JP5451156B2 - Circulating flush toilet - Google Patents

Description

  The present invention includes a water receiving tank that is disposed below a toilet and introduces water to be treated, a purification tank that purifies the water to be treated introduced from the water receiving tank, and the water to be treated that is introduced from the septic tank to the toilet through the water pipe. The present invention relates to a circulating flush toilet equipped with a circulating water channel composed of a water tank that feeds water.

  Some conventional circulating flush toilets are constructed such that a toilet unit having a circulating water channel composed of a water tank such as a septic tank is mounted on a vehicle such as a trailer so as to be movable (see, for example, Patent Document 1). ).

Japanese Patent Laid-Open No. 11-21972 (5th page, FIG. 2)

  However, in Patent Document 1, it is necessary to discharge the water to be treated in the water tank to the outside of the toilet for weight reduction when the toilet is moved by the vehicle. However, there is a problem that it is not easy to move outside and cannot be moved immediately.

  The present invention has been made paying attention to such problems, and provides a circulating flush toilet that can move the treated water immediately after the toilet is moved even when the toilet needs to move suddenly. Objective.

In order to solve the above problem, the circulating flush toilet of the present invention is:
A water receiving tank that is disposed below the toilet and introduces treated water; a purification tank that purifies the treated water introduced from the water receiving tank; A circulating flush toilet equipped with a circulating water channel comprising:
A toilet unit having at least the septic tank and the water tank, and a moving unit that is placed on the toilet unit and movable to the toilet unit, and is disposed at a predetermined location;
A storage pit installed separately from the moving unit, comprising a water receiving tank, a pump for introducing treated water in the water receiving tank into the moving unit, and a detecting means for detecting a water level in the water receiving tank. When,
It is detachably connected to the moving unit and the storage pit, and consists of two connection hoses that constitute the circulating water channel ,
The storage pit has an internal capacity obtained by adding the septic tank and the water supply tank to the water receiving tank, and the moving unit transfers the treated water in the septic tank and the water supply tank to the storage pit to store the storage pit. It is characterized in that it is separated from the pit and moved from the arrangement location by the moving part.
According to this feature, the storage pit installed separately from the mobile unit has a capacity that is a water receiving tank plus a septic tank and a water supply tank, so it is necessary to move quickly such as in an emergency. In addition, the water to be treated in the septic tank and the water tank is transferred to the storage pit, and the moving unit having the toilet part having at least the septic tank and the water tank is separated from the storage pit, and immediately moved from the arrangement location by the moving part. The mobile unit can be used for toilet use together with a storage pit at another location after moving.

The circulating flush toilet of the present invention is
A transfer pipe for transferring the overflow of the water to be treated in the septic tank and the water tank is extended toward the water receiving tank of the storage pit, and the transfer pipe has a cover pipe in the septic tank and the water tank. An on-off valve capable of discharging substantially the entire amount of treated water is connected.
According to this feature, the transfer pipe that transfers the overflow of the water to be treated in the septic tank and the water tank can be used to discharge almost the entire amount of the water to be treated in the septic tank and the water tank. By connecting the on-off valve, the transfer path of the water to be treated can be collected.

The circulating flush toilet of the present invention is
The said transfer pipe has the confluence | merging part which merges with the to-be-processed water introduced from the said toilet bowl.
According to this feature, the flow path of the water to be treated toward the water receiving tank can be further aggregated by joining the water to be treated in the septic tank and the water tank and the water to be treated introduced from the toilet at the junction.

The circulating flush toilet of the present invention is
The storage pit is installed at a position lower than the moving unit, and the on-off valve is a manual type.
According to this feature, by opening the manual on-off valve, the water to be treated in the septic tank and the water tank can be transferred to the storage pit installed at a low position by the transfer pipe using the head pressure. In addition, the water to be treated can be transferred without requiring a special driving source such as a power source.

The circulating flush toilet of the present invention is
An ozone treatment means for treating the water to be treated with ozone is connected to the circulation water channel.
According to this feature, the water to be treated having the deodorizing / sterilizing effect can be reused as cleaning water by purifying the water to be treated by the ozone treatment means.

