Simultaneous heterotrophic nitrification and aerobic denitrification by bacterium Rhodococcus sp CPZ24

文献类型： 外文期刊

第一作者： Wang, Yingchun

作者： Wang, Yingchun;Ren, Tianzhi;Wang, Ligang;Chen, Peizhen;Li, Ji;Li, Qing X.;Li, Shaopeng

作者机构：

关键词： Heterotrophic nitrification;Aerobic denitrification;Rhodococuus sp.

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN： 0960-8524

年卷期： 2012 年 116 卷

页码：

收录情况： SCI

摘要： Rhodococcus sp. CPZ24 was isolated from swine wastewater and identified. Batch (0.25 L flask) experiments of nitrogen removal under aerobic growth conditions showed complete removal of 50 mg L-1 ammonium nitrogen within 20 h, while nitrate nitrogen removal reached 67%. A bioreactor (50 L) was used to further assess the heterotrophic nitrification and aerobic denitrification abilities of Rhodococcus sp. CPZ24. The results showed that 85% of the ammonium nitrogen (100 mg L-1) was transformed to nitrification products (NO3--N and NO2--N) (13%), intracellular nitrogen (24%), and gaseous denitrification products (48%) within 25 h. The ammonium nitrogen removal rate was 3.4 mg L-1 h(-1). The results indicate that the strain CPZ24 carries out simultaneous nitrification and denitrification, demonstrating a potential use of the strain for wastewater treatment. (C) 2012 Elsevier Ltd. All rights reserved.

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