Water supply system

Abstract

Providing technology to treat raw water and obtain treated water with a certain level of quality. [Solution] The water supply system 100 disclosed herein comprises a water intake device 110, a first purification device 120, a first storage tank 130, an ozone supply device 140, a first inspection device 150, and a control device 160. The water intake device 110 takes in raw water. The first purification device 120 purifies the raw water taken in by the water intake device 110. The first storage tank 130 stores the treated water purified by the first purification device 120. The ozone supply device 140 supplies ozone to the treated water stored in the first storage tank 130. The first inspection device 150 inspects the water quality of the treated water stored in the first storage tank 130. The control device 160 is configured to perform an adjustment process to adjust the amount of ozone supplied by the ozone supply device 140 based on the inspection results obtained by the first inspection device 150.

Description

Technical Field

[0001] The present disclosure relates to a water supply system.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2018-185956 discloses a hydrogen power generation and drinking water supply system having a hydrogen generation device and a drinking water supply device. In this system, the hydrogen generation device has a secondary battery and a hydrogen production device that reacts water to produce hydrogen. The drinking water supply device has a fuel cell, a hydrogen storage device, a water treatment device, and a water collection device that supplies water to the hydrogen production device and / or the water treatment device. The water collection device has an adsorbent that adsorbs moisture contained in the outside air or a collector that collects moisture, and a water collection tank that receives the water adsorbed / collected by the adsorbent or the collector. The publication describes that with such a configuration, it is possible to generate electricity and supply drinking water alone, without requiring a commercial power supply, and to stably supply electric power and drinking water over a long period of time.

[0003] The mobile power generator disclosed in Japanese Patent Publication No. 2001-35503 comprises a self-propelled vehicle, a container, and a power generation device. The container consists of multiple exterior wall panels and a panel mounting structure to which the multiple exterior wall panels are attached, and is mounted on the cargo bed of the self-propelled vehicle. The power generation device is located inside the container. The panel mounting structure is configured to allow some or all of the multiple exterior wall panels to be exposed to sunlight when the power generation device is in operation. The solar cell panels are mounted on the light-receiving surfaces of the exterior wall panels that are exposed to sunlight. The power generation device used is a fuel cell type power generation device equipped with a water electrolysis tank and a fuel cell that generates electricity using the hydrogen and oxygen produced by the water electrolysis tank as fuel. A power supply control device is located inside the container to control the supply of electricity generated by the solar cell panels to the load. The power supply control device is configured to supply electricity generated by the solar cell panels to at least the water electrolysis tank. The publication states that, with this configuration, the water electrolysis tank can be operated using electricity supplied from solar panels, and therefore, there is no need to use a power generation device driven by an internal combustion engine as the power source for the water electrolysis tank.

[0004] The hydrogen generation system disclosed in Japanese Patent Publication No. 2022-124322 comprises a pure water generation means for generating pure water from raw water, a hydrogen generation means for generating hydrogen from the pure water generated by the pure water generation means, and a hydrogen storage means for storing the hydrogen generated by the hydrogen generation means. The publication states that hydrogen can be generated from raw water with this configuration. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2018-185956 [Patent Document 2] Japanese Patent Publication No. 2001-35503 [Patent Document 3] Japanese Patent Publication No. 2022-124322 [Overview of the project] [Problems that the invention aims to solve]

[0006] The inventors of this invention want to treat raw water and obtain treated water with a certain level of water quality. [Means for solving the problem]

[0007] The water supply system disclosed herein comprises a water intake device, a first purification device, a first storage tank, an ozone supply device, a first inspection device, and a control device. The water intake device takes in raw water. The first purification device purifies the raw water taken in by the water intake device. The first storage tank stores the treated water purified by the first purification device. The ozone supply device supplies ozone to the treated water stored in the first storage tank. The first inspection device inspects the water quality of the treated water stored in the first storage tank. The control device is configured to perform an adjustment process to adjust the amount of ozone supplied by the ozone supply device based on the inspection results obtained by the first inspection device. With this configuration, raw water can be treated and treated water of a certain quality can be obtained. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a block diagram of the water supply system 100. [Figure 2] Figure 2 is a block diagram of the water supply system 100. [Figure 3] Figure 3 is a flowchart of system 100. [Figure 4] Figure 4 is a block diagram of the water supply system 200. [Figure 5] Figure 5 is a block diagram of the water supply system 200. [Figure 6] Figure 6 is a flowchart of system 200. [Figure 7] Figure 7 is a block diagram of the water supply system 300. [Figure 8]Figure 8 is a flowchart of system 300. [Figure 9] Figure 9 is a block diagram of the ozone supply device 540. [Modes for carrying out the invention]

[0009] The embodiments of the technology disclosed herein will be described below. Matters other than those specifically mentioned herein that are necessary for carrying out the technology disclosed herein can be understood based on the technical content taught herein and the common technical knowledge of those skilled in the art. The technology disclosed herein can be carried out based on the content disclosed herein and the common technical knowledge of the art. The A-B (A and B are arbitrary numbers) designations in this specification and the claims mean A or greater and B or less, and also include the case where A is greater than B and B is less than A.

[0010] <First Embodiment> Figures 1 and 2 are block diagrams of the water supply system 100. Figure 1 shows the various devices included in the water supply system 100 according to the first embodiment (hereinafter also simply referred to as "system 100"). Figure 2 shows the various functional blocks included in each device of system 100. As shown in Figures 1 and 2, system 100 includes a water intake device 110, a first purification device 120, a first storage tank 130, an ozone supply device 140, a first inspection device 150, and a control device 160.

[0011] As shown in Figure 2, the supply source 1, the water intake device 110, the first purification device 120, and the first storage tank 130 are interconnected by pipes 190A, 190B, and 190C.

[0012] The water intake device 110 is, in this context, a device for taking in raw water. The water intake device 110 consists of, for example, a device equipped with a pump. In this specification, "raw water" means naturally occurring, untreated water. Raw water can be, for example, dam water, rainwater, lake water, river water, well water, spring water, groundwater, seawater, etc. As shown in Figure 2, the water intake device 110 is connected to the supply source 1 by piping 190A. The supply source 1 is, in this context, the source of raw water. The supply source 1 is not particularly limited as long as it is a source of raw water, and may be, for example, a swimming pool, reservoir, dam, lake, river, well, sea, etc. As shown in Figure 2, a valve 2 is provided in piping 190A between the supply source 1 and the water intake device 110. The valve 2 is, for example, a valve that switches the supply of raw water from the supply source 1 to the water intake device 110 on and off. As shown in Figure 2, the water intake device 110 is connected to the first purification device 120 downstream by piping 190B. In this embodiment, a flow meter 3 is provided in piping 190B between the water intake device 110 and the first purification device 120. The flow meter 3 is a measuring instrument that measures the flow rate of raw water in piping 190B (the amount of raw water supplied to the first purification device 120).

