摘要
氧化亚氮(N2O)作为第三大温室气体,其温室效应不容小视。而生物脱氮系统是N2O排放的一大来源。文章对实验室、实际污水处理厂的生物脱氮系统N2O排放数据作简要介绍,并分析了N2O的排放机理和若干影响工艺参数,这些参数主要包括:(1)硝化阶段的低溶氧;(2)硝化、反硝化阶段亚硝酸盐的积累;(3)反硝化阶段的低COD/N比例。基于分析,最后进而提出相应的N2O减排策略。
N2O is the third greatest greenhouse gas and have immense impact on greenhouse effect.The system of Biological Nitrogen Removal（BNR） is a main source of N2O emission.In the study,we briefly introduce the N2O discharging situation of BNR in lab experiment and WWTPs.Subsequently,the emission mechanism and relevant impacting parameters are discussed.Those parameters were,（1）low oxygen concentration during nitrification.（2）Accumulation of nitrite during nitrification and denitrification.（3）low COD/N ratio during denitrification.Based on the analysis above,strategies to N2O emission reduction are proposed at last.
出处
《广东化工》
CAS
2011年第12期82-84,共3页
Guangdong Chemical Industry
关键词
氧化亚氮
生物脱氮
排放
减排
N2O
Biological nitrogen removal
emission
emission reduction
