Highly integrated improved A/A/O-MBR integrated sewage treatment device

Abstract

The invention relates to a highly integrated improved A / A / O-MBR integrated sewage treatment device. The device comprises a water inlet unit, an improved A / A / O system unit, an MBR membrane system unitand an equipment room, the water inlet unit comprises a water inlet channel, the improved A / A / O system unit comprises an anaerobic tank, a facultative tank, an anoxic tank and an aerobic tank, the water inlet channel, the anaerobic tank, the facultative tank, the anoxic tank and the aerobic tank sequentially communicate in a baffling manner by arranging clapboards in a tank body, the tank body isalso provided with a membrane tank provided with the MBR membrane system unit, the equipment room and a water outlet disinfection tank, and the MBR membrane system unit is connected with the aerobic tank. According to the highly integrated improved A / A / O-MBR integrated sewage treatment device, on the basis of the traditional A / A / O process, the characteristics of the MBR process are combined, the combined process is optimized and improved, and the highly integrated improved A / A / O-MBR integrated sewage treatment device is more efficient and energy-saving after optimized combination.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a highly integrated improved A / A / O-MBR integrated sewage treatment device. Background technique [0002] The A / A / O process is the anaerobic-anoxic-aerobic activated sludge process, which is the simplest and most widely used nitrogen and phosphorus removal process. This method was developed by some experts in the United States on the basis of the AO denitrification process in the 1970s. The sewage first enters the anaerobic tank, and the phosphorus-accumulating bacteria brought in by the returning sludge decompose the phosphorus-accumulating bacteria in the body. A part is used for active absorption of VFAs by phosphorus accumulating bacteria and storage of PHB in the body. Entering the anoxic zone, the denitrifying bacteria use the nitrate brought in by the reflux of the mixed solution and the organic matter in the influent to denitrify and denitrify, and th...

AI Technical Summary

Problems solved by technology

In order to maintain a reasonable sludge concentration distribution in each biochemical unit and the carbon-to-nitrogen ratio of raw sewage denitrification in the A / A / O process, it is necessary to return the sludge from the aerobic tank to the former anoxic tank, and the dissolved sludge carried in the returning sludge On the one hand, oxygen will consume the carbon source in the sewage, on the other hand, it will adversely affect the denitrification and phosphorus release reaction environment

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