[0013] The first purification device 120 is a device that purifies the raw water taken in by the water intake device 110. The first purification device 120 should be of an appropriate type depending on the type of raw water, the desired water quality for the first treated water, etc. The first purification device 120 may consist of a water purification device equipped with filter media such as sand, manganese sand, gravel, garnet, activated carbon, anthracite, ceramic, microfiltration membrane, ultrafiltration membrane, reverse osmosis membrane (RO membrane), spool filter, or nonwoven fabric. In particular, from the viewpoint of producing water of higher quality, the first purification device 120 is preferably a water purification device equipped with an RO membrane. In the configuration shown in Figure 2, the first purification device 120 is connected to the first storage tank 130 downstream by piping 190C.

[0014] The first storage tank 130 is here configured by a device including a storage tank for storing the treated water purified by the first purification device 120. In this embodiment, the first ozone supply unit 141 of the ozone supply device 140 described later is arranged in the first storage tank 130. Preferably, for example, a sensor for detecting the storage amount of the treated water is provided in the first storage tank 130.

[0015] In the form shown in FIG. 2, the system 100 further includes a discharge valve 4. The discharge valve 4 is, for example, a valve for discharging the treated water stored in the first storage tank 130. In this embodiment, the discharge valve 4 is provided in a pipe 5 connected to the first storage tank 130.

[0016] The ozone supply device 140 is here a device for supplying ozone to the treated water stored in the first storage tank 130. As shown in FIG. 2, the ozone supply device 140 includes a first ozone supply unit 141, an ozone generation unit 142, an oxygen supply unit 143, a first ozone supply path 144, and a valve 145.

[0017] The first ozone supply unit 141 is, for example, a functional block for supplying ozone to the treated water stored in the first storage tank 130. The first ozone supply unit 141 is, for example, connected to one end of the first ozone supply path 144 and arranged in the first storage tank 130. Preferably, the first ozone supply unit 141 is immersed in the treated water. As the first ozone supply unit 141, any member used for this kind of application can be used without particular limitation as long as it can supply ozone to the treated water stored in the first storage tank 130. The first ozone supply unit 141 may be, for example, a nozzle.

[0018] The first ozone supply unit 141 is preferably made of a porous material. The porous material preferably has a plurality of pores that generate fine ozone bubbles with an average bubble diameter of less than 150 μm. In this specification, "fine bubbles" may include fine bubbles. Fine bubbles are defined by the International Organization for Standardization (ISO) standard (ISO20480-1:2017) as bubbles with a diameter of less than 100 μm. Fine bubbles include microbubbles and ultrafine bubbles. Microbubbles are defined by the above standard as bubbles with a diameter of 1 μm or more and less than 100 μm. Ultrafine bubbles are defined by the above standard as bubbles with a diameter of less than 1 μm.

[0019] In this specification, "microbubbles" refers to bubbles with an average bubble diameter of 150 μm or less (preferably 130 μm or less, more preferably 120 μm or less, even more preferably 110 μm or less, and particularly preferably 100 μm or less). The average bubble diameter is generally 10 nm or more, for example 100 nm or more, and may be 1 μm or more, 10 μm or more, or 50 μm or more. In this specification, "average bubble diameter" refers to the bubble diameter (D) calculated by randomly selecting 100 to 500 bubbles (for example 200 to 300 bubbles) from images acquired using a commercially available digital imaging device (for example, a high-speed camera) and analyzing them using "ImageJ," a free image analysis software developed by the National Institutes of Health in the United States, where the cumulative value of the bubbles with the smallest diameters is 50%. 50 It refers to the diameter.

[0020] In this embodiment, the porous body may be hollow cylindrical. For example, the first ozone supply channel 144 may be connected to the inside of the porous body so that ozone is supplied to the inside. The ozone supplied to the inside of the porous body is released from the inside to the outside of the porous body into the treated water through the pores. As a result, ozone bubbles are generated from the outer surface of the porous body.

[0021] The average pore diameter of the porous material is set appropriately according to the desired diameter of the microbubbles and is not particularly limited. The average pore diameter is generally 0.05 μm to 20 μm, for example 0.1 μm to 15 μm, preferably 0.3 μm to 10 μm, more preferably 0.5 μm to 7 μm, and even more preferably 1 μm to 5 μm. The average pore diameter is measured, for example, by the mercury intrusion method using a mercury porosimeter. A commercially available conventionally known device can be used as the mercury porosimeter, one example being the "AutoPore IV 9500" manufactured by Micrometrics. The manufacturer's nominal value may be used as the average pore diameter.

[0022] As the porous material, it is preferable to use a porous material made of a material that is resistant to corrosion and deterioration by ozone. The porous material may be made of ceramic, for example. Examples of ceramics that make up the porous material include oxide-based ceramics such as alumina, zirconia, magnesia, silica, titania, zircon, and mullite; and non-oxide-based ceramics such as silicon nitride, boron nitride, aluminum nitride, silicon carbide, and boron carbonitride.

[0023] The ozone generating unit 142 is, for example, a functional block that generates ozone. In this embodiment, the ozone generating unit 142 is preferably configured to convert oxygen supplied from the oxygen supply unit 143 into ozone. For this reason, the ozone generating unit 142 may include, for example, a device (ozone generator) that generates ozone using oxygen as a raw material. As the ozone generator which is the ozone generating unit 142, for example, a commercially available ozone generator used for this type of application can be used without particular limitation. In this embodiment, the ozone obtained by the ozone generating unit 142 is temporarily stored in an ozone tank (not shown).

[0024] The oxygen supply unit 143 is a functional block that supplies oxygen to the ozone generation unit 142, for example. The oxygen supply unit 143 may include, for example, an oxygen cylinder. Alternatively, from the viewpoint of realizing a stable supply of ozone by the ozone supply device 140, it is preferable that the oxygen supply unit 143 is an oxygen concentrator that concentrates oxygen in the air. As the oxygen concentrator that is the oxygen supply unit 143, for example, a commercially available oxygen concentrator used for this type of application can be used without particular limitation.

[0025] The first ozone supply path 144 is, for example, the ozone flow path when supplying ozone from the ozone supply device 140 to the first storage tank 130. In this embodiment, the first ozone supply path 144 extends from the ozone generation unit 142 to the first ozone supply unit 141. The valve 145 switches the ozone supply from the ozone generation unit 142 to the first ozone supply unit 141 on or off, for example. As shown in Figure 2, the valve 145 is provided in the first ozone supply path 144.

