Low-energy-consumption municipal sewage nitrogen removal method based on enhanced carbon capture and anaerobic ammonia oxidation

Abstract

The invention discloses a low-energy-consumption municipal sewage nitrogen removal method based on enhanced carbon capture and anaerobic ammonia oxidation. A raw water tank is a closed tank and is provided with an overflow pipe and a blow-down pipe; a bio-stabilization reactor and a biological adsorption reactor are respectively in a high DO environment and a low DO environment; the municipal sewage carbon capture is enhanced by improving the ability of adsorbing organic matters through microbes; a biological nitrogen removal reactor is sequentially divided into a low DO aerobic zone, an anoxic zone, an aerobic zone and a settling zone; a shortcut nitrification-anaerobic ammonia oxidation reaction is carried out in the low DO aerobic zone, and ammonia nitrogen is converted into nitrogen and partial nitrate nitrogen; organic matters in partial raw water serve as a carbon source, and advanced nitrogen removal is realized through the shortcut nitrification-anaerobic ammonia oxidation reaction. In order to avoid the ammonia nitrogen existing in the effluent, the aerobic zone is increased at the rear end of the anoxic zone, and the residual ammonia nitrogen in the sewage is oxidized into nitrate; and finally, the sewage is discharged through the settling zone. According to the method, the municipal sewage energy recovery efficiency can be improved, and the advanced nitrogen removal is realized.

Description

technical field [0001] The invention relates to a low-energy urban sewage denitrification device and method based on enhanced carbon capture and anaerobic ammonium oxidation, and belongs to the technical field of sewage biological treatment. Background technique [0002] With the continuous development of industrial enterprises and the continuous improvement of people's living standards, in addition to organic matter, the main pollutants in urban sewage, nitrogen and phosphorus content are also increasing, which intensifies the process of eutrophication of water bodies and causes water pollution. The river is black and smelly, and fish and shrimp die, which not only destroys the landscape, but also poses a threat to human health. In recent years, in order to control the eutrophication of water bodies, a large number of sewage treatment plants have been newly built, and existing sewage treatment plants have been continuously upgraded to remove nitrogenous pollutants in urban ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a low-energy urban sewage denitrification device and method based on enhanced carbon capture and anaerobic ammonium oxidation for the problems of high energy consumption, low energy recovery rate and difficulty in deep denitrification in the existing process

Images