JPS6246473Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a combined treatment septic tank having a chamber in the middle of a sludge return pipe.

[Background technology]

In combined treatment septic tanks, the Ministry of Construction's notification stipulates that the sludge that has settled at the bottom of the sedimentation chamber must be pulled out and returned to the sedimentation separation chamber, etc. For this reason, it is necessary to install a sludge return pipe from the settling chamber to the sediment separation room, etc., but in order to prevent clogging and facilitate cleaning, a pipe is required in the middle of the sludge return pipe. However, conventionally, the above-mentioned chambers are made of concrete and buried underground, separate from the septic tank, but because these chambers are buried in the backfilling soil of the septic tank, the backfilling soil of the septic tank has not hardened sufficiently. This will cause the pipe to sink and change the slope of the pipe, causing problems. Furthermore, if the backfill earth and sand were to be sufficiently compacted, the construction period would take a long time. Moreover, when forming the upper slab horizontally, the height of the manhole at the top of the septic tank and the height of the manhole at the top of the church hall had to be aligned, which caused the problem of complicated construction.

[Purpose of invention]

The present invention has been devised in view of the above points, and its purpose is to provide a combined treatment septic tank that does not change the slope of the sludge return pipe and can be easily constructed.

[Disclosure of invention]

The combined treatment septic tank of the present invention has a chamber 4 in the middle of a sludge return pipe 3 that returns sludge from a settling chamber 1 to a sedimentation separation chamber 2, and this chamber 4 is integrally provided in a tank body 5. With such a configuration, the problems of the prior art are solved and the above-mentioned purpose of the present invention is achieved.

The present invention will be explained in detail below with reference to Examples. FIG. 1 shows a combined treatment septic tank, in which a sedimentation separation chamber 2, a contact aeration chamber 6, a sedimentation chamber 1, a discharge pump chamber 7, and a disinfection chamber 8 are provided in a tank body 5. Here, the sedimentation separation chamber 2 is divided into a first sedimentation separation chamber 2a and a second sedimentation separation chamber 2b, and the contact aeration chamber 6 is divided into a first aeration chamber 6a and a second aeration chamber 6b. 9 in the diagram
is an inflow pipe that allows wastewater to flow from the outside into the first precipitation separation chamber 2a, and the wastewater flows from the first precipitation separation chamber 2a to the second precipitation separation chamber 2b, the first aeration chamber 6b, the second aeration chamber 6b, and the precipitation chamber 1. The information is processed sequentially. 3 in the figure is a sludge return pipe for returning sludge from the settling chamber 1 to the sedimentation separation chamber 2. A chamber 4 is provided in the middle of the sludge return tube 3, and this chamber 4 is integrated into the tank body 5. It is provided in The tank body 5 has a horizontally long cylindrical shape, and the arcuate lower part of the chamber 4 is integrally fixed to the arcuate surface portion of the tank body 5. As shown in FIG. 3, the chamber 4 is provided with a partition plate 10 in line with the bottom of the sludge return pipe 3.
It is made so that there is no accumulation inside. In the figure, reference numeral 11 denotes a step provided at the bottom of the hall 4, and the partition plate 10 is placed on this step 11. A manhole cover 17 for the clubhouse is provided at the upper opening of the clubhouse 4, and the manhole cover 17 is opened for inspection. Here, the level of the manhole cover 17 for the office is set at the same level as the cover 19 of the other manhole 18 provided in the tank body 5. 12 is a return port provided at the tip of the sludge return pipe 3. Also, 13 is an air lift pump, 14 is a scum schema, 1
5 is a sludge return pump, and 16 is a peeled sludge return device.

[Effect of idea]

In the case of the present invention, as described above, a hole is provided in the middle of the sludge return pipe that returns sludge from the settling chamber to the sedimentation separation chamber, and this hole is integrated into the tank body. The construction period can be shortened because there is no need to construct a chamber separately from the construction of the tank body, and since the chamber is integrated into the tank body, a constant performance can be ensured without changing the flow gradient of the sludge return pipe. Furthermore, the heights of the manhole at the top of the septic tank and the manhole at the top of the meeting place can be made to correspond to each other, and the construction can be easily carried out when forming the upper slab horizontally.

[Brief description of the drawings]

Fig. 1 is a partially cut-away schematic overall perspective view of the present invention, Fig. 2 is a perspective view of the chamber portion of the same, and Fig. 3 is a partially cut-away perspective view of the same. 3 is a sedimentation separation chamber, 3 is a sludge return pipe, 4 is a chamber, and 5 is a tank body.

Claims (1)

[Scope of utility model registration request] This is a combined treatment septic tank in which a chamber is provided in the middle of the sludge return pipe that returns sludge from the settling chamber to the sedimentation separation chamber, and this chamber is integrated into the tank body.