[0026] The first inspection device 150 is preferably configured to include a device for inspecting the water quality of the treated water stored in the first storage tank 130. The first inspection device 150 may, for example, be equipped with various water quality testing devices used for this type of application, without any particular limitations, depending on the desired level of water quality. In this embodiment, the first inspection device 150 inspects the water quality of the treated water with respect to various test items, for example. Such test items are not particularly limited and may be set appropriately according to, for example, the desired application of the treated water, the desired level of water quality, etc. Examples of test items include turbidity, color, pH, conductivity, hardness, presence or absence of general bacteria, presence or absence of E. coli, nitrate nitrogen and nitrite nitrogen concentrations, organic compound concentrations, heavy metal ion concentrations, residual chlorine concentrations, etc.

[0027] The control device 160 is, for example, a device that controls the operation of each device and part in the system 100. In this embodiment, the control device 160 includes a controller (e.g., a CPU) that is in charge of various controls, and a storage device that stores programs and data. The control device 160 includes, for example, a detection unit, an instruction unit, an acquisition unit, an adjustment unit, a data storage unit, a map information storage unit, and a determination unit. The control device 160 further includes other functional blocks not mentioned herein that are necessary for the operation of the device.

[0028] The detection unit is a functional block that acquires information detected by various sensors provided in the system 100. In this embodiment, the detection unit is configured to acquire information from the flow meter 3 and various sensors (not shown). The instruction unit is a functional block that instructs the operation of each device and part in the system 100. In this embodiment, the instruction unit is configured to instruct the on / off operation of each device and part, the opening and closing of each valve, and the adjustment of the opening degree of each valve.

[0029] The acquisition unit is a functional block that acquires, for example, the inspection results obtained by the first inspection device 150. In this embodiment, the acquisition unit is configured to acquire, for example, the inspection results obtained before supplying ozone and the inspection results obtained after supplying ozone for the treated water stored in the first storage tank 130. The adjustment unit is a functional block that adjusts, for example, the amount of ozone supplied by the ozone supply device 140. In this embodiment, the adjustment unit is configured to adjust the amount of ozone supplied by the ozone supply device 140 according to the water quality of the treated water stored in the first storage tank 130, based on the inspection results obtained by the first inspection device 150. The adjustment unit may be configured to refer to, for example, the inspection results stored in the data storage unit (described later) and the map stored in the map information storage unit.

[0030] The data storage unit is a functional block that stores, for example, the inspection results obtained by the first inspection device 150. In this embodiment, the data storage unit is configured to temporarily store, for the treated water stored in the first storage tank 130, the inspection results obtained before supplying ozone and the inspection results obtained after supplying ozone.

[0031] The map information storage unit stores a map configured to perform an adjustment process that adjusts the amount of ozone supplied by the ozone supply device 140 according to the water quality of the treated water. The map records, for example, the relationship between water quality and the amount of ozone supplied. The map also records, for example, the correlation between the concentration of substance X (including bacteria; the same applies hereinafter) to be removed in the treated water and the amount of ozone required to remove (sterilize, decompose, etc.) substance X at that concentration. It is preferable that the map information storage unit stores such a map for each substance X to be removed.

[0032] The determination unit is a functional block that determines, for example, whether the treated water stored in the first storage tank 130 meets a predetermined water quality based on the inspection results obtained by the first inspection device 150.

[0033] In the configurations shown in Figures 1 and 2, the system 100 further comprises a power storage device 170 and a power generation device 180. The power storage device 170 stores, for example, the power needed to operate the system 100. In this embodiment, the power storage device 170 stores the power generated by the power generation device 180. The power storage device 170 is not limited to, but may be, for example, a lithium-ion secondary battery.

[0034] The power generation device 180 generates electricity, for example, to operate the system 100. The power generation device 180 may include, for example, a power generation device that utilizes renewable energy. In this embodiment, the power generation device 180 includes a photocell equipped with a solar panel. In addition, the power generation device 180 may include other batteries, in addition to, for example, a power generation device that utilizes renewable energy (e.g., a photocell), so that the power generation device 180 can generate electricity even during periods when the solar panel does not receive sunlight. This will be discussed further later.

[0035] Figure 3 is a flowchart of system 100. The control flow of system 100 will be explained below, with reference to Figures 1 to 3 as appropriate. For example, before executing the control flow shown in Figure 3, it is preferable to generate power for operating system 100 using the power generator 180 and store it in the energy storage device 170. Although not particularly limited, it is preferable to maintain a state in which power is generated using the power generator 180 and the obtained power is stored in the energy storage device 170, not only before executing the control flow but also while system 100 is in operation. Before executing the control flow, it is preferable to confirm that each valve is in the closed state. Once the above preparations are complete, execute the control flow shown in Figure 3 (START).

[0036] As shown in Figure 3, water intake is performed (step S11). During water intake, for example, the water intake device 110 takes in raw water. In the configuration shown in Figure 2, the valve 2 is opened and the switch of the water intake device 110 is turned on to take in raw water from the supply source 1. The raw water taken in by the water intake device 110 is then sent to the first purification device 120 via the pipe 190A. Information regarding the flow rate of the raw water in the pipe 190A is measured by the flow meter 3 and acquired by the detection unit of the control device 160. Based on the information acquired by the detection unit, the instruction unit of the control device 160 can instruct the opening or closing or degree of opening of the valve 2, the output of the water intake device 110, etc.

[0037] Next, the first purification treatment is performed (step S12). In the first purification treatment, the first purification device 120 purifies, for example, the raw water taken in by the intake device 110 during water intake. In the configuration shown in Figure 2, the raw water is sent to the first purification device 120 via piping 190B and purified by the device. The treated water purified by the first purification device 120 is sent to the first storage tank 130 via piping 190C. Although not particularly limited, for example, information regarding the amount of treated water stored in the first storage tank 130 is measured by a sensor installed in the first storage tank 130 and acquired by the detection unit of the control device 160. Based on the information acquired by the detection unit, the instruction unit of the control device 160 may instruct, for example, the opening or closing or degree of opening of valve 2, the output of the intake device 110, etc. For example, if the detection unit obtains information that the amount of treated water stored in the first storage tank 130 has reached its maximum, the instruction unit may close the valve 2 and stop the output of the water intake device 110.

