Technology and method for treating urban sewage by sectional parallel anaerobic ammonia oxidation

Abstract

The invention provides a technology and a method for treating urban sewage by sectional parallel anaerobic ammonia oxidation, and belongs to the technical field of biological treatment of sewage. A raw water tank, an organic substance removal sequencing batch reactor (SBR), a short-cut nitrification SBR, a regulating water tank and an autotrophic nitrogen removal UASB reactor are adopted in the technology; the raw water tank is respectively connected with the organic substance removal SBR and the short-cut nitrification SBR through two peristaltic pumps; and the effluents of the organic substance removal SBR and the short-cut nitrification SBR are discharged to the regulating water tank, and the sewage in the regulating water tank enters the autotrophic nitrogen removal up-flow anaerobic sludge bed / blanket (UASB) reactor to realize removal of nitrogen. After a nitrification system drains water, the domestic sewage is added for post denitrification, so that implementation of short-cut nitrification and stability maintenance are facilitated; the concentration ratios of NH4<+>-N and NO2<->-N in the regulating water tank can be flexibly controlled by parallely connecting the organic substance removal SBR and the short-cut nitrification SBR; and the anaerobic ammonia oxidation technology is successfully applied to deep denitrification treatment of the domestic sewage, so that sewage treatment with high efficiency and low energy consumption is realized.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a process and method for treating urban sewage by segmented parallel anaerobic ammonium oxidation. Background technique [0002] The increasing water eutrophication has made the control and treatment of nitrogen pollution one of the key and difficult points in the research of water treatment technology. It is difficult for the traditional denitrification process to ensure the removal rate of total nitrogen in urban sewage with low carbon-to-nitrogen ratio without adding additional carbon sources. Therefore, how to improve the removal rate of total nitrogen while reducing the cost has become an The main problem faced. [0003] With the discovery of new biological denitrification pathways, anammox technology has been gradually developed and applied as one of the high-efficiency and low-cost biological denitrification processes. Anaerobic ammonium oxidation tec...

AI Technical Summary

Problems solved by technology

At present, the research on autotrophic denitrification process of anammox wastewater has been successfully applied to the treatment of high ammonia nitrogen wastewater, but there are relatively few studies on the autotrophic denitrification process of low ammonia nitrogen wastewater

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