OA up-and-down partition type membrane biological reaction sewage treatment system and method

A sewage treatment system, membrane biological reaction technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, water treatment parameter control, etc., can solve the problem of low biochemical efficiency of facultative oxygen system and high energy consumption of sewage treatment system , high operating costs, to achieve the effect of improving the upper biochemical reaction rate, reducing the cost of sewage treatment, and improving the biochemical efficiency

Inactive Publication Date: 2020-08-11
江苏海之陆水处理设备有限公司
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Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of high energy consumption, high slag discharge, high operating cost and low biochemical efficiency of the aerobic system in the prior art sewage treatment system

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  • OA up-and-down partition type membrane biological reaction sewage treatment system and method
  • OA up-and-down partition type membrane biological reaction sewage treatment system and method

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Experimental program
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Effect test

Embodiment 1

[0033] This embodiment provides an upper and lower partition type membrane bioreaction sewage treatment system, such as figure 1 As shown, it includes a treatment tank 1, a filter membrane module, an upper aeration device and a lower aeration device.

[0034] Wherein, the treatment tank 1 includes an upper layer and a lower layer, the upper layer of the treatment tank 1 is an aerobic layer 11, and the lower layer of the treatment tank 1 is an anaerobic layer 12; the filter membrane module is arranged on the lower layer of the treatment tank 1 for filtering the sewage in the treatment tank 1; The upper layer aeration device includes a plurality of aeration pipes 21 , and the plurality of aeration pipes 21 are arranged at intervals on the upper layer of the treatment pool 1 along the width or length direction of the treatment pool 1 to form a water circulation in the upper layer of the treatment pool 1 . The lower aeration device is arranged under the filter membrane module.

...

Embodiment 2

[0052] The present invention provides a kind of method adopting the OA upper and lower partition type membrane bioreaction sewage treatment system of embodiment 1, comprises the following steps:

[0053] The sewage first enters the pre-hydrolysis acidification tank, undergoes anaerobic treatment, and then flows into the OA upper and lower partition membrane bioreaction sewage treatment system;

[0054] Sewage enters the upper aerobic layer where nitrification takes place, the nitrogen in the sewage is converted into nitrate and nitrite by nitrifying bacteria, and the phosphorus in the sewage is absorbed by the bacteria;

[0055] After the nitrification reaction, the upper layer of sewage gradually enters the lower anaerobic layer for denitrification reaction. The denitrification reaction converts nitrate and nitrite in the sewage into nitrogen gas, and the bacteria release free phosphine at the same time during the denitrification reaction;

[0056] After denitrification treat...

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Abstract

The invention provides an OA up-and-down partition type membrane biological reaction sewage treatment system and method. The sewage treatment system comprises a treatment tank, a filter membrane assembly, an upper-layer aeration device and a lower-layer aeration device. The upper layer of the treatment tank is an aerobic layer and the lower layer is an anaerobic layer. The aerobic layer and the anaerobic layer are arranged in an up-and-down partitioned manner, nitrogen in the sewage is converted into nitrate and nitrite through nitrobacteria treatment in the aerobic layer, and phosphorus is absorbed by bacteria. Then, the upper-layer sewage gradually enters the lower anaerobic layer to be subjected to denitrification reaction; nitrate and nitrite are converted into nitrogen through denitrification reaction, bacteria release phosphorus while denitrification is performed, free-state phosphine is in a considerable proportion in a lower-layer light shielding environment, and the nitrogen and the free-state phosphine are quickly discharged along with aeration at the bottom of the membrane pool so that the purposes of nitrogen and phosphorus removal in sewage treatment are achieved. After denitrification treatment, part of the sewage subjected to nitrogen and phosphorus removal enters a filter membrane assembly, clear water is obtained after sewage removal two-phase separation and discharged, and the remaining sewage enters the upper layer along with aeration flow to be subjected to the next circulation.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an OA upper and lower partition type membrane bioreaction sewage treatment system and method. Background technique [0002] Generally, the AO process adopted in the traditional small-scale domestic sewage treatment system is designed for the left and right partitions of the aerobic zone and the anaerobic zone. The anaerobic zone is first anaerobic and then the aerobic zone is aerated at the bottom of the aerobic zone. The aeration energy consumption is high, and the slag should be discharged regularly Phosphorus, the operating cost is high, and it cannot be operated automatically for a long time; while in the facultative anaerobic FMBR system, the macromolecular organic pollutants are gradually degraded into small molecular substances through facultative anaerobic bacteria, and finally converted into stable nitrogen, phosphine and water. of inorganic substances. Insuffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
CPCC02F3/301C02F3/308C02F2209/22
Inventor 陈向红
Owner 江苏海之陆水处理设备有限公司
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