N_2O and NH_3 emissions from a bioreactor landfill operated under limited aerobic degradation conditions

查看全文 作　　者：Pinjing He Na Yang Huili Gu Hua Zhang Liming [1]Shao

机构地区：[1]State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

出　　处：《Journal of Environmental Sciences》索引2011年第23卷第6期,共9页

基　　金：supported by the National Key Technology R&D Program of China(No.2006BAJ04A06);the National High Technology Research and Development Program(863) of China(No.2003AA644020);the Program of Shanghai Subject Chief Scientist(No. 10XD1404200) 摘　　要：The combination of leachate recirculation and aeration to landfill may be an efficient way for in-situ nitrogen removal.However,nitrogenous substances contained in the landfill layer are concomitantly transformed into N2O and NH3,leading to increased emissions into the atmosphere.In the present study,the emissions of N2O and NH3 were measured under conditions of fresh or partially stabilized refuse with or without leachate recirculation or intermittent aeration.The results showed that the largest N2O emission(12.4 mg-N/L of the column) was observed in the aerated column loaded with partially stabilized refuse and recycled with the leachate of low C/N ratio;while less than 0.33 mg-N/L of the column was produced in the other columns.N2O production was positively correlated with the prolonged aerobic time and negatively related with the C/N ratio in the recycled leachate.NH3 volatilization increased with enhanced gas flow and concentration of free ammonia in the leachate,and the highest cumulative volatilization quantity was 1.7 mg-N/L of the column. 关键词：N2O排放量生物反应器填埋场 NH3 降解条件好氧渗滤液回灌垃圾填埋场运作

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N_2O and NH_3 emissions from a bioreactor landfill operated under limited aerobic degradation conditions

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