The circulating flush toilet of the present invention is
The circulating water channel is a purification water channel provided with at least the septic tank;
A branch pipe provided at a predetermined location of the purification treatment water channel and capable of branching at least a part of the water to be treated, the ozone treatment means connected to the branch pipe, and a treatment to be ozone-treated by the ozone treatment means A supply pipe for supplying water to the purification treatment water channel, an ozone treatment water channel comprising:
The introduction means for introducing the treated water in the purification treatment water channel into the ozone treatment water channel is provided at a predetermined location of the ozone treatment water channel.
According to this feature, the purification treatment water channel provided with the septic tank and the ozone treatment water channel in which the ozone treatment device is configured are combined, and the introduction device that allows the treated water to be circulated and supplied to the ozone treatment water channel is provided. Thus, the water to be treated can be safely purified by appropriately using ozone treatment that may start and stop the introduction means according to the necessity / unnecessity of ozone treatment and may affect the human body.

It is sectional drawing which shows the front of the circulation type flush toilet in an Example. It is sectional drawing which shows the plane of a toilet. It is sectional drawing which shows the side surface of a toilet. It is a flowchart which shows the circulating water channel of a toilet. It is sectional drawing which shows the condition which moves a movement unit.

  EMBODIMENT OF THE INVENTION The form for implementing the circulation type flush toilet which concerns on this invention is demonstrated below based on an Example.

  First, as shown in FIG. 1, a circulating flush toilet 1 (hereinafter abbreviated as “toilet 1”) in the present embodiment purifies treatment by circulating and transferring toilet sewage as treated water through a circulation channel, which will be described later. And it is what is called a self-treatment type toilet which reuses treated water after processing as toilet washing water. Note that the water to be treated includes all water before purification treatment, water during purification treatment, and water subjected to purification treatment, which will be described later.

  As shown in FIGS. 1 to 3, the outline of the device configuration of the toilet 1 will be described. The toilet 1 includes a unit house 4 including a toilet 10 and a septic tank (separation tank 14, contact tank 15) and the like on a movable carriage 5. The mobile unit 2 is placed at a predetermined location on the ground and the storage pit 3 is buried underground in the vicinity of the location where the mobile unit 2 is placed. The unit house 4 of the moving unit 2 constitutes the toilet portion of the present invention, and the moving carriage 5 constitutes the moving portion of the present invention. The moving unit 2 and the storage pit 3 are connected by connection hoses 11 and 21 that constitute a circulating water channel to be described later. In the present embodiment, the location of the toilet 1 is assumed to be a riverbed that can be used by an unspecified number of users.

  As shown in FIG. 2, the inside of the unit house 4 includes a toilet room 6 in which a toilet 10 is installed, a purification treatment room 7 in which tanks 14, 15, 16, 17, and the like are disposed, and an ozone treatment. The ozone processing chamber 8 in which the apparatus 33 and the like are installed, and the warehouse 9 are each partitioned by a partition wall.

  In addition, the storage pit 3 is formed as a water receiving tank 13 having a predetermined volume, and can approach the water receiving tank 13 from a manhole M disposed on the ground surface.

  The connection hoses 11 and 21 that connect the unit house 4 and the storage pit 3 to form a circulation channel are hoses having a predetermined length with flexibility. More specifically, one end of the connection hose 11 is detachably attached to a junction portion 12a where a pipe 10a connected to the toilet bowl 10 and an on-off valve 26 to 29 described later and a transfer pipe 12 connected to the drain pipes 23 and 30 join. In addition to being connected, the other end of the connection hose 11 is detachably connected to a pipe 3 a that is fixedly installed in the water receiving tank 13 inside the storage pit 3. In addition, the connection hose 21 is detachably connected to one end of the connection hose 21 to the pipe 14 b that opens to the separation tank 14, and to the pipe 20 a that extends from the pumping pump 20 in the water receiving tank 13. The end is detachably connected.

  These connecting hoses 11 and 21 are flexible and have sufficient extensions that both ends of the hoses 11 and 21 can be connected to each other, so that they are fixed separately from the moving unit 2 at predetermined positions. In addition to being able to place the mobile unit 2 with a certain allowable range with respect to the storage pit 3 installed in the storage pit 3, changes in the water weight of the tanks 14 to 17 in the unit house 4 at the normal time when the toilet 1 can be used. Thus, even if the vehicle height of the movable carriage 5 is displaced, the flexible connecting hoses 11 and 21 can follow the displacement and maintain the circulation channel.

