JPH1054067A - Circulation type flush toilet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply treated water as wash water even when use conditions are varied by storing treated water treated in a septic tank in a storage tank, forwarding it to a flush toilet through a reclaimed-water pipeline and reutilizing it as wash water. SOLUTION: Human waste flowed from a flush toilet 1 is introduced into a septic tank, and organic matter in human waste is decomposed by bacteria during a process, in which human waste is passed through primary or tertiary treating tanks 21, 22, 23, and sewage-treated. A flow limiter 24 is installed into the primary treating tank 21, an approximately constant maximum flow rate is maintained to a second chamber 21b even when a lage quantity of human waste is flowed into a first chamber 21a at a stretch, and a human-waste treating time in a septic tank 2 is ensured. Treated water is flowed into a storage tank 3 in response to the use conditions of the flush toilet 1, and treated water is forwarded instantaneously as wash water by a circulating pump through a circulating water pump 4 at the time of the usage of the flush toilet 1. Even when the usage of the flush toilet 1 is concentrated, wash water can be supplied with treated water beforehand stored in the storage tank 3, and required water can be ensured at all times.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a flush toilet and a septic tank for treating human waste discharged from the flush toilet, and the washing water used in the flush toilet is covered by the treated water treated in the septic tank. The present invention relates to a circulating flush toilet configured as described above.

[0002]

2. Description of the Related Art Conventionally, public toilets, such as mountain huts, auto campsites in remote areas, and national parks, are usually of the pumping type, and are often unsanitary such as dark, dirty, and odorous. There are plans to make such public toilets flush, sanitary and comfortable by converting them to flush toilets. However, there are places where it is difficult to secure flush water for use in flush toilets in mountainous areas and remote areas. Therefore, a circulating flush toilet in which a flush toilet is provided in a flush toilet for treating human waste discharged from the flush toilet and the flush water used in the flush toilet is covered by the treated water treated in the above-described flush tank has been studied.

[0003]

However, conventionally,
When a public toilet installed in a mountain hut, an auto campsite in a remote area, a national park, or the like is used as the above-mentioned recirculating flush toilet, there are the following problems. That is, the public toilets installed in the places described above may be used intensively on Sundays and the like, and when the users are concentrated, the amount of washing water used in the flush toilets is rapidly increased. To increase. However, it takes a certain period of time to treat the human waste discharged from the flush toilet in the septic tank to obtain clean treated water, and the amount of the treated water cannot be rapidly increased. Therefore, there is a problem that when the treated water treated in the septic tank is reused as the washing water used in the flush toilet, the washing water may be insufficient.

The present invention has been made to solve the above problems. That is, an object of the present invention is to provide a circulating flush toilet that can reliably cover the flush water used in the flush toilet with the treated water treated in the septic tank even when the use condition of the flush toilet changes. is there.

[0005]

SUMMARY OF THE INVENTION The present invention provides a flush toilet, a septic tank for treating human waste discharged from the flush toilet, a sewage pipe connecting the flush toilet and the inlet of the septic tank, an outlet of the septic tank and a flush. A circulating flush toilet comprising: a flush water pipe connecting the toilet; and treating water treated in the septic tank being sent to the flush toilet through the flush water pipe and being reused as flush water for the flush toilet. By providing a circulating flush toilet characterized by having provided a storage tank for storing the treated water in the middle of the middle water pipe,
The above object has been achieved.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an example of a circulating flush toilet according to the present invention. FIG. 1 is a longitudinal sectional view showing the entire structure, FIG. 2 is an enlarged longitudinal sectional view showing the septic tank of FIG. 1, and FIG. 2 is an enlarged vertical sectional view showing the flow rate limiting device, FIG. 4 is a side view seen from the direction A in FIG. 3, and FIG. 5 is a vertical sectional view showing an example of the actual shape of the storage tank and rainwater tank in FIG. It is.

