Device and method for synchronous advanced treatment of secondary effluent water and urban sewage of sidestream of urban sewage treatment plant

Abstract

The invention discloses a device and method for synchronous advanced treatment of secondary effluent water and urban sewage of sidestream of an urban sewage treatment plant, and belongs to the field of sewage treatment. Urban sewage and secondary effluent water of the urban sewage treatment plant containing NO3 +-N enter a partial denitrification reactor at the same time, NO3+-N is converted into NO2+-N by means of organic matter in urban sewage, effluent water containing NH4+-N and NO2+-N and a small amount of urban sewage enter an anaerobic ammonia oxidation reactor synchronously for denitrification, a small amount of organic matter in urban sewage is used for performing in-situ removal on NO3 +-N generated in the anaerobic ammonia oxidation process, and therefore the purpose of synchronous advanced treatment of secondary effluent water and urban sewage of the urban sewage treatment plant is achieved. The problems that the denitrification efficiency is low and effluent water contains excessive NO3+-N during technological treatment of urban sewage are solved, the urban sewage denitrification cost and energy consumption are lowered, and the method has the advantages that the nitrogen element removal rate is high, the treated water amount is large and the operation cost is low; in addition, the technology is small in floor area, upgrading and reconstruction are easy, and risk is low.

Description

technical field [0001] The invention relates to a process technology for synchronously advanced treatment of secondary effluent and urban sewage in a side stream of an urban sewage treatment plant, and belongs to the technical field of sewage biological treatment. Background technique [0002] At present, my country's sewage treatment plants mainly adopt the traditional nitrification and denitrification biological denitrification process. However, because biological denitrification requires organic matter to provide electron donors, most sewage treatment plants generally face a problem of insufficient organic carbon sources in raw water, C / N The ratio is low, resulting in poor denitrification effect, and the effluent often contains a large amount of nitrate nitrogen. In order to solve the above difficulties, sewage treatment plants often introduce the secondary effluent into the denitrification filter unit, and by adding carbon sources (such as methanol, etc.), to strengthen ...

AI Technical Summary

Problems solved by technology

However, this technology is still difficult to be widely used, and the main bottleneck is the stable acquisition of nitrite nitrogen, the reaction substrate of anammox.

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