Toilet system operation method

Abstract

To provide a toilet system operation method that can be used for a long period of time.SOLUTION: A toilet system operation method 1 includes: a miscellaneous water tank 13 installed at an upper portion of a building 100; a plurality of toilets 15 respectively disposed on a plurality of floors within the building 100; a water supply line 23 connecting the miscellaneous water tank 13 and the plurality of toilets 15; a drainage line 24 for discharging wastewater from the plurality of toilets 15; a wastewater tank 17 connected to the drainage line 24; and a supply line 28, 22 for introducing treated water in the wastewater tank into the miscellaneous water tank 13. A chemical agent 40 for decomposing the wastewater into sludge and treated water is supplied into the wastewater tank 17.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for operating a toilet system. [Background technology]

[0002] When power or water is cut off during a disaster, the use of toilets and the disposal of wastewater become an issue. While temporary toilets are being stockpiled, efforts are being made to create a "phase-free" system that allows flush toilets to be used comfortably in both everyday and non-everyday situations, and efforts are being made to develop recycling toilet technology.

[0003] Conventional recycling toilets, which also take disaster preparedness into consideration, often require a series of multiple treatment devices, such as primary treatment, secondary treatment, solid-liquid separation, activated sludge, and filtration.

[0004] Furthermore, the following document 1 discloses a method of using an ultra-water-saving toilet (0.3 to 1 liter per use) to store water in a disaster sewage tank and remove the sludge as needed. [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] Saki Watari, Masayuki Otsuka et al., Planning of water supply and drainage sanitary facilities in response to disruptions of lifelines during earthquakes, Proceedings of the Society of Air and Water Hygiene, pp. 89-92 Summary of the Invention [Problem to be solved by the invention]

[0006] However, combining multiple treatment devices poses the problem of increased maintenance and management effort and costs. Furthermore, even with ultra-water-saving toilets, the number of people who can use them is limited because they accumulate excrement, and long-term use is costly and time-consuming.

[0007] Therefore, the present invention has been made in consideration of the above circumstances, and provides a method for operating a toilet system that can be used for a long period of time. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention employs the following means. In other words, the method of operating a toilet system according to the present invention is a method of operating a toilet system comprising a miscellaneous water tank installed at the top of a building, a plurality of toilets arranged on each of multiple floors within the building, a water supply channel connecting the miscellaneous water tank to the plurality of toilets, a drainage channel for draining wastewater from the plurality of toilets, a sewage tank connected to the drainage channel, and a supply channel for introducing treated water from the sewage tank into the miscellaneous water tank, wherein a chemical solution that breaks down the wastewater into sludge and the treated water is poured into the sewage tank.

[0009] In this toilet system operation method, treated water decomposed with chemicals in the sewage tank flows through a supply line and is stored in a miscellaneous water tank. The treated water flows through a water supply line and is supplied to each toilet for use in the toilet. The treated water flows through a drainage line from the toilet as sewage and is discharged into the sewage tank, where it is decomposed into treated water with chemicals. As a result, the sewage is decomposed and made usable in the toilet, allowing the toilet to be used for a long period of time.

[0010] Furthermore, the method of operating a toilet system according to the present invention may involve withdrawing the treated water from the sewage tank based on a measurement result of an environmental factor of the sewage tank.

[0011] In this toilet system operation method, treated water is withdrawn from the sewage tank based on the results of measuring environmental factors in the sewage tank, thereby maintaining the treated water decomposed in the sewage tank at a certain standard.

[0012] Furthermore, the method for operating a toilet system according to the present invention may include extracting the sludge from the sewage tank and supplying the chemical solution and water to the sewage tank.

[0013] In the operating method of the toilet system configured as above, the sludge is removed from the sewage tank and chemicals and water are supplied to the sewage tank, so that the decomposed treated water can be further used continuously.

[0014] In addition, the method for operating a toilet system according to the present invention may include mixing air bubbles into the sewage tank.

