Nitrous oxide production during nitrogen removal from domestic wastewater in lab-scale sequencing batch reactor  

作　　者：LIU Xiuhong PENG Yi WU Changyong AKIO Takigawa PENG Yongzhen 

机构地区：[1]School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China [2]Department of Civil Engineering, Maebashi Institute of Technology, Maebashi, Japan [3]School of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China

出　　处：《Journal of Environmental Sciences》2008年第6期641-645,共5页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.50478040).

摘　　要：The production of N2O during nitrogen removal from real domestic wastewater was investigated in a lab-scale aerobic-anoxic sequencing batch reactor with a working volume of 14 L. The results showed that the total N2O-N production reached higher than 1.87 mg/L, and up to 4% of removed nitrogen was converted into N20. In addition, N20 led to a much higher greenhouse effect than CO2 during aerobic reaction phase, this proved that N2O production could not be neglected. The N2O-N production during nitrification was 1.85mg/L, whereas, during denitrification, no N2O was produced, nitrification was the main source of N2O production during nitrogen removal. Furthermore, during denitrification, the dissolved N2O at the end of aeration was found to be further reduced to N2. Denitrification thus had the potential of controlling N2O production.The production of N2O during nitrogen removal from real domestic wastewater was investigated in a lab-scale aerobic-anoxic sequencing batch reactor with a working volume of 14 L. The results showed that the total N2O-N production reached higher than 1.87 mg/L, and up to 4% of removed nitrogen was converted into N20. In addition, N20 led to a much higher greenhouse effect than CO2 during aerobic reaction phase, this proved that N2O production could not be neglected. The N2O-N production during nitrification was 1.85mg/L, whereas, during denitrification, no N2O was produced, nitrification was the main source of N2O production during nitrogen removal. Furthermore, during denitrification, the dissolved N2O at the end of aeration was found to be further reduced to N2. Denitrification thus had the potential of controlling N2O production.

关 键 词：N2O domestic wastewater NITRIFICATION DENITRIFICATION 

分 类 号：X703[环境科学与工程—环境工程]