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.
出处
《水处理技术》
CAS
CSCD
北大核心
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)
关键词
N2O
生物脱氮
硝化过程
反硝化过程
微生物
nitrous oxide（N2O）
biological nitrogen removal
nitrification
denitrification
microorganism
