JP2016011524A - Circulation type flush toilet system for disaster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circulation type flush toilet system for a disaster that is a small scale and low cost installable in a detached house, and easy in operation when a disaster occurs.SOLUTION: A circulation type flush toilet system for a disaster comprises a first waste water pipe and a second waste water pipe branching off from a waste water pipe and switching means for making waste water flow in any one of the first waste water pipe and the second waste water pipe. The first waste water pipe is connected to a sewer pipe, the second waste water pipe is connected to a purification treatment tank, the purification treatment tank and a rainwater storage tank are connected via a communication pipe, the rainwater storage tank and an overhead storage tank are connected via a pumping-up pipe, and the overhead storage tank and a wash water tank of a flush toilet are connected via a supply pipe. The waste water flowed in the second waste water pipe is purification-treated by the purification treatment tank, and a circulation passage is formed so that purification-treated treatment water can be reused as wash water. The waste water flows in the first waste water pipe in normal time, and the waste water flows in the second waste water pipe in disaster time.

Description

  The present invention relates to a disaster-use circulation flush toilet system that purifies urine discharged from a flush toilet during a disaster and recycles and uses the purified treated water.

  Conventionally, it is a middle sewage treatment facility for disasters that is buried underground and functions as a rainwater storage or outflow control facility during normal times, and functions as a waste disposal facility during disasters. And a septic tank part that is formed adjacent to a part of the water tank part and receives water from the water tank part and functions as a waste disposal facility in the event of a disaster, and rainwater in the water tank part In order to supply water into the septic tank part, a manually and normally closed water supply valve is provided on a part of the wall that shields water between the water storage tank part and the septic tank part, and the rainwater in the water tank part flows into the septic tank part. The storage tank section and the septic tank section are connected by a communication path with a manually-operated and normally-open drain valve so that the septic tank section can be assisted by operating the water supply valve and the discharge valve. It can be switched to a water storage tank or waste disposal facility. Disaster in a sewage treatment facility is known (e.g., Patent Document 1).

  According to such a middle sewage treatment facility for disaster, it is said that a large amount of filth generated from a large number of victims during a disaster can be treated over a long period of time.

JP 2013-129932 A

  In addition, there is a demand to use hygienic toilets at home in the event of a disaster.

  However, the above-mentioned disaster middle sewage treatment facility is large and costly, and it is difficult to install it in a site such as a detached house or a relatively small apartment. Furthermore, the above-mentioned disaster middle sewage treatment facility requires complicated valve operation when a disaster occurs, and it has not been easy for ordinary people who are not specialists to operate.

  SUMMARY OF THE INVENTION Accordingly, in order to solve the above-described problems, the present invention provides a disaster circulation flush toilet system that can be installed in a detached house and is small and inexpensive and easy to operate when a disaster occurs.

  In order to achieve the above-described object, a disaster circulation flush toilet system according to the present invention includes a sewage pipe connected to a flush toilet, a first sewage pipe and a second sewage pipe branched from the sewage pipe, Switching means for causing sewage to flow into either the first sewage pipe or the second sewage pipe, and the first sewage pipe is connected to a sewage pipe or a combined treatment septic tank, and the second sewage pipe The pipe is connected to a purification treatment tank, the purification treatment tank and the rainwater storage tank are connected via a communication pipe, the rainwater storage tank and the elevated storage tank are connected via a pumping pipe, and the elevated storage tank And the flush water tank of the flush toilet are connected via a supply pipe, the sewage flowing into the second sewage pipe is purified in the purification tank, and the purified treated water is washed Disasters in which a circulation route is formed so that it can be reused A use circulating water washing toilet system, the normal, the sewage is flows into the first sewage pipe, disaster is sewage flows into the second sewage pipe.

  The purification treatment tank and the rainwater storage tank are placed in the ground so that the introduction port and the discharge port of the rainwater storage tank are disposed at substantially the same height as the inlet and the discharge port of the purification treatment tank. Can be buried.

  A useful microorganism culture tank can be connected between the purification treatment tank and the rainwater storage tank.

  As described above, the disaster circulation flush toilet system according to the present invention is small and inexpensive that can be installed in a detached house or the like, and can be easily operated when a disaster occurs.

