摘要：

随着污水排放标准的提升，采用常规倒置A²/O工艺处理废水时，COD、NH₄⁺-N、TN、TP的质量浓度无法全部达到排放标准要求。对该工艺存在的碳源竞争、进水碳源不足、SRT矛盾等不足进行优化改进，通过分段进水、投加外加碳源、MBR工艺联合运行的方式达到提高脱氮除磷性能的目的。同时，为及时处理各类水质突发状况，宜采取多模式运行理论。

关键词: 脱氮除磷, 外加碳源, 分段进水, MBR, 多模式运行

Abstract:

With the improvement of national sewage discharge standards, the mass concentrations of COD, NH₄⁺-N, TN and TP all could not meet the emission standards when using traditional inverted anoxic-anaerobic-oxic(A²/O) process to treat wastewater. The problems of carbon source competition, insufficient carbon source of influent and contradiction of SRT are optimized and improved. The purpose of improving the performance of nitrogen and phosphorus removal is achieved by adopting the method of step feed mode, external carbon source and running in conjunction with MBR. At the same time, in order to be able to respond the occurrence of various water quality emergencies in a timely manner, multi-mode operation theory should be adopted.

Key words: nitrogen and phosphorus removal, external carbon source, step feed mode, MBR, multi-mode operation

中图分类号: 

• X703