JP4100800B2 - Septic tank - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention accommodates a carrier formed so as to be able to flow together with water to be treated in a state where microorganisms are supported, and a carrier flow tank provided with an air diffuser for flowing the carrier by supplying bubbles, and the carrier flow The present invention relates to a purification tank provided with a net-like or grid-like outflow prevention member for preventing the carrier from flowing out of the carrier flow tank at the top of the tank.
[0002]
[Prior art]
Conventionally, such septic tanks are assumed to be used in various environments, and have various configurations in order to exhibit stable water treatment performance even with respect to peak inflow where a large amount of water to be treated flows at a time. Is adopted. For example, the carrier accommodated in the carrier fluidization tank flows out of the carrier fluidization tank as the water level rises in the event of an abnormality or emergency, especially when there is a large peak inflow. In addition, since it is assumed that the function of purifying water to be treated by microorganisms is impaired, in order to avoid such a situation, the outflow prevention member is employed in the carrier flow tank. It is. Moreover, even if the carrier is pushed upward as the water level in the carrier flow tank rises due to the peak inflow at the time of abnormality or the like, the carrier does not exceed the peripheral wall of the carrier flow tank. Usually, it was provided over the entire upper surface of the carrier flow tank so that it can be reliably prevented from advancing to another tank.
[0003]
[Problems to be solved by the invention]
However, if the outflow prevention member is provided over the entire upper surface of the carrier flow tank, the outflow prevention member is usually formed of a net-like or lattice-like member, and not only from the lower side to the upper side, but also from the upper side. For example, an operation such as loading the carrier into the carrier fluidized tank or removing the carrier from the carrier fluidized tank during maintenance is performed. However, each time, the carrier flow tank has to be disassembled to form a carrier input part through which the carrier can pass from the upper side to the lower side of the outflow prevention member.
[0004]
By the way, the septic tank is generally buried in the ground, and is arranged in a situation where various internal inspection work must be performed overlooking the internal structure from the manhole. In such a case, the height difference from the manhole to the spill prevention member is not only the distance from the manhole of the septic tank body to the spill prevention member, but also the distance from the ground to the manhole of the septic tank body. Therefore, it is very difficult for a person to perform maintenance work through a manhole. For example, the work in a closed dark place is forced more than 1 m from a manhole of 80 cm.
[0005]
Further, after performing such work, if it is attempted to restore the original function of the septic tank, the assembly work is performed contrary to the dismantling work, which may increase the difficulty.
[0006]
Therefore, an object of the present invention is to provide a septic tank that can facilitate the insertion / removal of the carrier into / from the carrier fluid tank when performing maintenance work of the septic tank.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the first characteristic configuration of the septic tank of the present invention is:
In a state where microorganisms are supported, a carrier fluidized tank that contains a carrier that is formed to be flowable together with the water to be treated, and provided with an air diffuser that flows the carrier by supplying bubbles , A net-like or grid-like outflow prevention member for preventing the carrier from flowing out of the carrier flow tank is provided, an opening is provided in a part of the outflow prevention member, and the carrier flow from above the carrier flow tank. A carrier loading portion that allows the carrier to be inserted into and removed from the tank extends in a duct shape upward from the opening of the outflow prevention member, and exceeds the water level rise limit due to the peak inflow of water to be treated into the carrier flow tank . The carrier input portion is opened at a high position.
[0008]
[Function and effect]
In other words, when providing the carrier flow tank with a net-like or grid-like outflow prevention member , an opening is provided in a part of the outflow prevention member, and the carrier input portion extends in a duct shape upward from the opening of the outflow prevention member. If the carrier charging part is opened at a position higher than the water level rise limit due to the peak inflow of the water to be treated into the carrier flow tank, the carrier is moved from the upper side to the lower side of the outflow prevention member. Since the opening is formed in advance, the carrier in the carrier flow tank can be taken in and out without the need to form the opening in the outflow prevention member during maintenance. In addition, when performing this in / out operation, since it can be at a position higher than the water level rise limit due to the peak inflow of water to be treated into the carrier fluidized tank, a person has conventionally been in the septic tank to the vicinity of the water surface of the carrier fluidized tank. While there was a situation where I had to enter and work, I was able to improve workability.