As shown in FIG. 1, the recirculating flush toilet of the present invention is provided with several flush toilets 1 on the second floor of a two-story building, and excrement discharged from the flush toilet 1 on the first floor. And a circulating pump 41 for returning the treated water purified in the septic tank 2 to the flush toilet 1 as washing water. In addition, rainwater is used for hand washing, and power required for the circulation pump 41 and the like is generated by a solar cell panel 91 provided on the roof of the building.

[0010] As shown in FIG. 2, the purification tank 2 includes a primary processing tank 21, a secondary processing tank 22, and a tertiary processing tank 23.
Two processing tanks are arranged in series.

A partition plate is provided inside the primary processing tank 21. The partition plate is used to separate the first chamber 21a and the second chamber 2 from each other.
1b. The upper end of the outer wall side (the side opposite to the partition plate) of the first chamber 21a is open at the end of a sewage pipe through which human waste discharged from the flush toilet flows, and this portion is formed at the entrance of the septic tank 2 (the human waste receiving port). )It has become. At the upper part of the partition plate, there is provided a flow rate restricting device 24 which is a flow path for flowing the wastewater under treatment from the first chamber 21a to the second chamber 21b and restricts the maximum flow rate thereof. (The first chamber 21a side and the second chamber 21b
Side) is provided with a tubular body having both ends open in the vertical direction. Also, the first chamber 21a and the second chamber 21
Inside each of b, special anaerobic microorganisms (anaerobic bacteria) are contained.

As shown in FIGS. 3 and 4, the flow restricting device 24 includes a first horizontal pipe extending in a horizontal direction from a socket 244 fixed so as to penetrate the partition plate of the primary processing tank 21. 241, a vertical tube 243 erected vertically upward in a T-shape from the first horizontal tube 241, and a second horizontal tube 242 horizontally extended in a T-shape from the vertical tube 243. The first horizontal tube 241, the vertical tube 243, the second
The horizontal pipes 242 are circular pipes.

The right end of the first horizontal tube 241 is an open end 2
4a, and the vertical tube 243 is the first horizontal tube 241.
The diameter is slightly smaller, the lower end thereof communicates with the first horizontal pipe 241, and the upper end is an open end 24c. The second horizontal pipe 242 has the same diameter as the vertical pipe 243, and the left end thereof is the vertical pipe 2
The right end is an open end 24b. still,
As shown in FIGS. 3 and 4, the partition plate of the first processing tank 21 is provided with a rectangular opening 24 d at a position higher than the upper end of the vertical tube 243.

As shown in FIG. 2, a secondary processing tank 22 is provided next to the primary processing tank 21 with a partition wall therebetween. The secondary processing tank 22 is provided above the partition wall from the primary processing tank 21 to the secondary processing tank 22. Tubular opening 22a for allowing sewage being treated to flow into treatment tank 22
A tubular body whose both ends are open in the vertical direction is provided on the side of the first processing tank 21 of the opening 22a.

In the secondary processing tank 22, a number of vertically-extended plastic plates are stored in a state of being stacked in the horizontal direction (the entire area indicated by the mark x in FIG. 2). The sewage being treated falls between the large number of laminated plates 22b. Special aerobic microorganisms (aerobic bacteria) adhere to the surface of each laminated plate 22b. Below the laminated plate 22b, a pipe-shaped container 22c having a large number of small holes formed on its surface is laid, and a tube coming out of an air discharge port of an air blower 22d is connected to the container 22c.

A third processing tank 23 is provided adjacent to the second processing tank 22 with a partition wall therebetween.
An opening 23a is provided for allowing sewage being treated to flow from the next treatment tank 22 into the third treatment tank 23.