[0038] Next, an inspection is performed (step S13). During the inspection, for example, the first inspection device 150 inspects the water quality of the treated water stored in the first storage tank 130. In this embodiment, depending on the desired use of the treated water, the desired level of water quality, etc., the first inspection device 150 inspects the water quality of the treated water for various inspection items. The inspection results obtained by the first inspection device 150 are acquired by the acquisition unit of the control device 160 and stored in the data storage unit.

[0039] Next, an adjustment process is performed (step S14). In the adjustment process, the control device 160 adjusts the amount of ozone supplied by the ozone supply device 140 based on the inspection results obtained by the first inspection device 150, for example. In this embodiment, the adjustment unit of the control device 160 adjusts the amount of ozone supplied by the ozone supply device 140 according to the water quality of the treated water stored in the first storage tank 130, based on the inspection results obtained by the first inspection device 150. The control device 160 (here, the adjustment unit) may perform the above adjustment while referring, for example, to the inspection results stored in the data storage unit and the map stored in the map information storage unit.

[0040] Next, ozone supply is performed (step S15). In ozone supply, the ozone supply device 140 supplies ozone to the treated water stored in the first storage tank 130. In this embodiment, the ozone supply device 140 supplies the treated water stored in the first storage tank 130 with a supply amount of ozone adjusted by the adjustment process. In the configuration shown in Figure 2, the indicator unit of the control device 160 opens the valve 145 and supplies ozone obtained in the ozone generation unit 142 (for example, ozone stored in the ozone tank mentioned above) to the first storage tank 130 via the first ozone supply passage 144.

[0041] Next, an inspection is performed (step S16). In the inspection of step S16, for example, the first inspection device 150 inspects the water quality of the treated water stored in the first storage tank 130 after ozone supply. In this embodiment, the inspection is performed for the items in the inspection of step S13. At this time, the inspection results obtained by the first inspection device 150 are acquired by the acquisition unit of the control device 160 and stored in the data storage unit. The inspection results obtained by the first inspection device 150 are acquired by the acquisition unit of the control device 160 and stored in the data storage unit.

[0042] Next, a determination is made (step S17). In the determination, for example, the determination unit of the control device 160 determines whether the treated water stored in the first storage tank 130 after ozone supply can be released, based on the inspection results obtained by the first inspection device 150. In the configuration shown in Figure 3, if the determination is made that it can be released (Yes), the treated water stored in the first storage tank 130 is judged to be of a predetermined quality, and the control flow ends (END). In this case, the instruction unit of the control device 160 may open the release valve 4 and release the treated water stored in the first storage tank 130. On the other hand, if the determination is not made that it can be released (No), the control flow returns to step S14 and repeats the subsequent steps.

[0043] As described above, the system 100 according to this embodiment includes a water intake device 110, a first purification device 120, a first storage tank 130, an ozone supply device 140, a first inspection device 150, and a control device 160. The water intake device 110 takes in raw water. The first purification device 120 purifies the raw water taken in by the water intake device 110. The first storage tank 130 stores the treated water purified by the first purification device 120. The ozone supply device 140 supplies ozone to the treated water stored in the first storage tank 130. The first inspection device 150 inspects the water quality of the treated water stored in the first storage tank 130. The control device 160 is configured to perform an adjustment process to adjust the amount of ozone supplied by the ozone supply device 140 based on the inspection results obtained by the first inspection device 150.

[0044] In system 100, the control device 160 is configured to perform an adjustment process to adjust the amount of ozone supplied by the ozone supply device 140 based on the inspection results obtained by the first inspection device 150. This allows the ozone supply to be adjusted to obtain a certain level of treated water (for example, water of a desired quality) according to the water quality of the treated water stored in the first storage tank 130 (in this case, water after purification by the first purification device 120). Therefore, system 100 can treat raw water and obtain treated water of a certain level of quality. Furthermore, by performing the adjustment process, it is possible to prevent the use of an excessive amount of ozone to obtain treated water of a certain level of quality. This allows, for example, to obtain more treated water of a certain level of quality. This is preferable, for example, when a larger amount of treated water of a certain level of quality is required during times or situations when resources and energy are scarce, such as during a disaster.

[0045] The system 100 may further include a discharge valve 4 for releasing treated water stored in the first storage tank 130. In this case, the control device 160 may be configured to open the discharge valve 4 when the treated water stored in the first storage tank 130 meets a predetermined water quality based on the inspection results obtained by the first inspection device 150. This allows for the release of treated water at a certain level of quality.

[0046] The ozone supply device 140 may have a porous body (here, the first ozone supply unit 141) having multiple pores that generate fine ozone bubbles with an average bubble diameter of less than 150 μm. The porous body (here, the first ozone supply unit 141) may be placed inside the first storage tank 130. This allows fine ozone bubbles to be supplied to the treated water stored in the first storage tank 130. The fine ozone bubbles can more efficiently sterilize the treated water and decompose chemical substances in the treated water.

[0047] The porous body (here, the first ozone supply unit 141) may have multiple pores capable of releasing ozone bubbles with an average bubble diameter of 10 nm to 100 μm. By using a porous body capable of releasing ozone bubbles of such an average bubble diameter, the sterilization effect and chemical decomposition effect of the treated water can be achieved more efficiently. Furthermore, it is possible to suppress the supply of an excessive amount of ozone at once.

[0048] The ozone supply device 140 may be configured to generate ozone using oxygen from the air. In such a configuration, sufficient oxygen for ozone generation can be obtained because oxygen from the air is used. Furthermore, such a configuration allows for a simpler system 100.

[0049] The system 100 may further include a power generator 180 and a power storage device 170 for storing the power generated by the power generator 180. This allows the system 100 to be self-sufficient in the power necessary to implement the control flow. Furthermore, if necessary, it can acquire and store power used for purposes other than implementing the control flow of the system 100. This effect is particularly desirable in situations prone to power shortages, such as during disasters.

[0050] <Second Embodiment> Figures 4 and 5 are block diagrams of the water supply system 200. Figure 4 shows the various devices included in the water supply system 200 according to the second embodiment (hereinafter also simply referred to as "system 200"). Figure 5 shows the various functional blocks included in each device of system 200. As shown in Figures 4 and 5, system 200 includes a water intake device 110, a first purification device 120, a first storage tank 130, a second storage tank 230, an ozone supply device 240, a first inspection device 150, a second inspection device 250, and a control device 260. The water intake device 110, the first purification device 120, the first storage tank 130, and the first inspection device 150 were described in the first embodiment, so their description is omitted here.

