Nitrogen removal characteristics and potential application of the heterotrophic nitrifying-aerobic denitrifying bacteria Pseudomonas mendocina S16 and Enterobacter cloacae DS ' 5 isolated from aquaculture wastewater ponds

文献类型： 外文期刊

第一作者： Shu, Hu

作者： Shu, Hu;Sun, Huiming;Huang, Wen;Zhao, Yang;Ma, Yonghao;Chen, Wei;Sun, Yuping;Chen, Xiaoying;Zhong, Ping;Wu, Xiaopeng;Huang, Minwei;Liao, Sentai;Shu, Hu;Sun, Huiming;Huang, Wen;Zhao, Yang;Ma, Yonghao;Chen, Wei;Yang, Huirong

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关键词： Aquaculture tail water treatment; Heterotrophic nitrification-aerobic denitrification; Denitrification genes; Immobilized culture system

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.889； 五年影响因子：11.139 ）

ISSN： 0960-8524

年卷期： 2022 年 345 卷

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收录情况： SCI

摘要： Two biosafety strains, identified as Pseudomonas mendocina S16 and Enterobacter cloacae DS'5, were isolated from freshwater aquaculture ponds and showed significant heterotrophic nitrification-aerobic denitrification abilities. Within 48 h, the inorganic nitrogen removal efficiencies in the two strains were 66.59 %-97.97 % (S16) and 72.27 %-96.44 % (DS'5). The optimal conditions for organic nitrogen removal of the two strains were temperature 20-35 degrees C and carbon/nitrogen (C/N) ratio 10-20 while using sodium citrate as the carbon source. Sequence amplification demonstrated the presence of the denitrification genes in both the two strains, and quantitative real-time PCR results showed that the coupled expression of nap + nar would improve the nitrate removal rate in S16. The nitrogen removal efficiencies of the two strains in immobilization culture systems were 79.80 %-98.58 % (S16) and 60.80 %-98.40 % (DS'5). This study indicated the great potential application of the two strains in aquaculture tail water treatment.

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