Device and method for integrated anammox autotrophic denitrification biofilm reactor

Abstract

An integral anaerobic ammonium oxidation autotrophic nitrogen removal biomembrane reactor device and a method thereof belong to the technical field of urban sewage biological treatment. The device comprises a raw water tank, an AAO reactor, a secondary sedimentation tank, an intermediate water pool and an integral anaerobic ammonium oxidation autotrophic nitrogen removal biomembrane reactor. The anaerobic area of the AAO reactor is connected with the raw water tank, and the aerobic area of the AAO reactor is connected with the secondary sedimentation tank; and the secondary sedimentation tank is connected with the intermediate water pool, and the intermediate water pool is connected with the integral anaerobic ammonium oxidation autotrophic nitrogen removal biomembrane reactor. Denitrifying phosphorus accumulating bacteria become dominant bacteria in the AAO reactor through technologic adjustment, so ammonia-oxidizing bacteria and anaerobic ammonia-oxidizing bacteria become the dominant bacteria in the integral anaerobic ammonium oxidation autotrophic nitrogen removal biomembrane reactor, and the separation of the phosphorus accumulating bacteria from the ammonia-oxidizing bacteria and anaerobic ammonia-oxidizing bacteria is realized; and the AAO reactor can remove organic matters from raw water, so the influences of the organic matters on the anaerobic ammonia-oxidizing bacteria in the integral anaerobic ammonium oxidation autotrophic nitrogen removal biomembrane reactor are avoided. The energy saving, the stability, the high-efficiency nitrogen and phosphorus removal and the sludge reduction of a system are finally realized.

Description

technical field [0001] The invention relates to an integrated anammox autotrophic denitrification biofilm reactor device and a method thereof, belonging to the technical field of urban sewage biological treatment. Background technique [0002] With the change of people's eating habits, the composition and proportion of urban sewage are gradually changing, and low C / N ratio urban sewage is becoming more and more common. At present, most sewage treatment plants in my country are facing the problem of insufficient raw water carbon sources. Seriously affect the treatment effect of sewage treatment plants. If a large amount of external carbon sources, such as sodium acetate, etc. are added, it will bring huge operating costs. Moreover, a large amount of excess sludge produced by the sewage plant cannot be properly treated, causing significant environmental problems. [0003] In the traditional AAO denitrification and phosphorus removal system, phosphorus accumulating bacteria, d...

AI Technical Summary

Problems solved by technology

[0002] With the change of people's eating habits, the composition and proportion of urban sewage are gradually changing, and low C / N ratio urban sewage is becoming more and more common. At present, most sewage treatment plants in my country are facing the problem of insufficient raw water carbon sources. Seriously affect the treatment effect of sewage treatment plants

If a large amount of external carbon sources, such as sodium acetate, etc. are added, it will bring huge operating costs

Moreover, a large amount of excess sludge produced by the sewage plant cannot be properly treated, causing significant environmental problems

[0003] In the traditional AAO denitrification and phosphorus removal system, phosphorus accumulating bacteria, denitrifying bacteria and nitrifying bacteria coexist, and there are contradictions in sludge age and competition in carbon sources. Low, aeration energy consumption is large, it is difficult to obtain a good effect of nitrogen and phosphorus removal in a single biochemical system at the same time; moreover, the nitrate nitrogen in the effluent of the aerobic zone is prone to denitrification in the secondary sedimentation tank, which makes the sludge float , affecting the normal operation of the system

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