硫/铁硫化物自养反硝化脱氮除磷研究进展  

Research progress on autotrophic denitrification and phosphorus removal of sulfur/iron sulphide

作　　者：魏秋 王春荣[1] 宋俊学 刘苗苗 张浙 胡馨 WEI Qiu;WANG Chunrong;SONG Junxue;LIU Miaomiao;ZHANG Zhe;HU Xin(School of Chemical and Enironmental Engineering,China Univrsity of Mining and Technology(Bejing),Beijing 100083,China;State Key Laboratory of Enwironmental Water Quality,Center for Eco Enwironmental Studies,Chinese Academy of Sciences,Bejing 100086,China;School of Geography and Enwironment,Shandong Normal University,Ji'nan 250358,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100086 [3]山东师范大学地理与环境学院,山东济南250358

出　　处：《工业水处理》2022年第12期10-16,25,共8页Industrial Water Treatment

基　　金：国家水体污染控制与治理科技重大专项(2018ZX07110002)。

摘　　要：二级出水中的氮、磷浓度虽较低,但污水排放量大,是造成水体富营养化的原因之一;且二级出水的碳氮比低,采用传统反硝化工艺无法达到脱氮除磷的需求。利用硫/铁硫化物自养反硝化深度处理污水是有必要的。阐述了自养反硝化菌利用硫/铁硫化物进行反硝化脱氮除磷的基本原理,以及反硝化菌用铁硫化物作电子供体的反应途径,论述了水力停留时间(HRT)、温度、pH对硫/铁硫化物自养反硝化过程的影响。研究表明:增加HRT可以提高硫/铁硫化物自养反硝化对氮、磷的去除率;反硝化菌群属于嗜温性菌,温度低于20℃明显抑制反硝化速率;pH为6.5-7.0时硫/铁硫化物自养反硝化菌群的活性最高,对氮、磷的去除效果最好;硫氮比、COD等也会影响硫/铁硫化物自养反硝化对氮、磷的去除效率。介绍了前人研究硫/铁硫化物自养反硝化过程中主要的微生物种类和相对丰度,总结了国内外关于硫/铁硫化物自养反硝化脱氮除磷的工程实际应用,并指出工艺中存在的问题及解决方向。It is necessary to use sulfur/iron sulfide autotrophic denitrification for advanced treatment of wastewater due to low concentration of N and P in secondary effluent,the large amount of sewage discharge causes eutrophication of the water body,and the low carbon-nitrogen ratio of the secondary effluent which can’t be treated by traditional denitrification.The basic principles of denitrification and phosphorus removal by autotrophic denitrifying bacteria using sulfur and iron sulfides,and the reaction pathway of denitrifying bacteria using sulfur and iron as electron donors were described.The effects of hydraulic retention time(HRT),temperature and pH on the process of autotrophic denitrification of sulfur/iron sulfides were discussed.The study showed that increasing HRT could improve the removal rate of nitrogen and phosphorus by sulfur/iron sulfide autotrophic denitrification.Denitrifying bacteria were thermophilic bacteria,and the temperature below 20℃ significantly inhibited the denitrification rate.The activity of sulfur/iron sulfide autotrophic denitrification bacteria was the highest at pH 6.5-7.0,and the removal efficiency of nitrogen and phosphorus was the best.The sulfur to nitrogen ratio,COD also affect the removal efficiency of sulfur/iron sulfide autotrophic denitrification on nitrogen and phosphorus.The main microbial species and relative abundance in the process of autotrophic denitrification of sulfur/iron sulfide were introduced.The engineering application on denitrification of sulfur/iron sulfide autotrophic denitrification for nitrogen and phosphorus removal at home and abroad was summarized,and the problems and solution directions in the process were pointed out.

关 键 词：自养反硝化 硫 铁硫化物 脱氮 除磷 

分 类 号：X506[环境科学与工程—环境工程]