  Further, a power connection box 56 connected to an external power source is provided in the vicinity of the location where the mobile unit 2 is disposed, and an external power source is electrically connected to the control panel 55 of the purification treatment chamber 7 via the power source connection box 56. ing. Drive power is supplied to each power drive device in the unit house 4 such as a blower 41, 42, an ozone generator 31, and an introduction pump 32, which will be described later, via the control panel 55, and a power connection box from the control unit 55. The drive power is supplied to the pumping pump 20 in the storage pit 3 via 56. Similarly, a signal line is connected to a detecting means 19 or the like to be described later in the storage pit 3 and a control signal is supplied. The power source connected to the control panel 55 is not limited to an external power source, and may be a power source obtained by a generator installed at a predetermined location near the toilet 1, for example.

  Next, as shown in FIG. 4, the description will be made along the normal path flowing through the circulation water channel of the water to be treated. The circulation water channel includes a purification treatment water channel W and an ozone treatment water channel Z. First, the purification treatment water channel W was introduced from the water receiving tank 13 for introducing the water to be treated from the toilet 10, the separation tank 14 for separating the liquid to be treated introduced from the water receiving tank 13 by solid-liquid separation, and the separation tank 14. This is a circulation channel formed by a contact tank 15 for microbial treatment of the water to be treated and a water tank 16 that can be led to the toilet 10 as the wash water from the water to be treated introduced from the contact tank 15. The water to be treated circulates through the purification treatment water channel W by the activation of the pumping pump 20 in the water receiving tank 13 described later shown in FIGS.

  The ozone-treated water channel Z is a circulating water channel formed so that the water to be treated in the water tank 16 is introduced into the ozone treatment device 33 and subjected to ozone treatment, and the ozone-treated water is returned to the water tank 16. is there. The water to be treated circulates in the ozone treatment water channel Z by starting the introduction pump 32 described later.

  Next, the separation tank 14 and the contact tank 15 constituting the septic tank of the present invention will be described with reference to FIGS.

  The separation tank 14 is installed so as to cover the weir 25 to the contact tank 15, and generates a screen 14 a having a large number of holes through which water to be treated passes, and bubbles rising along the surface of the screen 14 a. Aeration holes (not shown) are provided, and the water to be treated introduced from the water receiving tank 13 is separated into solid and liquid and led to the next contact tank 15.

  Further, the contact tank 15 includes a large number of microorganism-immobilized carriers 15a that allow the water to be treated to pass therethrough, and gives bubbles to the microorganism-immobilized carrier 15a so that the water to be treated introduced from the separation tank 14 is subjected to microorganism treatment. Further, the water is led out to the next water tank 16 through the weir part 24.

  Next, with reference to FIGS. 1-4, the purification process by the circulation of the purification process water channel of to-be-processed water is demonstrated.

  First, as shown in FIG. 1, at the beginning of the installation of the toilet 1, fresh water is stored in the water receiving tank 13 for the initial water level S as treated water, and similarly, the separation tank 14, the contact tank 15, and A predetermined amount of water is stored in the water tank 16. Instead of fresh water, river water, rain water, spring water, fire prevention water, or the like may be used. The water to be treated in the water tank 16 is supplied as flush water to the toilet bowl 10 by a flush operation of the user of the toilet room 6. The treated water supplied to the toilet 10 as washing water flows down the merging portion 12a of the transfer pipe 12 through the pipe 10a, flows down the connecting hose 11 and the pipe 3a, and is introduced into the water receiving tank 13. As will be described later, drain pipes 36, 23, and 30 provided in the contact tank 15, the water tank 16, and the storage tank 17 so as to open upward are connected to the transfer pipe 12. , 16, and 17 overflow from the water to be treated flows down the junction 12 a of the transfer pipe 12, flows down the connection hose 11 and the pipe 3 a, and is introduced into the water receiving tank 13.

  Thus, the to-be-treated toward the water-receiving tank 13 by joining the to-be-treated water in the contact tank 15, the water feeding tank 16, and the storage tank 17 and the to-be-treated water introduced from the toilet bowl 10 at the junction 12a. The water flow path can be further consolidated.

  As shown in FIG. 3, float switches 38 and 39 are provided at predetermined upper and lower positions in the water tank 16, respectively, so that the water to be treated in the water tank 16 can be treated by a number of flush operations. When the float switch 39 in the lower position is actuated due to falling below the predetermined water level, the pumping pump 20 installed at the bottom of the water receiving tank 13 is activated. By the activation of the pump 20, the water to be treated in the water receiving tank 13 is introduced into the water tank 16 through the connection hose 21, the separation tank 14, and the contact tank 15, that is, while being purified. When the water to be treated in the water tank 16 returns to the full water level, the float switch 38 in the upper position is activated and the pumping pump 20 is stopped. Thereafter, the pump 20 repeatedly starts and stops intermittently according to the water level in the water tank 16.

