki City, Kanagawa Prefecture) in an area up to 2 cm above the water surface was wiped off with a sterile cotton swab, suspended in saline, and applied to an R2A plate. After culturing at 20°C for 7 days, a plate on which numerous colonies had grown was obtained. One pink colony was selected from the plate and the bacterial species was identified using a MALDI-Biotyper (Bruker Japan). The result was a match with Methylobacterium fujisawaense B235 UFL, with a score value of 2.26. This strain was designated a "chlorine-resistant Methylobacterium." Meanwhile, Methylobacterium extorquens (NBRC15687) was purchased from the National Institute of Technology and Evaluation and used as the "Methylobacterium standard strain."

[0256] <Step 5: Electrolysis of tap water to produce water containing free chlorine> A Pt / IrO2 electrode was immersed in tap water, and a current was applied to electrolyze it, producing water containing free chlorine (hereinafter referred to as "free chlorine water"). 10 mL of this free chlorine water was dispensed into a water sampling bottle, and a single dose of free chlorine reagent for SWIFTEST (Hach) was added and mixed, and the free chlorine concentration in the free chlorine water was quantified using a pocket residual chlorine meter (Hach).

[0257] <Step 6: Measurement of the bactericidal effect when the modified water containing free chlorine is allowed to act on chlorine-resistant Methylobacterium> Chlorine-resistant Methylobacterium colonies were suspended in saline and 3 x 10 8 A bacterial solution of 100 cells / mL was prepared. Similarly, a bacterial solution of the standard strain of Methylobacterium was prepared. In step 5, 50 mL of water containing 0 to 4 ppm of free chlorine was prepared, and 0.5 mL of the bacterial solution of the chlorine-resistant Methylobacterium and the Methylobacterium standard strain was added and mixed. This exposed the chlorine-resistant Methylobacterium and the Methylobacterium standard strain to free chlorine. After 10 seconds, 1 mL of the reaction solution was sampled and neutralized by mixing with 0.1 mL of 1% sodium thiosulfate. The neutralized solution was diluted and inoculated onto an R2A plate, and cultured at 20°C for 7 days. The number of colonies that appeared was counted to quantify the number of viable bacteria. The number of viable bacteria was quantified when pure water was exposed to a chlorine-resistant Methylobacterium and a standard strain of Methylobacterium as controls. The survival rate of each was calculated by dividing the number of viable bacteria when exposed to the modified water by the number of viable bacteria in the control. As a result, as shown in Figure 22, the chlorine-resistant Methylobacterium showed a survival rate of more than 0.1 even at 4 ppm of free chlorine. On the other hand, the survival rate of the standard strain of Methylobacterium was below 0.001 at 1.5 ppm of free chlorine. These results confirmed that the chlorine-resistant Methylobacterium used in Reference Example 1 had very strong chlorine resistance.

[0258] Test 1: Bactericidal effect of modified water containing 1.5 ppm of free chlorine and 0.1 ppm of ozone on chlorine-resistant Methylobacterium <Step 7: Electrolysis of tap water to produce ozone-containing water> Tap water was passed through a water purifier, MP02-3 (Mitsubishi Chemical Cleansui Corporation), and the water with free chlorine removed was stored in a bottle. Next, a constant current of 1.5 A was applied to a commercially available diamond electrode while the free chlorine-removed water was electrolyzed to produce ozone-containing water (hereafter referred to as "ozonated water"). This ozonated water was collected using an ozone concentration measurement kit (Ozone AccuVac Ampules HR pk25, Hach), and the ozone concentration was quantified using a portable spectrophotometer (DR1900, Hach) in the ozone concentration measurement mode.

[0259] <Step 8: Measurement of the bactericidal effect when modified water containing both free chlorine and ozone is allowed to act on chlorine-resistant Methylobacterium> Chlorine-resistant Methylobacterium colonies were suspended in saline and 3 x 10 8 A bacterial solution of 100 cells / mL was prepared. Free chlorine water and ozone water were used alone or in combination to prepare three types of modified water (50 mL each): free chlorine only, ozone only, and both free chlorine and ozone. 0.5 mL of chlorine-resistant Methylobacterium bacteria solution was added to each modified water and mixed. In other words, each modified water was exposed to the chlorine-resistant Methylobacterium. After 10 seconds, within 40 seconds, 1 mL of the reaction solution was sampled and mixed with 0.1 mL of 1% sodium thiosulfate to neutralize it. The neutralized solution was diluted and inoculated onto an R2A plate, and cultured at 20°C for 7 days. The number of colonies that appeared was counted to quantify the number of viable bacteria. As a control, the number of viable bacteria was quantified when pure water was exposed to chlorine-resistant Methylobacterium. The sterilization rate was calculated by dividing the number of viable bacteria when the modified water was exposed by the number of viable bacteria in the control. As a result, as shown in FIG. 23(a), the kill rate of chlorine-resistant Methylobacterium was 0.0% in the modified water containing 0.1 ppm ozone, and 30.6% in the modified water containing 1.5 ppm free chlorine. On the other hand, the modified water containing both 1.5 ppm free chlorine and 0.1 ppm ozone achieved a disinfection rate of 43.1%. This effect was not merely the sum of the disinfection effects of exposure to either 1.5 ppm free chlorine or 0.1 ppm ozone alone, but surprisingly demonstrated a synergistic disinfection effect.

[0260] Test 2: Bactericidal effect of modified water containing 0.375 ppm of free chlorine and 0.2 ppm of ozone on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in FIG. 23(b), the kill rate of chlorine-resistant Methylobacterium was 9.4% in the modified water containing 0.2 ppm ozone, and 10.6% in the modified water containing 0.375 ppm free chlorine. On the other hand, the modified water containing both 0.375 ppm free chlorine and 0.2 ppm ozone achieved a disinfection rate of 40.9%. This effect was not merely the sum of the disinfection effects of exposure to 0.375 ppm free chlorine or 0.2 ppm ozone alone, but surprisingly demonstrated a synergistic disinfection effect.

[0261] Test 3: Bactericidal effect of modified water containing 0.75 ppm of free chlorine and 0.2 ppm of ozone on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in FIG. 23(c), the kill rate of chlorine-resistant Methylobacterium was 9.4% in the modified water containing 0.2 ppm ozone, and 19.7% in the modified water containing 0.75 ppm free chlorine. On the other hand, the modified water containing both 0.75 ppm free chlorine and 0.2 ppm ozone achieved a disinfection rate of 52.9%. This effect was not merely the sum of the disinfection effects of exposure to 0.75 ppm free chlorine or 0.2 ppm ozone alone, but surprisingly demonstrated a synergistic disinfection effect.

[0262] Test 4: Bactericidal effect of modified water containing 1.5 ppm of free chlorine and 0.2 ppm of ozone on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in FIG. 23(d), the kill rate of chlorine-resistant Methylobacterium was 9.4% in the modified water containing 0.2 ppm ozone, and 30.6% in the modified water containing 1.5 ppm free chlorine. On the other hand, the modified water containing both 1.5 ppm free chlorine and 0.2 ppm ozone achieved a disinfection rate of 77.9%. This effect was not merely the sum of the disinfection effects of exposure to either 1.5 ppm free chlorine or 0.2 ppm ozone alone, but surprisingly demonstrated a synergistic disinfection effect.

[0263] Test 5: Bactericidal effect of modified water containing 1.5 ppm of free chlorine and 0.05 ppm of ozone on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in FIG. 23(e), the kill rate of chlorine-resistant Methylobacterium was 0.0% in the modified water containing 0.05 ppm ozone, and 89.4% in the modified water containing 1.5 ppm free chlorine. On the other hand, the modified water containing both 1.5 ppm of free chlorine and 0.05 ppm of ozone achieved a sterilization rate of 99.9%. This effect was not merely the sum of the sterilization effects of exposure to either 1.5 ppm of free chlorine or 0.05 ppm of ozone alone, but surprisingly demonstrated a synergistic sterilization effect.

