JP2013129962A - In-disaster sewage treatment facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide composite in-disaster sewage treatment facilities that functions as storage or outflow suppression facilities for rainwater and waste disposal facilities.SOLUTION: The in-disaster sewage treatment facilities include a water storage tank part which reserves rainwater, and a septic tank part which is formed adjacently to a part of the water storage tank part and functions as a septic tank by being supplied with water from the water storage tank part during a disaster, the septic tank part being switched to an auxiliary water storage tank or waste disposal facilities.

Description

  The present invention relates to a disaster middle sewage treatment facility that can treat filth such as manure using rainwater in the event of a disaster such as a large earthquake, typhoon, or large-scale fire.

Various rainwater storage facilities that can be used in disasters have been proposed (Patent Documents 1 to 3).
Moreover, the portable simple toilet is used as an emergency filth disposal means at the time of a disaster (patent document 4).

JP 2003-119834 A JP 2002-275958 A JP 7-132299 A JP-A-3-212527

Conventional water storage facilities and simple toilets have the following problems.
<1> A conventional water storage facility is a dedicated facility for storing water and does not have a waste disposal function and cannot be diverted to waste disposal.
<2> The conventional water storage facility has a problem in terms of hygiene because miscellaneous germs easily propagate because of poor mobility of the stored water.
In consideration of hygiene, a water storage facility equipped with an electric water purifier has also been proposed. However, there is a problem that not only a dedicated power source is required for its operation, but also that it does not function at all if the power source is lost.
<3> Since a simple toilet has a small tank capacity, it is necessary to frequently collect filth and set a medicine or the like into an empty tank, which is troublesome to maintain and manage the simple toilet.
In particular, the longer the evacuation period, the greater the burden of maintenance and management of the simple toilet.
<4> At present, when large-scale earthquakes are predicted, there is an urgent need to expand an evacuation environment in which a large number of evacuees can live for a long period of time. In particular, it is an urgent task to develop a waste disposal facility that can handle a large number of evacuees even when power and water are lost.

The present invention has been made in view of the above points. The purpose of the present invention is a complex disaster that functions as a rainwater storage or outflow control facility in normal times and functions as a waste disposal facility in disasters. The purpose is to provide industrial sewage treatment facilities.
Still another object of the present invention is to provide a disaster middle sewage treatment facility capable of increasing the amount of rainwater stored during heavy rain.

  The present invention is a disaster middle sewage treatment facility that is buried in the ground and functions as a rainwater storage or outflow control facility during normal times, and functions as a filth treatment facility during a disaster. A water storage tank part for suppressing the water tank, and a septic tank part that is formed adjacent to a part of the water tank part and receives water from the water storage tank part in the event of a disaster and functions as a waste disposal facility. In order to be able to supply rainwater 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. In order to allow inflow and outflow, the water storage tank section and the septic tank section are connected by a communication path with a manual and normally open discharge valve, and the septic tank section is operated by operating the water supply valve and the discharge valve. It can be switched to an auxiliary water tank or a waste disposal facility. It is characterized in.

The septic tank unit comprises a sewage treatment chamber, a sedimentation chamber located upstream of the sewage treatment chamber, and a water supply valve for receiving water from the water storage tank, and functions as an auxiliary water storage tank at normal times. In the event of a disaster, it receives water from the water tank and functions as a waste disposal facility.
The water storage tank section includes an inflow tank into which rainwater flows through an inflow pipe, and an outflow tank adjacent to the inflow tank on the downstream side of the inflow tank with an overflow wall interposed therebetween.
If one or more drooping walls are suspended from a part of the inflow tank in the transverse direction of the tank, the rainwater flowing in the inflow tank is agitated to effectively prevent the propagation of germs and water corrosion. it can.
In addition, when the outflow tank is provided with outflow suppression means for suppressing rainwater outflow and temporarily storing rainwater in the outflow tank so that the water can be stored in the outflow tank, The amount of stored water is greatly increased.
The said water storage tank part and septic tank part which comprise the middle sewage treatment facility for disaster are formed integrally using precast concrete, cast-in-place concrete, or these together.

The disaster middle sewage treatment facility according to the present invention can be used as a rainwater storage or outflow control facility in normal times, and can be effectively used as a sewage treatment facility capable of treating a large amount of filth over a long period of time. can do.
In particular, since the water storage tank part is adjacent to the septic tank part, it is possible to supply a large amount of water to the septic tank part. Can be processed.