A partition plate is provided in the tertiary processing tank 23, and the tertiary processing tank 23 is divided into a first chamber and a second chamber by the partition plate. An opening 25 is provided at an upper portion of the partition plate for passing the wastewater being treated. The second chamber is filled with a large number of porous ceramic balls (ceramic small balls) 23b (x in FIG. 2).
In this case, special aerobic bacteria are immobilized on the ceramic ball 23b. Note that "lively fixed" means that the aerobic bacteria are fixed in the ceramic ball 23b in a living state. Below the filling portion of the ceramic ball 23b,
A pipe-shaped container 23c provided with a number of small holes is laid,
The container 23c is connected to a pipe coming out of the air outlet of the air blower 23d.

A water tank 26 is provided adjacent to the tertiary treatment tank 23 with a partition wall therebetween.
The treated water purified from the next treatment tank 21 to the third treatment tank 23 is removed from the third treatment tank 23 to the water tank 26.
An opening 26a for flowing the gas into the inside is provided.
In addition, an overflow pipe 27 as a part of a drainage pipe for allowing the treated water to flow out by overflow is opened in an upper portion of an outer wall of the water tank 26.

Next to the septic tank 2, as shown in FIG.
The storage tank 3 is arranged. As shown in FIG. 5, the storage tank 3 is actually a horizontal cylindrical tank whose both end walls are bulged spherically. This cylindrical tank is installed on a beam of a building by supporting legs 35 and 67, and a partition wall is provided in the center of the inside of the cylindrical tank, and a chamber on the right side of the partition wall is a storage tank 3. . Inside the storage tank 3, a partition plate 3a rises from the bottom surface to an intermediate height, and a through hole 3b is provided below the partition plate 3a. The chamber on the left side of the partition wall is a rainwater tank 6 described later.

An inlet 31 for treated water is provided below the spherical end wall of the storage tank 3, and the overflow pipe 27 coming out of the upper part of the water tank 26 is connected to the inlet 31 after descending. ing. Further, on the side beyond the partition plate 3a, a circulating water inlet 32 for taking the stored treated water into a circulating water tank 4 described later is provided at a position slightly lower than the center (on the cylindrical surface of the cylindrical tank). Have been. A manhole 34 is provided at the top of the storage tank 3.

As shown in FIG. 1, a circulating water tank 4 is provided next to the storage tank 3, and a lower portion of the circulating water tank 4 and the circulating water inlet 32 of the storage tank 3 are connected to one of the drainage pipes. It is connected by a parting tube. The circulating water tank 4 is provided with a circulating pump 41 having a suction pipe lowered into the water in the tank.
An intermediate water pipe is provided from the discharge port of the circulation pump 41 to each flush toilet 1. The control circuit is configured so that the circulation pump 41 is activated by receiving an electric signal indicating the use of washing water in the flush toilet 1 (for example, a signal indicating that a flush water discharge valve is opened).

In addition, the upper part of the end wall of the storage tank 3 is shown in FIG.
As shown in FIG. 5, an overflow pipe 33 is provided, and the water level when the storage tank 3 is full is determined by the height of the pipe. The overflow pipe 33 goes out of the building after descending and is connected to the underground capillary evaporator 5. The upper part of the capillary evaporator 5 is covered with incineration ash 51.

The capacity of the storage tank 3 when it is full is determined, for example, by
When attached to septic tank 2 for 10 target personnel, 2.5
~ 3m^ThreeIs appropriate. 2.5 full capacity
m^ThreeIf less, flush toilet users will be concentrated
If the amount of washing water used suddenly increases due to
There is a risk that the amount of treated water that was ^Three
If it is larger, the manufacturing cost of the storage tank 3 increases, and
The problem of taking too much traffic arises. In addition, on storage tank 3
The capacity when full is in proportion to the number of personnel to be treated.
It does not increase or decrease.