[0264] Test 6: Bactericidal effect of modified water containing 1.0 ppm of free chlorine and 0.1 ppm of ozone on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in FIG. 23(f), the kill rate of chlorine-resistant Methylobacterium was 2.1% in the modified water containing 0.1 ppm ozone, and 28.3% in the modified water containing 1.0 ppm free chlorine. On the other hand, the modified water containing both 1.0 ppm free chlorine and 0.1 ppm ozone achieved a disinfection rate of 68.9%. This effect was not merely the sum of the disinfection effects of exposure to 1.0 ppm free chlorine or 0.1 ppm ozone alone, but surprisingly demonstrated a synergistic disinfection effect.

[0265] Test 7: Bactericidal effect of modified water containing 0.2 ppm of free chlorine and 0.2 ppm of ozone on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in FIG. 23(g), the kill rate of chlorine-resistant Methylobacterium was 5.0% in the modified water containing 0.2 ppm ozone, and 12.5% in the modified water containing 0.2 ppm free chlorine. On the other hand, the modified water containing both 0.2 ppm free chlorine and 0.2 ppm ozone achieved a disinfection rate of 27.5%. This effect was not merely the sum of the disinfection effects of exposure to 0.2 ppm free chlorine or 0.2 ppm ozone alone, but surprisingly demonstrated a synergistic disinfection effect.

[0266] Test 8: Bactericidal effect of modified water containing 2.0 ppm of free chlorine and 0.2 ppm of ozone on chlorine-resistant Methylobacterium in the presence of a medium concentration (mg / L order) of organic matter. The bactericidal effect of the following three types of modified water against chlorine-resistant Methylobacterium was measured in the same manner as in Test 1. However, the bactericidal effect was calculated by subtracting the common logarithm of the number of remaining bacteria after exposure to the modified water from the common logarithm of the initial number of bacteria. In step 8, when 0.5 mL of a chlorine-resistant Methylobacterium bacterial solution was added to each of the prepared modified waters, bovine serum albumin (bovine serum albumin (FV), Nacalai Tesque) was added and mixed together so that the final concentration in the resulting mixed solution was 2 mg / L. Therefore, Test 8 can be considered to have been carried out in the presence of a medium concentration (on the order of mg / L) of organic matter. As a result, as shown in FIG. 24(a), the kill rate of chlorine-resistant Methylobacterium was 0 in the modified water containing 0.2 ppm ozone, and 0.69 in the modified water containing 2.0 ppm free chlorine. On the other hand, the modified water containing both 2.0 ppm free chlorine and 0.2 ppm ozone achieved a disinfection rate of 1.03. This effect was not merely the sum of the disinfection effects of exposure to either 2.0 ppm free chlorine or 0.2 ppm ozone alone, but surprisingly demonstrated a synergistic disinfection effect.

[0267] Test 9: Bactericidal effect of modified water containing 4.9 ppm of free chlorine and 1.0 ppm of ozone on chlorine-resistant Methylobacterium in the presence of a medium concentration (mg / L order) of organic matter The bactericidal effects of the following three types of modified water against chlorine-resistant Methylobacterium were measured in the same manner as in Test 8. However, in Step 8, bovine serum albumin was added so that the final concentration was 20 mg / L. As a result, as shown in FIG. 24(b), the kill rate of chlorine-resistant Methylobacterium was 1.61 in the modified water containing 1.0 ppm ozone, and 1.64 in the modified water containing 4.9 ppm free chlorine. On the other hand, the modified water containing both 4.9 ppm free chlorine and 1.0 ppm ozone achieved a disinfection rate of 3.73. This effect was not merely the sum of the disinfection effects of exposure to either 4.9 ppm free chlorine or 1.0 ppm ozone alone, but surprisingly demonstrated a synergistic disinfection effect.

[0268] Test 10: Bactericidal effect of modified water containing 4.9 ppm of free chlorine and 2.9 ppm of ozone on chlorine-resistant Methylobacterium in the presence of a medium concentration (mg / L order) of organic matter The bactericidal effects of the following three types of modified water against chlorine-resistant Methylobacterium were measured in the same manner as in Test 8. However, in Step 8, bovine serum albumin was added so that the final concentration was 60 mg / L. As a result, as shown in FIG. 24(c), the kill rate of chlorine-resistant Methylobacterium was 2.23 in the modified water containing 2.9 ppm ozone, and 0.20 in the modified water containing 4.9 ppm free chlorine. On the other hand, the modified water containing both 4.9 ppm free chlorine and 2.9 ppm ozone achieved a disinfection rate of 3.88. This effect was not merely the sum of the disinfection effects of exposure to either 4.9 ppm free chlorine or 2.9 ppm ozone alone, but surprisingly demonstrated a synergistic disinfection effect.

[0269] Comparative Example 1: Bactericidal effect when modified water containing 0.1 ppm ozone and 0 to 0.75 ppm free chlorine was allowed to act on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in Figure 25(a), the kill rate of chlorine-resistant Methylobacterium was 0.0% in the modified water containing 0.1 ppm ozone and 10.6% in the modified water containing 0.375 ppm free chlorine. On the other hand, the kill rate was only 4.1% in the modified water containing both 0.1 ppm ozone and 0.375 ppm free chlorine, and no synergistic effect was observed. Furthermore, similarly to Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in Figure 25(b), the kill rate of chlorine-resistant Methylobacterium was 0.0% in the modified water containing 0.1 ppm ozone and 19.7% in the modified water containing 0.75 ppm free chlorine. On the other hand, the kill rate was only 18.1% in the modified water containing both 0.1 ppm ozone and 0.75 ppm free chlorine, and no synergistic effect was observed.

[0270] In the present invention, the concentration of ozone and the concentration of free chlorine contained in the modified water that exert a synergistic effect in killing chlorine-resistant Methylobacterium are expressed by the following formulas 1, 2, and 3, where y (ppm) is the latter and x (ppm) is the former: Formula 1:y≧4.1079e -18.35x Formula 2: 0.1≦y<5 formula 3:0 <x<3 It is preferable that all of the conditions expressed by the following formula (1) be satisfied. FIG. 26 visually shows the preferred ranges of ozone and free chlorine concentrations that satisfy all of Equations 1, 2, and 3 as areas surrounded by these equations.

[0271] <Step 9: Preparation of reagents to produce water containing hydrogen peroxide> Commercially available hydrogen peroxide solution (Fujifilm Wako Pure Chemical Industries, product number 081-04215) was diluted with pure water containing no free chlorine or ozone to adjust the concentration to a predetermined level.

[0272] Test 11: Bactericidal effect of modified water containing 1.5 ppm of free chlorine and 15 ppm of hydrogen peroxide on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, the kill rate of chlorine-resistant Methylobacterium was 13.9% in the modified water with 1.5 ppm of free chlorine, and 0.4% in the modified water with 15 ppm of hydrogen peroxide. On the other hand, the modified water containing both 1.5 ppm free chlorine and 15 ppm hydrogen peroxide achieved a disinfection rate of 27.9%. This effect was not merely the sum of the disinfection effects of exposure to either 1.5 ppm free chlorine or 15 ppm hydrogen peroxide alone, but surprisingly demonstrated a synergistic disinfection effect.

[0273] Test 12 (Comparative Example 2): Bactericidal effect of modified water containing 100 ppm hydrogen peroxide and 0.1 ppm ozone on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, the kill rate of chlorine-resistant Methylobacterium was 96.7% in the modified water with 100 ppm hydrogen peroxide, and 1.1% in the modified water with 0.1 ppm ozone. On the other hand, modified water containing both 100 ppm hydrogen peroxide and 0.1 ppm ozone achieved a disinfection rate of 35.6%, which was lower than the disinfection rate achieved by exposure to 100 ppm hydrogen peroxide alone.

[0274] Test Example II The following experiments demonstrate that the present invention has an exceptionally excellent inactivating effect on viruses.