[0051] In the configurations shown in Figures 4 and 5, the system 200 further comprises a power storage device 170 and a power generation device 180. The power storage device 170 and the power generation device 180 were described in the first embodiment and will not be described here. As shown in Figure 5, the system 200 further comprises a valve 2, a flow meter 3, a discharge valve 4, and piping 5. These were described in the first embodiment and will not be described here. While not particularly limited, a pump may be provided in the piping 5 as needed.

[0052] The second storage tank 230 is comprised of a device that includes a storage tank for storing treated water discharged from the first storage tank 130. In the configuration shown in Figure 5, the second storage tank 230 is connected to the piping 5. Therefore, when the discharge valve 4 provided in the piping 5 is opened, the treated water discharged from the first storage tank 130 flows into the second storage tank 230 via the piping 5. As shown in Figure 5, the second storage tank 230 is equipped with the second ozone supply unit 241 of the ozone supply device 240, which will be described later. Preferably, the second storage tank 230 is equipped with a sensor for detecting the amount of treated water stored.

[0053] The ozone supply device 240 is, for example, a device that supplies ozone to treated water stored in the second storage tank 230. As shown in Figure 5, the ozone supply device 240 includes a first ozone supply unit 141, an ozone generation unit 142, an oxygen supply unit 143, a first ozone supply passage 144, a valve 145, a second ozone supply unit 241, a second ozone supply passage 244, and a valve 245. The first ozone supply unit 141, the ozone generation unit 142, the oxygen supply unit 143, the first ozone supply passage 144, and the valve 145 were described in the first embodiment, so their description is omitted here.

[0054] The second ozone supply unit 241 is, for example, a part that supplies ozone to treated water stored in the second storage tank 230. The second ozone supply unit 241 is, for example, connected to one end of the second ozone supply passage 244 and is located inside the second storage tank 230. Preferably, the second ozone supply unit 241 is immersed in the treated water. The second ozone supply unit 241 may be different from, for example, the first ozone supply unit 141, or it may be the same. Preferably, the second ozone supply unit 241 is a porous body as described above. If the second ozone supply unit 241 is a porous body, the porous body is often hollow cylindrical, and for example, the second ozone supply passage 244 is connected so that ozone is supplied to the inside of the porous body.

[0055] The second ozone supply path 244 is, for example, the ozone flow path when supplying ozone from the ozone supply device 240 to the second storage tank 230. In this embodiment, the second ozone supply path 244 extends from the ozone generation unit 142 to the second ozone supply unit 241. The valve 245 is, for example, a valve that switches the ozone supply from the ozone generation unit 142 to the second ozone supply unit 241 on and off. As shown in Figure 5, the valve 245 is provided in the second ozone supply path 244.

[0056] The second inspection device 250 is, for example, a device for inspecting the water quality of treated water stored in the second storage tank 230. As the second inspection device 250, various water quality testing devices used for this type of application can be used without particular limitation, depending on the desired level of water quality. In this embodiment, the second inspection device 250 inspects the water quality of the treated water with respect to various test items. These test items are not particularly limited and may be set appropriately according to, for example, the desired use of the treated water, the desired level of water quality, etc. The test items are as described above.

[0057] The control device 260 has the functions of the control device 160, and is also configured to supply ozone to the treated water stored in the second storage tank 230 through the second ozone supply path 244 based on the inspection results obtained by the second inspection device 250. For this reason, the control device 260 may be configured such that, for example, the detection unit acquires information detected by various sensors provided in the system 200. The instruction unit may be configured to instruct the on / off operation of each device and part in the system 200, the opening and closing of each valve, and the adjustment of the opening degree of each valve. The acquisition unit has the above-mentioned functions and may be configured to acquire the inspection results obtained before supplying ozone and the inspection results obtained after supplying ozone to the treated water stored in the second storage tank 230. The adjustment unit has the above-described functions and is preferably configured to adjust the amount of ozone supplied by the ozone supply device 240 to the second storage tank 230 according to the water quality of the treated water stored in the second storage tank 230, based on the inspection results obtained by the second inspection device 250. The data storage unit has the above-described functions and is preferably configured to temporarily store the inspection results obtained before supplying ozone and the inspection results obtained after supplying ozone for the treated water stored in the second storage tank 230. The determination unit has the above-described functions and is preferably configured to determine whether the treated water stored in the second storage tank 230 is of a predetermined water quality, based on the inspection results obtained by the second inspection device 250.

[0058] Figure 6 is a flowchart of system 200. The control flow of system 200 will be explained below, with reference to Figures 4 to 6 as appropriate. Steps S21 to S26 in the control flow shown in Figure 6 are the same as steps S11 to S16 shown in Figure 3 for system 100, so their explanation will be omitted here.

[0059] In the determination in step S27, for example, the determination unit of the control device 260 determines, based on the inspection results obtained by the first inspection device 150, whether the treated water stored in the first storage tank 130 after ozone supply can be released. In the configuration shown in Figure 6, if the determination does not determine that release is possible (No), the control flow returns to step S24 and repeats the subsequent steps.

[0060] On the other hand, if the determination is made that the water can be released (Yes), the treated water stored in the first storage tank 130 is determined to be of a predetermined quality. In this case, in this embodiment, the release valve 4 is opened (step S28). The control unit of the control device 160, for example, opens the release valve 4 and releases the treated water stored in the first storage tank 130. The treated water released from the first storage tank 130 is sent to the second storage tank 230 via the piping 5 and stored there (step S29). Although not particularly limited, the treated water may be stored in the second storage tank 230 for a certain period of time (for example, until it is actually used).

[0061] Next, an inspection is carried out (step S2A). In the inspection of step S2A, for example, the second inspection device 250 inspects the water quality of the treated water stored in the second storage tank 230. Here, the items from the inspections in steps S23 and S26 are inspected. At this time, the inspection results obtained by the second inspection device 250 are acquired by the acquisition unit of the control device 260 and stored in the data storage unit. The inspection results obtained by the second inspection device 250 are acquired by the acquisition unit of the control device 260 and stored in the data storage unit. Although not particularly limited, from the viewpoint of supplying treated water of a certain level of quality when used, the inspection in step S29 may be carried out, for example, when the treated water is used.

[0062] Next, a determination is made (step S2B). In the determination, for example, the determination unit of the control device 260 determines whether the treated water stored in the second storage tank 230 can be released based on the inspection results obtained by the second inspection device 250. In the configuration shown in Figure 6, if it is determined that it can be released (Yes), the treated water stored in the second storage tank 230 is judged to be of a predetermined quality, and the control flow ends (END). In this case, the instruction unit of the control device 260 may open the release valve (not shown) and release the treated water stored in the second storage tank 230.

