Nitrogen removal method for urban sewage denitrification filtering pool based on short-cut denitrification and anaerobic ammonia oxidation

Abstract

The invention belongs to the field of sewage treatment, and provides a nitrogen removal method for a denitrification filtering pool based on short-cut denitrification and anaerobic ammonia oxidation.Urban sewage treatment achieves advanced nitrogen removal generally through a process which combines the traditional A2O technology and the denitrification filtering pool. The nitrogen removal methodfor the urban sewage denitrification filtering pool based on the short-cut denitrification and the anaerobic ammonia oxidation is characterized in that inoculation of anaerobic ammonia oxidation sludge and denitrification sludge is carried out during a starting stage of the denitrification filtering pool; during an operating stage, an ammonia nitrogen and nitrate nitrogen online monitoring deviceis mounted at a water inlet end of the denitrification filtering pool, and the aeration quantity of an A2O biochemical pool is adjusted so that a ratio of nitrate nitrogen to ammonia nitrogen in waterentering the denitrification filtering pool is 0.9 to 1.1; and a carbon source is added into the denitrification filtering pool according to a C/N ratio of 2.5 to 3.0, the short-cut denitrification occurs in the filtering pool to produce nitrite nitrogen, and anaerobic ammonia oxidation reaction further occurs, so that the advanced nitrogen removal of a system is finally achieved, and the dosageof the carbon source in the denitrification filtering pool and the aeration quantity of the traditional nitrification system are reduced.

Description

technical field [0001] The invention relates to a denitrification method for urban sewage denitrification filters based on short-range denitrification + anaerobic ammonium oxidation, and belongs to the technical field of sewage biological treatment. Background technique [0002] With the gradual increase of sewage discharge standards, it is imperative to improve the standard of urban sewage treatment plants, and the bottleneck lies in improving the total nitrogen removal effect. In order to protect the environment, domestic sewage plants have gradually begun to upgrade and renovate, so that the effluent water quality standard can reach the first-class A standard of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB 18918-2002). The removal of total nitrogen is particularly important in the upgrading and transformation of sewage plants, which is the most difficult and has the largest proportion of investment. [0003] On the basis of process transforma...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high energy consumption of the existing urban sewage traditional A2O biochemical pool + denitrification filter treatment process, large amount of carbon source dosage and difficulty in deep denitrification, and propose a method based on short-range denitrification + anaerobic ammonia Nitrogen removal method for oxidized urban sewage denitrification filter

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