It is a schematic sectional drawing which shows the operation | movement at the normal time of the circulation type flush toilet system for disasters concerning 1st Embodiment of this invention. It is a schematic sectional drawing which shows the operation | movement at the time of the disaster of the circulation type flush toilet system for disasters concerning 1st Embodiment of this invention. It is a schematic sectional drawing which shows the operation | movement at the normal time of the circulation type flush toilet system for disasters concerning 2nd Embodiment of this invention. It is a schematic sectional drawing which shows the operation | movement at the time of the disaster of the circulation type flush toilet system for disasters concerning 2nd Embodiment of this invention.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments.
[About the first embodiment]
A disaster circulation flush toilet system (hereinafter referred to as “circulation toilet system”) according to the first embodiment of the present invention is mainly a detached house in which about one to three households live, or a relatively small scale. Installed on the apartment grounds. As shown in FIGS. 1 and 2, the circulating toilet system according to the present embodiment is a purification that purifies sewage including flush toilet 1 and urine discharged from flush toilet 1 at the time of disaster as main components. A treatment tank 5, a rainwater storage tank 7, and an elevated storage tank 91 are provided.

  A sewage pipe 2 is connected to the flush toilet 1. The sewage pipe 2 is branched into a first sewage pipe 21 and a second sewage pipe 22, and the switching means 3 allows sewage to flow into either the first sewage pipe 21 or the second sewage pipe 22. It has a configuration that can.

  The switching means 3 may have any configuration as long as the sewage flowing into the sewage pipe 2 can selectively flow into either the first sewage pipe 21 or the second sewage pipe 22. For example, a valve is provided in each of the inflow portion to the first sewage pipe 21 and the inflow portion to the second sewage pipe 22, and the first sewage pipe is opened or closed by operating these valves. It can be set as the structure which can be made to selectively flow into any one of 21 or the 2nd sewage pipe 22 (not shown). The valve used is a gate valve structure in which the valve body divides and opens the flow path in the sewage pipe 2, or a disc-like valve body in the sewage pipe 2 controls the fluid by rotating around the valve rod. Various valves such as a butterfly valve structure and a check valve structure having a backflow prevention function can be used. Moreover, it is preferable that the switching means 3 is a structure which can be switched by simple and manual operation.

  Moreover, as shown in FIG. 1, it is preferable to connect to the flush toilet 1 with at least a part of the sewage pipe 2 exposed to the ground. In this way, for example, even if the sewage pipe 2, the second sewage pipe 22, the switching means 3, etc. buried in the ground when a large earthquake occurs, the second preliminary sewage pipe 23 is damaged. One end of the sewage pipe 2 is connected to a part of the sewage pipe 2 exposed to the ground, and the other end is connected to the opening 57 of the sedimentation separation tank 53 of the clarification treatment tank 5 so Can be made.

  The first sewage pipe 21 branched from the sewage pipe 2 is not only a sewage pipe 4 or an area where the sewerage system is maintained, but also a wastewater sewage in the kitchen and a bath. It is connected to a septic tank (a merged processing septic tank that is always used in normal times). The second sewage pipe 22 branched from the sewage pipe 2 is connected to the purification treatment tank 5, the purification treatment tank 5 and the rainwater storage tank 7 are connected via the communication pipe 6, and the rainwater storage tank 7 and the elevated storage are connected. A tank 91 is connected via a pumping pipe 9, and an elevated storage tank 91 and a washing water tank 11 are connected via a supply pipe. That is, the sewage flowing into the second sewage pipe 22 is purified in the purification treatment tank 5, and a circulation path is formed so that the treated water subjected to the purification treatment can be washed and reused.

  The purification treatment tank 5 uses various purification treatment tanks 5 having a processing capacity corresponding to the number of people living in the site where the circulating toilet system according to the present embodiment is installed.

  The purification treatment tank 5 has an inflow port 51 into which sewage flows and a discharge port 52 through which the treated water subjected to the purification process is discharged. From the inflow port 51 side toward the discharge port 52 side, a precipitation separation tank. 53, an aeration tank 54, and a sedimentation tank 55 are provided in this order. At the top of the precipitation separation tank 53, the aeration tank 54, and the precipitation tank 55, an opening 57 for inspection or cleaning is provided.

