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Moving-bed biofilm oxidation ditch

A moving bed biofilm and oxidation ditch technology, which is applied in the field of high-efficiency moving bed biofilm oxidation ditch, can solve the problems of limited denitrification and phosphorus removal effect of the oxidation ditch, and large floor area, so as to improve the efficiency of oxygen mass transfer and utilization, occupy The effect of small area and long residence time

Inactive Publication Date: 2010-07-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a moving bed biofilm oxidation ditch combined with MBBR, which solves the problem that the oxidation ditch has limited denitrification and phosphorus removal effect and occupies a large area. play a greater role in processing

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] like Figure 1-3 The shown mechanical aeration moving bed biofilm oxidation ditch, the oxidation ditch adopts a single ditch type, including a ditch body, the ditch body is provided with a water inlet 1, a water outlet 10 and a mud outlet 2, and the ditch body is provided with a guide wall 3 And the aeration rotary brush 6, the ditch is filled with movable filler 11, the aeration rotary brush 6 is provided with a rotary brush screen 7, and the water outlet 10 is provided with a water outlet screen 9.

[0028] The mobile filler 11 is a hollow cylindrical filler made of polypropylene with a density of 0.98g / cm 3 , the height-diameter ratio is 0.5, and the specific surface area is 500m 2 / m 3 .

[0029] The oxidation ditch is aerated by the aeration rotary brush 6. In order to make the moving filler 11 and the mud-water mixture circulate in the ditch body, a rotary brush screen 7 is set outside the aeration rotary brush 6. 15-25cm.

[0030] The water outlet screen 9 i...

Embodiment 2

[0037] like Figure 4-6 The shown blast aeration moving bed biofilm oxidation ditch, the oxidation ditch adopts a single ditch type, including a ditch body, the ditch body is provided with a water inlet 1, a water outlet 10 and a mud outlet 2, and the ditch body is provided with a diversion wall 3. The flow propeller 12 and the microporous aeration pipe 13 are filled with movable fillers 11 in the ditch. The water outlet 10 is provided with a water outlet screen 9, and the water outlet screen 9 is placed in the pool of the water outlet 10.

[0038] The movable filler 11 is a hollow cylindrical filler made of polyethylene with a density of 0.95g / cm 3 , the height-diameter ratio is 0.3, and the specific surface area is 300m 2 / m 3 .

[0039] On the inner side of the pool of the mud discharge port 2, there is a mud discharge screen. The mud discharge screen is made into a cylindrical shape, and one end is open to connect with the mud discharge pipeline, and the other end is bl...

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Abstract

The invention discloses a moving-bed biofilm oxidation ditch, comprising a ditch body which is provided with a water inlet, a water outlet and a sludge discharge outlet, wherein the ditch body is internally provided with a guide wall and an aeration device, moving filler is filled in the ditch body, a water outlet screen mesh is arranged at the water outlet part, and a sludge discharge screen mesh is arranged at the sludge discharge outlet. The moving filler flows together with the sludge-water mixed liquid in the oxidation ditch so as to improve the sludge concentration in the oxidation ditch, thereby improving the processing efficiency of the oxidation ditch. The moving-bed biofilm oxidation ditch has the characteristics that the floor area of the oxidation ditch is less than that of the conventional oxidation ditch, the sludge concentration is obviously improved, the operating cost is lowered, the operation is simple and convenient, the effluent quality is stable, and the nitrogen and phosphorus removal effect is good.

Description

technical field [0001] The invention relates to a high-efficiency moving bed biological membrane oxidation ditch (MBBR-OD) for waste water treatment, which is suitable for the treatment of industrial waste water and domestic sewage. Background technique [0002] Oxidation ditch is a commonly used equipment for denitrification and phosphorus removal. It mainly uses an aeration and agitation device with direction control to push the mixed liquid to circulate in a closed channel along the horizontal direction. It has the characteristics of a complete mixing reactor and a push flow reactor, so the oxidation ditch process is simple. , convenient operation and management, stable water quality. However, the traditional oxidation ditch has the disadvantages of limited denitrification and phosphorus removal, and a large area. Therefore, many researchers have improved the oxidation ditch. Such as the inversion A of the deep groove air-lift push-flow cycle of the authorized announcem...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/10C02F3/18
CPCY02W10/10
Inventor 杨岳平高冲叶国祥
Owner ZHEJIANG UNIV
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