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
作者： Shu, Hu 1 ; Sun, Huiming 1 ; Huang, Wen 1 ; Zhao, Yang 1 ; Ma, Yonghao 1 ; Chen, Wei 1 ; Sun, Yuping 1 ; Chen, Xiaoying 1 ; Zhong, Ping 1 ; Yang, Huirong 3 ; Wu, Xiaopeng 1 ; Huang, Minwei 1 ; Liao, Sentai 1 ;
作者机构： 1.Inst Anim Sci, Guangdong Acad Agr Sci, Key Lab Anim Nutr & Feed Sci South China,Minist A, Guangdong Key Lab Anim Breeding & Nutr,Aquat Res, Guangzhou 510640, Peoples R China
2.Guangzhou Univ, Sch Life Sci, Sch Environm Sci & Engn, Guangzhou 510006, Peoples R China
3.South China Agr Univ, Coll Marine Sci, Guangzhou 510642, Peoples R China
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
页码：
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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