[0015] In the operating method of the toilet system configured in this way, air bubbles are mixed into the wastewater tank to agitate it, thereby accelerating the chemical reaction of the chemical solution in the wastewater tank. [Effects of the Invention]

[0016] According to the method for operating the toilet system of the present invention, it is possible to use it for a long period of time. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is an overall view showing an operation method of a toilet system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] A method of operating a toilet system according to one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall view showing an operating method of a toilet system according to one embodiment of the present invention. As shown in Figure 1, the toilet system 1 according to this embodiment is installed in a building 100 having multiple floors. In the illustrated example, the building 100 has a total of four floors, with three floors (floors) on which the toilets 15 are installed and one floor below them, but the number of floors of the building 100 is not limited to this. The number of floors on which the toilets 15 are installed may be two or less, or four or more.

[0019] A miscellaneous water receiving tank 11 and a clean water receiving tank 12 are installed in the lower part of the building 100. The miscellaneous water receiving tank 11 temporarily stores miscellaneous water sent from the water pipes. The clean water receiving tank 12 temporarily stores clean water sent from the water pipes. The installation locations of the miscellaneous water receiving tank 11 and the clean water receiving tank 12 are not limited to the lower part of the building 100 and can be set as appropriate.

[0020] A water tank 13 for miscellaneous water and a water tank 14 for clean water are installed on the upper part of the building 100. In the illustrated example, the water tank 13 for miscellaneous water and the water tank 14 are installed on the roof of the building 100, but the installation positions can be set as appropriate.

[0021] Each floor of the building 100 is equipped with a toilet 15 and a water supply system 16. The water supply system 16 is a facility that uses water for washing, kitchens, etc. In the illustrated example, one toilet 15 and one water supply system 16 are installed on each floor, but multiple toilets 15 and multiple water supply systems 16 may be installed on each floor. Also, there may be floors that do not have both or either the toilet 15 or the water supply system 16 installed.

[0022] A sewage tank 17 and a miscellaneous water layer 18 are installed in the basement of the building 100. The installation positions of the sewage tank 17 and the miscellaneous water layer 18 can be set as appropriate.

[0023] A connection line 20 is connected to the miscellaneous water receiving tank 11. A pump 21 is provided in the connection line 20. The pump 21 and the miscellaneous water tank 13 are connected by a connection line (supply line) 22.

[0024] The utility water tank 13 and each toilet 15 are connected by a water supply channel 23. The water supply channel 23 has a main water supply channel 23a connected to the utility water tank 13 and multiple branch water supply channels 23b branching off from the main water supply channel 23a. The toilets 15 are connected to the branch water supply channels 23b.

[0025] Each toilet 15 and sewage tank 17 are connected by a drainage channel 24. The drainage channel 24 has a main drainage channel 24a connected to the sewage tank 17 and multiple branch drainage channels 24b branching off from the main drainage channel 24a. The toilets 15 are connected to the branch drainage channels 24b. A switching valve 25 is provided downstream of the main drainage channel 24a, and a drainage channel 26 may be provided from the switching valve 25 that can drain water without passing through the sewage tank 17.

[0026] A circulation path (supply path) 28 is connected to the sewage tank 17. The circulation path 28 is connected to a pump 21. The pump 21 is configured to be selectively connected to either the connection path 20 from the utility water receiving tank 11 or the circulation path 28 from the sewage tank 17.

[0027] Inside the sewage tank 17, a partition 29 is provided between the point where the wastewater falls from the drainage channel 24 and the circulation channel 28. This prevents the wastewater from short-circuiting.

[0028] A connection line 30 is connected to the clean water receiving tank 12. A pump 31 is provided in the connection line 30. The pump 31 and the clean water tank 14 are connected by a connection line 32.

