Process for removing bio foam in sewage disposal process by activated sludge process

An activated sludge method and sewage treatment technology, applied in the field of environmental engineering water treatment, can solve the problems of adding chemical agents, affecting denitrification, and deteriorating effluent quality

Inactive Publication Date: 2010-06-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to aim at the biological foam problem commonly existing in the sewage treatment plant that adopts activated sludge process at present, and make the operation, operation and control of the sewage treatment plant all produce certain difficulty, the effluent water quality deteriorates during the biological foam generation; In order to overcome The existing activated sludge sewage treatment plants have problems such as high cost, complex operation, poor effect, insufficient addition of chemical agents and insufficient influence on denitrification in the biological foam treatment. The present invention provides an activated sewage Method for Removing Biological Foam in Mud Sewage Treatment Process

Method used

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  • Process for removing bio foam in sewage disposal process by activated sludge process
  • Process for removing bio foam in sewage disposal process by activated sludge process
  • Process for removing bio foam in sewage disposal process by activated sludge process

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Effect test

Embodiment 1

[0022] An activated sludge sewage treatment process, the activated sludge sewage treatment process includes a pre-anoxic reaction unit, anaerobic reaction unit, anoxic reaction unit, suspended packing aeration tank reaction unit and aerobic reaction unit, each reaction The units are all equipped with submersible mixers, and the reaction unit of the suspended filler aeration tank is put into 10m 3 The filling ratio is 30% of the total volume of the reaction unit, and the treated water volume of the activated sludge sewage treatment process sewage plant is 280m 3 / d, operate according to the process design parameters with an internal reflux ratio of 200% and an external reflux ratio of 100%. The sludge age of the process is 10 days, and the sludge concentration is 4500mg / L. After the biofoam is generated, the microscopic examination shows that the filamentous bacteria are abundant.

[0023] The specific steps of this process to remove biofoam are as follows:

[0024] (1) After...

Embodiment 2

[0030] An activated sludge sewage treatment process, the activated sludge sewage treatment process includes a pre-anoxic reaction unit, anaerobic reaction unit, anoxic reaction unit, suspended packing aeration tank reaction unit and aerobic reaction unit, each reaction The units are all equipped with submersible mixers, and the reaction unit of the suspended filler aeration tank is put into 10m 3 The filling ratio is 30% of the total volume of the reaction unit, and the treated water volume of the activated sludge sewage treatment process sewage plant is 280m 3 / d, operate according to the process design parameters with an internal reflux ratio of 200% and an external reflux ratio of 100%. The sludge age of the process is 10 days, and the sludge concentration is 4500mg / L. After the biofoam is generated, the microscopic examination shows that the filamentous bacteria are abundant.

[0031] The specific steps of this process to remove biofoam are as follows:

[0032] (1) Adjust...

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Abstract

The invention relates to a method for eliminating biological foam in a sewage treatment process by using an activated sludge method, and belongs to the water treatment technical field of the environment engineering. The method has technical characteristics that the agitation strength of the agitators of a hypoxic preconditioning reaction unit, an anaerobic reaction unit and a hypoxic reaction unitis further influenced through closing or adjusting the frequency of the submersible agitators under the condition that all reaction units are under operation in the activated sludge process sewage treatment process, thereby playing the function in reducing the concentration of sludge in a biological foam generating area. Part of materials in an suspended filling material aeration tank reaction unit are reversely flowed to a hypoxic reaction unit; after the biological foam is eliminated, the filling materials flowed reversely are obtained and applied to the suspended filling material aerationtank reaction unit again after being subjected to chemical sterilization treatment. Compared with the prior art, the method has the advantages of saved cost, easy operation, and obvious effect of eliminating the biological foam, and short used time.

Description

technical field [0001] The invention belongs to the technical field of water treatment in environmental engineering, in particular to a method for removing biological foam in an activated sludge sewage treatment process. Background technique [0002] Activated sludge process is currently the most widely used biological treatment method in sewage treatment plants, and it plays an important role in the process of sewage treatment. However, many sewage plants operating with activated sludge method face the problem of biofoam during the operation process, which makes the process unable to operate normally. The sewage plant needs to invest a lot of manpower and material resources to deal with the biofoam, which directly plagues the normal operation of the sewage plant. [0003] The main cause of biofoam is that the filamentous microorganisms in the activated sludge proliferate abnormally in the aeration tank. Generally, the biofoam is yellowish brown, strong in viscosity, and car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
Inventor 汪诚文杨波赵雪锋
Owner TSINGHUA UNIV
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