  The sewage discharged from the flush toilet 1 flows into the sedimentation separation tank 53 through the sewage pipe 2 and the second sewage pipe 22, and the suspended matter in the sewage is precipitated in the precipitation separation tank 53 and sent to the aeration tank. The sewage is agitated with the air sent from the blower 56, the microorganisms are activated to purify the filth, and then stored in the sedimentation tank 55. Further, the purification treatment tank 5 is provided with a known air pump so that sewage circulates in the purification tank.

  In the present embodiment, a low-priced and small separation-type refining purification tank 5 is used, but is not limited to this. For example, an anaerobic bed contact aeration method, a biological filtration method, A well-known purification treatment tank such as a separation contact method or a standard activated sludge method can be used.

  Since the purification treatment tank 5 according to the present embodiment purifies sewage including manure discharged from the flush toilet 1 at the time of a disaster, it is used when sewage is switched to flow into the second sewage pipe 22. However, even if the sewage flows into the first sewage pipe 21 and is discharged to the sewage pipe 4 or the combined treatment septic tank (normal time), power is supplied to the septic tank 5. The blower 56, the air lift pump, etc. are operated, and the microorganisms in the septic tank are always propagated so that they can be used immediately in the event of a disaster.

  A rainwater inflow pipe 62 connected to a rainwater collecting section such as a rain gutter is connected to the rainwater storage tank 7, and the rainwater collected in the rainwater collecting section flows into the rainwater storage tank 7. An opening for inspection or cleaning is provided in the upper part of the rainwater storage tank 7. A filter or filtration device for removing dust, fallen leaves, sand, etc. contained in the rainwater can be provided in the rainwater inflow section in the rainwater collecting section 61, the rainwater inflow pipe 62, or the rainwater storage tank 7 (not shown). . Further, the rainwater storage tank 7 and the water tap 82 are connected via a water supply pipe 83, and clean water can be supplied to the rainwater storage tank 7.

  The introduction port 71 of the rainwater storage tank 7 and the discharge port 52 of the purification treatment tank 5 communicate with each other via the communication pipe 6. One end of the overflow pipe 8 is connected to the outlet 72 of the rainwater storage tank 7, and the other end is connected to the water channel WR and the like.

  The introduction port 71 and the discharge port 72 of the rainwater storage tank 7 are provided at substantially the same height position in the upper part of the side wall of the rainwater storage tank 7, and the introduction port 71 and the discharge port 72 are provided in the purification treatment tank 5. The purification treatment tank 5 and the rainwater storage tank 7 are buried in the ground so as to be disposed at substantially the same height as the inflow port 51 and the discharge port 52. Therefore, the communication pipe 6 is connected to the discharge port 52 of the purification treatment tank 5 and the introduction port 71 of the rainwater storage tank 7 without a substantial gradient. The overflow pipe 8 may be connected to the water channel WR side without a gradient, or may be connected so that the water channel WR side is inclined downward. A backflow prevention valve 81 is provided in the overflow pipe 8 to prevent backflow of rainwater or the like overflowing from the rainwater storage tank 7.

  In the present embodiment, the overflowed rainwater is discharged into the water channel WR. However, a storage tank (not shown) for storing the overflowed rainwater is provided, and the overflow pipe 8 is connected to the storage tank to overflow. Rainwater may be stored.

  The rainwater storage tank 7 is a water supply means for automatically injecting water when the amount of storage in the rainwater storage tank 7 is reduced to a predetermined amount, and automatically stopping water supply when the water is injected to a full water level. It has. Accordingly, the rainwater storage tank 7 always stores a certain amount of rainwater or clean water (hereinafter, the rainwater or clean water stored in the rainwater storage tank 7 may be referred to as “reserved water W”). .) In addition, when it was set as the structure provided with the storage tank which stores the rainwater which overflowed from the rainwater storage tank 7 as mentioned above, this storage tank and the rainwater storage tank 7 are connected, and the storage amount is predetermined in the rainwater storage tank 7. When the amount is reduced, the rainwater stored in the storage tank may be supplied again to the rainwater storage tank 7.