Overall view of treatment facility according to the present invention Plan schematic diagram of processing facility according to the present invention Sectional view of III-III in Fig. 2 Sectional view of IV-IV in Fig. 2 Sectional view of VV in FIG. Sectional view of VI-VI in FIG. Perspective view of the septic tank partly broken Explanatory drawing of piping condition of sewage pipe and simple toilet Longitudinal sectional view of treatment facility for explaining sewage purification treatment Partial longitudinal section of the outflow tank

  Embodiments of the present invention will be described below with reference to the drawings.

[Constitution]
First, the configuration of the disaster middle sewage treatment facility 10 (hereinafter referred to as “treatment facility 10”) according to the present invention will be described.
In the description, the supply side is defined as “upstream side” and the discharge side is defined as “downstream side” with respect to the flow of water.

<1> Outline of Processing Facility FIG. 1 is an overall view of the processing facility 10 according to the present invention, FIG. 2 is a schematic plan view thereof, FIGS. 3 and 4 are longitudinal sectional views of the processing facility 10, and FIG. A cross-sectional view of the processing facility 10 is shown in FIG.

  As shown in FIGS. 1 and 2, the treatment facility 10 according to the present invention is formed with a water storage tank section 20 for storing rainwater A and a part of the water storage tank section 20, and the water storage tank section at the time of a disaster. The septic tank part 30 which receives water supply from 20 and functions as a septic tank is comprised.

Although this example shows the case where the treatment facility 10 is formed of a plurality of precast concretes, cast-in-place concrete or a combination thereof may be used.
When the processing facility 10 is composed of a plurality of box culverts, the processing facility is divided into a plurality of units, and various wall bodies (to be described later) are integrally formed in advance inside the box culverts according to the respective units, and unitized. And excellent workability. In short, the water storage tank 20 and the septic tank 30 may be integrated.
The processing facility 10 shown in this example will be described in detail below.

<2> Reservoir Part With reference to FIGS. 1 and 2, the reservoir part 20 has an inflow tank 21 that takes in rainwater A and stores it, and an overflow wall 22 on the downstream side of the inflow tank 21. It has an outflow tank 23 formed adjacent to the inflow tank 21.
The volume of the inflow tank 21 and the outflow tank 23 can be appropriately selected in consideration of the amount of water stored.

An inflow pipe 11 for rainwater A is connected to the upstream wall surface of the inflow tank 21, and a drain pipe 12 is connected to the downstream wall surface of the outflow tank 23.
The space between the upstream side of the inflow tank 21 and the septic tank section 30 is blocked by a shared wall 26, and the downstream side of the inflow tank 21 and the outflow tank 23 have a communication structure through the space above the overflow wall 22. Yes.

  In this example, although the case where the planar shape of the water storage tank part 20 exhibits a bowl shape (L-shape) is shown, if the septic tank part 30 is adjacent to a part of the inflow tank 21, the planar shape of the water storage tank part 20 is The present invention is not limited to the illustrated form, and any shape can be applied.

<2.1> Inflow tank As shown in FIGS. 2 and 3, the inflow tank 21 is a water storage tank for always storing a certain amount of rainwater A, and the upstream side of the inflow tank 21 has a common wall 26 in between. Thus, it is adjacent to the septic tank section 30 and the downstream side of the inflow tank 21 is adjacent to the outflow tank 23 with the overflow wall 22 in between.
On the bottom surface of the inflow tank 21, a plurality of protrusions 21a are arranged in parallel in the transverse direction of the tank, and it is difficult to precipitate foreign substances such as sand by disturbing the water flow.

<2.1.1> Shared Wall As shown in FIGS. 2 and 5, the shared wall 26 is a shared partition wall that shields water between the upstream side of the inflow tank 21 and the septic tank section 30.

<2.1.2> Hanging Wall As shown in FIGS. 2 and 3, one or more hanging walls 25 are suspended in a part of the inflow tank 21 in the transverse direction of the tank. A gap through which water can flow is formed between the lower end of 25 and the bottom of the tank.
The drooping wall 25 stirs the rainwater A flowing in the inflow tank 21 to prevent the propagation of various bacteria and the corrosion of the water, and by dropping the rainwater A from the gap at the lower end of the drooping wall 25 and taking it out. It functions to replace rainwater A.

