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Heterotrophic nitrification and aerobic denitrification by a novel Halomonas campisalis |
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| Authors: | Yan Guo Xuemei Zhou Yuguang Li Ke Li Caixia Wang Jianfei Liu Daojiang Yan Yilan Liu Dehui Yang Jianmin Xing |
| Institution: | 1. National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Zhongguancun Bei-er-tiao 1, Haidian District, P.O. Box 353, Beijing, 100190, People’s Republic of China 2. University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China 3. 101 Institute of the Ministry of Civil Affairs, Beijing, 100070, People’s Republic of China |
| Abstract: | A novel halophilic strain that could carry out heterotrophic nitrification and aerobic denitrification was isolated and named as Halomonas campisalis ha3. It removed inorganic nitrogen compounds (e.g. NO3 ?, NO2 ? and NH4 +) simultaneously, and grew well in the medium containing up to 20 % (w/v) NaCl. PCR revealed four genes in the genome of ha3 related to aerobic denitrification: napA, nirS, norB and nosZ. The optimal conditions for aerobic denitrification were pH 9.0, at 37 °C, with 4 % (w/v) NaCl and sodium succinate as carbon source. The nitrogen removal rate was 87.5 mg NO3 ?–N l?1 h?1. Therefore, this strain is a potential aerobic denitrifier for the treatment of saline wastewater. |
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