反硝化除磷脱氮机理及其工艺研究进展

Research Progress on Mechanism and Technology of Denitrification Phosphorus and Nitrogen Removal

由于我国城市污水普遍存在碳源不足、C/N较低等问题,传统的生物脱氮除磷处理技术往往难以达到排放要求,且传统生物脱氮除磷工艺存在碳源竞争、泥龄差异等弊端,使脱氮除磷效率难以进一步提高。反硝化除磷脱氮技术以其能耗低、效率高等优点是目前研究热点之一。基于反硝化除磷脱氮理论,总结了反硝化除磷机理、微生物种类及特性,全面介绍了近年来反硝化除磷脱氮工艺及其耦合工艺的研究进展,分析对比了不同影响因素对各工艺反硝化除磷性能的影响,最后对未来的发展趋势和研究方向进行了展望,以期为反硝化除磷技术的研究及其工艺改进提供参考。

Due to the general lack of carbon sources and low C/N in municipal sewage in our country,the traditional biological denitrification and phosphorus removal treatment technology often hard to achieve the discharge requirements.The traditional biological denitrification and phosphorus removal process has drawbacks of competition for carbon sources and differences in the sludge retention time,which makes it hard to enhance the efficiency of denitrification and phosphorus removal.Denitrifying phosphorus and nitrogen removal technology is one of the hot spots in the current research with its advantages of low energy consumption and high efficiency.Based on the study of denitrifying phosphorus and nitrogen removal theory,the mechanism of denitrifying phosphorus removal,microbial species and features were summarized.The research progress of the denitrifying phosphorus and nitrogen removal process and its coupling process in recent years was generally introduced.The impact of different influencing factors on the performance of denitrifying and phosphorus removal of the various processes was analyzed and compared.Finally,the future development trend and research direction looked forward and provided a reference for the study of denitrifying phosphorus removal technology and improvement.