CN-224226844-U - Denitrification strengthening device based on AOA technology coupling MABR membrane

Abstract

The utility model relates to a denitrification strengthening device based on an AOA technology coupling MABR membrane, which comprises a water distribution system, a biological reaction system and a sedimentation tank, wherein the water distribution system comprises a water inlet pipe, the water inlet pipe is provided with two branches, a water distribution pipe I and a water distribution pipe II, the water distribution pipe I and the water distribution pipe II are connected with the biological reaction system, the biological reaction system comprises an anaerobic tank, an aerobic tank and a MABR membrane tank which are sequentially communicated, the MABR membrane tank is internally provided with a MABR membrane assembly, the MABR membrane tank is communicated with the sedimentation tank, a sludge return pipe is arranged on the sedimentation tank and is connected to the front end of the anaerobic tank, and a water outlet pipe and a sludge discharge pipe are also arranged on the sedimentation tank. The utility model uses AOA technology to couple MABR membrane, reduces the occupied area and the usage amount of the MABR membrane, and strengthens the denitrification effect of sewage treatment by superposition of two denitrification technologies, the denitrification efficiency is improved by more than 30 percent, and the MABR membrane tank is arranged at the anoxic tank part of the AOA technology, so that the MABR membrane component can be used for synchronously carrying out denitrification and nitrification denitrification under the condition of low carbon nitrogen ratio, thereby realizing high-efficiency denitrification.

Inventors

• ZHANG CHUNHAO
• WANG WEI
• LEI JIANG
• ZHENG PEINAN

Assignees

• 陕西蔚蓝节能环境科技集团有限责任公司

Dates

Publication Date

20260512

Application Date

20250603

Claims (5)

1. 1. A denitrification strengthening device based on an AOA technology coupling MABR membrane comprises a water distribution system, a biological reaction system and a sedimentation tank, and is characterized in that the water distribution system comprises a water inlet pipeline (1), wherein the water inlet pipeline (1) is provided with two branches, a water distribution pipeline I (2) and a water distribution pipeline II (3), and the water distribution pipeline I (2) and the water distribution pipeline II (3) are connected with the biological reaction system; The biological reaction system comprises an anaerobic tank (4), an aerobic tank (5) and an MABR membrane tank (6) which are sequentially communicated, wherein an MABR membrane component (11) is arranged in the MABR membrane tank (6); The MABR membrane pond (6) is communicated with the sedimentation tank (7), a sludge return pipe (8) is arranged on the sedimentation tank (7) and is connected to the front end of the anaerobic tank (4), and a water outlet pipeline (10) and a sludge discharge pipeline (9) are also arranged on the sedimentation tank (7).
2. 2. The denitrification strengthening apparatus based on AOA process coupling MABR membrane as claimed in claim 1, wherein the water distribution pipeline I (2) is connected to the anaerobic tank (4), and the water distribution pipeline II (3) is connected to the MABR membrane tank (6).
3. 3. The denitrification strengthening device based on the AOA technology coupling MABR membrane, which is disclosed in claim 1, is characterized in that the inlet water of the MABR membrane tank (6) comprises mixed liquid in the aerobic tank (5) and sewage conveyed by a water distribution pipeline II (3), and the sewage conveyed by the water distribution pipeline II (3) accounts for 10% -30%.
4. 4. The denitrification strengthening device based on the AOA technology coupling MABR membrane, which is disclosed in claim 1, is characterized in that the sludge reflux pipe (8) is used for refluxing the sludge in the sedimentation tank (7) to the front end of the anaerobic tank (4), and the reflux amount is 20-100%.
5. 5. The denitrification strengthening apparatus based on AOA process coupled MABR membrane as claimed in claim 1, wherein the MABR membrane module (11) is a dense non-porous MABR membrane module.

Description

Denitrification strengthening device based on AOA technology coupling MABR membrane Technical Field The utility model belongs to the technical field of sewage treatment, and particularly relates to a denitrification strengthening device based on an AOA technology coupling MABR membrane. Background With the rapid promotion of town and the increasingly strict environmental protection requirements, municipal wastewater treatment plants in China currently face the contradiction between the improvement of effluent nitrogen and phosphorus emission standards (such as first-class A standard and quasi-IV water quality) and insufficient treatment efficiency, and the contradiction is particularly prominent in northern areas. The current mainstream technology such as AAO (anaerobic-anoxic-aerobic), AO (anoxic-aerobic), oxidation ditch and the like exposes the problem of vicious circle in the aspect of denitrification in the long-term operation, namely carbon source competition, functional flora inhibition, low reaction efficiency and rising operation cost, and is difficult to meet the stable standard reaching requirement of the first-level A standard of pollutant emission standards of urban sewage treatment plants (GB 18918-2002), and is more unable to adapt to the increasingly strict quasi-IV water emission requirement. In recent years, the industry tries to optimize the denitrification path by means of improved AAO (such as inverted AAO and AOA), multistage AO serial connection and the like, but the fundamental contradiction between carbon source distribution and dissolved oxygen control cannot be broken through although a certain effect is achieved. In the sewage treatment process, two types of MABR (membrane aeration biological membrane reactor) are commonly used in the market at present, one type is a microporous membrane, the market price of the membrane is low, but the problem of fouling is solved, the market price of the membrane is high, but the problem of fouling is basically solved, and although the MABR technology has synchronous nitrification and denitrification potential, no matter which type of MABR membrane is used for directly replacing the traditional technology, the industrialization barriers such as easy blocking of the microporous membrane biological membrane, high large-scale use investment cost and the like still exist. Disclosure of utility model The utility model aims to solve the problems, and provides a denitrification strengthening device based on an AOA technology coupling MABR membrane, which combines the traditional AOA technology and an MABR membrane tank, and adopts a compact non-porous membrane component to solve the problems of easy pollution and blockage of the membrane technology and high cost in mass use. The utility model provides a denitrification strengthening device based on an AOA technology coupling MABR membrane, which comprises a water distribution system, a biological reaction system and a sedimentation tank, wherein 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 biological reaction system comprises an anaerobic tank, an aerobic tank and an MABR membrane tank which are sequentially communicated, wherein an MABR membrane component is arranged in the MABR membrane tank; The MABR membrane pond is communicated with the sedimentation tank, the sedimentation tank is provided with a sludge return pipe 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. Further, the water distribution pipeline I is connected to the anaerobic tank, and the water distribution pipeline II is connected to the MABR membrane tank. Further, the inflow water of the MABR membrane tank comprises mixed liquid in the aerobic tank and sewage conveyed by a water distribution pipeline II, and the sewage conveyed by the water distribution pipeline II accounts for 10% -30%. And the sludge reflux pipe is used for refluxing the sludge in the sedimentation tank to the front end of the anaerobic tank, wherein the reflux amount is 20-100%. Further, the MABR membrane module is a compact non-porous MABR membrane module, oxygen is diffused to the outer layer through foamless transmission in the sewage treatment process, and a large amount of biological membranes attached to the surface of the MABR membrane module form an aerobic-anoxic-anaerobic layered structure from inside to enable nitrifying bacteria and denitrifying bacteria to be nitrified and denitrified in a partitioning mode. Compared with the prior art, the utility model has the beneficial effects that: The utility model uses AOA technology to couple MABR membrane, reduces the occupied area and the usage amount of the MABR membrane, and strengthens the denitrification effect of sewage treatment by superpo