Biological treatment device for wastewater with high sulfate and high ammonia nitrogen content

Abstract

The invention discloses a biological treatment device for wastewater with high sulfate and high ammonia nitrogen content. The biological treatment device comprises an anaerobic decarburization unit configured to receive wastewater with high sulfate and high ammonia nitrogen content and oxidize organic carbon in the wastewater through a biological anaerobic sulfuric acid reduction process, and a synchronous nitrification and denitrification-membrane bioreactor unit communicated with the anaerobic decarburization unit and configured to receive the effluent of the anaerobic decarburization unit, perform synchronous nitrification and denitrification on the effluent to perform denitrification treatment, and perform sludge-water separation on the sewage subjected to denitrification treatment to remove sludge. According to the invention, the biological treatment device fully utilizes the characteristics of water quality, can greatly reduce the sludge yield and even realize zero discharge of sludge, relieves the burden of a sludge treatment unit at the rear end of an activated sludge process at the present stage, saves the occupied area of the process, reduces the aeration rate, alleviates or even eradicates the problem of anaerobic membrane pollution, and realizes efficient and energy-saving carbon and nitrogen removal.

Description

technical field [0001] The present application relates to the field of sewage treatment, in particular to a biological treatment device for wastewater with high sulfate content and high ammonia nitrogen content. Background technique [0002] The traditional sludge activation method utilizes sludge proliferation to achieve the degradation of organic matter. This process will produce a large amount of residual sludge containing toxic and harmful substances and high water content, which will not only increase the burden of sludge treatment and disposal, but also cause direct or indirect pollution to the environment. . At present, in the sludge reduction technology, the process mode of adding chemicals or adding side flow has increased the investment cost, and the sludge reduction technology needs to be further developed. At the same time, blast aeration, microporous aeration, jet aeration and other methods are mostly used in the aerobic sewage treatment process at this stage. ...

AI Technical Summary

Problems solved by technology

[0002] The traditional sludge activation method utilizes sludge proliferation to achieve the degradation of organic matter. This process will produce a large amount of residual sludge containing toxic and harmful substances and high water content, which will not only increase the burden of sludge treatment and disposal, but also cause direct or indirect pollution to the environment.

At present, in the sludge reduction technology, the process mode of adding chemicals or adding side flow has increased the investment cost, and the sludge reduction technology needs to be further developed

At the same time, blast aeration, microporous aeration, jet aeration and other methods are mostly used in the aerobic sewage treatment process at the present stage. The aeration volume is large, the oxygen utilization rate is low, and the energy consumption is high, which needs to be optimized.

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