  If the water level in the water tank 16 does not fall below the predetermined water level even after a predetermined time (for example, 24 hours) detected by a timer (not shown) has elapsed, the pump 20 is forcibly activated. Even when there is little or no toilet use during a predetermined time, the purification process can be executed at a predetermined frequency. Further, a drain pipe 36 that opens upward in the contact tank 15 is connected to a transfer pipe 12 that extends toward the water receiving tank 13, and the contact tank 15 is forcedly activated by the above-described pumping pump 20. When the inside of 15 rises above the full water level, the overflow of the water to be treated is returned to the water receiving tank 13 through the drain pipe 36 and the transfer pipe 12. Similarly, a drain pipe 23 opened upward is connected to the transfer pipe 12 in the water tank 16, and when the water tank 16 rises above the full water level, the overflow of the water to be treated is drain pipe 23. Then, the water is returned to the water receiving tank 13 through the transfer pipe 12.

  As illustrated in FIG. 2, the flow of the water to be treated will be described. The water to be treated introduced into the separation tank 14 passes through a fine porous screen 14 a disposed around the weir 25 and is solid-liquid. The water to be treated that has been separated and passed through the screen 14a moves to the contact tank 15 described later, and the solid content is captured by the screen 14a.

  The solid content trapped in the screen 14a is diffused by the blower 41 through the air diffused holes and separated by bubbles rising along the surface of the screen 14a. Sediment and concentrate over time to produce a concentrate as described below.

  Next, the water to be treated that has passed through the separation tank 14 passes through a weir 25 having an opening in the tank wall, and is introduced into the contact tank 15.

  In the contact tank 15, the water to be treated flows along a flow path formed in the tank while passing through a large number of microorganism-immobilized carriers 15 a filled in the contact tank 15. The microorganisms fixed and attached to the microorganism-immobilized carrier 15a by this flow capture the organic component contained in the water to be treated, and organically decompose it. At the same time, the microorganisms are activated by aeration toward the microorganism-immobilized carrier 15a through the aeration holes by the blower 42, and the microorganism treatment ability can be improved.

  Thus, the to-be-processed water which flowed along the flow path in the contact tank 15 passes the dam part 24 which opened the tank wall, and is introduce | transduced in the water feeding tank 16 as the to-be-processed water purified. A predetermined amount of the water to be treated in the water supply tank 16 is led out toward the toilet 10 by the user's flush operation in the toilet room 6.

  Further, the air diffused to the water to be treated in the tanks 14 and 15 by the blowers 41 and 42 is always performed, and in this way, regardless of the frequency of use of the toilet, the air to be treated is treated. The solid-liquid separation process and the microbial process of water can be performed, that is, the purification process of the water to be treated can be continued at all times.

  Next, as shown in FIGS. 2 and 3, the circulation and transfer of the water to be treated in the ozone treatment channel Z will be described. By the activation of the introduction pump 32 as the introduction means connected to the timer (not shown), the water tank The water to be treated in 16 is supplied to the ozone treatment device 33 via the branch pipe 34 connected at the lowermost part of the water tank 16, and is ozone treated with the ozone gas generated in the ozone generator 31. The ozone-treated water to be treated is refluxed into the water tank 16 through a supply pipe 35 connected to the upper part of the water tank 16.

  As described above, the ozone treatment water channel Z is connected to the water supply tank 16 that stores the treated water that has been purified in the purification treatment water channel W, so that the separation tank 14 performs solid-liquid separation, and the contact tank 15 Since the water to be treated after being purified by microbial treatment is introduced into the ozone treatment water channel Z and can be ozone treated by the ozone treatment device 33, the load on the ozone treatment can be kept small.

  In addition, by doing in this way, substantially the entire amount of water to be treated in the water tank 16 can be treated with ozone. In addition, the water to be treated that has been purified and circulated through the purification water channel W described above and the water that has been subjected to ozone treatment and circulated through the ozone water channel Z are mixed by flowing and stirring in the water tank 16. And purification efficiency is increased.

  By doing in this way, the to-be-processed water from which the deodorizing and disinfection effect was acquired can be reused as a cleaning water by purifying the to-be-processed water with the ozone treatment apparatus 33 as an ozone treatment means.

  The ozone treatment described above is executed in a predetermined time zone (for example, 0:00 to 2:00, 8:00 to 10:00, and 16:00 to 18:00) preset by the timer. Moreover, the processing time of ozone treatment, the amount of ozone gas generation, and the like can be appropriately changed according to the expected toilet use frequency.

