Biological filtration tank and sewage treatment method

Abstract

The invention provides a biological filtration tank and a sewage treatment method. The biological filtration tank comprises a biological filtration tank body, a support layer, an aeration main pipe, an aeration branch pipe and a water supply distribution pipe, wherein the support layer is arranged at a lower half part of the biological filtration tank body and is used for dividing the biological filtration tank body into a lower water storage area and an upper filtration material area; the water storage area is communicated with the filtration material area; the filtration material area is filled with a filtration material; microorganisms are attached on the surface of the filtration material; the aeration main pipe is arranged in the water storage area; an air inlet of the aeration main pipe is communicated with an aerator; the aeration branch pipe is connected onto the aeration main pipe and is communicated with the aeration main pipe; the aeration branch pipe penetrates through the filtration material area; the top end of the aeration branch pipe is sealed; air outlet holes are formed in the pipe wall; the water supply distribution pipe is arranged at the upper part of the biological filtration tank body. Compared with the prior art, the aeration pipeline can effectively control the dissolved oxygen concentration of the whole biological filtration tank; the biological filtration tank is combined with the filtration material; the stable short-cut nitrification and denitrification are implemented; the sewage treatment energy consumption is reduced; the denitrification effect of the sewage is improved.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment, and particularly relates to a biological filter and a sewage treatment method. Background technique [0002] my country's rural domestic sewage is the source of black and odorous river bodies, so it is necessary to strengthen the treatment of my country's rural sewage. Due to the relatively weak economy and technology in rural areas, this requires simple and efficient sewage treatment technology, which does not require a large amount of investment and operating costs, nor a high level of operation and management. [0003] The main pollutants in rural domestic sewage are organic matter and ammonia nitrogen. The removal of organic matter is generally easier, but the removal of ammonia nitrogen requires a complex biological process, including nitrification and denitrification, which consumes a lot of energy and the effect is not satisfactory. In recent years, an efficient nitrogen removal theory...

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Problems solved by technology

However, many problems occurred during the operation, such as easy blockage, release of foul smell, low processing efficiency, etc.

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