生物脱氮中N_2O产生过程的微生物作用  

MICROBIAL ACTION IN N2O PRODUCTION FROM BIOLOGICAL NITROGEN REMOVAL

作　　者：王赛[1] 王淑莹[1] 彭永臻[1] 巩有奎[1] 

机构地区：[1]北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100124

出　　处：《水处理技术》2011年第5期1-5,11,共6页Technology of Water Treatment

基　　金："十一五"国家科技支撑计划重点项目(2006BAC19B03);北京市教委科技创新平台项目(PXM2008_014204_050843)

摘　　要：N2O是一种重要的温室气体。微生物的生物硝化反硝化过程是N2O产生的主要来源。从微生物学的角度阐述了脱氮过程中N2O的产生过程,并分析了不同脱氮过程中各菌种对N2O产生过程的作用。硝化过程中N2O主要产生于氨氧化细菌的氨氧化过程,亚硝酸盐氧化细菌的存在可以减少N2O的产量;反硝化过程中亚硝酸盐的积累,低氧和碳源不足都会导致N2O产生量的增加;另外,其他一些参与氮循环的微生物也会产生N2O。文章最后给出了污水脱氮过程中N2O减量化的策略以及今后研究的方向。Nitrous oxide（N2O） is an important greenhouse gas.Microbiological nitrification and denitrification were considered to be the major sources of N2O.The microbial processes of N2O production in biological nitrogen removal are elaborated from the microbiological perspective.In addition,the N2O production by microorganisms in different nitrogen removal processes is summarized.In nitrification process,the N2O production is mainly caused by ammonia-oxidizing bacteria（AOB）.The existence of nitrite-oxidizing bacteria（NOB） could reduce the production of N2O.The accumulation of nitrite,low DO concentration and carbon lacking can lead to large amount of N2O production in denitrification process.Moreover,some other bacteria participate in nitrogen cycle can produce N2O also.This article proposes strategies and main directions for N2O reduction in nitrogen removal process.

关 键 词：N2O 生物脱氮 硝化过程 反硝化过程 微生物 

分 类 号：X703.1[环境科学与工程—环境工程]