  The water supply means in the present embodiment is provided with a ball tap (not shown) in the rainwater storage tank 7, and when the water level in the rainwater storage tank 7 drops to a predetermined amount, the electromagnetic valve (not shown) opens and the water is supplied. It is supplied into the rainwater storage tank 7 through the pipe 83, and when the storage amount in the rainwater storage tank 7 reaches a predetermined amount, the ball tap float is raised and the solenoid valve is closed to stop the supply of clean water. Yes. A float switch or the like may be used for detection and control of the storage amount in the rainwater storage tank 7.

  Moreover, it is good also as a structure which provides a filter body, activated carbon, etc. in a rainwater treatment tank, processes rainwater etc. in the rainwater storage tank 7, such as filtration, a deodorizing, decoloring, and stored in the rainwater storage tank 7 Stirring means for stirring rainwater may be provided to prevent the rainwater from decaying and the propagation of germs.

  The elevated storage tank 91 is installed higher than the place where the flush toilet 1 such as the roof R of the building H or the veranda is installed. The elevated storage tank 91 stores the stored water W pumped up by the pump P from the rainwater storage tank 7.

  The stored water W stored in the elevated storage tank 91 is pumped up by automatic pumping means (not shown) that pumps the stored water W from the rainwater storage tank 7 by opening and closing the electromagnetic valve by a known timer control. The timer is set so as to pump up every few hours or at a predetermined time in consideration of the life pattern of the resident who uses the flush toilet 1, and the elevated storage tank 91 always has a storage water W that is almost full. Stored.

  Further, the elevated storage tank 91 is provided with a storage amount detecting means (not shown), and when the storage amount of the elevated storage tank 91 reaches a predetermined amount, the stored water W of the rainwater storage tank 7 is pumped. It is set as the structure pumped until the elevated storage tank 91 is filled with P by P. With such a configuration, even if there is an unexpected use of cleaning water and the stored water W is not sufficiently pumped by the above-described automatic pumping means, the storage amount of the elevated storage tank 91 is It will never be less than a predetermined amount.

  In the present embodiment, a ball tap (not shown) is provided in the elevated storage tank 91, and when the water level in the elevated storage tank 91 falls and reaches a predetermined amount, an electromagnetic valve (not shown) is opened and stored in the rainwater storage tank 7. When the rainwater is pumped up by the pumping means such as the pump P to the elevated storage tank 91 through the pumping pipe 99 and the water level in the elevated storage tank 91 reaches the full water position, the float of the ball tap is raised and the electromagnetic valve is closed, The supply of rainwater from the rainwater storage tank 7 is stopped. A float switch or the like may be used for detection and control of the storage amount in the elevated storage tank 91.

  In the cleaning water tank 11, a floating ball is provided at the tip of the shaft, and a known ball tap that can open and close a valve provided at the base of the shaft is provided by displacing the floating ball due to vertical fluctuation of the water surface. It has been. When the water level in the cleaning water tank 11 is lowered by using the flush toilet 1, the floating ball is lowered and the valve is opened, and the stored water W stored in the elevated storage tank 91 through the supply pipe is stored in the cleaning water tank 11 When the water level in the washing water tank 11 reaches a predetermined amount, the floating ball rises and the valve closes, and the supply from the elevated storage tank 91 is stopped. That is, the wash water can be supplied to the wash water tank 11 of the flush toilet 1 by utilizing the natural fall due to gravity from a high place.

  The circulation toilet system according to the present embodiment is configured such that power is supplied from the roof R of the building H or the solar power generator S installed in the site, but power is supplied from a battery, a small generator, or the like. Can also be operated. In normal times, power may be supplied from an external power source to operate.

  Next, the operation | movement at the time of the normal time of the circulation type toilet system which concerns on this embodiment, and a disaster etc. are demonstrated. The disaster is not limited to the case where the supply of electricity and water is stopped due to natural disasters such as earthquakes, typhoons, heavy rains, etc., but if the water supply, sewerage or merged treatment septic tank cannot be used for some reason, etc. Disasters are also included.