<2.1.3> Overflow Wall As shown in FIGS. 2, 4, and 6, an overflow wall 22 is erected at the boundary between the downstream side of the inflow tank 21 and the outflow tank 23.
The overflow wall 22 is a wall body for storing the rainwater A in the inflow tank 21, and can store water up to the rising height of the overflow wall 22 at the maximum.

Some of the overflow wall 22, Yes in communicating valve V ₂ always closed type are provided, by opening the communication valve V _2, it is possible to discharge the foreign matter in the inflow chamber 21 to the outlet tank 23.

<2.2> Outflow Tank The outflow tank 23 has a function of suppressing the storage or outflow of rainwater A in cooperation with the inflow tank 21 and a function as a drainage path of sewage discharged from the septic tank 30.

As shown in FIGS. 2 and 4, one side of the outflow tank 23 is adjacent to the inflow tank 21 across the overflow wall 22, and the upstream side of the outflow tank 23 is adjacent to the septic tank section 30.
The drain pipe 12 is connected to the wall surface on the most downstream side of the outflow tank 23.

<2.2.1> Rainwater Outflow Suppressing Means As shown in FIGS. 2, 4, and 10, on the downstream side of the outflow tank 23, rainwater A that temporarily stores rainwater A by suppressing outflow of rainwater A The outflow suppression means is provided.
In this example, the outflow suppression means is provided on the bottom surface on the downstream side of the outflow tank 23 at a dam wall 27 standing up to the same height as the overflow wall 22 along the transverse direction of the tank, and at the lower part of the dam wall 27. The case where it comprises with the small diameter inlet 27a which has the outflow suppression function (orifice) of rainwater A is shown.

<2.2.2> Other Outflow Control Units As other outflow control units of rainwater A, a known vortex valve known by a name such as a hydro brake may be applied.
This vortex valve regulates the flow rate by generating a swirling flow (vortex flow) in the valve due to the increased flow rate when the amount of water is large, and it flows only in the region along the circumferential surface. Sometimes it has a structure in which the flow restriction is eliminated as a linear flow without generating a swirling flow.
When the vortex valve is applied, it is provided on a part of the dam wall 27 or directly on the end of the drain pipe 12 with the dam wall 27 omitted.

<3> Septic tank section Referring to FIGS. 2, 4, and 7, the septic tank section 30 includes a sewage treatment chamber 33 adjacent to the upstream side of the outflow tank 23 with the shared wall 26 interposed therebetween, and a sewage treatment chamber 33. And a normally closed water supply valve V ₁ for receiving water from the water storage tank 20.

Together between the sedimentation chamber 36 and the outflow tank 23 are connected to be communicated through the discharge valve V ₃ with the communication passage 37 of the normally open type, between the sewage treatment chamber 33 and the settlement chamber 36 is constantly Hirakishiki It communicates via auxiliary exhaust valve V _4.

  The septic tank part 30 functions as an auxiliary water tank by receiving water supply from the outflow tank 23 at normal times, and functions as a septic tank only after receiving water from the water tank part 20 in a disaster.

<3.1> Sewage Treatment Chamber Describing in detail with reference to FIG. 7, the sewage treatment chamber 33 is defined by a pair of standing walls 31 and 32 erected on the bottom surface of the septic tank 30 in the transverse direction of the tank. The upper part is open.

<3.1.1> Standing Height of Standing Wall The standing height of the standing wall 32 on the downstream side of the sewage treatment chamber 33 is lower than the standing wall 31 on the upstream side.
The height difference between the standing walls 31 and 32 of the sewage treatment chamber 33 is to cause a water head difference in the sewage treatment chamber 33 so that the sewage flows down naturally from the upstream side to the downstream side.

<3.1.2> Suspended wall In the sewage treatment chamber 33, one or more suspending walls 35 are suspended in the transverse direction of the tank, and flowed into the sewage treatment chamber 33 through the settling chamber 36. It is possible to ensure a long contact time between the sewage and the disinfectant 34 such as a solid or liquid chlorine agent contained in the sewage treatment chamber 33.

