Effects of COD/N ratio and DO concentration on simultaneous nitrification and denitrification in an airlift internal circulation membrane bioreactor  

作　　者：Meng Qingjuan Yang Fenglin Liu Lifen Meng Fangang 

机构地区：[1]Dalian Univ Technol, Sch Environm & Biol Sci & Technol, MOE, Key Lab Ind Ecol & Environm & Engn, Dalian 116024, Peoples R China [2]Tech Univ Berlin, Dept Chem Engn, D-10623 Berlin, Germany

出　　处：《Journal of Environmental Sciences》2008年第8期933-939,共7页环境科学学报（英文版）

摘　　要：The effects of chemical oxygen demand and nitrogen(COD/N)ratio and dissolved oxygen concentration(DO)on simultaneous nitrification and denitrification(SND)were investigated using an airlift internal circulation membrane bioreactor(AIC-MBR)with synthetic wastewater.The results showed that the COD efficiencies were consistently greater than 90% regardless of changes in the COD/N ratio.At the COD/N ratio of 4.77 and 10.04,the system nitrogen removal efficiency became higher than 70%.However,the nitrogen remova...The effects of chemical oxygen demand and nitrogen(COD/N)ratio and dissolved oxygen concentration(DO)on simultaneous nitrification and denitrification(SND)were investigated using an airlift internal circulation membrane bioreactor(AIC-MBR)with synthetic wastewater.The results showed that the COD efficiencies were consistently greater than 90% regardless of changes in the COD/N ratio.At the COD/N ratio of 4.77 and 10.04,the system nitrogen removal efficiency became higher than 70%.However,the nitrogen remova...

关 键 词：simultaneous nitrification and denitrification（SND） chemical oxygen demand and nitrogen（COD/N）ratio dissolved oxygen（DO）concentration 

分 类 号：X703[环境科学与工程—环境工程]