title: Evaluation of simultaneous nitrification and denitrification under controlled conditions by an aerobic denitrifier culture.
abstract: Paracoccus versutus LYM was characterized with the ability of simultaneous nitrification and denitrification (SND) in presence of NH4(+)-N and NO3(-)-N (140mg/L-N each). However, there was approximate 95.80mg/L NO2(-)-N left during SND process. Fe(2+) was added in the SND medium and it benefited bacterial growth and further converted NO2(-)-N a little. Besides, remaining NO2(-)-N could be completely reduced by adding carbon donors in presence of NH4(+)-N and NO3(-)-N, whose converting efficiencies also reached 97.09% and 96.34%, respectively. And N2 stayed as the main product of SND process. While NO2(-)-N and NH4(+)-N were present simultaneously, strain LYM could also remove nitrogen compounds thoroughly with sufficient carbon source. But there was no NO2(-)-N reduced as sole nitrogen source in the medium even if C/N ratio reached as high as 30.
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China. Electronic address: zhangyu@dlut.edu.cn.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Shi
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Mingxiang
authors.initials: M
authors.lastname: Chen
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Xiyang
authors.initials: X
authors.lastname: Dong
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Jiti
authors.initials: J
authors.lastname: Zhou
mesh_terms: D000641:Ammonia / Q000378:metabolism*; D002244:Carbon / Q000378:metabolism; D058440:Denitrification; D007501:Iron / Q000378:metabolism; D009566:Nitrates / Q000378:metabolism*; D058465:Nitrification; D009584:Nitrogen / Q000378:metabolism; D010230:Paracoccus / Q000378:metabolism*
chemical_list: D009566:Nitrates; D002244:Carbon; D000641:Ammonia; D007501:Iron; D009584:Nitrogen
keywords: C/N ratio; Fe(2+) solution; NO(2)(−)-N; Paracoccus versutus; Simultaneous nitrification and denitrification