[0275] Test 13: Inactivation effect of modified water containing 0.1 ppm ozone and 0.1 ppm free chlorine on Qβ phage <Step 10: Preparation of Qβ phage solution for testing> Qβ phage (NBRC20012) was purchased from the National Institute of Technology and Evaluation (NBRC). Next, according to JIS R 1706:2020, E. coli (NBRC106373) was infected with Qβ phage and cultured. The culture supernatant containing a high concentration of Qβ phage was filtered to obtain a Qβ phage solution. The infectivity titer of this Qβ phage solution was measured by plaque assay and found to be 1 x 10 11 The Qβ phage solution obtained was stored at -80°C, and when tested, it was thawed and diluted to 10 4 The Qβ phage solution was diluted 2-fold or used as is as is as the original solution without dilution as the test Qβ phage solution.

[0276] The free chlorine water obtained in step 5 and the ozone water obtained in step 7 were used alone or in combination to prepare three types of modified water containing only free chlorine, only ozone, and both free chlorine and ozone, specifically, 100 mL each of modified water containing 0.1 ppm ozone, 0.1 ppm free chlorine, and both 0.1 ppm ozone and 0.1 ppm free chlorine. Add 10 ml of 1 / 500 NB medium obtained in step 10 to each of the prepared modified waters. 4 1 mL of 1:1 diluted Qβ phage solution was added and mixed. In other words, Qβ phage was contacted with each modified water in the presence of a low concentration of organic matter. 1 mL of the reaction solution was sampled 10, 60, and 120 seconds after contact and neutralized by mixing with 0.1 mL of 1% sodium thiosulfate.

[0277] The stock solution of Qβ phage contains a very high concentration of organic matter because it contains LB medium components and contaminating proteins derived from E. coli. In Test 13, the stock solution of Qβ phage was 10 4 100-fold dilution, and then a further 100-fold dilution. Therefore, Test 13 can be considered to have been carried out in the presence of a low concentration of organic matter. Specifically, since the LB medium contains 15 g / L of organic matter, 4The organic matter concentration of the 1.5 mg / L Qβ phage solution diluted 100 times was 1.5 mg / L, and when this phage solution came into contact with the modified water, it was further diluted 100 times (1 mL / 100 mL), so the organic matter concentration at this point was 15 μg / L. Therefore, Test 13 can be considered to have been carried out in the presence of low concentrations (ng to μg / L order) of organic matter.

[0278] 1 mL of this neutralization solution was serially diluted, and the infectivity titer was measured according to JIS R 1706:2020 to calculate the residual rate relative to the control. The control was a neutralization solution prepared in the same manner as above, except that pure water was used instead of modified water. The pure water was obtained by purifying tap water using an ultrapure water production system (Milli-Q IQ7005, Merck).

[0279] As a result, as shown in Figure 27(a), when the contact time of each modified water was 10 seconds, the survival rate of Qβ phage was 39.5% in the modified water with 0.1 ppm ozone and 55.7% in the modified water with 0.1 ppm free chlorine. On the other hand, in the modified water containing both 0.1 ppm ozone and 0.1 ppm free chlorine, the residual rate was below the detection limit of 0.008%.

[0280] The above results confirmed that the virus inactivation effect of modified water containing both 0.1 ppm ozone and 0.1 ppm free chlorine is not merely the combined effect of the virus inactivation effects of modified water containing either 0.1 ppm ozone or 0.1 ppm free chlorine alone, but surprisingly has a synergistic effect. Furthermore, when a similar test was conducted using modified water containing only 0.2 ppm of free chlorine, the survival rate of Qβ phage was 74.8% when the contact time with the modified water was 10 seconds. This confirmed that combining ozone and free chlorine can advantageously improve the virus inactivation effect rather than increasing the concentration of free chlorine in modified water containing only free chlorine.

[0281] Test 14: Inactivation effect of modified water containing 0.05 ppm ozone and 0.5 ppm free chlorine on Qβ phage As in Test 13, modified water containing 0.05 ppm ozone, modified water containing 0.5 ppm free chlorine, and modified water containing both 0.05 ppm ozone and 0.5 ppm free chlorine were prepared, and each modified water was contacted with Qβ phage to measure the infectivity titer. As a result, as shown in Figure 27(b), when the contact time of each modified water was 10 seconds, the survival rate of Qβ phage was 36.4% in the modified water with 0.05 ppm ozone and 38.1% in the modified water with 0.5 ppm free chlorine. On the other hand, in the modified water containing both 0.05 ppm ozone and 0.5 ppm free chlorine, the residual rate was below the detection limit of 0.003%.

[0282] The above results confirmed that the virus inactivation effect of modified water containing both 0.05 ppm ozone and 0.5 ppm free chlorine is not merely the combined effect of the virus inactivation effects of modified water containing either 0.05 ppm ozone or 0.5 ppm free chlorine alone, but surprisingly has a synergistic effect. Furthermore, when a similar test was conducted using modified water containing only 0.6 ppm of free chlorine, the survival rate of Qβ phage was 24.8% when the contact time with the modified water was 10 seconds. This confirmed that combining ozone and free chlorine can advantageously improve the virus inactivation effect rather than increasing the concentration of free chlorine in modified water containing only free chlorine. Furthermore, when the Qβ phage was contacted with modified water containing only 0.5 ppm of free chlorine for 120 seconds, the survival rate was 0.003%, but this inactivation effect was equivalent to the inactivation effect when the modified water containing both 0.05 ppm of ozone and 0.5 ppm of free chlorine was contacted for only 10 seconds. This confirmed that the combination of free chlorine and ozone provides more than 10 times the immediate effect.

[0283] Test 15: Inactivation effect of modified water containing ozone and free chlorine on Qβ phage under test conditions with medium organic load (Test 15-1) Virus inactivation effect when contacted with modified water containing 0.3 ppm ozone and 2 ppm free chlorine for 20 seconds As in Test 13, free chlorine water and ozone water were prepared, and the resulting free chlorine water and ozone water were used alone or mixed to prepare three types of modified water containing only free chlorine, only ozone, and both free chlorine and ozone, specifically, modified water containing 0.3 ppm ozone, modified water containing 2 ppm free chlorine, and modified water containing both 0.3 ppm ozone and 2 ppm free chlorine, each 80 mL. While stirring each of the prepared modified waters, 0.12 mL of the stock solution of Qβ phage obtained in step 10 of Test 13 was added and mixed, and the Qβ phage was allowed to come into contact with each modified water for 20 seconds. As mentioned above, the Qβ phage stock solution contains LB medium components and contaminating proteins derived from E. coli, resulting in a very high concentration of organic matter, primarily 15 g / L of organic matter from LB medium components. Because 0.12 mL of phage solution was added to 80 mL of modified water, the phage solution was diluted 667-fold upon contact with the modified water, resulting in an organic matter concentration of 22.5 mg / L. Therefore, Test 15 can be considered to have been conducted in the presence of a moderate concentration (on the order of mg / L) of organic matter. After 20 seconds, 8 mL of 2% sodium thiosulfate was immediately added to neutralize the modified water. The infectivity titer of Qβ phage in this neutralized solution was measured in the same manner as in Test 13, and the residual rate relative to the control was calculated. As a control, a neutralized solution obtained in the same manner as above, except that pure water was used instead of modified water, was used.

[0284] As a result, as shown in FIG. 28(a), the survival rate of Qβ phage was 4.91% in the modified water with 0.3 ppm ozone and 103% in the modified water with 2 ppm free chlorine. On the other hand, in the modified water containing both 0.3 ppm ozone and 2 ppm free chlorine, the survival rate of Qβ phage was 0.02%. The above results confirmed that the virus inactivation effect of modified water containing both 0.3 ppm ozone and 2 ppm free chlorine is not merely the combined effect of the virus inactivation effects of modified water containing either 0.3 ppm ozone or 2 ppm free chlorine alone, but surprisingly has a synergistic effect.