[0029] The drinking water tank 14 and each drinking water facility 16 are connected by a water supply channel 33. The water supply channel 33 has a main water supply channel 33a connected to the drinking water tank 14 and a plurality of branch water supply channels 33b branching off from the main water supply channel 33a. The drinking water facilities 16 are connected to the branch water supply channels 33b.

[0030] Each of the water supply facilities 16 and the gray water layer 18 are connected by a drainage channel 34. The drainage channel 34 has a main drainage channel 34a connected to the gray water layer 18 and multiple branch drainage channels 34b branching off from the main drainage channel 34a. The water supply facilities 16 are connected to the branch drainage channels 34b. A switching valve 35 is provided downstream of the main drainage channel 34a, and a drainage channel 36 may be provided from the switching valve 35 that can drain water without passing through the gray water layer 18.

[0031] In the water supply system B, clean water temporarily stored in the clean water receiving tank 12 flows through a connecting line 30, then from a pump 31 through a connecting line 32, and is stored in the clean water tank 14. The water flows through a water supply line 33 and is supplied to each clean water facility 16. The water flows through a drainage line 34 from the clean water facility 16 and is discharged into the miscellaneous water layer 18.

[0032] In normal toilet system 1A, miscellaneous water temporarily stored in miscellaneous water receiving tank 11 flows through connecting line 20, then pump 21 and then through connecting line 22, and is stored in miscellaneous water tank 13. The miscellaneous water flows through water supply line 23 and is supplied to each toilet 15. From toilet 15, the water flows through drainage line 24 as sewage and is drained into sewage tank 17, or is drained through switching valve 25 into drainage line 26.

[0033] In the event of a disaster, the toilet system 1 is configured to treat and continuously reuse wastewater in the sewage tank 17. In the operation method of the toilet system 1, a chemical solution 40 capable of decomposing wastewater is poured into the sewage tank 17. The chemical solution 40 decomposes the wastewater into sludge and supernatant treated water. The chemical solution 40 is, for example, a mineral ion solution, and Lepott X manufactured by Hitachi Co., Ltd. can be used. The chemical solution 40 is highly acidic, and its decomposition effect decreases with repeated use. The treated water decomposed by the chemical solution 40 can be used in the toilet 15 instead of miscellaneous water during normal times. Furthermore, the chemical treatment of the treated water with the chemical solution 40 prevents the generation of E. coli and reduces the odor of excrement.

[0034] The treated water decomposed by chemical solution 40 flows through circulation path 28, then pump 21 and connection path 22, and is stored in miscellaneous water tank 13. The treated water flows through water supply path 23, is supplied to each toilet 15, and is used in the toilets 15. From the toilets 15, the treated water flows through drainage path 24 as sewage, is discharged into sewage tank 17, and is decomposed by chemical solution 40.

[0035] In the initial stage of starting up the toilet system 1, a predetermined amount of water may be supplied to the sewage tank 17 together with the chemical solution 40 to ensure stable decomposition.

[0036] When the amount of the wastewater tank 17 reaches a predetermined level, it becomes possible to withdraw the treated water or discharge it into the sewer. The ratio of water to chemical solution when replacing the water is adjusted depending on the number of treatments and the concentration of the raw solution.

[0037] The system draws treated water from the sewage tank 17, issues an alarm, etc. based on the measurement results of environmental factors of the sewage tank 17. The environmental factors include the water level in the sewage tank 17, pH, number of times the toilet is used, number of times the urinal is used, etc.

[0038] The sludge is removed from the sewage tank 17, and the chemical solution 40 and water are supplied to the sewage tank 17. This allows for continuous operation. When installing in a permanent facility, multiple sewage tanks 17 may be provided for fail-safe purposes.

[0039] By mixing air bubbles into the wastewater tank 17 or generating a water current using a pump or the like to stir the wastewater tank 17, the chemical reaction of the chemical solution 40 in the wastewater tank 17 can be promoted.