  As described above, the purification treatment water channel W including the separation tank 14 and the contact tank 15 as the purification tank is combined with the ozone treatment water channel Z in which the ozone treatment device 33 is configured, and the treated water is circulated through the ozone treatment water channel Z. By providing the introduction pump 32 that can supply water, the introduction pump 32 is started / stopped according to the necessity / unnecessity of the ozone treatment, and the ozone treatment that may affect the human body is used as appropriate. Water can be purified safely.

  Next, the carrying out of the concentrate accumulated in the separation tank 14 will be described with reference to FIGS. 2 and 4. The carry-out pipe 22 opened to the lower part of the separation tank 14 and the storage tank 17, respectively, An air supply pipe 43 capable of supplying air from the blower 41 toward the storage tank 17 is installed inside, so that compressed air can flow into the carry-out pipe 22. More specifically, air from the blower 41 is supplied for a predetermined time by detecting that a float switch (not shown) installed in the water receiving tank 13 has reached a predetermined water level.

  By using the toilet 1, the total amount of water to be treated flowing through the purification treatment channel W increases, and the increased amount is accumulated in the water receiving tank 13. When a water level detection means (not shown) provided in the water receiving tank 13 detects a predetermined water level, the compressed air supplied from the blower 41 into the carry-out pipe 22 flows toward the storage tank 17, thereby separating the water. The solid content of the water to be treated as a concentrate accumulated in the lower layer of the tank 14 is stored in a storage tank 17 provided separately from the circulation channel from the separation tank 14 by the air lift effect.

  Furthermore, when the inside of the storage tank 17 reaches the full water level by repeatedly carrying out the above-described concentrate, the concentrate is applied to the water receiving tank 13 through the drain pipe 30 that opens upward in the storage tank 17 at the head pressure. It is to be transferred.

  When the total amount of water to be treated increases to the full water level F or more due to the use of a large number of toilets, the full water level F is detected and notified by the detection means 19 in the water receiving tank 13, and the water in the water receiving tank 13 is passed through the manhole M The water to be treated is drawn up.

  Next, as shown in FIG. 5, the movement of the moving unit 2 mainly in the case of an emergency will be described. Here, the case of emergency is a case where it becomes impossible or difficult to use the toilet at the installation location. In this embodiment, the river bed where the toilet 1 is installed is flooded by flooding. And

  The open / close valve 26 disposed below the bottom surface of the separation tank 14, which is a water tank in the moving unit 2, and the open / close valve 27 disposed similarly below the bottom surfaces of the contact tank 15, the water supply tank 16, and the storage tank 17. , 28, and 29 are all opened, so that the total amount of water to be treated in all the tanks 14 to 17 of the moving unit 2 is connected to the respective open / close valves 26 to 29 and aggregated. Then, it is transferred into the water receiving tank 13 by the head pressure.

  In this way, the transfer pipe 12 that transfers the overflow of the water to be treated in the separation tank 14, the contact tank 15, the water supply tank 16, and the storage tank 17 is used to connect the transfer pipe 12 to the tanks 14 to 17. By connecting the on-off valves 26 to 29 that can discharge substantially the entire amount of the water to be treated, the transfer path of the water to be treated can be collected.

  Further, the on-off valves 26 to 29 are all manually open / closed. By opening the manual on-off valves 26 to 29, the water to be treated in the separation tank 14, the contact tank 15, the water supply tank 16, and the storage tank 17 is supplied. Since the head pressure can be used for the transfer to the storage pit 3 installed at a low height, the water to be treated can be transferred to the water receiving tank 13 even when power cannot be supplied in an emergency. is there. The water receiving tank 13 has an internal capacity corresponding to the emergency water level E that can receive the total water quantity in all the tanks 14 to 17 in addition to the water quantity corresponding to the full water level F at the normal time described above.

  By transferring the water to be treated to the water receiving tank 13, the moving unit 2 is reduced in weight to approximately the same weight as that at the time of installation. Subsequently, the connection hose 11 is removed from the connected junction 12a and the pipe 3a, and similarly, the connection hose 21 is removed from the connected pipe 14a and the pipe 20a. Further, the power cable connected to the power connection box 56 is also removed and stored in the warehouse 9 together with the connection hoses 11 and 21. It is preferable in terms of safety and hygiene that the opening of the pipe 3a after the connection hose 11 is removed is covered with the plug P. Similarly, the opening of the tube 20a is covered with a plug (not shown).