[0285] (Test 15-2) Virus inactivation effect when contacted for 20 seconds with modified water containing 0.2 ppm ozone and 4.93 ppm free chlorine As in Test 15-1, three types of modified water containing only free chlorine, only ozone, or both free chlorine and ozone were prepared: modified water with 0.2 ppm ozone, modified water with 4.93 ppm free chlorine, and modified water containing both 0.2 ppm ozone and 4.93 ppm free chlorine. Each modified water containing organic matter was contacted with Qβ phage for 20 seconds. As a result, as shown in FIG. 28(b), the survival rate of Qβ phage was 59.2% in the modified water with 0.2 ppm ozone and 64.3% in the modified water with 4.93 ppm free chlorine. On the other hand, in the modified water containing both 0.2 ppm ozone and 4.93 ppm free chlorine, the survival rate of Qβ phage was 0.03%. The above results confirmed that the virus inactivation effect of modified water containing both 0.2 ppm ozone and 4.93 ppm free chlorine is not merely the combined effect of the virus inactivation effects of modified water containing either 0.2 ppm ozone or 4.93 ppm free chlorine alone, but surprisingly has a synergistic effect.

[0286] Test 16: Inactivation effect of modified water containing ozone and free chlorine on Qβ phage under test conditions including bovine serum albumin as an organic substance (Test 16-1) Virus inactivation effect when modified water containing 0.05 ppm ozone and 4.98 ppm free chlorine was contacted for 20 seconds As in Test 13, Qβ phage was contacted for 20 seconds with three types of modified water: modified water containing 0.05 ppm ozone, modified water containing 4.98 ppm free chlorine, and modified water containing both 0.05 ppm ozone and 4.98 ppm free chlorine. However, when 1 mL of the diluted Qβ phage solution obtained in step 10 was added to each modified water, BSA (bovine serum albumin (FV), Nacalai Tesque) was added and mixed together so that the final concentration in the resulting mixed solution was 80 mg / L. Therefore, Test 16-1 can be considered to have been carried out in the presence of a medium concentration (on the order of mg / L) of organic matter. As a result, the survival rate of Qβ phage was 71.1% in the modified water with 0.05 ppm ozone and 137% in the modified water with 4.98 ppm free chlorine. On the other hand, the residual rate for the modified water containing both 0.05 ppm ozone and 4.98 ppm free chlorine was 27.6%. The above results confirmed that the virus inactivation effect of modified water containing both 0.05 ppm ozone and 4.98 ppm free chlorine is not merely the combined effect of the virus inactivation effects of modified water containing either 0.05 ppm ozone or 4.98 ppm free chlorine alone, but surprisingly has a synergistic effect.

[0287] (Test 16-2) Virus inactivation effect when contacted for 20 seconds with modified water containing 1.98 ppm ozone and 0.1 ppm free chlorine As in Test 16-1, Qβ phage was exposed to three types of modified water for 20 seconds: modified water with 1.98 ppm ozone, modified water with 0.1 ppm free chlorine, and modified water containing both 1.98 ppm ozone and 0.1 ppm free chlorine. However, BSA was added to a final concentration of 320 mg / L. Therefore, Test 16-2 can be considered to have been conducted in the presence of a medium concentration (on the order of mg / L) of organic matter. As a result, the survival rate of Qβ phage was 6.6% in the modified water with 1.98 ppm ozone and 76.3% in the modified water with 0.1 ppm free chlorine. On the other hand, the residual rate in the modified water containing both 1.98 ppm ozone and 0.1 ppm free chlorine was 2.1%. The above results confirmed that the virus inactivation effect of modified water containing both 1.98 ppm ozone and 0.1 ppm free chlorine is not merely the combined effect of the virus inactivation effects of modified water containing either 1.98 ppm ozone or 0.1 ppm free chlorine alone, but surprisingly has a synergistic effect.

[0288] From the results obtained in Tests 13 to 16, the suitable concentrations of ozone and free chlorine contained in the modified water, which exhibit a synergistic effect of virus inactivation in the present invention, are expressed by the following formulas 1, 2, and 3, where the former is x (ppm) and the latter is y (ppm): Formula 1:y≧24.9e -55.17x Formula 2: 0.1≦y<5 Formula 3: 0.05≦x<2 It is preferable that all of the conditions expressed by the following formula (1) be satisfied. FIG. 29 visually shows the preferred ranges of ozone and free chlorine concentrations that satisfy all of Equations 1, 2, and 3 as areas surrounded by these equations.

[0289] The Qβ phage has an outermost shell made up of capsid protein and is commonly used in standard testing (ISO21072:2019) as a representative non-enveloped virus. In Test 16, the synergistic virus inactivation effect of modified water containing both free chlorine and ozone was confirmed, confirming that the action of modified water containing both free chlorine and ozone in the present invention is effective against non-enveloped viruses.

[0290] Test 17: Inactivation effect of modified water containing ozone and free chlorine on enveloped viruses (phi 6 phage) As in Test 16-1, bacteriophage was contacted for 20 seconds with three types of modified water: modified water containing 0.1 ppm ozone, modified water containing 0.5 ppm free chlorine, and modified water containing both 0.1 ppm ozone and 0.5 ppm free chlorine. However, in this test, φ6 phage (NBRC105899) was used instead of Qβ phage in step 10, and the host bacteria was Pseudomonas syringae (NBRC14084) was used. Then, 1 mL of the diluted φ6 phage solution obtained in step 10 was added to each modified water, and BSA was added and mixed together so that the final concentration in the resulting mixed solution would be 80 mg / L. Therefore, Test 17 can be considered to have been carried out in the presence of a medium concentration (on the order of mg / L) of organic matter. As a result, the survival rate of φ6 phage was 61.5% in the modified water with 0.1 ppm ozone and 0.0034% in the modified water with 0.5 ppm free chlorine. On the other hand, in the modified water containing both 0.1 ppm ozone and 0.5 ppm free chlorine, the residual rate was 0.00056%. The above results confirmed that the virus inactivation effect of modified water containing both 0.1 ppm ozone and 0.5 ppm free chlorine is not merely the combined effect of the virus inactivation effects of modified water containing either 0.1 ppm ozone or 0.5 ppm free chlorine alone, but surprisingly has a synergistic effect. The φ6 phage has a structure in which the outside of the capsid is covered with an envelope containing phospholipids (Biology and Chemistry, vol. 19, 140-147), and is a representative virus with an envelope. In Test 17, the synergistic virus inactivation effect of modified water containing both free chlorine and ozone was confirmed, confirming that the action of modified water containing both free chlorine and ozone in the present invention is also effective against enveloped viruses.

[0291] Test Example III The following experiments demonstrate that the present invention has an exceptionally excellent bactericidal effect against chlorine-resistant Methylobacterium in the presence of organic matter.

[0292] Test 18: The bactericidal effect of chlorine-resistant Methylobacterium in the presence of organic matter when first treated with water containing free chlorine as the first modified water, and then treated with water containing ozone as the second modified water while the water containing free chlorine remained. <Step 11: Adhesion of organic matter to ceramic tiles> As shown in Figure 30, a ceramic tile (area: 13 cm x 4 cm) with the same base and glaze layer as the PureRest toilet (TOTO Corporation), an aluminum tray, and a non-slip surface were set up, and the ceramic tile was placed at an angle inside the aluminum tray. R2A liquid medium diluted 1500 times was poured into an aluminum tray, a ceramic tile was partially immersed in it, and the tray was left standing at 50°C. After 24 hours, the liquid medium evaporated and the solid-liquid interface between the ceramic tile and the liquid medium dropped. In this way, the organic matter contained in the R2A liquid medium was attached to the solid-liquid interface (r) of the ceramic tile. Next, R2A liquid medium was poured in until the height was the same as before evaporation. The above procedure was repeated three times to prepare a ceramic tile (tile A) with organic matter adhering particularly to the solid-liquid interface region (r) (area: 1 cm × 4 cm).