[0040] In the operating method of the toilet system configured in this way, treated water decomposed by chemical solution 40 in sewage tank 17 flows through circulation path 28 and connecting path 22 and is stored in miscellaneous water tank 13. The treated water flows through water supply path 23 and is supplied to each toilet 15, where it is used in the toilets 15. It flows through drainage path 24 from toilet 15 as sewage, is discharged into sewage tank 17, and is decomposed into treated water by chemical solution 40. As a result, the sewage is decomposed and made usable in toilet 15, allowing toilet 15 to be used for a long period of time.

[0041] Furthermore, treated water is drawn from the sewage tank 17 based on the measurement results of the environmental factors of the sewage tank 17. Therefore, the treated water decomposed in the sewage tank 17 can be maintained at a certain standard.

[0042] In addition, the sludge is removed from the sewage tank 17, and the chemical solution 40 and water are supplied to the sewage tank 17. This allows the decomposed treated water to be used continuously.

[0043] Furthermore, air bubbles are mixed into the wastewater tank 17. This can promote the chemical reaction of the chemical solution 40 in the wastewater tank 17.

[0044] Furthermore, since the treated water decomposed by the chemical solution 40 is repeatedly used in the toilet 15, it is more effective in saving water than using miscellaneous water.

[0045] Furthermore, the treated water has a reduced excrement odor due to chemical treatment with the chemical solution 40, making it easier to handle. This significantly reduces the health (physical) and mental burden on users and building maintenance personnel. In addition, the reduced odor can be expected to reduce the frequency of ventilation and the need to seal the sewage tank.

[0046] Additionally, a partition 29 is provided inside the sewage tank 17 between the point where the wastewater from the drainage channel 24 falls and the circulation channel 28. Therefore, even if toilet paper floats in the sewage tank 17, the wastewater from the drainage channel 24 will not short-circuit even if the inside of the sewage tank 17 is stirred.

[0047] The shapes and combinations of the components shown in the above-described embodiment are merely examples, and various modifications can be made based on design requirements, etc., within the scope of the present invention.

[0048] For example, in the embodiment described above, the environmental factors of the sewage tank 17 are measured and treated water is drawn from the sewage tank 17 based on the measurement results, but this is not essential.

[0049] In addition, the sludge is removed from the sewage tank 17, and the chemical solution 40 and water are supplied to the sewage tank 17, but this is not essential.

[0050] Furthermore, although air bubbles are mixed into the wastewater tank 17 and a water current is generated to agitate the wastewater tank 17, this is not essential.

[0051] The Sustainable Development Goals (SDGs) are 17 international goals adopted at the United Nations Summit in September 2015. The operation method of the toilet system according to this embodiment can contribute to achieving one of the 17 SDGs, for example, goal 6, "Clean water and sanitation for all." [Explanation of symbols]

[0052] 1. Toilet System 13 Utility water tank 17 Sewage Tank 22 Connection route (supply route) 23 Water supply channel 24 Drainage Channel 28 Circulation route (supply route) 40 Chemical Solution 100 buildings

Claims

1. A water tank for utility water installed on top of the building, A plurality of toilets arranged on a plurality of floors within the building; a water supply channel connecting the miscellaneous water tank and the plurality of toilets; a drainage channel for draining wastewater from the plurality of toilets; a sewage tank connected to the drainage channel; A supply path for introducing treated water from the sewage tank into the miscellaneous water tank, A method for operating a toilet system, wherein a chemical solution that decomposes the wastewater into sludge and the treated water is poured into the wastewater tank.

2. The method for operating a toilet system according to claim 1, wherein the treated water is drawn from the sewage tank based on the results of measuring environmental factors of the sewage tank.

3. The method for operating a toilet system according to claim 1 or 2, wherein the sludge is extracted from the sewage tank, and the chemical solution and water are supplied to the sewage tank.

4. 3. The method for operating a toilet system according to claim 1, further comprising the step of: mixing air bubbles into the wastewater tank.

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