<3.1.3> Other Purification Methods The configuration of the sewage treatment chamber 33 is not limited to this example, and other than the above, a known separation contact method, anaerobic filter bed contact method, standard activated sludge method, and the like can be applied. .
In short, even if there is no power source, it is only necessary to be able to disinfect or purify sewage in the septic tank section 30, and there are no particular restrictions on the purification principle or purification structure, and a known disinfection method or purification method can be applied.

<3.2> Sedimentation chamber The sedimentation chamber 36 is a combined storage tank that functions as a water storage tank during heavy rain or during normal times, and functions as a septic tank during a disaster.
It is desirable to place a downward gradient from the upstream side to the downstream side by placing concrete on the bottom surface of the sedimentation chamber 36 or the like.

<3.2.1> Communication path A communication path 37 is formed between the standing walls 31 and 32 constituting the sewage treatment chamber 33, and the sedimentation chamber 36 and the outflow tank 23 communicate with each other through the communication path 37. It is possible.
The reason why the sedimentation chamber 36 and the outflow tank 23 are connected to each other is to allow rainwater to flow from the outflow tank 23 so that the septic tank section 30 functions as an auxiliary water storage tank.

<3.2.2> to one end of the discharge valve communication passage 37 is provided with a discharge valve V ₃ normally open type. The discharge valve V ₃ is normally opened to maintain the communication state between the sedimentation chamber 36 and the outflow tank 23, and can be manually closed by operating the control rod 18 from the ground side when used as a septic tank in the event of a disaster. It is like that.

<3.2.3> aid the upright wall 31 of the upstream side constituting the discharge valve sewage treatment chamber 33 each other in the open-type supplementary exhaust valve V ₄ of provided always precipitated chamber through the auxiliary discharge valve V ₄ 36 And the sewage treatment chamber 33 communicate with each other.
The reason why the sedimentation chamber 36 and the sewage treatment chamber 33 are communicated with each other is that the water in the outflow tank 23 is caused to flow in and the sewage treatment chamber 33 functions as a water storage tank. This is for discharging to the sedimentation chamber 36 and then discharging to the outflow tank 23 through the communication path 37.
In this way, the auxiliary discharge valve V ₄ is normally opened and communicates between the sedimentation chamber 36 and the sewage treatment chamber 33, and is manually closed by operating the control rod 19 from the ground side in the event of a disaster. It has come to be able to do.
The auxiliary discharge valve V ₄ is not essential and may be omitted.

<3.3> Water Supply Valve A part of the shared wall 26 has a water supply valve V ₁ for supplying rainwater A in the inflow tank 21 into the septic tank 30 in the event of a disaster.
The water supply valve V ₁ is normally closed, shuts off the upstream side of the inflow tank 21 and the septic tank section 30, and can always be opened manually by operating the control rod 14 from the ground side in the event of a disaster. It is a closed manual on-off valve.

The water supply valve V ₁ may be an on-off valve that allows bidirectional flow, but is preferably a one-way valve (check valve) that prevents backflow from the settling chamber 36 toward the inflow tank 21.
The check valve function is added to the water supply valve V ₁ in order to prevent contamination of the rainwater A in the inflow tank 21 when the valve is opened, and a known one-way valve can be applied.

<4> Sewage Pipe FIG. 8 shows a proximal end portion of the sewage pipe 13.
In this example, a case where a simple toilet 17 is connected to the sewage pipe 13 will be described.
A plurality of branch pipes 15 are connected to the sewage pipe 13 extended to near the ground, and the upper opening of the branch pipe 15 is closed with a lid 16 so that foreign matter does not enter during normal times.
When the treatment facility 10 is used as a septic tank at the time of a disaster, a lid 16 is removed, and a known portable toilet 17 is installed so that waste generated from each toilet 17 can be discharged to each branch pipe 15.

<5> Manhole As shown in FIGS. 2 and 4, manholes 40 and 41 are provided in the upper part of the outflow tank 23 and the septic tank section 30, and can enter and exit the spill tank 23 or the septic tank section 30 from the ground. It is.

In FIG. 4, the control rods 14, 18, 19 connected to the water supply valve V ₁ , the discharge valve V ₃ and the auxiliary discharge valve V ₄ may be provided at positions separated from the manhole 41. It is desirable to position it.

  Next, the case where the treatment facility 10 is used as a rainwater storage or outflow suppression facility or a waste disposal facility will be described.