Next to the circulating water tank 4, a rainwater tank 6 is arranged as shown in FIG. A collecting pipe 64 is connected to the rainwater tank 6 from a gutter 63 on the roof of the building. The rainwater tank 6 is actually assigned the chamber on the left side of the partition wall inside the cylindrical tank as described above (see FIG. 5),
Inside the rainwater tank 6, a partition plate 6a rises from the bottom surface to an intermediate height, and a through hole 6b is provided below the partition plate 6a. The collecting pipe 64 is connected to the top of the rainwater tank 6 near the end wall, and on the side beyond the partition plate 6a,
A rainwater inlet 65 for taking the stored rainwater into a rainwater supply tank 61 described later is provided at a position slightly lower than the center (on the cylindrical surface of the cylindrical tank). Also, overflow pipes 6 are provided at the upper and lower ends of the end wall of the rainwater tank 6, respectively.
6 and a drain pipe 69 are provided, and a manhole 68 is provided at the center of the top.

Also, as shown in FIG.
1 is provided integrally with the circulating water tank 4, and a lower portion of the rainwater supply tank 61 and the rainwater inlet 65 of the rainwater tank 6 are connected by a rainwater pipe. In the rainwater supply tank 61,
A rainwater pump 62 having a suction pipe lowered into the water in the tank is disposed.
A water pipe is connected to the faucet. The rainwater pump 62
For example, the control circuit is configured such that a sensor is provided in the hand-washing machine 7 to be activated by receiving an electric signal indicating that the faucet of the hand-washing machine 7 is opened. The ozone generator 8 is provided in the rainwater supply tank 61, and an air supply pipe for sending ozone from the ozone outlet of the ozone generator 8 to the water in the rainwater supply tank 61 is lowered.

As shown in FIG. 1, a solar cell panel 91 is laid on the roof of the building. Solar panel 9
Reference numeral 1 denotes a power source for all the electric devices of the circulating flush toilet. Cables are laid from the solar cell panel 91 to the control panel 92, and the control panel 92 accommodates control devices such as inverters and relays. . The control panel 92
, A battery (not shown) is installed, and the battery and the control panel 92 are also connected by a cable. From the control panel 92, the circulation pump 41, the rainwater pump 62, the air blowers 22d and 23d of the second processing tank 22 and the third processing tank 23, the lighting fixture 93, and the ozone generator 8
Power and control cables are laid.

Next, the operation of the circulating flush toilet will be described. First, the human waste that was flushed from the flush toilet 1
It is introduced into the first chamber 21a of the primary treatment tank 21 of the purification tank 2 through the sewage pipe. The anaerobic bacteria contained in the first chamber 21a have a function of decomposing organic substances in human waste and converting them into harmless substances such as methane, carbon dioxide gas, and hydrogen. The waste discharged from 1 is processed.

After being treated in the first chamber 21a, the sewage which has not yet been sufficiently purified flows into the second chamber 21b through the flow restricting device 24. In this case, the sewage in the first chamber 21a flows in from the lower end of the tubular body provided on the first chamber 21a side of the flow restricting device 24, rises, and after passing through the flow restricting device 24, The gas flows through the tubular body provided on the second chamber 21b side of the flow rate restricting device 24, and flows into the second chamber 21b from the lower end. The level of the sewage in the first chamber 21a is usually the height of the lower end of the first horizontal pipe 241 (the height indicated by the two-dot chain line in FIGS. 3 and 4). When there is, the water level in the first chamber 21a rises, and the sewage passes through the first horizontal pipe 241. The flow rate of the sewage passing through the flow rate restriction device 24 is regulated by the inner diameter of the first horizontal pipe 241.

When a large amount of human waste flows into the first chamber 21a at one time, the water level in the first chamber 21a rises significantly. As a result, when the water level in the first chamber 21a rises to between the second horizontal pipe 242 and the upper end of the vertical pipe 243, the sewage in the first chamber 21a is removed from the first horizontal pipe 241 and the second horizontal pipe 241. 2 flows into the second horizontal pipe 242 at the same time, the flow rate of the sewage passing through the flow restricting device 24 is increased to some extent.
(1 inner diameter), the flow rate does not increase extremely.