[0063] On the other hand, if the determination does not result in approval for release (No), an adjustment process is performed (step S2C). In the adjustment process, the control device 260 adjusts the amount of ozone supplied by the ozone supply device 240 based on the inspection results obtained by the second inspection device 250, for example. In this embodiment, the adjustment unit of the control device 260 adjusts the amount of ozone supplied by the ozone supply device 240 according to the water quality of the treated water stored in the second storage tank 230, based on the inspection results obtained by the second inspection device 250. The control device 260 (here, the adjustment unit) may perform the above adjustment while referring to the inspection results stored in the data storage unit and the map stored in the map information storage unit, for example.

[0064] Next, ozone supply is performed (step S2D). In ozone supply, the ozone supply device 240 supplies ozone to the treated water stored in the second storage tank 230. In this embodiment, the instruction unit of the control device 260 opens the valve 245 and supplies ozone obtained in the ozone generation unit 142 (for example, ozone stored in the ozone tank mentioned above) to the second storage tank 230 via the second ozone supply passage 244.

[0065] Subsequently, the control flow repeats the steps from step S2A onward, as shown in Figure 6.

[0066] As described above, the system 200 according to this embodiment may include a discharge valve 4 for discharging treated water stored in the first storage tank 130, and a second storage tank 230 for storing the treated water discharged from the first storage tank 130. The control device 260 may be configured to open the discharge valve 4 when the treated water stored in the first storage tank 130 meets a predetermined water quality based on the inspection results obtained by the first inspection device 150. This allows the discharge of treated water of a certain quality from the first storage tank 130 and stores the discharged treated water in the second storage tank 230. At this time, the first storage tank 130 becomes empty, and the raw water purification treatment can be started.

[0067] The system 200 may further include a second inspection device 250 for inspecting the water quality of the treated water stored in the second storage tank 230, and an ozone supply channel (here, a second ozone supply channel 244) for supplying ozone to the second storage tank 230. The control device 260 may be configured to supply ozone to the treated water stored in the second storage tank 230 through the ozone supply channel (here, a second ozone supply channel 244) based on the inspection results obtained by the second inspection device 250. This allows for the appropriate supply of ozone to the second storage tank 230, thereby maintaining the water quality of the treated water stored in the second storage tank 230 at a constant level.

[0068] <Third Embodiment> Figure 7 is a block diagram of the water supply system 300. Figure 7 shows the various devices included in the water supply system 300 according to the third embodiment (hereinafter also simply referred to as "system 300"). As shown in Figure 7, system 300 includes a water intake device 110, a first purification device 120, a first storage tank 130, a second storage tank 230, an ozone supply device 140, a first inspection device 150, a second inspection device 250, and a control device 360. The water intake device 110, the first purification device 120, the first storage tank 130, the ozone supply device 140, and the first inspection device 150 were described in the first embodiment, so their description is omitted here. The second storage tank 230 and the second inspection device 250 were described in the second embodiment, so their description is omitted here. The control device 360 ​​will be described further later.

[0069] In the configuration shown in Figure 7, the system 200 further includes a power storage device 170 and a power generation device 180. The power storage device 170 and the power generation device 180 were described in the first embodiment, so their description is omitted here. As shown in Figure 7, the system 300 further includes a valve 2, a flow meter 3, a discharge valve 4, and piping 5. These were described in the first embodiment, so their description is omitted here. While not particularly limited, a pump may be provided in the piping 5 as needed.

[0070] As shown in Figure 7, the system 300 further includes a recirculation channel 6. The recirculation channel 6 is, for example, a channel for recirculating treated water stored in the second storage tank 230 to the first storage tank 130. In this embodiment, the recirculation channel 6 is provided between the first storage tank 130 and the second storage tank 230. A valve 7 is provided in the recirculation channel 6. Although not particularly limited, it is preferable to provide a pump in the recirculation channel 6.

[0071] The control device 360 ​​has the functions of the control device 160 and is further configured to recirculate the treated water stored in the second storage tank 230 to the first storage tank 130 via the recirculation channel 6, based on the inspection results obtained by the second inspection device 250. For this reason, the control device 360 ​​may be configured such that, for example, the detection unit acquires information detected by various sensors provided in the system 300. The instruction unit may be configured to instruct the on / off operation of each device and part in the system 300, the opening and closing of each valve, and the adjustment of the opening degree of each valve. The acquisition unit has the above-mentioned functions and is also configured to acquire the inspection results obtained by the second inspection device 250. The adjustment unit has the above-mentioned functions and is also configured to adjust the amount of ozone supplied by the ozone supply device 140 to the treated water recirculated to the first storage tank 130 via the recirculation channel 6, according to the water quality of the treated water stored in the second storage tank 230, based on the inspection results obtained by the second inspection device 250. The data storage unit has the functions described above and is configured to temporarily store the inspection results obtained by the second inspection device 250. The determination unit has the functions described above and is preferably configured to determine whether the treated water stored in the second storage tank 230 is of a predetermined quality based on the inspection results obtained by the second inspection device 250.

[0072] Figure 8 is a flowchart of system 300. The control flow of system 300 will be explained below, with reference to Figures 7 and 8 as appropriate. Steps S31 to S36 in the control flow shown in Figure 8 are the same as steps S11 to S16 shown in Figure 3 for system 100, so their explanation will be omitted here. Steps S37 to S39 and step S3A in the control flow shown in Figure 8 are the same as steps S27 to S29 and step S2A shown in Figure 6 for system 200, so their explanation will be omitted here.

[0073] In the determination in step S3B, for example, the determination unit of the control device 360 ​​determines whether the treated water stored in the second storage tank 230 can be discharged based on the inspection results obtained by the second inspection device 250. In the configuration shown in Figure 8, if it is determined that discharge is possible (Yes), the treated water stored in the second storage tank 230 is judged to be of a predetermined quality, and the control flow ends (END). In this case, the instruction unit of the control device 360 ​​may open the discharge valve (not shown) and discharge the treated water stored in the second storage tank 230.

[0074] On the other hand, if the determination does not result in approval for discharge (No), the treated water stored in the second storage tank 230 is returned to the first storage tank 130 (step S3C). In this embodiment, the instruction unit of the control device 360 ​​opens the valve 7 and, if necessary, switches on the pump installed in the return flow path 6. As a result, the treated water stored in the second storage tank 230 is returned to the first storage tank 130 via the return flow path 6.

[0075] Subsequently, the control flow repeats the steps from step S34 onward, as shown in Figure 8.

