JP4570513B2 - Partition wall structure in sewage treatment tank - Google Patents

Description

  The present invention relates to a partition wall structure in a sewage treatment tank, and in particular, using a non-partition wall type sewage treatment tank used in a small-scale sewage treatment plant and the like, for the purpose of advanced treatment of sewage, The present invention relates to a partition wall structure in a sewage treatment tank in which a partition wall can be easily attached in a removable manner.

  Conventionally, when biologically treating sewage in a small-scale sewage treatment plant or the like, as shown in FIG. 5, a non-partitioning wall type sewage treatment tank such as a simple aeration tank and a sedimentation tank having a rectangular shape having a required capacity In this process, aerobic treatment and anaerobic treatment or sand settling treatment are sequentially performed in a process in which sewage flows from one end side of the sewage treatment tank and the sewage flows down in the same sewage treatment tank.

  By the way, the existing sewage treatment tank 1 used in a small-scale sewage treatment plant or the like has no partition wall inside, and the same tank is used when different treatments are performed in an aerobic process and an anaerobic process in the sewage treatment tank. Since the aerobic zone and the anaerobic zone cannot be clearly separated in the inside, the treated sewage C becomes a state in which the sewage subjected to the aerobic treatment and the sewage subjected to the anaerobic treatment are mixed with each other, and the treatment efficiency of the sewage falls At the same time, as shown in FIG. 5, there is a problem that solids such as sewage sand S are deposited on the bottom of the sewage treatment tank, particularly the tank bottom near the inflow position of the sewage.

  Also, in order to perform advanced treatment using existing sewage treatment tanks without partition walls, it is necessary to install partition walls in the sewage treatment tanks, which increases the construction costs and makes it necessary to install small-scale sewage treatment plants. Then, it had the problem that it was economically difficult.

  In view of the problems of the conventional sewage treatment tanks such as the above-mentioned conventional small-scale sewage treatment plants, the present invention can easily attach and detach the partition walls when necessary even in a simple sewage treatment tank without existing partition walls. It is an object of the present invention to provide a partition wall structure in a sewage treatment tank that can perform high-level processing efficiently by distinguishing between aerobic stirring and anaerobic processing.

  In order to achieve the above object, the partition wall structure in the sewage treatment tank of the present invention supports the detachable partition wall that is detachably mounted in the rectangular sewage treatment tank and is suspended and supported on the top surface of the sewage treatment tank. A plurality of partition wall pieces are connected to the lower part of the beam in such a manner as to be foldable via a suspension cable.

  In this case, the detachable partition wall can be configured to connect the plurality of partition wall pieces to each other via a connector.

  Moreover, a weight can be connected to the lower end of the partition wall piece at the lowest position via a suspension cable.

  According to the partition wall structure in the sewage treatment tank of the present invention, the lower part of the beam is configured such that the detachable partition wall that is detachably supported in the rectangular sewage treatment tank is supported by being hooked on the top surface of the sewage treatment tank. By connecting the multiple partition wall pieces in a foldable manner via the suspension cable, it is necessary without installing the partition wall even if an existing sewage treatment tank without a partition wall is used. Accordingly, since the partition wall can be easily installed, it is possible to perform advanced treatment even in a simple sewage treatment tank, and there is an advantage that it can be easily removed when the partition wall is unnecessary.

  In addition, the detachable partition wall can be easily folded by configuring the partition wall pieces to be connected to each other via a connector, so that the partition wall can be moved and stored with a low bulk. Furthermore, it can be installed easily and quickly simply by hooking the beam at a predetermined position of the sewage treatment tank and hanging the partition wall piece.

  In addition, when a sewage treatment tank is partitioned by a detachable partition wall by connecting a weight to the lower end of the partition wall piece at the lowest position via a suspension cable, the water pressure is applied from the side surface of the detachable partition wall. Alternatively, the lower end of the partition wall piece is fixed by a suspension cable and a weight even when subjected to flow velocity pressure, so that the removable partition wall can be prevented from shaking or even moving from its installation position to illusion. Can do.

  Hereinafter, embodiments of the partition wall structure in the sewage treatment tank of the present invention will be described with reference to the drawings.

  1 to 4 show an embodiment of an aeration tank to which the partition wall structure in the sewage treatment tank of the present invention is applied.

This aeration tank 1 is a rectangular having a required size, and in addition to the non-partition wall type aeration tank 1, the removable partition wall 2 of the present invention is installed in the non-partition wall type aeration tank as needed, thereby enabling advanced treatment of sewage. It can be divided into two chambers, a suitable aerobic zone A and an anaerobic zone B.
In addition, the size of each chamber of the aerobic zone A and the anaerobic zone B can be arbitrarily set or changed depending on the position where the removable partition wall 2 is installed with respect to the aeration tank 1, and is particularly limited. However, in the illustrated embodiment, the aeration apparatus 3 is installed in the aerobic zone A.

In the rectangular aeration tank 1, the supply sewage C1 is supplied from one end side thereof, and after the required aerobic treatment is performed by driving the aeration apparatus 3 in the aerobic zone A, the aerobic zone A After flowing into the anaerobic zone B, the treated sewage C is subjected to the necessary anaerobic treatment, and then the treated water is discharged out of the aeration tank 1.
In this case, the aeration treatment time of the supplied sewage C1 in the aerobic zone A is appropriately set depending on the amount of supplied sewage, the nature, etc., and the required agitation is performed in the aeration apparatus 3, so that the solid sludge substance is also removed from the tank bottom. It is possible to prevent precipitation and further deposition.
In this case, depending on the method for treating sewage, a flocculant or the like may be supplied to the sewage and stirred by an aeration apparatus.