  First, the normal operation will be described with reference to FIG. At the normal time, the switching means 3 is switched so that the sewage discharged from the flush toilet 1 flows into the first sewage pipe 21. Specifically, the sewage drained from the flush toilet 1 is discharged into the sewage pipe 2 by opening the valve at the inflow part of the first sewage pipe 21 and closing the valve at the inflow part of the second sewage pipe 22. And it discharges to the sewer pipe 4 or the merged processing septic tank through the first sewage pipe 21. Therefore, normally, the sewage that causes a reduction in the processing capacity is not flowed into the purification tank 5 and the microorganisms in the purification tank are constantly propagated, so that the processing capacity of the purification tank 5 is kept high. can do.

  When raining, rainwater flows into the rainwater storage tank 7 from the rainwater collecting section via the rainwater inflow pipe 62, and this rainwater is used for washing the flush toilet. When the water level of the rainwater that has flowed in reaches the height (full water level) of the introduction port 71 and the discharge port 52 of the rainwater storage tank 7, the rainwater overflows into the water channel WR and the like via the overflow pipe 8. At this time, the stored water W stored in the purification treatment tank 5 was reduced by evaporation or the like, and the stored water W level in the purification treatment tank 5 was lower than the predetermined water level (the height position of the discharge port 52). In this case, rainwater flows into the purification treatment tank 5 through the communication pipe 6, and the storage amount in the purification treatment tank 5 can be set to an appropriate water level. Moreover, since only enough rainwater flows into the septic tank from the discharge side of the septic tank to maintain an appropriate water level, a large amount of rain concentrates in the septic tank 5 in a short time, reducing the purification capacity. Since no problem occurs, for example, even if a disaster occurs immediately after heavy rain, appropriate processing according to the number of people living in the site where the circulating toilet system is installed is possible.

  The stored water W (rainwater) stored in the rainwater storage tank 7 is pumped to the elevated storage tank 91 via the pumping pipe 9. The stored water W pumped into the elevated storage tank 91 is supplied to the wash water tank 11 of the flush toilet 1 by using natural fall every time the wash water of the flush toilet 1 is used. Since the stored water W in the elevated storage tank 91 is supplied to the wash water tank 11 every time the flush toilet 1 is used, the amount of stored water decreases each time. Since the stored water W is pumped up from the rainwater storage tank 7 (in advance, the time zone in which the toilet is frequently used is examined and set to be pumped up later than that time period), the elevated storage tank 91 The amount of stored water W that is almost always full is stored. Even if there is an unexpected use of the toilet, and the stored water W in the elevated storage tank 91 may suddenly decrease, the stored amount detection means provided in the elevated storage tank 91 allows the elevated storage tank When the storage amount 91 is reduced to a predetermined amount, the stored water W is pumped up from the rainwater storage tank 7. Therefore, a certain amount of stored water W is always stored in the elevated storage tank 91. In this way, the storage amount of the elevated storage tank 91 can be made almost always full, and the elevated storage tank is higher than the rainwater storage tank 7 every time the stored water W is supplied from the elevated storage tank 91 to the wash water tank 11. Compared with the case where the stored water W is pumped to 91, power consumption can be reduced and power can be saved.

  The stored water W in the rainwater storage tank 7 is pumped to the elevated storage tank 91 and decreases. However, as described above, rainwater flows in during rainy weather, and the stored amount in the rainwater storage tank 7 is a predetermined fixed amount during sunny weather. When it becomes, water is automatically supplied by the water supply means. Therefore, since a certain amount of the stored water W is always stored in the rainwater storage tank 7, in the event of a disaster, when the treated water purified in the purification treatment tank 5 is circulated and reused as cleaning water, Reserved water W that allows the treated water to circulate appropriately can be secured.

  In this way, during normal times, rainwater is used as washing water to save water, and the purification tank 5 is maintained in a good state with high processing capacity in preparation for a disaster. Moreover, since sewage does not flow into the purification treatment tank 5 at normal times, periodic inspection of the purification treatment tank 5 is unnecessary, and the maintenance cost of the purification treatment tank 5 is reduced.

