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论文类型：期刊论文

发表时间：2015-01-01

发表刊物：BIORESOURCE TECHNOLOGY

收录刊物：SCIE、EI、PubMed

卷号：175

页面范围：602-605

ISSN号：0960-8524

关键字：Simultaneous nitrification and denitrification; Paracoccus versutus; Fe2+ solution; C/N ratio; NO2--N

摘要：Paracoccus versutus LYM was characterized with the ability of simultaneous nitrification and denitrification (SND) in presence of NH4+-N and NO3--N (140 mg/L-N each). However, there was approximate 95.80 mg/L NO2--N left during SND process. Fe2+ 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 N-2 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. (C) 2014 Elsevier Ltd. All rights reserved.