Biological sewage treatment method and device

Abstract

The invention provides a biological sewage treatment method and device. The method is characterized in that a silk thread bundle is vertically arranged in a fluid passage; the filling rates of silk threads in the cross section of the fluid passage filled with the silk threads are 0.5-12%; the sectional areas of the silk threads forming the silk thread bundle are 0.0008-7mm<2>; a microbial film is cultured on a plurality of silk threads to form a biofilm bed, and then sewage flows through the gaps among the silk threads to undergo biotreatment. Compared with the prior art, the method and device provided by the invention have the advantage of ensuring a biofilm bed microbial carrier to have a stable specific surface area which is not easy to damage.

Description

Technical field: [0001] The invention relates to a sewage treatment method and device. Background technique: [0002] The existing biological sewage treatment is realized by injecting sewage into the biofilm bed, and removing the pollutants in the sewage through the microorganisms on the biofilm bed. The problem that needs to be solved in this technology is how to improve the microbial carrier of the biofilm bed as much as possible. specific surface area. In the prior art, the microbial carrier adopts porous materials, such as steel wool balls, to increase the specific surface area of ​​the biological carrier of the biofilm bed through the large specific surface area of ​​the holes. Since the size of the pores of porous materials is often fixed, the biofilm can easily block the pores, resulting in a significant increase in the resistance of sewage through. Even under the action of high sewage water pressure, it is not easy to get through the blocked holes. In this way, ...

AI Technical Summary

Problems solved by technology

Since the size of the pores of porous materials is often fixed, the biofilm can easily block the pores, resulting in a significant increase in the resistance of sewage through. Even under the action of high sewage water pressure, it is not easy to get through the blocked holes. In this way, the sewage can only pass through the gaps between the steel wire balls with relatively small resistance, which reduces the sewage treatment effect. After a period of time, the specific surface area of ​​the biofilm bed drops sharply due to the clogging of the holes, making the biofilm The sewage treatment capacity of the bed is greatly reduced

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