[0009]
It should be noted that the carrier charging section can be opened in the vicinity of the manhole opening as much as possible to improve the workability during the replacement and replenishment of the carrier, and further, the carrier charging section can be covered with the carrier flow tank. If the carrier input part is opened at a position sufficiently higher than the water level rise limit due to the peak inflow of treated water, the carrier outflow can be sufficiently prevented, but the opening position of the carrier input part is the water level rise. When the possibility of being lower than the limit is high, it is possible to prevent the carrier from flowing out from the carrier charging part by covering the carrier charging part with a lid.
[0010]
Further, when observing the water surface of the carrier fluidized tank through the carrier charging part, it is difficult for a member that becomes a hindrance to intervene, and it is difficult for a member that obstructs observation to exist below the water surface. The water quality in the fluid tank can be easily checked.
[0011]
Therefore, the labor required for maintenance can be greatly reduced by simply changing the configuration, and a septic tank suitable for long-term use can be provided.
Moreover, the second characteristic configuration of the septic tank of the present invention is:
In a state where microorganisms are supported, a carrier fluidized tank that contains a carrier that is formed to be flowable together with the water to be treated, and provided with an air diffuser that flows the carrier by supplying bubbles, A net-like or grid-like outflow prevention member for preventing the carrier from flowing out of the carrier flow tank is provided, an opening is provided in a part of the outflow prevention member, and the carrier flow from above the carrier flow tank. A carrier loading portion that allows the carrier to be inserted into and removed from the tank extends in a duct shape upward from the opening of the outflow prevention member, and exceeds the water level rise limit due to the peak inflow of water to be treated into the carrier flow tank. The carrier input part is opened at a low position, and the carrier input part is covered with a lid to prevent the carrier from flowing out of the carrier input part.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, the septic tank of the present invention comprises an anaerobic treatment tank N, an aerobic treatment tank E, treated water tanks T1, T2, and the like from the upstream side. It consists of one chamber N1 and an anaerobic filter bed tank second chamber N2, and the aerobic treatment tank E consists of a carrier flow tank E1 and a filtration tank E2. The raw water to be treated flows from the raw water inflow part I into the first anaerobic filter bed tank N1 and downstream in the order of the anaerobic filter bed tank second chamber N2, the carrier flow tank E1, the filter tank E2, and the settling tank T2. It is decomposed while being transferred to the tank, and after passing through the disinfection tank Q provided above the treated water tank T2, it is discharged from the outlet Z to the outside of the tank.
[0013]
The anaerobic filter bed first chamber N1 is configured to be capable of storing raw water to be treated, and is capable of growing anaerobic microorganisms therein. The raw water to be treated flowing into the first anaerobic filter bed first chamber N1 is stored in the first anaerobic filter bed first chamber N1 and is anaerobically decomposed, mainly to divide coarse organic matter. And transferred from the lower part of the first anaerobic filter bed tank N1 to the lower part of the second chamber N2 of the anaerobic filter bed tank. Solids such as sludge that are not easily decomposed are stored as precipitates in the lower part of the anaerobic filter bed first chamber N1 or as scum in the upper part of the anaerobic filter bed first chamber N1.
The anaerobic filter bed second chamber N2 is provided with an anaerobic filter bed F, and anaerobic microorganisms are fixed and grown on the anaerobic filter bed F. The water to be treated which has flowed into the second chamber N2 of the anaerobic filter bed is further subjected to anaerobic treatment, decomposed to a state having almost no solid matter, and then sent to the carrier flow tank E1 by overflow. Between the anaerobic filter bed tank N and the carrier fluidized tank E1, the overflow portion 1 is configured to allow free movement of the treated water, and the overflow portion 1 is provided with a slit-like portion 2 to provide the treated water. The carrier and sludge in the carrier fluid tank E1 can be prevented from flowing back.