[0076] As described above, the system 300 according to this embodiment may include a recirculation channel 6 for recirculating treated water stored in the second storage tank 230 to the first storage tank 130, and a second inspection device 250 for inspecting the water quality of the treated water stored in the second storage tank 230. The control device 360 ​​may be configured to recirculate the treated water stored in the second storage tank 230 to the first storage tank 130 through the recirculation channel 6 based on the inspection results obtained by the second inspection device 250. This allows the water in the second storage tank 230 to be recirculated to the first storage tank 130 if the treated water stored in the second storage tank 230 is not at a certain level of water quality. In this embodiment, it is not necessary to add a function to supply ozone to the second storage tank 230 to the ozone supply device 140.

[0077] The embodiments of the technology disclosed herein have been described above. However, the technology disclosed herein is not limited to the embodiments described above and may include other modifications as long as they can achieve the effects of the technology disclosed herein. Modifications of the technology disclosed herein will be described below with reference to the drawings as appropriate.

[0078] The water supply system disclosed herein may further include a frame in which a water intake device 110, a first purification device 120, a first storage tank 130, an ozone supply device 140, a first inspection device 150, and any of the above-described control devices are arranged in predetermined positions. This allows the water supply system disclosed herein to be unitized. Therefore, the water supply system disclosed herein can be more easily mounted on a vehicle (e.g., a self-propelled vehicle). In this case, if necessary, the frame may further have space for a second storage tank 230, an ozone supply device 240, and a second inspection device 250.

[0079] The water supply system disclosed herein may further include a communication device as needed. The inspection results obtained by the first inspection device 150 may be notified to a predetermined terminal by the communication device. This allows, for example, the water quality of the treated water to be notified to a mobile terminal. The communication device may also notify the terminal of the inspection results obtained by the second inspection device 250 as needed.

[0080] The water supply system disclosed herein may be mounted on a self-propelled vehicle. This makes the water supply system mobile. In this case, the water supply system can be particularly preferably used in situations where it is difficult to supply water of a certain quality, such as during a disaster.

[0081] Figure 9 is a block diagram of the ozone supply device 540. Figure 9 shows the various parts of the ozone supply device 540, as well as the energy storage device 170, the power generation device 180, and the power generation device 580. The water supply system disclosed herein may include the ozone supply device 540 instead of the ozone supply device 140 or the ozone supply device 240. The water supply system disclosed herein may include the power generation device 580 in addition to the power generation device 180.

[0082] As shown in Figure 9, the ozone supply device 540 comprises an ozone generating unit 542, an oxygen supply unit 543, and a first ozone supply line 544. In the configuration shown in Figure 9, the oxygen supply unit 543 is connected to an oxygen tank 5432 via piping D. Here, the ozone generating unit 542 generates ozone using oxygen supplied from the oxygen tank 5432 via piping D. The ozone generating unit 542 may be, for example, similar to the ozone generating unit 142 described above (see Figure 2, etc.), or it may be a commercially available ozone generator used for this type of application. The ozone obtained by the ozone generating unit 542 may be temporarily stored in an ozone tank (not shown).

[0083] In the configuration shown in Figure 9, the oxygen supply unit 543 comprises a solid oxide electrolytic cell 5431 (hereinafter also referred to as "SOEC5431") and an oxygen tank 5432. SOEC5431 generates oxygen by electrolyzing water. The configuration of SOEC5431 itself does not characterize the technology disclosed herein. Therefore, the configuration of SOEC5431 itself will not be described here. As shown in Figure 9, piping B is connected to SOEC5431. Piping B is, in this case, a water supply route to SOEC5431. Piping B is connected to a water supply source A. For example, from the viewpoint of obtaining higher purity oxygen, the water supplied to SOEC5431 should be water of a certain quality. Although not particularly limited, the water supplied to SOEC5431 may be, for example, water supplied by system 100, system 200, or system 300. In this case, the supply source A may be the first storage tank 130 or the second storage tank 230. The piping B is provided with a pump (not shown) and a valve C. In this embodiment, the hydrogen produced simultaneously with oxygen by SOEC5431 is stored in the hydrogen tank 582, which will be described later.

[0084] In the configuration shown in Figure 9, the power generation equipment of the water supply system includes power generation equipment 180 and power generation equipment 580. Power generation equipment 180 is as described above and will not be described here. In this embodiment, power generation equipment 180 includes a photocell equipped with a solar panel. Power generation equipment 580 here includes a solid oxide fuel cell 581 (hereinafter also referred to as "SOFC581"), a hydrogen tank 582, and an oxygen tank 583. SOFC581 is the main component of power generation in power generation equipment 580. As SOFC581, for example, any SOFC used for this type of application can be used without particular limitation. The hydrogen tank 582 is, for example, a tank for storing hydrogen used in the operation of SOFC581. In this embodiment, hydrogen generated by SOEC5431 is stored in the hydrogen tank 582. The oxygen tank 583 is, for example, a tank for storing oxygen used in the operation of SOFC581. In this embodiment, the oxygen tank 583 stores, for example, concentrated oxygen from the air.

[0085] As described above, the water supply system disclosed herein may include an SOEC5431. The SOEC5431 may generate oxygen for ozone production using electricity obtained from a power generator (here, power generators 180 and SOFC581). This allows for the supply of higher purity oxygen, thereby supplying higher purity ozone to the first storage tank 130 and the second storage tank 230.

[0086] The power generation device of the water supply system may include a photocell equipped with a solar panel (here, power generation device 180) and SOFC 581. The control device of the water supply system disclosed herein may be configured to switch the power generation device to be activated in response to sunlight received by the solar panel. As a result, the water supply system uses a combination of the power generation device 180, which utilizes natural energy such as sunlight, and the SOFC 581, enabling efficient power generation in environments and situations where materials are limited. Among these, sunlight is preferred because it is a more stably supplied natural energy source.

[0087] SOFC581 may be configured to use hydrogen obtained by SOEC5431 and oxygen from the air. This allows the hydrogen generated simultaneously with the oxygen used to produce ozone to be utilized for other purposes. Since oxygen from the air is used as the oxygen for SOFC581, material shortages can be avoided.