[Use as rainwater storage or runoff control facility]
In normal times, the treatment facility 10 functions as a rainwater A storage or outflow suppression facility as described below.

<1> Water Storage in the Inflow Tank Rainwater A that has flowed into the inflow tank 21 of the water storage tank section 20 through the inflow pipe 11 is forced by the drooping wall 25 when flowing down from the upstream side of the inflow tank 21 toward the downstream side. While being stirred, precipitation of foreign substances such as sand is suppressed by the plurality of ridges 21 a formed to protrude from the bottom surface.

  As the rainwater A flows in, the water level in the inflow tank 21 rises, and when the water level reaches the height of the overflow wall 22, the inflow tank 21 becomes full, and a certain amount of rainwater A is stored in the inflow tank 21. .

<2> Water Storage in Outflow Tank When the water level of the inflow tank 21 exceeds the overflow wall 22, the rainwater A in the inflow tank 21 flows into the adjacent outflow tank 23.
When the inflow amount of rainwater A flowing into the outflow tank 23 exceeds the amount of water discharged through the inlet 27a, the water level gradually rises in the outflow tank 23.
As the rainwater A flows in, the water level reaches the height of the weir wall 27, so that the outflow tank 23 becomes full, and a certain amount of rainwater A is temporarily stored in the outflow tank 23.
When the water level in the outflow tank 23 exceeds the weir wall 27, the overflowing rainwater A is drained through the drain pipe 12.

<3> Water storage in the septic tank section The communication between the sedimentation chamber 36 and the outflow tank 23 is via a discharge valve V ₃ and a communication passage 37 that are open.
Further, the sedimentation chamber 36 and the sewage treatment chamber 33 have a communication structure via the auxiliary discharge valve V ₄ that is open.
Therefore, when the water level in the outflow tank 23 rises gently, the rainwater A in the outflow tank 23 flows into the settling chamber 36 through the communication passage 37 and then is treated from the settling chamber 36 through the auxiliary discharge valve V _4. It flows in into the chamber 33, and the water level in the sedimentation chamber 36 and the sewage treatment chamber 33 rises equally.
The maximum water level in the septic tank 30 at this time is equal to the height of the standing wall 32 on the downstream side of the sewage treatment chamber 33.

When the water level in the outflow tank 23 rises rapidly due to concentrated torrential rain or the like, the rainwater A gets over the standing walls 31 and 32 and enters the settling chamber 36 and the sewage treatment chamber 33.
The maximum water level in the septic tank 30 at this time is equal to or higher than the height of the standing wall 32 of the overflow wall 22.
As described above, in the treatment facility 10 according to the present invention, it is possible to temporarily store a fixed amount of rainwater A not only in the inflow tank 21 and the outflow tank 23 constituting the water tank section 20 but also in the septic tank section 30. is there.

<4> About the amount of rainwater stored The treatment facility 10 according to the present invention can always store at least the rainwater A corresponding to the volume of the inflow tank 21 at least.
The maximum water storage amount of the treatment facility 10 is a water amount obtained by adding the water storage amount of the septic tank unit 30 to the water storage amount of the water storage tank unit 20.
In particular, during concentrated torrential rain, it becomes possible to store a large amount of rainwater A using the septic tank 30 as an auxiliary water storage tank, or to control the outflow, and the water storage capacity of the treatment facility 10 as a whole increases.

  The rainwater A stored in the water reservoir 20 is taken to the ground through the manhole 40 shown in FIG. 4 and used for various purposes.

[Use as a waste disposal facility]
At the time of a disaster, the treatment facility 10 also functions as a waste disposal facility as described below.

<1> Installation of a simple toilet As shown in FIG. 8, the lid 16 of each branch pipe 15 branched from the sewage pipe 13 is removed, a simple toilet 17 is installed on the ground, and filth is transferred from each simple toilet 17 to the branch pipe 15. Connect so that it can be discharged.

<2> Preparatory work for septic tank section The control rod 18 shown in FIG. 4 is operated from the ground to close the discharge valve V ₃ , and the sedimentation chamber 36 and the outflow tank 23 are shut off.
Similarly, the control rod 19 is operated from the ground to close the auxiliary discharge valve V ₄ , and the space between the sedimentation chamber 36 and the sewage treatment chamber 33 is shut off.
A predetermined disinfectant 34 is set in the sewage treatment chamber 33 in the dry state to complete the preparation work as a filth treatment facility.

