Method and device for high-efficiency deep denitrification of anaerobic ammonia oxidation by pure biological membrane segmented aeration AOA-SBR (anaerobic ammonia oxidation-sequencing batch reactor) with 100% drainage ratio

Through the 100% drainage ratio pure biofilm segmented aeration AOA-SBR anaerobic ammonia oxidation process, the problems of high energy consumption and large carbon source demand in traditional biological denitrification processes are solved, and the deep and efficient nitrogen removal of urban domestic sewage is achieved, reducing operating costs and increasing treatment load.

CN119707116AActive Publication Date: 2025-03-28BEIJING UNIV OF TECH
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Patent Information

Application Number
CN202510135187.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-07
Publication Date
2025-03-28
Estimated Expiration
2045-02-07

AI Technical Summary

Technical Problem

The traditional biological nitrogen removal process consumes high energy and requires a large amount of carbon sources, which increases the operating cost of sewage treatment plants and makes it difficult to effectively remove nitrogen and phosphorus in water, resulting in eutrophication of water.

Method used

The 100% drainage ratio pure biofilm segmented aeration AOA-SBR anaerobic ammonia oxidation process is adopted. The biofilm stores the internal carbon source in the anaerobic section, and short-range nitration coupled anaerobic ammonia oxidation is performed in the aerobic section, combining endogenous denitrification and anaerobic ammonia oxidation to achieve multi-path coordinated nitrogen denitrogenation.

Benefits of technology

It has achieved deep and efficient nitrogen removal and phosphorus removal of urban domestic sewage, saved aeration energy consumption and carbon source demand, reduced operating costs, and improved treatment load and removal efficiency.

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Abstract

The invention provides a 100% drainage ratio pure biological membrane segmented aeration AOA-SBR anaerobic ammonia oxidation high-efficiency deep nitrogen removal method and a 100% drainage ratio pure biological membrane segmented aeration AOA-SBR anaerobic ammonia oxidation high-efficiency deep nitrogen removal device. The reactor operates in an AOA (anaerobic-aerobic-anoxic) mode, after urban domestic sewage is pumped into the SBR, an internal carbon source is stored in an anaerobic section and phosphorus is released, a nitration reaction is carried out in an aerobic section, and an endogenous denitrification / denitrification phosphorus removal and anaerobic ammonia oxidation process is carried out in an anoxic zone along with a partial short-cut nitrification anaerobic ammonia oxidation process and a synchronous short-cut nitrification and denitrification process. The anaerobic ammonia oxidation reaction is conditionally carried out on the whole process scale through segmented aeration regulation (three times of aerobic and anoxic alternation). Meanwhile, the drainage ratio is set to be 100% by means of a pure filler structure, the nitrogen and phosphorus removal load is improved, and the influence of the last period is eliminated. According to the invention, anaerobic ammonia oxidation efficient deep denitrification can be realized without strict inhibition of nitrite oxidizing bacteria, the aeration demand of sewage treatment is reduced, and the energy consumption is reduced.
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