System integrating sewage treatment with sludge concentration

Abstract

The invention relates to a system integrating sewage treatment with sludge concentration. The system comprises a biological treatment tank and a membrane separation tank, wherein the biological treatment tank is connected with a water inlet pipe, a sludge backflow pipe and a mixed liquid backflow pipe; the membrane separation tank is connected with a water outlet pipe and a membrane separation sludge discharge pipe. The system is characterized in that an air flotation tank is additionally arranged between the biological treatment tank and the membrane separation tank to form an integrated tank sequentially partitioned by partition walls D and E; the air flotation tank is internally provided with an air flotation contact area close to the partition wall D; an air flotation separation area is arranged outside the air flotation area; the upper part of the air flotation tank is provided with a slag scraper and a slag discharging groove; a slag groove sludge pipe of the slag discharging groove is connected with a slag groove sludge discharging pipe and the biological treatment tank; the biological treatment tank is communicated with the air flotation tank through pore passages of the partition wall D; and the air flotation tank is communicated with the membrane separation tank through pore passages of the partition wall E; and the air flotation contact area and the air flotation separation area are respectively provided with an air flotation sludge pipe. The system integrating sewage treatment with sludge concentration has the advantages of concentrating and separating floating sludge in advance, lowering membrane pollution, improving membrane flux, reducing operation cost and protecting environment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an integrated sewage treatment and sludge concentration system based on an MBR sewage treatment system. Background technique [0002] Membrane Bioreactor (MBR for short) is a new type of sewage treatment technology that combines membrane separation technology and biological treatment technology. It is a new type of sewage treatment system that combines a membrane separation unit and a biological treatment unit. After more than 20 years of research, membrane bioreactors have achieved very effective applications in sewage treatment, but there are still the following problems: (1) The high membrane price will make the initial investment of the sewage treatment system too large; (2) ) Severe membrane fouling during operation will lead to high replacement frequency of membrane modules and excessive energy consumption, which will increase operating costs; (3) After sewage trea...

AI Technical Summary

Problems solved by technology

After more than 20 years of research, membrane bioreactors have achieved very effective applications in sewage treatment, but there are still the following problems: (1) The high membrane price will make the initial investment of the sewage treatment system too large; (2) ) Severe membrane fouling during operation will lead to high replacement frequency of membrane modules and excessive energy consumption, which will increase operating costs; (3) After sewage treatment, the remaining sludge needs to be transferred to another site for concentration treatment, The structure of the facilities is complex, which increases the cost of land occupation. At the same time, in the process of transportation and treatment, it causes muddy water and odor emissions, polluting the environment

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