  Next, the operation at the time of disaster will be described with reference to FIG. During a disaster, the switching means 3 is switched so that the sewage discharged from the flush toilet 1 flows into the second sewage pipe 22. Specifically, the valve of the inflow part of the first sewage pipe 21 is closed, the valve of the inflow part of the second sewage pipe 22 is opened, and the sewage discharged from the flush toilet 1 2 It flows into the purification treatment tank 5 through the sewage pipe 22. As described above, the purification treatment tank 5 is maintained in a good state with a high treatment capacity, so that an appropriate purification treatment is immediately performed by simply switching the switching means 3 so that the sewage flows into the second sewage pipe 22. It becomes possible. Further, the treated water that has been subjected to purification treatment can be reused by circulating through the circulation path as described above.

  Moreover, when the solar power generator S is installed in the building H, it can be used immediately as a circulating toilet, but even if the solar power generator S is not installed, this implementation In the circulating flush toilet 1 system according to the embodiment, since a fixed amount of the stored water W is always stored in the elevated treatment tank, natural fall due to gravity is used until power is supplied from a battery, a small generator, or the like. Thus, since the wash water can be supplied to the wash water tank 11 of the flush toilet 1, the toilet at home can be used in a sanitary manner even when no power is supplied when a disaster occurs.

  Thus, according to the disaster circulation flush toilet system of the present invention, it becomes small and inexpensive, so it can be installed in a detached house or the like. Moreover, since it can be used as a circulating toilet only by switching the switching means, the operation at the time of disaster occurrence is easy. In addition, it has a water-saving effect in order to effectively use rainwater as a toilet wash during normal times.

  Although the Example of the circulation type toilet system of this embodiment is described below, it is not limited to this.

For example, when the number of residents in the site where the circulating toilet system is installed (the number of people who use the flush toilet 1 at the time of disaster) is four, the purification tank 5 has a treatment capacity of four or more. Is used. Preferably, the elevated storage tank 91 has a capacity of about 500 L, and the rainwater storage tank 7 has a capacity of about 1500 L, which is about three times the capacity of the elevated storage tank 91. The average number of urinations per day (including defecation) is 4 to 8 times. Therefore, the number of times that four people use a toilet a day is assumed to be about 16 to 32 times. If the amount of washing water in a general flush toilet 1 is 5L, the amount of washing water used by four people per day is assumed to be about 80L to 160L. Therefore, there is no problem if the solar power generator S is installed in the building H and the circulating toilet system can be circulated at the time of a disaster, but even in a situation where no power is supplied at the time of the disaster, the capacity is 500L. When the elevated storage tank 91 is installed, when a disaster occurs in a state close to full water, the flush toilet 1 can be used for about 3 to 6 days. Even if the storage amount of the elevated storage tank 91 is only 50%, the flush toilet 1 can be used for about 1.5 to 3 days. Therefore, if electric power is supplied from a battery, a small generator, etc. during this period so that it can be used as the circulating flush toilet 1, the toilet can be used hygienically in a familiar house.
[About the second embodiment]
The circulating toilet system according to this embodiment is different from the first embodiment in that a useful microorganism culture tank 100 is connected between the purification treatment tank 5 and the rainwater storage tank 7, but the other points are the first. This is the same as the embodiment.

  As shown in FIGS. 3 and 4, the circulating toilet system according to the second embodiment is configured such that the discharge port 52 of the purification treatment tank 5 and the useful microorganism culture tank outlet 102 are connected via a connecting pipe 106. The culture tank inlet 101 and the introduction port 71 of the rainwater storage tank 7 are connected via a connecting pipe 106.

  The purification treatment tank 5, the useful microorganism culture tank 100, and the rainwater storage tank 7, the inlet 51 and the discharge port 52 of the purification treatment tank 5, the useful microorganism culture tank inlet 101 and the useful microorganism culture tank flow of the useful microorganism culture tank 100. The outlet 102 and the introduction port 71 and the discharge port 52 of the rainwater storage tank 7 are buried in the ground so as to be disposed at substantially the same height position. Therefore, the connecting pipe 106 that connects the discharge port 52 of the purification treatment tank 5 and the useful microorganism culture tank outlet 102, and the connecting pipe 106 that connects the useful microorganism culture tank inlet 101 and the inlet 71 of the rainwater storage tank 7, Are connected in a substantially non-gradient state.