[0293] <Step 12: Adhesion of chlorine-resistant Methylobacterium to tile A> The tile A prepared in step 11 and the aluminum tray excluding the anti-slip material were dry-heat sterilized at 180°C for 30 minutes. Next, chlorine-resistant Methylobacterium colonies were suspended in saline and 3 × 10 6 A bacterial solution of 100 cells / mL was prepared. The dry-heat sterilized tile A was placed horizontally in an aluminum tray with the side with the organic matter facing upwards, and after cooling to room temperature, the above bacterial solution was poured over tile A until it was fully submerged, and then left to stand for 24 hours. Next, tile A was removed, and sterilized purified water was poured over the entire surface of tile A to remove any excess chlorine-resistant Methylobacterium that had not adhered. By going through steps 11 and 12, a large amount of organic matter and chlorine-resistant Methylobacterium adheres, particularly to the solid-liquid interface (r). Therefore, the area where a large amount of this organic matter and chlorine-resistant Methylobacterium was attached was designated as area (R) (area: 1 cm × 4 cm). In this way, a ceramic tile (tile B) was obtained in which chlorine-resistant Methylobacterium was attached to the area (R) in the presence of organic matter.

[0294] <Step 13: Measurement of the bactericidal effect when chlorine-resistant Methylobacterium in the presence of organic matter is first subjected to the action of water containing free chlorine as the first modified water, and then, while the water containing free chlorine remains, the water containing ozone as the second modified water.>

[0295] According to steps 5 and 7, 200 mL of free chlorine water and ozone water were prepared. At this time, the quantitative result of the free chlorine concentration was 0.5 ppm, and the quantitative result of the ozone concentration was 0.7 ppm. Subsequently, the sterilization effect was measured according to the following conditions.

[0296] Condition 1-A A mesh rack was placed horizontally in an aluminum tray, and tile B obtained in step 12 was placed on the rack with the part (R) facing upward. Free chlorine water was poured onto the area (R) of tile B at a flow rate of 250 mL / min for 40 seconds. Immediately thereafter, that is, while droplets of free chlorine water remained on the site (R), ozone water was poured at a flow rate of 250 mL / min for 40 seconds. After spraying the ozone water, Tile B was left standing for 5 minutes to allow the active ingredient to act on the chlorine-resistant Methylobacterium in the presence of organic matter. After leaving it to stand, the swab part of the sampling kit (Fukitrail, Central Scientific Trading, collected liquid volume 10 mL) was used to measure the area (R) (area 4 cm 2 ) was wiped off and suspended in the recovery liquid. Next, 1 mL of the recovered solution was mixed with 0.1 mL of 1% sodium thiosulfate to neutralize it. The neutralized solution was then inoculated onto an R2A plate and cultured at 20°C for 7 days. The number of colonies that appeared was counted to quantify the number of viable chlorine-resistant Methylobacterium bacteria (N1 (cells)). As a control, the same procedure was carried out using sterilized purified water containing no active ingredient, and the viable cell count (N0 (cells)) was quantified. The sterilization rate was calculated using the following formula. Sterilization rate (%)=(N0-N1) / N0×100(%)

[0297] Condition 1-B Tile B obtained in step 12 was placed in an aluminum tray leaning at an angle of 60 degrees as shown in Figure 31, and then free chlorine water and ozone water were sprayed sequentially on area (R) of tile B, as in condition 1-A. After spraying the ozone water, Tile B was left standing for 5 minutes, and the number of live bacteria was quantified in the same manner as in Condition 1-A, and the sterilization rate was calculated.

[0298] Condition 2 In condition 1-B, after spraying free chlorine water on the area (R) of tile B, the tile B was shaken by hand to repeatedly shake off the free chlorine water from the area (R). After visually confirming that the free chlorine water had been removed from the area (R), ozone water was sprayed. After spraying the ozone water, Tile B was left standing for 5 minutes, and the number of live bacteria was quantified in the same manner as in Condition 1-A, and the sterilization rate was calculated.

[0299] As a result, as shown in Table 2, the kill rate of chlorine-resistant Methylobacterium under condition 2 was 76.6%. On the other hand, conditions 1-A and 1-B achieved even higher sterilization rates of 94.7% and 97.2%, respectively. This showed that by first supplying the first modified water, which is free chlorine water, and then supplying the second modified water, which is ozone water, while the first modified water remains, a high bactericidal effect can be achieved against chlorine-resistant Methylobacterium in the presence of organic matter.

[0300] [Table 2]

[0301] Test 19: Bactericidal effect of the first modified water and the second modified water when applied sequentially or simultaneously to chlorine-resistant Methylobacterium in the presence of organic matter Three types of water were prepared, each 200 mL: the free chlorine water obtained in step 5, the ozone water obtained in step 7, and modified water containing both free chlorine and ozone obtained by mixing these.

[0302] Condition 3 In the same manner as in Condition 1-B of Test 18, the first modified water was ozone water and the second modified water was free chlorine water, and these were applied to area (R) of tile B in that order, after which the number of live bacteria was quantified and the sterilization rate was calculated. Condition 4 The modified water obtained by mixing free chlorine water and ozone water was applied to the area (R) of tile B, i.e., the first modified water and the second modified water were applied simultaneously, and then the number of live bacteria was quantified and the sterilization rate was calculated.

[0303] As a result, as shown in Table 3, the kill rate of chlorine-resistant Methylobacterium under condition 4 was 55.3%. On the other hand, the kill rate of chlorine-resistant Methylobacterium under condition 3 was as high as 85.7%. In addition, in Table 3, the sterilization rate under condition 1-B of test 18 is shown again for ease of comparison. This shows that, although the bactericidal effect achieved by simultaneously ejecting the first modified water and the second modified water in the presence of organic matter is sufficient for practical purposes, ejecting the first modified water first rather than ejecting them simultaneously to pre-wash the organic matter, and then ejecting the second modified water, creates a greater synergistic effect due to the coexistence of the components contained in the first modified water and the components contained in the second modified water, thereby achieving a greater bactericidal effect against chlorine-resistant Methylobacterium in the presence of organic matter. In addition, the sterilization rate under condition 1-B was higher than that under condition 3, which indicated that a particularly high sterilization effect was achieved when the first modified water was free chlorine water.

[0304] [Table 3]

[0305] Test 20: Chlorine-resistant Methylobacterium in the presence of organic matter was first treated with water containing free chlorine as the first modified water, and then, with the free chlorine-containing water remaining, was treated with water containing ozone as the second modified water. The bactericidal effect was compared with the amount of water containing free chlorine remaining in the area (P) before the ozone-containing water was applied. <Step 14: Measurement of the amount of residual water of the first modified water remaining in the portion (P) after initially discharging water containing free chlorine as the first modified water to the chlorine-resistant Methylobacterium in the presence of organic matter and before discharging water containing ozone as the second modified water> In step 13, the weight [g] of tile B was measured before free chlorine water was poured onto the portion (R) of tile B. After the free chlorine water was poured on, and before the process of pouring ozone water on, the weight [g] of tile B with free chlorine water remaining on the portion (R) was measured. From the above weight and the area values of tile B and part (R), the residual amount of free chlorine water per area [mg / cm 2 ] was calculated. The weight was measured using a Mettler-Toledo electronic balance (model: PL602-S). Table 4 shows the relationship between the calculated residual water volume and the kill rate of chlorine-resistant Methylobacterium measured in the subsequent process. Here, the condition of residual water volume = 0 indicates the sterilization rate when free chlorine water is not poured and only ozone water is poured.

[0306] [Table 4]

[0307] From Table 4, the residual water content of the first modified water, free chlorine water, is at least 0.2 mg / cm 2 ] or more, it is the same as the condition where only ozone water was applied (residual water amount 0 [mg / cm 2 ]) and was confirmed to have a higher bactericidal effect. In addition, the residual water content of the first modified water, free chlorine water, is at least 1.0 mg / cm 2 ] or more, the sterilization rate is 96.0% or more, and it has been confirmed that an extremely high sterilization effect is achieved. Thus, it was shown that for chlorine-resistant Methylobacterium in the presence of organic matter, a high bactericidal effect is achieved by first applying water containing free chlorine as the first modified water, and then applying water containing ozone as the second modified water, if the remaining free chlorine water remains.

[0308] Test Example IV The following experiment demonstrates that the control having two modes, the first mode and the second mode (i.e., "occasional" control) of the present invention exhibits an exceptionally excellent bactericidal effect against chlorine-resistant Methylobacterium.