[0014]
The carrier fluid tank E1 accommodates and holds a carrier C1 that is formed so as to be able to flow together with the water to be treated in a state where microorganisms are supported, and is provided with an air diffuser D1 that allows the carrier to flow by supplying bubbles. An air diffuser is provided to allow the carrier C1 to flow in the carrier flow tank E1 by supplying bubbles from the air diffuser D1. With such a configuration, the water to be treated flowing into the carrier fluid tank E1 is purified by aerobic decomposition by aerobic microorganisms. The treated water that has undergone such treatment is transferred to the filtration tank E2 through the transfer wall portion 3 provided in the first partition wall W1 that partitions the carrier flow tank E1 and the adjacent filtration tank E2.
The advection wall portion 3 is formed in a lattice shape or a slit shape, and is configured to prevent the advancing of the carrier but to permit the advancing of sludge and water to be treated.
[0015]
The filtration tank E2 is configured by filling a carrier C2 having a specific gravity greater than that of water to a predetermined height at a high density. Moreover, the filtration wall part which distribute | circulates to-be-processed water freely in the position lower than the said predetermined height of the 2nd partition W2 which separates the said filtration tank E2 and the said treated water tank T1 provided adjacent to the said filtration tank E2. 4 is formed. As a result, the water to be treated containing sludge that is transferred to the filtration tank E2 is filtered through the deposited filtration layer B on which the carrier C2 is deposited, so that the solid water is hardly contained, and the adjacent treatment is performed. It is transferred to the water tank T1. The second partition wall W2 is connected to the septic tank side wall at the upper end, and the treated water tank T1 is arranged to be hidden under the filtration tank E2 in a plan view.
The filtration wall portion 4 is formed in a lattice shape or a slit shape, and prevents the advancing of the carrier C2, but allows the advancing of sludge and water to be treated.
Furthermore, an aeration pipe D2 as a stirring device for agitating the inside of the filtration tank E2 by agitating the carrier C2 is provided below the constructed filtration layer B, and the load on the septic tank such as at night is reduced. In the time zone when the inflow is small, the carrier is regenerated by performing aeration from the diffusion tube D2.
In addition, air diffuses toward the advection wall portion 3 in the aeration tube D2, and bubbles due to the aeration pass through the advection wall portion 3, and along the advection wall portion 3 on the carrier flow tank E1 side. The advection wall diffuser Da configured to be raised, and similarly diffused toward the filtration wall, and air bubbles due to the aeration pass through the filtration wall 4 and the treatment water tank T1 side As the structure which provides the filtration wall part aeration part Db comprised so that it can be raised along the filtration wall part 4, and wash | cleans the advection wall part 3 and the filtration wall part 4, respectively, and prevents clogging etc. is there.
[0016]
Here, the advection wall part 3 and the filtration wall part 4 have a predetermined upper end height of the deposition filtration layer B so that the water to be treated must be allowed to flow after passing a predetermined distance of the deposition filtration layer B. What is necessary is just the structure which is provided in the position lower than height, accept | permits the advection of to-be-processed water, and enables filtration of the to-be-processed water in the said deposition filtration layer B.
Each of the carriers C1 and C2 is formed to have a specific gravity of 1 to 1.2 that can flow together with the water to be treated.
[0017]
Further, as shown in FIGS. 2 and 3, the treated water tank T1 is provided with an air lift pump A for transferring the treated water to the anaerobic filter bed first chamber N1, which is generated by the regeneration of the carrier C2. The sludge is configured to be transferred together with the water to be treated from the treated water tank T1 to the anaerobic filter bed tank first chamber N1.
[0018]
Further, even if a large amount of water to be treated flows into the septic tank above the steady water level of the carrier flow tank E1 and the filtration tank E2, the carriers C1 and C2 in the tank flow out so as not to flow into other tanks. The outflow prevention member 10 to be prevented is composed of mesh members 11 and 11 having finer meshes than the carriers C1 and C2, and is divided into a plurality of parts and can be taken out from the manhole H. The outflow prevention member 10 has an opening 12 in a part thereof, and a duct-shaped carrier charging portion 13 is extended upward .
Thereby, even if it diffuses in the said carrier flow tank E1 and the filtration tank E2 and forms the convection of to-be-processed water, the flow is formed so that it may flow smoothly, without being inhibited by the said outflow prevention member 10. The In addition, when the carriers C1 and C2 are filled in the carrier flow tank E1 and the filtration tank E2 or when the carriers C1 and C2 are exchanged, they can be easily charged and sucked through the carrier loading part 13. It becomes.
