Denitrification anaerobic ammonium oxidation SBR method for treating high-concentration nitrate wastewater and urban sewage

Abstract

The invention provides a method for treating high-concentration nitrate waste water and municipal sewage through denitrification anaerobic ammonium oxidation SBR, belonging to the field of sewage biotreatment. The method comprises the following steps: firstly, culturing and acclimating denitrifying bacteria population and anaerobic ammonium oxidation bacteria population which have inadequate denitrification characteristic, then inoculating anaerobic ammonium oxidation sludge and denitrifying sludge with high nitrite accumulation rate in the same reactor, leading nitrate waste water and municipal sewage to flow in denitrification anaerobic ammonium oxidation SBR reactor at a certain ratio, performing anaerobic ammonium oxidation to nitrite accumulated during reduction of nitrite and ammonium nitrogen in the municipal sewage to generate nitrogen gas and synchronously removing. According to the method, nitrate generated during anaerobic ammonium oxidation can be reduced through denitrifying bacteria without the condition of adding a carbon source, the nitrogen removal efficiency of a system can be improved, and the effective route for realizing sewage nitrogen removal with high efficiency and low energy consumption can be provided.

Description

technical field [0001] The invention relates to a denitrification anammox SBR method for treating high-concentration nitrate wastewater and urban sewage, which belongs to the technical field of sewage biological treatment, and specifically cultivates and domesticates denitrifying bacteria groups with incomplete denitrification characteristics first and anammox bacteria group, and then inoculate anammox sludge and denitrification sludge with a higher nitrite accumulation rate in the same reactor, and the nitrate wastewater and urban sewage enter the denitrification anaerobic in a certain proportion. In the oxyammox SBR reactor, the nitrite accumulated in the nitrate reduction process and the ammonia nitrogen in the urban sewage are then synchronously removed through the anaerobic ammonium oxidation reaction to generate nitrogen. Background technique [0002] With the acceleration of my country's industrialization process, the natural environment, especially the water environm...

AI Technical Summary

Problems solved by technology

Using the traditional nitrification and denitrification method to denitrify urban sewage not only wastes a lot of organic carbon sources in raw water, but also the denitrification effect is not ideal, and additional carbon sources are still needed to improve the denitrification effect, thus increasing the operating costs

However, the accumulation of nitrite in the short-cut nitrification process of urban sewage is difficult to achieve and maintain stability, which is the bottleneck for the realization of anaerobic ammonium oxidation of urban sewage

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