As shown in FIGS. 1 to 4, the detachable partition wall 2 is hooked on the opposing tank wall top surface of the aeration tank 1 and has a length necessary to be disposed across the aeration tank 1. A beam 21, a plurality of suspension cables 24, 24 arranged so as to be suspended from the lower surface of the beam 21, and a ring-shaped connector 23 that is suspended by the suspension cable 24. And a plurality of partition wall pieces 22 that are connected to each other so as to be foldable, and a weight 26 attached to a lower position of the lowermost partition wall piece 22 via a suspension cable 25.
Thereby, since the lower position of the detachable partition wall 2 installed so as to be substantially perpendicular to the aeration tank 1 is fixed to be suspended by the weight 26, it can be swung with respect to the water pressure or flowing water pressure received from the side surface. It is possible to prevent the installation position from moving to the illusion.
It should be noted that an appropriate longitudinal length is determined by changing the number of connecting partition wall pieces 22 according to the depth of the aeration tank 1 or by adjusting the lengths of the suspension cable 24 and the suspension cable 25.

  Moreover, the inflow of the supply wastewater C1 from the aerobic zone A into which the inside of the aeration tank 1 is partitioned by the detachable partition wall 2 into the anaerobic zone B is not particularly limited. It is also possible to carry out from the gaps between the plurality of partition wall pieces 22 connected to each other so that a notch is provided in the lowermost partition wall piece 22 and flows through the notch as in the illustrated embodiment. You can also

Next, the operation of the partition wall structure in this sewage treatment tank will be described.
When the detachable partition wall 2 is installed in the non-partition wall type aeration tank 1 and the inside of the tank is divided into an aerobic zone chamber and an anaerobic zone chamber, it is carried to a predetermined position above the aeration tank 1 in a folded state. If both ends of the beam 21 are supported so as to span between the tank walls of the aeration tank facing each other, and a plurality of partition wall pieces 22 folded downward are suspended, each partition wall piece 22 is suspended. The ring expands naturally by its own weight from the ring-shaped connector 23 and hangs down substantially vertically. Then, each weight 26 is brought into contact with the tank bottom.
In this case, as shown in FIG. 2, the lengths of the upper and lower suspension cables 24 and / or suspension cables 25 are adjusted so that the plurality of partition wall pieces 22 hang substantially vertically according to the depth of the tank.

As described above, when the sewage is subjected to advanced treatment, the removable partition wall 2 is installed in the aeration tank as necessary.
When the supply sewage C1 flows from the inlet disposed at one end of the aeration tank 1, the supply sewage C1 first flows into the aerobic zone A partitioned by the removable partition wall 2 of the aeration tank 1. . Here, since the aeration apparatus 3 is installed, the supplied sewage C1 is agitated and aerated, and an aerobic treatment is performed.
The supplied sewage C1 that has been subjected to a predetermined aerobic treatment and subjected to the aerobic treatment or aerobically treated flows into the anaerobic zone B through a gap or notch of the detachable partition wall 2 and remains for a predetermined time. Anaerobic treatment is carried out by being kept stationary by stirring, whereby digestion and denitrification of sewage are carried out, and treated sewage C is obtained.

  As described above, the partition wall structure in the sewage treatment tank of the present invention has been described based on the examples. However, the present invention is not limited to the configuration described in the above examples, and as appropriate without departing from the spirit thereof. The configuration can be changed.

  The partition wall structure in the sewage treatment tank of the present invention is divided into an aerobic zone chamber and an anaerobic zone chamber by installing a detachable partition wall in a rectangular and non-partition wall type aeration tank as required. Since it has characteristics, it can be suitably used for applications in which a non-partitioning wall type simple sewage treatment tank is used for advanced treatment. For example, various tanks designed to partition the tank into two chambers. It can also be used for the purpose of partition walls.

It is a longitudinal cross-sectional view which shows one Example of the aeration tank to which the partition wall structure in the sewage treatment tank of this invention is applied. It is an external perspective view. It is an external appearance perspective view of a partition wall. It is an external appearance perspective view of the folded state. It is a longitudinal cross-sectional view of the conventional simplified sewage treatment tank.

Explanation of symbols

1 Aeration tank (sewage treatment tank)
2 Removable partition wall 21 Beam 22 Partition wall piece 23 Connector 24 Suspension cable 25 Suspension cable 26 Weight 3 Aeration device A Aerobic zone B Anaerobic zone C Supply wastewater C1 Treated wastewater

Claims (3)

  A detachable partition wall that can be detachably mounted in a rectangular sewage treatment tank and supported by hanging is attached to a lower part of the beam that is supported by hanging on the top surface of the sewage treatment tank. A partition wall structure in a wastewater treatment tank, wherein the partition wall structure is configured to be foldable.   The partition wall structure in a sewage treatment tank according to claim 1, wherein the detachable partition wall is configured to connect a plurality of partition wall pieces to each other via a connector.   3. The partition wall structure in a sewage treatment tank according to claim 1, wherein a weight is connected to the lower end of the partition wall piece at the lowest position via a suspension cable.

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