<3> Water Supply to Sedimentation Chamber The control rod 14 is operated from the ground to open the water supply valve V ₁ of the common wall 26 to supply rainwater A in the inflow tank 21 into the sedimentation chamber 36.

Since the auxiliary discharge valve V ₄ is closed, the water level in the sedimentation chamber 36 rises until it becomes equal to the water level in the inflow tank 21.
When the rise in the water level in the settling chamber 36 does not exceed the upstream standing wall 31 facing the settling chamber 36, the inside of the sewage treatment chamber 33 remains dry.
When the rise in the water level in the settling chamber 36 exceeds the upstream standing wall 31, the rainwater A in the settling chamber 36 overflows and flows into the sewage treatment chamber 33.

  When supplying water to the septic tank 30, a large amount of rainwater A stored in the reservoir 20 can be used, so even if the septic tank 30 is designed to have a large capacity, it can function as a septic tank without using electricity. Sufficient water supply is possible.

<4> Storage and solid-liquid separation of filth in the settling chamber The filth supplied through the sewage pipe 13 is stored in the settling chamber 36, and the filth is separated into solid and liquid during storage. Solids settle to the bottom of the settling chamber 36.
Since the sedimentation chamber 36 has a large volume, a large amount of waste can be received over a long period of time.

<5> Disinfection treatment in sewage treatment chamber The water level in the sedimentation chamber 36 rises with the supply of filth.
When the level of sewage in the settling chamber 36 exceeds the height of the upstream standing wall 31 facing the settling chamber 36, the supernatant water of the sewage overflows and flows into the sewage treatment chamber 33.

When the inside of the sewage treatment chamber 33 is in a dry state in advance, the water level in the sewage treatment chamber 33 gradually increases due to the overflow of the sewage supernatant overflowing the upstream standing wall 31, and thereafter. The same amount of water as the inflow amount overflows from the sewage treatment chamber 33 toward the outflow tank 23.
Further, when the sewage supernatant overflows the upstream standing wall 31 and flows into the sewage treatment chamber 33 when the sewage treatment chamber 33 is filled with rainwater A in advance, the same amount as the inflow amount is obtained. Water overflows from the sewage treatment chamber 33 toward the outflow tank 23.

When passing through the sewage treatment chamber 33, the supernatant water of the sewage is forced to stir up and down in the sewage treatment chamber 33 through the hanging wall 35 and naturally flows down.
When passing through the sewage treatment chamber 33, the supernatant water of the sewage is brought into contact with a disinfectant 34 such as a chlorine agent and subjected to a predetermined disinfection treatment.
In particular, in the present invention, by using the water head difference between the upstream side and the downstream side of the sewage treatment chamber 33, the supernatant water of the sewage can flow down in one direction without using a power source.

<6> Wastewater drainage The sterilized supernatant water overflows the standing wall 32 on the downstream side and is naturally drained to the outflow tank 23 sequentially.
The sterilized supernatant water drained to the outflow tank 23 is drained to the outside through the inlet 27 a of the weir wall 27 and the drain pipe 12.

<7> Characteristics of the waste disposal facility When the treatment facility 10 according to the present invention is used as a waste disposal facility, the valve of the water supply valve V ₁ , the discharge valve V ₃ and the auxiliary discharge valve V ₄ in a situation where the power source is lost. In addition to being able to perform septic tank preparatory work with a simple operation that only performs the operation, in addition, in the filth purification process, the process of separating solid-liquid separation of the filth stored in the sedimentation chamber 36 of the septic tank 30, separation A series of purification steps from supplying the sewage supernatant water to the sewage treatment chamber 33, sterilizing the sewage supernatant water in the sewage treatment chamber 33, and draining the sterilized supernatant water It can be done without using it.

Since the filth is not stored in the simple toilet 17 but introduced into the septic tank section 30 through the sewage pipe 13 and purified, the maintenance of the simple toilet 17 is facilitated.

[Other Example 1]
Hereinafter, other embodiments of the present invention will be described with reference to the drawings. In the description, the same portions as those in the above-described embodiments will be denoted by the same reference numerals, and detailed description thereof will be omitted.