When the water level in the first chamber 21a rises between the upper end of the vertical pipe 243 and the opening 24d of the partition plate, the sewage in the first chamber 21a is discharged from the first horizontal pipe 241 and the second horizontal pipe 241.
Flow simultaneously into the horizontal pipe 242 and the vertical pipe 243, the flow rate of the sewage passing through the flow restricting device 24 is further increased. Does not increase.

Therefore, the flow rate of the sewage passing through the flow rate limiting device 24 increases to some extent when the level of the sewage in the first chamber 21a rises, but does not increase extremely, and the maximum flow rate is limited. Becomes Therefore, even when the inflow of human waste into the first chamber 21a increases rapidly, the first
An almost constant maximum flow rate from the chamber 21a to the second chamber 21b is maintained, whereby the maximum flow rate of the sewage being treated throughout the septic tank 2 becomes substantially constant. And an appropriate processing time is secured.

The opening 24d provided in the partition plate in the first treatment tank 21 is provided for emergency use, and the water level of the first chamber 21a should be higher than the opening 24d. When the temperature rises, the sewage also passes through the opening 24d, which reduces the degree of purification of the septic tank 2, but that the human waste in the first chamber 21a overflows to the outside as it is. The worst will be prevented.

The human waste that has flowed into the second chamber 21b after passing through the flow rate restricting device 24 is further decomposed in the second chamber 21b by the anaerobic bacteria. At this stage, the human waste becomes sewage that has been purified to some extent.

The sewage after being treated in the first treatment tank 21 flows into the upper part of the second treatment tank 22 through the opening 22a in the upper part of the partition separating the second treatment tank 22 from the wastewater. .
The sewage flowing into the second treatment tank 22 descends and passes between the laminated plates 22b. At this time, an air blower 22d is placed in a pipe-like container 22c laid below the laminated plate 22b.
, Air bubbles are ejected from the small holes of the container 22c, and float toward the laminated plate 22b. Then, air is supplied to the aerobic bacteria adhering to the surface of the laminate 22b. The aerobic bacteria have a function of oxidizing and decomposing organic substances in wastewater into harmless carbon dioxide gas by the aeration, and the wastewater is purified by activating the water.

The sewage that has passed between the laminated plates 22b and has reached the lower part of the secondary treatment tank 22 passes through an opening 23a provided at the lower end of the partition wall separating the wastewater from the tertiary treatment tank 23. Then, it flows into the first chamber of the third processing tank 23. Then, it rises in the first chamber and flows into the second chamber through the opening 25 provided on the partition plate of the tertiary processing tank 23.

The sewage flowing into the second chamber of the tertiary treatment tank 23 descends and passes between a number of ceramic balls 23b. At this time, air is sent from an air blower 23d into a pipe-shaped container 23c laid below the ceramic balls 23b, and bubbles are ejected from small holes of the container 23c to float toward the ceramic balls 23b. Then, air is supplied to the aerobic bacteria which are fixed on the ceramic balls 23b. This aeration causes the aerobic bacteria to further oxidize and decompose organic matter in the sewage into harmless carbon dioxide gas, and the sewage becomes completely purified treated water.

The treated water that has passed between the ceramic balls 23b and has reached the lower part of the third treatment tank 23 is
26a provided at the lower end of the partition wall separating
And flows into the water tank 26 provided at the end of the purification tank 2, further overflows into the overflow pipe 27, and flows into the lower part of the storage tank 3.

The treated water treated in the septic tank 2 flows into the storage tank 3 at a flow rate equal to or less than a predetermined maximum flow rate according to the use condition of the flush toilet 1. For example, if the flush toilet 1 is not used for a long time, the treated water flowing into the storage tank 3 from the septic tank 2 becomes zero. If the flush toilet 1 is used at a relatively high frequency, a considerably large amount of treated water will flow into the storage tank 3. However, the maximum flow rate of the treated water flowing from the septic tank 2 into the storage tank 3 is determined by the flow rate restricting device 24, and no matter how much use of the flush toilet 1 is concentrated at a time, the maximum flow rate of the treated water is not less than the predetermined maximum flow rate Water does not flow into the storage tank 3. In addition, there is considerable time between the time when the flush toilet 1 is used and the time when the human waste flows from the flush toilet 1 into the septic tank 2 and is treated, and then comes out of the septic tank 2 as treated water. There is a shift (delay).