  Next, as shown in FIG. 5, the mobile unit 2 is mainly used in an emergency, for example, by raising the jacks 51, 51 for stopping the car and pulling the towing portion 52 by the towing means K of the towing vehicle (not shown). Thus, it is possible to evacuate from the flooded riverbed to a safe place, and it is possible to use the toilet again by using another storage pit (not shown) in the evacuated safe place.

  As described above, the storage pit 3 installed separately from the mobile unit 2 has an internal capacity obtained by adding the separation tank 14, the contact tank 15, and the water supply tank 16 that constitute the purification tank to the water receiving tank 13. Even when a sudden movement such as an emergency is required, the water to be treated in the separation tank 14, the contact tank 15, and the water tank 16 is transferred to the storage pit 3, and the separation tank 14, the contact tank 15, and The mobile unit 2 having the unit house 4 provided with the water tank 16 is separated from the storage pit 3 and immediately moved from the arrangement location by the mobile carriage 5, and the mobile unit 2 is moved together with the storage pit at another location after moving. Can be used for use.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, a chromaticity sensor that detects the chromaticity of water to be treated and / or a turbidity sensor that detects turbidity is installed at a predetermined location in a toilet or circulation channel, and the chromaticity of the water to be treated detected by this sensor. And based on turbidity, you may make it perform the purification process of to-be-processed water.

  Moreover, in the said Example, although the to-be-processed water is purified by the septic tank which consists of the separation tank 14 and the contact tank 15, the septic tank may be a tank using another well-known purification technique.

1 Circulating flush toilet 2 Mobile unit 3 Storage pit 4 Unit house (toilet)
5 Moving cart (moving part)
DESCRIPTION OF SYMBOLS 10 Toilet bowl 11 and 21 Connection hose 12 Transfer pipe 12a Merge part 13 Receiving tank 14 Separation tank (septic tank)
15 Contact tank (septic tank)
16 Water tank 17 Storage tank 20 Pumping pumps 26 to 29 On-off valve 31 Ozone generator 32 Introduction pump (introduction means)
33 Ozone treatment device 34 Branch pipe 35 Supply pipe

Claims (6)

A water receiving tank that is disposed below the toilet and introduces the water to be treated, a purification tank that purifies the water to be treated introduced from the water receiving tank, and the water to be treated introduced from the septic tank through the water pipe toward the toilet. A circulating flush toilet equipped with a circulating water channel comprising:
A toilet unit having at least the septic tank and the water tank, and a moving unit that is placed on the toilet unit and movable to the toilet unit, and is disposed at a predetermined location;
A storage pit installed separately from the moving unit, comprising a water receiving tank, a pump for introducing treated water in the water receiving tank into the moving unit, and a detecting means for detecting a water level in the water receiving tank. When,
It is detachably connected to the moving unit and the storage pit, and consists of two connection hoses that constitute the circulating water channel ,
The storage pit has an internal capacity obtained by adding the septic tank and the water supply tank to the water receiving tank, and the moving unit transfers the treated water in the septic tank and the water supply tank to the storage pit to store the storage pit. A circulating flush toilet characterized by being separated from a pit and moved from the location by the moving part.   A transfer pipe for transferring the overflow of the water to be treated in the septic tank and the water tank is extended toward the water receiving tank of the storage pit, and the transfer pipe has a cover pipe in the septic tank and the water tank. The circulating flush toilet according to claim 1, wherein an on-off valve capable of discharging substantially the entire amount of treated water is connected.   The circulating flush toilet according to claim 2, wherein the transfer pipe has a merging portion that merges with the water to be treated introduced from the toilet.   The circulating flush toilet according to claim 2 or 3, wherein the storage pit is installed at a position lower than the moving unit, and the on-off valve is a manual type.   The circulating flush toilet according to any one of claims 1 to 4, wherein an ozone treatment means for treating the water to be treated with ozone is connected to the circulation water channel. The circulating water channel is a purification water channel provided with at least the septic tank;
A branch pipe provided at a predetermined location of the purification treatment water channel and capable of branching at least a part of the water to be treated, the ozone treatment means connected to the branch pipe, and a treatment to be ozone-treated by the ozone treatment means A supply pipe for supplying water to the purification treatment water channel, an ozone treatment water channel comprising:
The introduction means for introducing the treated water in the purification treatment water channel into the ozone treatment water channel is provided at a predetermined location of the ozone treatment water channel. Circulating flush toilet.

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