  The useful microorganism culture tank 100 includes useful microorganisms 104 (groups of useful microorganisms that work under favorable conditions or anaerobic conditions). The useful microorganism 104 is solidified by a well-known method such as a comprehensive method, a physical absorption method, or a covalent bond method, and the useful microorganism 104 is transferred from the useful microorganism culture tank 100 to the purification treatment tank 5. It gradually begins to flow out. Specifically, the useful microorganism 104 solidified is disposed below the useful microorganism culture tank 100, and a layer made of activated carbon 105 is formed above the microorganism. A filter (not shown) is provided above the activated carbon 105 layer. In addition, it is good also as a structure which does not provide the layer of activated carbon.

  In the useful microorganism culture tank 100, the connection pipe 106 connecting the discharge port 52 of the purification treatment tank 5 and the useful microorganism culture tank outlet 102, the useful microorganism culture tank inlet 101, and the introduction port 71 of the rainwater storage tank 7 are connected. It is preferable to dispose the tank of activated carbon 105 at a position corresponding to where the connecting pipe 106 is located.

  With such a configuration, when the purified water in the rainwater storage tank 7 flows into the purification treatment tank 5, the nutrient components of the useful microorganisms 104 filtered by the activated carbon 105 can flow into the purification treatment tank 5. It is possible to secure the condition where microorganisms live actively.

  Moreover, the sedimentation tank 55 of the purification treatment tank 5 and the useful microorganism culture tank 100 are connected via the return pipe 103, and the stored water W that has flowed into the purification treatment tank 5 is provided in the purification treatment tank. Therefore, the useful microorganism culture tank 100 and the purification treatment tank 5 are circulated. Thereby, while being able to send air into the useful microorganism culture tank 100, the nutrient of the useful microorganism 104 can be flowed in in a purification tank, and the microorganism in the purification processing tank 5 can be propagated more.

  As described above, the preferred embodiments of the present invention have been described with reference to the drawings, but various additions, changes, or deletions can be made without departing from the spirit of the present invention. Therefore, such a thing is also included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Flush toilet 11 Wash water tank 2 Sewage pipe 21 First sewage pipe 22 Second sewage pipe 23 Second preliminary sewage pipe 3 Switching means 4 Sewage pipe 5 Purification treatment tank 51 Inlet 52 Release port 53 Sedimentation separation tank 54 Aeration tank 55 Precipitation tank 56 Blower 57 Opening 6 Communication pipe 61 Rainwater collection part 62 Rainwater inflow pipe 7 Rainwater storage tank 71 Inlet 72 Discharge outlet 8 Overflow pipe 81 Backflow prevention valve 82 Water faucet 83 Water supply pipe 9 Pumping pipe 91 Elevated storage tank 100 Useful microorganism culture tank 101 Useful microorganism culture tank inlet 102 Useful microorganism culture tank outlet 103 Return pipe 104 Useful microorganism 105 Activated carbon W Reservoir WR Water channel P Pump H Building R Roof S Solar power generator

Claims (3)

A sewage pipe connected to the flush toilet,
A first sewage pipe and a second sewage pipe branched from the sewage pipe;
Switching means for causing sewage to flow into either the first sewage pipe or the second sewage pipe,
The first sewage pipe is connected to a sewage pipe or a combined treatment septic tank,
The second sewage pipe is connected to a purification treatment tank, the purification treatment tank and the rainwater storage tank are connected via a communication pipe, and the rainwater storage tank and the elevated storage tank are connected via a pumping pipe, The elevated storage tank and the flush water tank of the flush toilet are connected via a supply pipe, and the sewage that has flowed into the second sewage pipe is purified in the purification tank, and the purified treated water is A disaster-use circulation flush toilet system in which a circulation path is formed so that it can be reused after washing.
A circulatory flush toilet system for disaster in which sewage flows into the first sewage pipe during normal times and sewage flows into the second sewage pipe during disasters.   The purification treatment tank and the rainwater storage tank are underground so that the introduction port and the discharge port of the rainwater storage tank are disposed at substantially the same height as the inlet and the discharge port of the purification treatment tank. The disaster-use circulation flush toilet system according to claim 1, which is buried.   The circulation type flush toilet system for disaster according to claim 1 or 2, wherein a useful microorganism culture tank is connected between the purification treatment tank and the rainwater storage tank.

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