N_2O emission from nitrogen removal via nitrite in oxic-anoxic granular sludge sequencing batch reactor  

作　　者：Hong Liang Jiaoling Yang Dawen Gao 

机构地区：[1]School of Forestry, Northeast Forestry University [2]State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology

出　　处：《Journal of Environmental Sciences》2014年第3期537-541,共5页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.21177033);the Research Fund for the Doctoral Program of Higher Education,Ministry of Education of China(No.20092302110059);the Program for Famous Teachers of Northeast Forestry University(No.PFT-1213-22)

摘　　要：Bionitrification is considered to be a potential source of nitrous oxide （N2O） emissions, which are produced as a by-product during the nitrogen removal process. To investigate the production of N2O during the process of nitrogen removal via nitrite, a granular sludge was studied using a labscale sequence batch reactor operated with real-time control. The total production of N2O generated during the nitrification and denitrification processes were 1.724 mg/L and 0.125 mg/L, respectively, demonstrating that N2O is produced during both processes, with the nitrification phase generating larger amount. In addition, due to the NEO-N mass/oxidized ammonia mass ratio, it can be concluded that nitrite accumulation has a positive influence on N2O emissions. Results obtained from PCRDGGE analysis demonstrate that a specific Nitrosomonas microorganism is related to N2O emission.Bionitrification is considered to be a potential source of nitrous oxide （N2O） emissions, which are produced as a by-product during the nitrogen removal process. To investigate the production of N2O during the process of nitrogen removal via nitrite, a granular sludge was studied using a labscale sequence batch reactor operated with real-time control. The total production of N2O generated during the nitrification and denitrification processes were 1.724 mg/L and 0.125 mg/L, respectively, demonstrating that N2O is produced during both processes, with the nitrification phase generating larger amount. In addition, due to the NEO-N mass/oxidized ammonia mass ratio, it can be concluded that nitrite accumulation has a positive influence on N2O emissions. Results obtained from PCRDGGE analysis demonstrate that a specific Nitrosomonas microorganism is related to N2O emission.

关 键 词：nitrous oxidenitrite accumulation nitrification and denitrification biological nitrogen removalwastewater treatment 

分 类 号：X703[环境科学与工程—环境工程] X511