Although the above has described the case where the inflow tank 21 is formed on one side of the septic tank section 30, the inflow tank 21 may be formed on both sides of the septic tank section 30.
If the inflow tank 21 is formed on both sides of the septic tank part 30, water can be supplied from both sides of the septic tank part 30, so that stable water supply and purification over a long period of time are possible.

[Other Example 2]
In the previous embodiment, the case where the cross-sectional shape of the internal space of each tank of the water storage tank unit 20 and the septic tank unit 30 exhibits a substantially rectangular shape is shown, but the cross-sectional shape of the internal space of each tank is polygonal, circular, Or it may be elliptical or the like, and there is no particular restriction on the shape.

[Other Example 3]
Although the processing facility 10 according to the present invention may be newly constructed, the septic tank unit 30 may be integrated and expanded for the existing water storage tank unit 20.
When the septic tank section 30 is added, the existing water tank section 20 can be used effectively, and the construction period and cost burden can be reduced.

[Other Example 4]
In the previous embodiment, the case where the septic tank unit 30 and the outflow tank 23 are formed in a communication structure has been described. However, the septic tank unit 30 and the outflow tank 23 are blocked by a partition wall so that the septic tank unit 30 has a sealed structure. In some cases.
In this example, a normally closed on-off valve is provided in the partition wall so that water that has been opened and purified only at the time of a disaster can be drained to the outflow tank 23.

[Other Example 5]
The simple toilet 17 may be installed directly above the processing facility 10.
In particular, when the simple toilet 17 is provided directly above the septic tank section 30, there is an advantage that the entire length of the sewage pipe 13 can be shortened.

V ₁ ···· Water supply valve V ₂ ···· Communication valve V ₃ ··· Drain valve V ₄ ················· Auxiliary discharge valve 10 ··· for disaster Sewage treatment facility (treatment facility)
11 ... Inflow pipe 12 ... Drain pipe 13 ... Sewage pipe 14, 18, 19, ... Control rod 17 ... Simple toilet 20 ... Water tank section 21 ... Inflow tank 22 ... Overflow wall 23 ... Outflow tank 25 ... Drooping wall 30 ... Septic tank section 33 ... Sewage treatment room 36 ....... Settling chamber 40, 41 ... Manhole

Claims (6)

It is buried in the ground, functions as a rainwater storage or outflow control facility during normal times, and functions as a waste disposal facility during disasters.
A water tank section for storing or controlling rainwater,
A septic tank part that is formed adjacent to a part of the water tank part, receives water from the water tank part at the time of a disaster, and functions as a waste disposal facility,
In order to be able to supply rainwater in the water storage tank into the septic tank, a manually and normally closed water supply valve is provided on a part of the wall that shields water between the water storage tank and the septic tank,
In order to allow the rainwater in the water storage tank part to flow into and out of the septic tank part, the water tank part and the septic tank part are connected by a communication path with a manual and normally open discharge valve,
According to the valve operation of the water supply valve and the discharge valve, the septic tank part can be switched to an auxiliary water tank or a waste disposal facility,
Disaster sewage treatment facility.   The septic tank unit comprises a sewage treatment chamber, a sedimentation chamber located upstream of the sewage treatment chamber, and a water supply valve for receiving water from the water storage tank, and functions as an auxiliary water storage tank at normal times, The disaster middle sewage treatment facility according to claim 1, wherein the facility functions as a filth treatment facility upon receiving water supply from a water tank at the time of a disaster.   The water storage tank section includes an inflow tank into which rainwater flows through an inflow pipe, and an outflow tank adjacent to the inflow tank with an overflow wall in between on the downstream side of the inflow tank. Item 3. A wastewater treatment facility for disasters according to item 1 or 2.   The middle sewage treatment facility for disaster according to claim 3, wherein one or a plurality of drooping walls are suspended from a part of the inflow tank in the transverse direction of the tank.   5. For disaster use according to claim 3, wherein outflow control means for suppressing rainwater outflow and temporarily storing rainwater in the outflow tank is provided in a part of the outflow tank. Sewage treatment facility.   The disaster middle sewage treatment facility according to any one of claims 1 to 5, wherein the water storage tank section and the septic tank section are integrally formed using precast concrete, cast-in-place concrete, or a combination thereof. .

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