Denitrification strengthening device based on AOA process coupled MABR membrane

By combining AOA technology with MABR membranes and using dense, non-porous MABR membrane modules to form a layered structure, the problems of low denitrification efficiency and high cost of traditional processes are solved, achieving efficient and low-cost denitrification.

CN224226844UActive Publication Date: 2026-05-12SHAANXI WEILAN ENERGY SAVING & ENVIRONMENTAL TECH GRP CO LTD
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Patent Information

Application Number
CN202521112228.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-06-03
Publication Date
2026-05-12
Estimated Expiration
2035-06-03

AI Technical Summary

Technical Problem

In the existing technology, the nitrogen discharge standards for wastewater treatment plants are being raised, and the technical problems of traditional processes such as AAO and AOA in denitrification make it difficult to meet the increasingly stringent water quality discharge requirements. In addition, MABR membranes suffer from fouling and high costs.

Method used

By combining the traditional AOA process with MABR membranes and using dense, non-porous MABR membrane modules, a layered structure of aerobic-anoxic-anaerobic is formed. Through the design of the MABR membrane tank and sedimentation tank, the nitrifying bacteria and denitrifying bacteria can operate in separate zones, thus optimizing the nitrogen removal path.

Benefits of technology

It improves denitrification efficiency by 30%, reduces costs by 20% to 40%, solves the problems of fouling and high cost of traditional MABR membranes, and achieves efficient denitrification under low carbon-to-nitrogen ratio conditions.

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Abstract

The utility model relates to a denitrification strengthening device based on AOA process coupling MABR membrane, which comprises a water distribution system, a biological reaction system and a sedimentation tank, the water distribution system comprises a water inlet pipeline, and the water inlet pipeline is provided with two branches, namely a water distribution pipeline I and a water distribution pipeline II; the water distribution pipeline I and the water distribution pipeline II are both connected with the biological reaction system; the biological reaction system comprises an anaerobic tank, an aerobic tank and an MABR membrane tank which are communicated in sequence, and an MABR membrane assembly is arranged in the MABR membrane tank; the MABR membrane tank is communicated with the sedimentation tank, the sedimentation tank is provided with a sludge return pipe which is connected to the front end of the anaerobic tank, and the sedimentation tank is also provided with a water outlet pipeline and a sludge discharge pipeline. The AOA process is coupled with the MABR membrane, so that the occupied area and the use amount of the MABR membrane are reduced, the two denitrification processes are superposed, the denitrification effect of sewage treatment is enhanced, and the denitrification efficiency is improved by more than 30%; the anoxic tank part of the AOA process is provided with the MABR membrane tank, and the MABR membrane tank can be used for synchronously carrying out denitrification and nitrification and denitrification under the condition of low carbon nitrogen ratio, so that efficient denitrification is realized.
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