On the other hand, the treated water stored in the storage tank 3 is immediately sent to the flush toilet 1 by the circulation pump 41 via the circulation water tank 4 when the flush toilet 1 is used. Therefore, when the use of the flush toilet 1 is concentrated, a large amount of treated water flows out of the storage tank 3 in a short time. In such a case, the temporary shortage of the processing water required as the cleaning water is covered by discharging the processing water stored in the storage tank 3. Then, the treated water in the storage tank 3 which has temporarily decreased is replenished from the purification tank 2 over a period of time thereafter.

In this circulating flush toilet, the processing time of the human waste in the septic tank 2 is set to 18 to 20 hours.
Both SS (suspended matter) and BOD (biochemical oxygen demand) of the treated water discharged from the septic tank 2 are 1 to 3 pp.
m. Incidentally, BOD 1 ppm water is water quality that can be made into drinking water by a simple operation such as filtration.

Further, the amount of the treated water in the storage tank 3 may increase abnormally. Because human excrement (stool, urine) contains moisture, the amount of treated water sent from the storage tank 3 to the flush toilet 1 as washing water is larger than the amount of treated water from the flush toilet 1 through the septic tank 2. This is because the amount of the treated water flowing into 3 becomes larger. Therefore, the storage tank 3
If the amount of treated water in the storage tank 3 is increased to a predetermined level or more, the treated water in the storage tank 3 overflows into the overflow pipe 33 and is guided to the outdoor capillary evaporator 5. The overflowed treated water permeates into the incineration ash 51 by capillary action in the capillary evaporator 5 and evaporates from the surface of the incineration ash 51 into the air. In this case, since the quality of the treated water that permeates the incineration ash 51 is completely purified as described above, there is no concern about contaminating the surrounding environment.

In the rain water tank 6, rain water is guided from the roof of the building by a water collecting pipe 64 and stored. The rainwater stored in the rainwater tank 6 is guided from the rainwater inlet 65 into the rainwater supply tank 61 by a rainwater pipe. Then, the ozone generator 8 provided in the rainwater supply tank 61 outputs the rainwater supply tank 6.
Ozone is released into the water in 1 and rainwater is sterilized by aeration of ozone. Rainwater sterilized in this way is supplied to the handwasher 7 by a rainwater pump 62, which is activated by receiving a signal indicating that the faucet of the handwasher 7 has been opened, for example, by providing a sensor in the handwasher 7.
To be used as water for hand washing. Hand wash 7
The sewage discharged from is discharged into the septic tank 2 for treatment.
When the amount of water in the rainwater tank 6 increases to a predetermined level or more, the water is discharged to the ground by the overflow pipe 66.

Further, all the electric power used in the circulating flush toilet is covered by power generation by the solar cell panel 91. With this electric power, the circulation pump 41 and the rainwater pump 6
2. The air blowers 22d and 23d of the second processing tank 22 and the third processing tank 23, the lighting fixture 93, and the ozone generator 8 are operated. A part of the electric power generated by the solar cell panel 91 is stored in a battery, and the electric power of the battery is used in cloudy weather or at night when the solar cell panel 91 cannot generate electric power.

In the circulating flush toilet of the present invention configured as described above, the primary treatment tank 2 in the septic tank 2 is used.
Since the flow restricting device 24 is provided on the partition plate in the first processing tank 1, even if a large amount of human waste flows into the first chamber 21 a of the primary treatment tank 21 in a short time, the flow restricting device 24 allows the first restricting device 24 to perform the first flow control. The maximum flow rate of sewage flowing from the chamber 21a to the second chamber 21b is limited. Therefore, in each of the treatment tanks (the primary treatment tank 21, the secondary treatment tank 22, and the tertiary treatment tank 23) of the septic tank 2, the time required for treating human waste is secured as planned, and 2, there is no possibility that human waste is discharged without being sufficiently treated, and therefore, sanitary washing water can always be used in the flush toilet 1.

