Device and method for treating high-concentration nitrate wastewater and urban sewage by partial denitrification and anaerobic ammonia oxidation

Abstract

The invention provides a device and a method for treating high-concentration nitrate wastewater and urban sewage by partial denitrification and anaerobic ammonia oxidation, and belongs to the field of sewage bio-treatment. Nitrate wastewater and urban sewage enter a partial denitrification reactor, nitrate is reduced into nitrite through heterotrophic denitrification strains by using biodegradable organic carbon sources in the urban sewage, effluent enters an anaerobic ammonia oxidation reactor, and ammonia nitrogen and nitrite in the urban sewage are subjected to anaerobic ammonia oxidation reaction to generate nitrogen. By adopting the device and the method, synchronous nitrogen removal of the high-concentration nitrate wastewater and the urban sewage is realized, additional carbon sources are not needed, the operational management is convenient, the operating cost is reduced, the consumption of energy is reduced, and the denitrification efficiency is high.

Description

Technical field [0001] The invention relates to a partial denitrification-anaerobic ammonium oxidation device and method for treating high-concentration nitrate wastewater and urban sewage, belonging to the technical field of sewage biological treatment, and specifically it simultaneously enters the partial reaction of nitrate wastewater and urban sewage in proportion Nitrification reactor, one of the denitrifying bacteria with incomplete denitrification characteristics uses the biodegradable organic carbon source in municipal sewage to reduce nitrate to nitrite, ammonia nitrogen in municipal sewage and nitrous acid accumulated by denitrification The salt is then removed through anaerobic ammonia oxidation reaction to achieve simultaneous denitrification of high-concentration nitrate wastewater and urban sewage. Background technique [0002] With the rapid development of economic construction, the problem of water eutrophication caused by excessive nitrogen and phosphorus is beco...

AI Technical Summary

Problems solved by technology

Using the traditional nitrification and denitrification method to denitrify urban sewage wastes a lot of organic carbon sources in the raw water, and the denitrification effect is not ideal. It is still necessary to add carbon sources 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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