[0019]
Further, the outflow prevention member 10 is provided with a diffuser tube insertion hole 14 that allows the diffuser tube D1 to be inserted and removed, and the air supply tube D1a connected to the diffuser tube D1 includes the diffuser tube D1. With a position fixed in the carrier flow tank E1, a dam mechanism is configured to block the carrier outflow by integrally connecting a lid member 15 that covers the diffuser tube insertion hole. The air diffusion pipe D1 and the air supply pipe for the air lift pump A are gathered in the upper space of the filtration tank, and the upper pipe of the carrier flow tank E1 is arranged to a minimum.
Thereby, even when it is necessary to take the diffuser tube out of the septic tank, for example, when the diffuser tube D1 is maintained, the diffuser tube can be easily inserted and removed through the diffuser tube insertion hole 14, and the outflow The work can be performed with almost no disassembly of the prevention member.
[0020]
The treatment water tank T1, the only clean supernatant portion having passed through the filtration tank E2 allows discharged to the outside flows into the disinfecting chamber Q is provided on top of the settling tank T2, disinfected in contact with a solid disinfectant After that, it is discharged out of the tank.
[0021]
As a result, the carrier fluid tank E1 and the filtration tank E2 are arranged in a state in which the upper side is provided in an open state and the carrier can be easily replaced and the water quality can be confirmed from the upper space. Without disassembling the inside of the septic tank, it can be easily performed from above via the manhole H provided in the septic tank.
[0022]
[Another embodiment]
In the previous embodiment, the structure in which the advection wall portion 3 and the filtration wall portion 4 are integrally formed with the first and second partition walls W1 and W2 is shown. The first and second partition walls W1 and W2 provided with the advection wall portion 3 or the filtration wall portion 4 may be detachably provided with respect to the septic tank. good. Moreover, although each aerobic processing tank E1, E2 was provided in parallel in the width direction in FIG. 1, the arrangement | sequence in planar view, such as providing in series in a longitudinal direction, is not restricted to the above-mentioned thing.
[0023]
The outflow prevention member 10 is preferably provided above the steady water level of the carrier flow tank, but may be provided below the steady water level, and at least the opening 12 is provided in the steady water level. Any form that opens upward from the water level may be used.
[0024]
Further, when a lid is provided on the opening 12, a carrier pressing portion is provided at a position that prevents the carrier from entering a duct-like portion formed between the outflow prevention member 10 and the upper end side of the opening 12. It is desirable to be connected continuously.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a septic tank according to the present invention. FIG. 2 is a perspective view of essential parts of a septic tank according to the present invention .
C1 carrier D1 air diffuser E1 carrier flow tank 10 outflow prevention member
12 Opening of outflow prevention member 13 Carrier input part

Claims (2)

In a state where microorganisms are supported, a carrier fluidized tank that contains a carrier that is formed to be flowable together with the water to be treated, and provided with an air diffuser that flows the carrier by supplying bubbles , A septic tank provided with a net-like or lattice-like outflow prevention member for preventing the carrier from flowing out of the carrier flow tank,
An opening is provided in a part of the outflow prevention member, and a carrier loading portion that allows the carrier to be inserted into and removed from the upper side of the carrier flow tank into a duct shape upward from the opening of the outflow prevention member. A septic tank that is extended and has the carrier input portion opened at a position higher than a water level rise limit due to a peak inflow of water to be treated into the carrier flow tank. In a state where microorganisms are supported, a carrier fluidized tank containing a carrier formed to be flowable together with the water to be treated and provided with an air diffuser for fluidizing the carrier by supplying bubbles is provided above the carrier fluidized tank. A purification tank provided with a net-like or grid-like outflow prevention member for preventing the carrier from flowing out of the carrier flow tank,
An opening is provided in a part of the outflow prevention member, and a carrier loading portion that allows the carrier to be inserted into and removed from the upper side of the carrier flow tank into a duct shape upward from the opening of the outflow prevention member. Extending and opening the carrier charging part at a position lower than the water level rise limit due to the peak inflow of the water to be treated into the carrier flow tank, and covering the carrier charging part with a lid, the carrier from the carrier charging part A septic tank that prevents spillage.

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