[0309] Test 21: In a toilet, water containing free chlorine was discharged after each use, and modified water, a mixture of free chlorine water and ozone water, was discharged once a day to check the bactericidal effect against chlorine-resistant Methylobacterium. <Step 1-1: Installation of equipment> Condition 1 The toilet used was a Neorest (TOTO Corporation) toilet with a built-in heated toilet seat and Washlet, installed in the women's restroom on the fourth floor of Research Building No. 3 at TOTO Corporation's General Research Institute (Honmura, Chigasaki City, Kanagawa Prefecture). This facility is equipped with a modified water generator that includes a Pt / IrO2 electrode. Tap water is passed through this modified water generator, and an electric current is applied to electrolyze it, producing water containing free chlorine (hereinafter referred to as "free chlorine water"). Furthermore, a modified water generator containing commercially available diamond electrodes was installed alongside this facility. By passing tap water through this modified water generator and applying an electric current to electrolyze it, water containing ozone (hereinafter referred to as "ozone water") can be produced. The reforming water generated by the two types of reforming water generating devices is discharged from a single discharge port after the respective reforming water supply pipes (7A, 7B) join together, as shown in FIG. 4.

[0310] <Step 1-2: Electrolysis of tap water to produce water containing free chlorine> Tap water was passed through the modified water generating device including the Pt / IrO2 electrode described above, and electrolysis was performed by applying an electric current to generate free chlorine water. 10 mL of this free chlorine water was dispensed into a water sampling bottle, and a single dose of free chlorine reagent for SWIFTEST (Hach) was added and mixed, and the free chlorine concentration in the free chlorine water was quantified using a pocket residual chlorine meter (Hach).

[0311] <Step 1-3: Electrolysis of tap water to produce ozone-containing water> Tap water was passed through the modified water generating device including the commercially available diamond electrode described above, and an electric current was applied to electrolyze the water, thereby generating ozone water. This ozone water was collected using an ozone concentration measurement kit (Ozone AccuVac Ampules HR pk25, Hach), set in a portable absorptiometer (DR1900, Hach), and the ozone concentration was quantified using the ozone concentration measurement mode.

[0312] <Step 1-4: Controlling the discharge of reforming water> Control IV-1: Control to discharge reformed water mixed with free chlorine water and ozone water (first mode) The toilet shown in Process 1-1 was manually controlled to discharge modified water, a mixture of free chlorine water and ozone water, from the discharge port onto the bowl surface of the toilet for 10 seconds (i.e., "simultaneous discharge") once a day between 8:30 and 9:00 a.m. during the test period. In this control, current was applied so that the free chlorine concentration and ozone concentration of the modified water discharged into the toilet were 1.0 ppm and 1.2 ppm, respectively.

[0313] Control IV-2: Free chlorine water discharge control (second mode) During the test period, the toilet shown in step 1-1 was controlled so that free chlorine water was discharged from the discharge part onto the bowl surface of the toilet for 10 seconds after each use by a user. During this control, an electric current was applied so that the free chlorine concentration of the free chlorine water discharged into the toilet was 1.0 ppm. The average number of uses during the test period was 15 times per day.

[0314] Condition 1 was set so that Control IV-1 and Control IV-2 were activated.

[0315] <Step 1-5: Quantifying the number of viable Methylobacterium bacteria naturally occurring on the surface of the toilet bowl> In the control set in step 1-4, one week and two weeks after the start of the test, the swab part of the sampling kit (Fukitrail, Central Scientific Trading, recovery volume 10 mL) was used to measure a part of the area (2 cm × 4 cm = 8 cm) from the water surface of the toilet bowl surface to a height of 2 cm. 2 The resulting pink colonies were counted and the viable count of Methylobacterium per swabbed area (N1 (cfu / cm)) was calculated. 2 )) was quantified (lower limit of quantification: 1.25 cfu / cm 2 ).

[0316] Condition 2 As in process 1-1, a toilet bowl, PureRest (TOTO Corporation), equipped with a heated toilet seat, Washlet Apricot (TOTO Corporation), was used in the men's restroom on the 5th floor of Research Building 3, General Research Institute, TOTO Corporation (Motomura, Chigasaki City, Kanagawa Prefecture). This facility is equipped with a modified water generator including a Pt / IrO2 electrode, and is capable of producing free chlorine water in the same manner as in step 1-2. In condition 2, control IV-2 in step 1-4 was activated. The average number of uses during the test period was 15 times per day. The viable cell count of Methylobacterium (N1 (cfu / cm)) was measured using the same procedure as in steps 1-5. 2 )) was quantified.

[0317] Table 5 shows a simple comparison between Control IV-1 and Control IV-2 under Conditions 1 and 2.

[0318] [Table 5]

[0319] Table 6 shows the viable count of Methylobacterium (cfu / cm) after the tests under conditions 1 and 2. 2 ) Quantitative results are shown.

[0320] [Table 6]

[0321] As shown in Table 6, the viable cell count of Methylobacterium after 2 weeks under condition 2 was 5.8 × 10 4 (cfu / cm 2 In condition 2, free chlorine water was sprayed, but the high number of viable Methylobacterium bacteria detected indicates that the detected Methylobacterium exhibits high resistance to free chlorine. On the other hand, the viable cell count of Methylobacterium after 2 weeks under condition 1 was 1.5 × 10 2 (cfu / cm 2 ) and showed a high bactericidal effect. This showed that even against chlorine-resistant Methylobacterium, which could not be sufficiently sterilized by discharging free chlorine water, a high sterilization effect was achieved by discharging modified water, which is a mixture of free chlorine water and ozone water, even if the discharge frequency was as low as once a day in the morning.

[0322] Test Example V The following experiment demonstrates that the variable CT value mode of the present invention has an exceptionally excellent bactericidal effect against chlorine-resistant Methylobacterium.

[0323] Test 22: After each use of a toilet, modified water containing a mixture of free chlorine water and ozone water was discharged for a short time, and then once a day, modified water containing a mixture of free chlorine water and ozone water was discharged for a long time. The bactericidal effect of this discharge on chlorine-resistant Methylobacterium and general bacteria was examined. <Step 1-1: Installation of equipment> Condition 1 The toilet used was a PureRest toilet (TOTO Corporation) equipped with a heated toilet seat Washlet Apricot (TOTO Corporation) in the women's restroom on the second floor of Research Building No. 3 at TOTO Corporation's General Research Institute (Motomura, Chigasaki City, Kanagawa Prefecture). This facility is equipped with a modified water generator that includes a Pt / IrO2 electrode. Tap water is passed through this modified water generator, and an electric current is applied to electrolyze it, producing water containing free chlorine (hereinafter referred to as "free chlorine water"). Furthermore, a modified water generator containing commercially available diamond electrodes was installed alongside this facility. By passing tap water through this modified water generator and applying an electric current to electrolyze it, water containing ozone (hereinafter referred to as "ozone water") can be produced. The reforming water generated by the two types of reforming water generating devices is discharged from a single discharge port after the respective reforming water supply pipes (7A, 7B) join together, as shown in FIG. 4.

[0324] <Step 1-2: Electrolysis of tap water to produce water containing free chlorine> Tap water was passed through the modified water generating device including the Pt / IrO2 electrode described above, and electrolysis was performed by applying an electric current to generate free chlorine water. 10 mL of this free chlorine water was dispensed into a water sampling bottle, and a single dose of free chlorine reagent for SWIFTEST (Hach) was added and mixed, and the free chlorine concentration in the free chlorine water was quantified using a pocket residual chlorine meter (Hach).

[0325] <Step 1-3: Electrolysis of tap water to produce ozone-containing water> Tap water was passed through the modified water generating device including the commercially available diamond electrode described above, and an electric current was applied to electrolyze the water, thereby generating ozone water. This ozone water was collected using an ozone concentration measurement kit (Ozone AccuVac Ampules HR pk25, Hach), set in a portable absorptiometer (DR1900, Hach), and the ozone concentration was quantified using the ozone concentration measurement mode.