Further, since the storage tank 3 for storing the treated water after being treated in the septic tank 2 is provided in the middle of the middle water pipe connecting the outlet of the septic tank 2 and the flush toilet 1, the use of the flush toilet 1 is concentrated. As a result, the amount of washing water used in the flush toilet 1 sharply increases, so that the amount of treated water used as washing water temporarily becomes larger than the amount of treated water coming out of the septic tank 2. However, there is no danger of running out of washing water, and the washing water used in the flush toilet 1 can be surely covered by the treated water treated in the septic tank 2.

Therefore, the above-mentioned recirculating flush toilet of the present invention is used as a public toilet in a mountain hut or an auto camp site in a remote place where it is difficult to secure water, or as a temporary toilet in a city in the event of a natural disaster such as a large earthquake. , Very useful value.

The present invention is not limited to the above-described circulating flush toilet. For example, FIGS. 1 and 2 are conceptual views for explaining the present invention, The shape and configuration may be different. That is, for example, the primary processing tank, the secondary processing tank, and the tertiary processing tank that constitute the purification tank are not integrally formed, and the primary processing tank, the secondary processing tank, and the tertiary processing tank are not integrally formed. The one separated from the treatment tank may be used.

[0046]

As is apparent from the above description, the circulating flush toilet of the present invention allows the flush water used in the flush toilet to be treated by the treated water treated in the septic tank even when the use condition of the flush toilet fluctuates. There is no need for external water supply except for rainwater for hand washing, and there is no danger of sewage that has not been completely purified from the septic tank. Therefore, it is very useful as a public toilet in a mountain hut or an auto campsite in a remote area where it is difficult to secure water, or as a temporary toilet in a city in the event of a natural disaster such as a large earthquake.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of the entire configuration of a circulating flush toilet of the present invention.

FIG. 2 is an enlarged longitudinal sectional view showing the septic tank of FIG. 1;

FIG. 3 is an enlarged longitudinal sectional view of the flow rate limiting device of FIG. 2;

FIG. 4 is a side view as viewed from a direction A in FIG. 3;

FIG. 5 is a longitudinal sectional view showing an example of actual shapes of a storage tank and a rainwater tank of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rinse toilet 2 Septic tank 21 Primary processing tank 22 Secondary processing tank 22b Laminate board 22d Air blower 23 Tertiary processing tank 23b Ceramic ball 23d Air blower 24 Flow control device 3 Storage tank 31 Inlet 32 Circulating water inlet 4 Circulating Water Tank 41 Circulating Pump 5 Capillary Evaporator 6 Rain Tank 61 Rain Water Supply Tank 62 Rain Water Pump 7 Hand Washer 8 Ozone Generator 91 Solar Panel 92 Control Panel 93 Lighting Fixture

Claims (3)

[Claims] 1. A flush toilet, a septic tank for treating human waste discharged from the flush toilet, a sewage pipe connecting the flush toilet and an inlet of the septic tank, and a sewer pipe connecting the outlet of the septic tank and the flush toilet. A circulating flush toilet configured so that the treated water treated in the septic tank can be sent to the flush toilet through the middle flush pipe and reused as flush water for the flush toilet, and in the middle of the middle flush pipe. A circulating flush toilet comprising a storage tank for storing the treated water. 2. The circulating flush toilet according to claim 1, further comprising a flow restricting device for limiting a maximum flow rate of the excrement being processed from the inlet side to the outlet side in the septic tank. 3. An overflow pipe for determining a water level when the treated water to be stored is full is connected to an upper portion of the storage tank, and a capillary evaporator covered with incineration ash is provided at a tip of the overflow pipe. The circulating flush toilet according to claim 2, wherein the toilet is provided.