Enhanced nitrogen-removing A/O flow-separating biochemical pond

Abstract

The invention discloses an enhanced nitrogen-removing A / O flow-separating biochemical pond. The biochemical pond comprises a water distribution region, an anoxic flow-separating biochemical region, an aerobic flow-separating biochemical region and a water collection region, wherein flow-separating balls are placed in the anoxic flow-separating biochemical region and the aerobic flow-separating biochemical region, so that microorganisms can grow in two ways of biological membrane and suspended sludge, and the microorganism concentration and the NH3-N volumetric loading of a reactor can be increased; a reflux pump is arranged in the water collection region, partial effluent from the A / O flow-separating biochemical pond is returned to the water distribution region, and NO3<->-N and a small amount of NO2<->-N are supplied to denitrification and short-cut denitrification in the anoxic flow-separating biochemical region, so that a free NH3<->-N biological inhibiting effect can be reduced; the A / O flow-separating biochemical pond can realize two-stage series connection, and an external carbon source is added into the water distribution region of the A / O flow-separating biological pond, so that the high-concentration ammonia-nitrogen wastewater nitrogen-removing efficiency can be further improved. The enhanced nitrogen-removing A / O flow-separating biochemical pond can be used for solving the problems of poor high-concentration ammonia-nitrogen wastewater quality adaptability and poor treatment effect caused by a biological nitrogen removing method, and reducing cost for treating high-concentration ammonia-nitrogen wastewater.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to an enhanced denitrification A / O floating biochemical pool. Background technique [0002] At present, the main denitrification methods include biological denitrification, air stripping, breakpoint chlorination and ion exchange. Among them, biological denitrification has the advantages of low treatment cost and simple operation and management, and has been widely used. The most typical technology in the biological denitrification method is the pre-denitrification activated sludge method, that is, the A / O denitrification activated sludge method. The mixed growth of heterotrophic bacteria, denitrifying bacteria and nitrifying bacteria in the activated sludge did not form a reasonable microbial population structure in the reactor space, and there were poor water quality adaptability and free NH 3 -N has obvious biological inhibitory effect, high C / N ratio requirement...

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Problems solved by technology

[0004] In order to solve the two problems of poor water quality adaptability and poor treatment effect of the biological denitrification method for treating high-concentration ammonia-nitrogen wastewater, the present invention develops an enhanced denitrification A / O floating biochemical pool, and improves the efficiency of biological denitrification technology for treating high-concentration ammonia-nitrogen wastewater. Adaptability and treatment effect, reduce the cost of high concentration ammonia nitrogen wastewater treatment

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