[0088] The technologies disclosed herein include the forms described in the following sections. Section 1: A water intake device for taking in raw water, A first purification device for purifying the raw water taken in by the aforementioned water intake device, A first storage tank for storing treated water purified by the 1st purification device, An ozone supply device that supplies ozone to the treated water stored in the first storage tank, A first inspection device for inspecting the water quality of the treated water stored in the first storage tank, Control device and Equipped with, The control device is Based on the inspection results obtained by the first inspection device, the system is configured to perform an adjustment process to adjust the amount of ozone supplied by the ozone supply device. Water supply system. Section 2: The system further includes a discharge valve for releasing the treated water stored in the first storage tank, The control device is configured to open the discharge valve when the treated water stored in the first storage tank meets a predetermined water quality based on the inspection results obtained by the first inspection device. The water supply system described in item 1. Section 3: A discharge valve for releasing treated water stored in the first storage tank, A second storage tank for storing treated water discharged from the first storage tank, Equipped with, The control device is Based on the inspection results obtained by the first inspection device, the discharge valve is configured to open if the treated water stored in the first storage tank has a predetermined water quality. A water supply system as described in item 1 or 2. Section 4: A second inspection device for inspecting the water quality of the treated water stored in the second storage tank, An ozone supply path for supplying ozone to the second storage tank and Equipped with, The control device is Based on the inspection results obtained by the second inspection device, the system is configured to supply ozone to the treated water stored in the second storage tank through the ozone supply path. A water supply system as described in any one of items 1 to 3. Section 5: A recirculation channel for recirculating treated water stored in the second storage tank back to the first storage tank, A second inspection device for inspecting the water quality of the treated water stored in the second storage tank, Equipped with, The control device is Based on the inspection results obtained by the second inspection device, the treated water stored in the second storage tank is configured to be returned to the first storage tank through the recirculation channel. A water supply system as described in any one of items 1 to 3. Item 6: The water intake device, the first purification device, the first storage tank, the ozone supply device, the first inspection device, and the control device are further provided with a frame in which they are arranged at predetermined positions. A water supply system as described in any one of items 1 to 5. Section 7: Equipped with further communication devices, The inspection results obtained by the first inspection device are notified to a predetermined terminal by the communication device. A water supply system as described in any one of items 1 to 6. Section 8: The ozone supply device has a porous body having multiple pores that generate fine ozone bubbles with an average bubble diameter of less than 150 μm. The porous body is placed inside the first storage tank. A water supply system as described in any one of items 1 through 7. Section 9: The porous body has a plurality of pores capable of releasing ozone bubbles with an average bubble diameter of 10 nm to 100 μm. The water supply system described in item 8. Section 10: The ozone supply device is configured to generate ozone using oxygen from the air. A water supply system as described in any one of items 1 through 9. Section 11: Furthermore, it comprises a power generation device and a power storage device for storing the electricity obtained by the power generation device, A water supply system as described in any one of items 1 through 10. Section 12: Furthermore, the device includes a solid oxide electrolytic cell that generates oxygen for producing ozone using the electricity obtained by the power generation device, The water supply system described in item 11. Section 13: The power generation device includes a solar cell equipped with solar panels and a solid oxide fuel cell. The control device is configured to perform a process of switching the power generation device to an operating state in response to sunlight received by the solar panel. A water supply system as described in item 11 or 12. Section 14: The solid oxide fuel cell is configured to use hydrogen obtained by the solid oxide electrolytic cell and oxygen from the air. A water supply system as described in any one of items 11 to 13. Section 15: Mounted on a self-propelled vehicle, A water supply system as described in any one of items 1 through 14. [Explanation of Symbols]

[0089] 100-300 systems 110 Water intake device 120 First purification device 130 1st storage tank 140, 240, 540 Ozone supply unit 150 First inspection device 160, 260, 360 control devices 170 Energy storage device 180, 580 power generation equipment 230 2nd storage tank 250 Second inspection device

Claims

1. A water intake device for taking in raw water, A first purification device for purifying the raw water taken in by the aforementioned water intake device, A first storage tank for storing treated water purified by the first purification device described above, An ozone supply device that supplies ozone to the treated water stored in the first storage tank, A first inspection device for inspecting the water quality of the treated water stored in the first storage tank, Control device and Equipped with, The control device is Based on the inspection results obtained by the first inspection device, the system is configured to perform an adjustment process to adjust the amount of ozone supplied by the ozone supply device. Water supply system.

2. The system further includes a discharge valve for releasing the treated water stored in the first storage tank, The control device is configured to open the discharge valve when the treated water stored in the first storage tank meets a predetermined water quality based on the inspection results obtained by the first inspection device. The water supply system according to claim 1.

3. A discharge valve for releasing treated water stored in the first storage tank, A second storage tank for storing treated water discharged from the first storage tank, Equipped with, The control device is Based on the inspection results obtained by the first inspection device, the discharge valve is configured to open if the treated water stored in the first storage tank has a predetermined water quality. The water supply system according to claim 1.

4. A second inspection device for inspecting the water quality of the treated water stored in the second storage tank, An ozone supply path for supplying ozone to the second storage tank and Equipped with, The control device is Based on the inspection results obtained by the second inspection device, the system is configured to supply ozone to the treated water stored in the second storage tank through the ozone supply path. The water supply system according to claim 3.

5. A recirculation channel for recirculating treated water stored in the second storage tank back to the first storage tank, A second inspection device for inspecting the water quality of the treated water stored in the second storage tank, Equipped with, The control device is Based on the inspection results obtained by the second inspection device, the treated water stored in the second storage tank is returned to the first storage tank through the recirculation channel. The water supply system according to claim 3.

6. The water intake device, the first purification device, the first storage tank, the ozone supply device, the first inspection device, and the control device are further provided with a frame in which they are arranged at predetermined positions. The water supply system according to claim 1.

7. Equipped with further communication devices, The inspection results obtained by the first inspection device are notified to a predetermined terminal by the communication device. The water supply system according to claim 1.

8. The ozone supply device has a porous body having multiple pores that generate fine ozone bubbles with an average bubble diameter of less than 150 μm. The porous body is placed inside the first storage tank. A water supply system according to any one of claims 1 to 7.

9. The porous body has a plurality of pores capable of releasing ozone bubbles with an average bubble diameter of 10 nm to 100 μm. The water supply system according to claim 8.

10. The ozone supply device is configured to generate ozone using oxygen from the air. A water supply system according to any one of claims 1 to 7.

11. Furthermore, it comprises a power generation device and a power storage device for storing the electricity obtained by the power generation device, A water supply system according to any one of claims 1 to 7.

12. Furthermore, the device includes a solid oxide electrolytic cell that generates oxygen for producing ozone using the electricity obtained by the power generation device, The water supply system according to claim 11.

13. The power generation device includes a solar cell equipped with solar panels and a solid oxide fuel cell. The control device is configured to perform a process of switching the power generation device to an operating state in response to sunlight received by the solar panel. The water supply system according to claim 12.

14. The solid oxide fuel cell is configured to use hydrogen obtained by the solid oxide electrolytic cell and oxygen from the air. The water supply system according to claim 13.

15. Mounted on a self-propelled vehicle, A water supply system according to any one of claims 1 to 7.

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