JP2543834Y2 - Sewage treatment equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a sewage treatment apparatus,
More specifically, the present invention relates to an improvement of a sewage treatment apparatus for performing a high-concentration activated sludge treatment such as a fluidized bed.

[0002]

2. Description of the Related Art Conventionally, small-scale merger septic tanks for home use include:
Known is a sewage purification tank having a first-stage anaerobic treatment tank, a first-stage treatment tank composed of the second tank, and an aerobic treatment tank, a sedimentation tank, and a second-stage treatment tank composed of a disinfection tank. It is. The contact material of the aerobic treatment tank includes an installation type and a fluidized bed, and the latter fluidized bed has an advantage that the contact area with the water to be treated is very large, so that the purification efficiency is good and suitable for a small combined purification tank and the like. Having.

[0003]

However, in the septic tank using the fluidized bed, when the sewage is transferred to the next chamber, the fluidized bed may also be transferred at the same time, resulting in a decrease in the fluidized bed carrier in the aerobic treatment tank. At the same time, there is a drawback that the SS in the next room increases. The drawback is that a filter can be attached to the sewage inflow port from the aerobic treatment tank to the sedimentation tank.However, since aerobic microorganisms also adhere to this filter, clogging is likely to occur. There were drawbacks that were hindered within a very short period of time.

It is also conceivable to dispose a separation membrane module made of a ceramic membrane in a solid-liquid separation tank after high-concentration activated sludge treatment, and to perform solid-liquid separation using an externally installed suction pump. There is a drawback that the installation volume is separately required, and that the construction work such as piping to the suction pump when installing the sewage treatment apparatus is also required. Therefore, although the fluidized bed tank is very effective for the purification treatment of the sewage, there is a problem that the maintenance management becomes very troublesome and it is difficult to adopt it actively.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention considers the case where sewage treatment is performed using high-concentration activated sludge.
It is an object of the present invention to provide an improved sewage treatment apparatus capable of reliably preventing the sludge from advancing, reducing the installation volume of the sewage treatment apparatus, and saving the trouble of maintenance.

[0006]

That is, the sewage treatment apparatus of the present invention comprises a separation membrane module, a permeated water header pipe of the separation membrane module, and a suction port in a high concentration activated sludge treatment tank.
A suction submersible pump combined and submerged below the water surface is integrally provided, and a frame having a diffuser is disposed on the lower surface of the separation membrane module so as to be able to be taken out. Sewage drainage pipe is connected to the sewage pipe.

[0007]

Next, an embodiment of the present invention will be described. FIG. 1 is a sectional view of an embodiment of the present invention. The sewage treatment apparatus 1 of the present invention includes a separation membrane module 5 and permeated water of the separation membrane module in a high-concentration activated sludge treatment tank 2 such as a fluidized bed tank.
Connect the header tube 5A and the suction port 4B and submerge under the water surface
And a frame 6 having an air diffuser 8 on the lower surface of the separation membrane module 5 so as to be able to be taken out. The drain pipe 4A is configured to be connectable.

As the above-mentioned separation membrane module, in addition to a suction type ceramic separation module, a microporous tube made of glass or plastic and having an opening of 0.1 to 60 μm (preferably 0.1 to 10 μm) is used as a suction type separation membrane. A separation membrane module is used. In the drawing, reference numeral 9 denotes a blower for supplying air to the air diffuser 8, and the blower 9 is connected to an air supply pipe 9B into the separation membrane module 5 via a valve 9A so that a regular backwash can be performed. Can also.

[0009]

In the present invention, the sewage after the sewage purification treatment in the high-concentration activated sludge treatment tank 2 is supplied to a suction submersible pump 4.
Is discharged to the outside through the separation membrane module 5 by the suction force. In this case, although the treated water discharged to the outside depends on the density of the separation membrane module 5, suspended matter such as peeled sludge is completely removed from the discharged water and sufficiently purified water is discharged.

Further, since the suction pump 4 is integrally provided with the separation membrane module 5, it is not necessary to separately provide the pump outside the septic tank. Further, the separation membrane module 5
Since the diffuser 7 is provided on the lower surface, the decomposition of the organic matter by the aerobic microorganisms in the high-concentration activated sludge treatment tank 2 is performed very efficiently. In addition, the air supply pipe 9 from the blower 9
If forced air supply is performed via B, backwashing of the separation membrane module 5 is also possible.

[0011]

As described above, in the sewage treatment apparatus of the present invention, the flow of activated sludge in the fluidized-bed tank is reliably prevented by the separation membrane module, and the separation membrane module can be periodically backwashed. As a result, the wastewater can be efficiently purified for a long period of time without substantially clogging. Furthermore, since the separation membrane module, the suction pump and the air diffuser are integrally supported by the frame and can be taken out of and inside the sewage treatment device, there is no need to provide a pump installation volume outside the sewage treatment device, thus saving space. In addition, the installation can be performed only by taking the frame in and out, so that the sewage treatment apparatus has a practical effect that the assembly, maintenance and inspection thereof are very easy. The suction pump is on the water surface
Because it is located below, air enters the pump even when stopped
Has the effect of enabling stable processing at restart without the need for
You.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewage treatment apparatus 2 High concentration activated sludge tank 4 Suction pump 5 Membrane separation apparatus 6 Frame

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical indication location C02F 3/00 C02F 3 / 00F (72) Inventor Hiroyoshi Nakajima 2 Takamatsu, Kosai-cho, Koka-gun, Shiga Prefecture (1) Inside the Kubota Shiga Plant, Ltd. (72) Inventor Dai Dai Harada Inside the Kubota Shiga Plant, 2 at Takamatsu, Kosai-cho, Koga-gun, Shiga Prefecture (56) References JP-A-3-254896 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A separation membrane module, a permeated water header tube of the separation membrane module, and suction in a high concentration activated sludge treatment tank.
A suction pump submerged under the water surface with an integrated mouth, and a frame having an air diffuser at the lower surface of the separation membrane module is disposed so as to be able to be taken out; A sewage treatment apparatus characterized in that a sewage drain pipe to the outside of the apparatus can be connected.