[0326] <Step 1-4: Controlling the discharge of reforming water> Control V-1: Control that discharges modified water, a mixture of free chlorine water and ozone water, for a short time after each use. During the test period, the toilet shown in Process 1-1 was controlled so that modified water, a mixture of free chlorine water and ozone water, was discharged from the discharge port onto the bowl surface of the toilet for 10 seconds (i.e., "simultaneous discharge") after each use by a user. In this control, an electric current was applied so that the free chlorine concentration and ozone concentration of the modified water discharged into the toilet were 1.0 ppm and 0.35 ppm, respectively. The average number of uses during the test period was 15 times per day.

[0327] Control V-2: Control to discharge modified water, a mixture of free chlorine water and ozone water, once a day for a long period of time. During the test period, the toilet shown in Process 1-1 was controlled so that modified water, a mixture of free chlorine water and ozone water, was discharged from the discharge port onto the bowl surface of the toilet for 60 seconds (i.e., "simultaneous discharge") once every night between 1:00 and 2:00 a.m. during a time when no users were present. In this control, current was applied so that the free chlorine concentration and ozone concentration of the modified water discharged into the toilet were 1.0 ppm and 0.35 ppm, respectively.

[0328] Under condition 1, control V-1 and control V-2, which have different discharge times for the first and second reforming water, were activated, which corresponds to the variable CT value mode.

[0329] <Step 1-5: Quantifying the number of viable Methylobacterium bacteria naturally occurring on the surface of the toilet bowl> Using the controls set in steps 1-4, after 3 weeks from the start of the test, the swab part of the sampling kit (Fukitrail, Central Scientific Trading, recovery volume 10 mL) was used to measure a portion of the area (2 cm × 4 cm = 8 cm) from the water surface of the toilet bowl to a height of 2 cm. 2 The collected liquid was swabbed, mixed with the collected liquid, and plated on an R2A plate. The plate was then cultured at 20°C for 7 days. The number of pink colonies that appeared was counted, and the viable number of Methylobacterium bacteria per swabbed area (N1 (cfu / cm)) was calculated. 2 )) was quantified (lower limit of quantification: 1.25 cfu / cm 2 ).

[0330] <Step 1-6: Quantifying the number of naturally occurring common bacteria on the surface of the toilet bowl> A portion of the collected solution from steps 1-5 was inoculated onto an SMA plate and cultured at 35°C for 3 days. The number of colonies that appeared was counted, and the viable count of general bacteria per swabbed area (N2 (cfu / cm)) was calculated. 2 )) was quantified (lower limit of quantification: 1.25 cfu / cm 2 ).

[0331] Condition 2 As in process 1-1, a toilet bowl, PureRest (TOTO Corporation), equipped with a heated toilet seat, Washlet Apricot (TOTO Corporation), was used in the women's restroom on the second floor of Research Building No. 3, General Research Institute, TOTO Corporation (Motomura, Chigasaki City, Kanagawa Prefecture). As in condition 1, this facility has a built-in modified water generating device capable of generating free chlorine water, and is also equipped with a modified water generating device capable of generating ozone water, and is capable of discharging modified water that is a mixture of free chlorine water and ozone water. In condition 2, only control V-1 was activated. The viable cell counts of Methylobacterium and general bacteria (N1, N2 (cfu / cm)) were measured using the same procedures as in steps 1-5 and 1-6. 2 )) was quantified.

[0332] Condition 3 As in process 1-1, a toilet bowl, PureRest (TOTO Corporation), equipped with a heated toilet seat, Washlet Apricot (TOTO Corporation), was used in the women's restroom on the second floor of Research Building No. 3, General Research Institute, TOTO Corporation (Motomura, Chigasaki City, Kanagawa Prefecture). As in Condition 1, this facility is equipped with a modified water generator capable of generating free chlorine water and discharging the free chlorine water.

[0333] Control V-3: Control to discharge free chlorine water for a short time after each use During the test period, the toilet shown in step 1-1 was controlled so that free chlorine water was discharged from the discharge part onto the bowl surface of the toilet for 10 seconds after each use by a user. During this control, an electric current was applied so that the free chlorine concentration of the free chlorine water discharged into the toilet was 1.0 ppm. The average number of uses during the test period was 15 times per day. In condition 3, only control V-3 was activated. The viable cell counts of Methylobacterium and general bacteria (N1, N2 (cfu / cm)) were measured using the same procedures as in steps 1-5 and 1-6. 2 )) was quantified.

[0334] Table 7 shows a simple comparison of Control V-1, Control V-2, and Control V-3.

[0335] [Table 7]

[0336] Table 8 shows the quantitative results of the viable cell counts of Methylobacterium and general bacteria after tests under conditions 1, 2, and 3.

[0337] [Table 8]

[0338] As shown in Table 8, the viable counts of Methylobacterium and general bacteria under condition 3 were 1.2 × 10 3 , 1.0×10 5 (cfu / cm 2 In condition 3, free chlorine water was discharged for a short time after each use, but the number of live Methylobacterium bacteria detected was high, indicating that the detected Methylobacterium exhibits high resistance to free chlorine.

[0339] The viable counts of Methylobacterium and general bacteria under condition 2 were 8.1 x 10 2 , 3.4 × 10 2 (cfu / cm 2 In condition 2, a modified water mixture of free chlorine water and ozone water was discharged for a short time after each use, which showed a high inhibitory effect on general bacteria, while the viable count of Methylobacterium remained high.

[0340] Under these conditions, the viable counts of Methylobacterium and general bacteria under condition 1 were 1.3 x 10 1 , 2.2 × 10 2 (cfu / cm 2 In condition 1, modified water made by mixing free chlorine water and ozone water was discharged for a short time after each use, and modified water made by mixing free chlorine water and ozone water was discharged for a long time once every night, which showed a high bactericidal effect against both Methylobacterium and general bacteria.

[0341] In this way, it was confirmed that by varying the discharge time of the modified water, which is a mixture of free chlorine water and ozone water, depending on the situation, it is possible to efficiently suppress the growth of both general bacteria that are not chlorine-resistant and have a fast growth rate, and chlorine-resistant Methylobacterium that is chlorine-resistant and has a slow growth rate, while reducing the amount of ozone used.

[0342] Test 23: Bactericidal effect of modified water containing 0.1 ppm of free chlorine and 75 ppm of hydrogen peroxide on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in FIG. 32, the kill rate of chlorine-resistant Methylobacterium was 12.2% in the modified water containing 0.1 ppm of free chlorine, and 0.0% in the modified water containing 75 ppm of hydrogen peroxide. On the other hand, the modified water containing both 0.1 ppm free chlorine and 75 ppm hydrogen peroxide achieved a disinfection rate of 22.5%. This effect was not merely the sum of the disinfection effects of exposure to 0.1 ppm free chlorine or 75 ppm hydrogen peroxide alone, but surprisingly demonstrated a synergistic disinfection effect.

[0343] Test 24: Bactericidal effect of modified water containing 0.5 ppm of free chlorine and 75 ppm of hydrogen peroxide on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in FIG. 32, the kill rate of chlorine-resistant Methylobacterium was 0.0% in the modified water containing 0.5 ppm of free chlorine, and 0.0% in the modified water containing 75 ppm of hydrogen peroxide. On the other hand, the modified water containing both 0.5 ppm free chlorine and 75 ppm hydrogen peroxide achieved a disinfection rate of 19.7%. This effect was not merely the sum of the disinfection effects of exposure to 0.5 ppm free chlorine or 75 ppm hydrogen peroxide alone, but surprisingly demonstrated a synergistic disinfection effect.

[0344] Test 25: Bactericidal effect of modified water containing 1.5 ppm of free chlorine and 10 ppm of hydrogen peroxide on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in FIG. 32, the kill rate of chlorine-resistant Methylobacterium was 13.9% in the modified water containing 1.5 ppm of free chlorine, and 0.0% in the modified water containing 10 ppm of hydrogen peroxide. On the other hand, the modified water containing both 1.5 ppm free chlorine and 10 ppm hydrogen peroxide achieved a disinfection rate of 18.0%. This effect was not merely the sum of the disinfection effects of exposure to either 1.5 ppm free chlorine or 10 ppm hydrogen peroxide alone, but surprisingly demonstrated a synergistic disinfection effect.

