污水生物脱氮过程中N_2O的释放途径和影响因素  

Ways and Effect Factors of N_2O Emission in Biological Nitrogen Removal Process from Wastewater

作　　者：庞毓旻 刘国华[1] 齐鲁[1] 范海涛[1] 王洪臣[1] 

机构地区：[1]中国人民大学环境学院,北京100872

出　　处：《环境保护科学》2014年第2期8-13,共6页Environmental Protection Science

基　　金：国家科技重大专项-水体污染控制与治理项目<污水处理曝气系统低碳运行关键设备开发与产业化>(2011ZX07316 001);国家高技术研究发展计划(863计划)项目<污水处理全过程监控的智能传感器系统研制>(2012AA062308)基金资助

摘　　要：为了更好地理解和掌握污水处理过程中N 2O的释放规律,结合近年来已经发表的研究结果,就传统的污水生物脱氮过程(全程硝化反硝化过程)和新型污水生物脱氮过程(同步硝化反硝化、短程硝化反硝化和厌氧氨氧化)中N2O的释放途径以及影响因素进行了综述。通过综述发现,硝化和反硝化过程均有可能导致N2O的释放,且硝化过程更易产生N2O;与传统的脱氮过程相比,同步硝化反硝化等新型脱氮过程产生N2O的概率更大;影响N2O释放的因素主要有DO浓度、NO-2浓度、进水氨氮负荷、SRT和COD/N等运行工况和细菌种类及其活性。最后,展望了该领域的研究方向。In order to understand N2O emission during wastewater treatment process,the mechanisms and effect factors of N2O emission from wasteweter by conventional biological nitrogen removal process （sequential nitrification and denitrification,SQND） and novel processes（simultaneous nitrification and denitrification,shortcut nitrification and denitrification,and anaerobic ammonium oxidation） were reviewed.The results indicated that N2O produced in both nitrification and denitrification processes,and nitrification process produced it easier.Campared with conventional processes,the probability of N2O production in novel processes,such as simultaneous nitrification and denitrification,was higher.The factors affecting N2O emission mainly included the operating parameters,such as DO,NO2-concentration,NH4＋-N concentration,SRT,COD/N,microorganisms and their activities in the system.Finally,the research trends of N2O emission and control were prospected.

关 键 词：N2O 释放途径 影响因素 生物脱氮 污水处理 

分 类 号：X703.1[环境科学与工程—环境工程]