AAO-MBR process and apparatus for synchronously removing nitrogen and phosphorus

Abstract

The invention provides an AAO-MBR process for synchronously removing nitrogen and phosphorus. The AAO-MBR process for synchronously removing nitrogen and phosphorus comprises the following steps of S1, introducing sewage into an anaerobic tank and an aerobiotic tank respectively, carrying out denitrification and phosphorus release in the anaerobic tank by virtue of organic substances carried by the sewage, introducing water of the anaerobic tank into the aerobiotic tank, and carrying out absorption of the organic substances and phosphorus in the aerobiotic tank; S2, introducing water of the aerobiotic tank into a sedimentation tank and carrying out mud-water separation in the sedimentation tank; and S3, introducing a supernatant obtained by the mud-water separation in the sedimentation tank into an MBR reaction tank, completing a nitration reaction and strengthen removal of the organic substances in the MBR reaction tank, and returning the mud in the sedimentation tank to the anaerobic tank to maintain the mud concentration in the anaerobic tank. The invention also provides an AAO-MBR apparatus for synchronously removing nitrogen and phosphorus. The AAO-MBR process and apparatus have the advantages of stability, high efficiency, short route and low energy consumption.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a synchronous nitrogen and phosphorus removal AAO-MBR process and a device thereof in the sewage treatment process. Background technique [0002] With the rapid development of economy and society, the problem of lack of water resources in our country is becoming more and more obvious. However, in terms of the advanced sewage treatment process, affected by the bottleneck of the traditional activated sludge process, the water quality of the advanced treatment, especially the nitrogen and phosphorus pollutants, is unstable and the health and safety risks of the reclaimed water exist. It is urgent to develop a new type of high efficiency and low consumption. handicraft Research. In addition, most of the existing sewage treatment plants are faced with the pressure of improving treatment capacity and upgrading. Under the condition of insufficient land resource reserves, there is an urgent...

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Problems solved by technology

However, the decrease of membrane flux and membrane cleaning due to membrane fouling will increase the operating cost of the membrane separation process and limit its engineering application.

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