[0345] Test 26: Bactericidal effect of modified water containing 1.0 ppm of free chlorine and 15 ppm of hydrogen peroxide on chlorine-resistant Methylobacterium As in Test 1, the disinfection rates of the following three types of modified water against chlorine-resistant Methylobacterium were calculated. As a result, as shown in FIG. 32, the kill rate of chlorine-resistant Methylobacterium was 0.0% in the modified water containing 1.0 ppm of free chlorine, and 0.4% in the modified water containing 15 ppm of hydrogen peroxide. On the other hand, the modified water containing both 1.0 ppm free chlorine and 15 ppm hydrogen peroxide achieved a disinfection rate of 24.1%. This effect was not merely the sum of the disinfection effects of exposure to either 1.0 ppm free chlorine or 15 ppm hydrogen peroxide alone, but surprisingly demonstrated a synergistic disinfection effect.

[0346] Test 27: Bactericidal effect of modified water containing 4.9 ppm of free chlorine and 0.5 ppm of hydrogen peroxide on chlorine-resistant Methylobacterium in the presence of a medium concentration (mg / L order) of organic matter The bactericidal effects of the following three types of modified water against chlorine-resistant Methylobacterium were measured in the same manner as in Test 8. However, in Step 8, bovine serum albumin was added so that the final concentration was 20 mg / L. As a result, as shown in FIG. 33, the kill rate of chlorine-resistant Methylobacterium was 7.2% in the modified water containing 4.9 ppm of free chlorine, and 0.0% in the modified water containing 0.5 ppm of hydrogen peroxide. On the other hand, the modified water containing both 4.9 ppm free chlorine and 0.5 ppm hydrogen peroxide achieved a disinfection rate of 31.1%. This effect was not merely the sum of the disinfection effects of exposure to either 4.9 ppm free chlorine or 0.5 ppm hydrogen peroxide alone, but surprisingly demonstrated a synergistic disinfection effect.

[0347] Test 28: Bactericidal effect of modified water containing 4.9 ppm of free chlorine and 2000 ppm of hydrogen peroxide on chlorine-resistant Methylobacterium in the presence of a medium concentration (mg / L order) of organic matter The bactericidal effects of the following three types of modified water against chlorine-resistant Methylobacterium were measured in the same manner as in Test 8. However, in Step 8, bovine serum albumin was added so that the final concentration in the resulting mixed solution was 20 mg / L. As a result, as shown in FIG. 33, the kill rate of chlorine-resistant Methylobacterium was 7.2% in the modified water containing 4.9 ppm of free chlorine, and 40.3% in the modified water containing 2000 ppm of hydrogen peroxide. On the other hand, the modified water containing both 4.9 ppm free chlorine and 2000 ppm hydrogen peroxide achieved a disinfection rate of 88.9%. This effect was not merely the sum of the disinfection effects of exposure to either 4.9 ppm free chlorine or 2000 ppm hydrogen peroxide alone, but surprisingly demonstrated a synergistic disinfection effect.

[0348] Test 29: Bactericidal effect of modified water containing 0.1 ppm of free chlorine and 4000 ppm of hydrogen peroxide on chlorine-resistant Methylobacterium in the presence of a medium concentration (mg / L order) of organic matter The bactericidal effect of the following three types of modified water against chlorine-resistant Methylobacterium was measured in the same manner as in Test 8. However, the bactericidal effect was calculated by subtracting the common logarithm of the number of remaining bacteria after exposure to the modified water from the common logarithm of the initial number of bacteria. In addition, in Step 8, bovine serum albumin was added so that the final concentration in the resulting mixed solution was 20 mg / L. As a result, as shown in FIG. 33, the bactericidal effect of chlorine-resistant Methylobacterium was 0.03 in the modified water containing 0.1 ppm of free chlorine, and 1.03 in the modified water containing 4000 ppm of hydrogen peroxide. On the other hand, the modified water containing both 0.1 ppm free chlorine and 4000 ppm hydrogen peroxide achieved a bactericidal effect of 2.05. This effect was not merely the sum of the bactericidal effects of exposure to 4.9 ppm free chlorine or 4000 ppm hydrogen peroxide alone, but surprisingly, it was a synergistic bactericidal effect.

[0349] Test 30: Bactericidal effect of modified water containing 4.9 ppm of free chlorine and 4000 ppm of hydrogen peroxide on chlorine-resistant Methylobacterium in the presence of a medium concentration (mg / L order) of organic matter The bactericidal effect of the following three types of modified water against chlorine-resistant Methylobacterium was measured in the same manner as in Test 8. However, the bactericidal effect was calculated by subtracting the common logarithm of the number of remaining bacteria after exposure to the modified water from the common logarithm of the initial number of bacteria. In addition, in Step 8, bovine serum albumin was added so that the final concentration in the resulting mixed solution was 20 mg / L. As a result, as shown in FIG. 33, the bactericidal effect of chlorine-resistant Methylobacterium was 0.03 in the modified water with 4.9 ppm of free chlorine and 1.03 in the modified water with 4000 ppm of hydrogen peroxide. On the other hand, the modified water containing both 4.9 ppm free chlorine and 4000 ppm hydrogen peroxide achieved a bactericidal effect of 4.05. This effect was not merely the sum of the bactericidal effects of exposure to either 4.9 ppm free chlorine or 4000 ppm hydrogen peroxide alone, but surprisingly demonstrated a synergistic bactericidal effect.

[0350] In the present invention, the concentration of hydrogen peroxide and the concentration of free chlorine contained in the modified water that exert a synergistic effect in killing chlorine-resistant Methylobacterium are expressed by the following formulas 4, 5, 6, and 8, where y (ppm) is the latter and x (ppm) is the former: Formula 4:y>-1.147ln(x)+4.105 {0.5≦x≦15} Formula 5:y>-0.559ln(x)+2.513 {15 <x≦75}Formula 6: 0.1≦y<5 Formula 7: x≦4000 It is preferable that all of the conditions expressed by the following formula (1) be satisfied. FIG. 34 visually shows the preferred ranges of hydrogen peroxide and free chlorine concentrations that satisfy all of Equations 4, 5, 6, and 7 as areas surrounded by these equations.

Claims

1. A facility in a building where tap water is used, The equipment in question is: a device for producing a first reformed water and a second reformed water; a pipe for supplying tap water to the device; a discharge unit for discharging the first modified water and the second modified water to a location where contamination by microorganisms or viruses is desired to be suppressed; A control unit; It is equipped with the first reforming water and the second reforming water are discharged simultaneously; The first reforming water and the second reforming water, when mixed together, have any one of the following compositions A, B, C, and D: A: Contains 0.05 ppm or more of ozone and 1.5 ppm or more of free chlorine; B: Contains 0.1 ppm or more of ozone and 0.75 ppm or more of free chlorine; C: Contains 0.2 ppm or more of ozone and 0.1 ppm or more of free chlorine; D: Contains 0.5 ppm or more of free chlorine and more than 15 ppm of hydrogen peroxide; The facility is characterized in that the signal is generated so that:

2. The facility according to claim 1 , wherein the first reformed water and the second reformed water are mixed and discharged simultaneously.

3. 3. The facility according to claim 2, wherein the first reformed water and the second reformed water have an upper limit of ozone concentration of 3 ppm in a mixed state.

4. 3. The facility according to claim 2, wherein the first reformed water and the second reformed water have an upper limit of a free chlorine concentration of 5 ppm in a mixed state.

5. 4. The facility according to claim 3, wherein the first reformed water and the second reformed water have an upper limit of a free chlorine concentration of 5 ppm in a mixed state.

6. The facility according to any one of claims 1 to 5, further comprising a temperature control unit.

7. The equipment according to any one of claims 1 to 5, wherein the discharge section discharges the first modified water and the second modified water in the form of granules having a particle size of 10 μm or more, in the form of a shower, or in a flowing state.

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