Effects of solid-phase denitrification on the nitrate removal and bacterial community structure in recirculating aquaculture system
文献类型： 外文期刊
作者： Qiu, Tianlei 1 ; Liu, Lili 2 ; Gao, Min 2 ; Zhang, Lanhe 3 ; Tursun, Haireti 1 ; Wang, Xuming 2 ;
作者机构： 1.Beijing Univ Chem Technol, Beijing Engn Res Ctr Environm Mat Water Purificat, Beijing 100029, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Beijing Key Lab Agr Genet Resources & Biotechnol, Beijing Agrobiotechnol Res Ctr, Beijing 100097, Peoples R China
3.Northeast Dianli Univ, Sch Chem Engn, Jilin 132012, Peoples R China
4.Heihe Hydrol Bur Heilongjiang Prov, Heihe 164300, Peoples R China
关键词： Nitrate;Solid-phase denitrification;Microbial community;Recirculating aquaculture system;Illumina MiSeq sequencing
期刊名称：BIODEGRADATION （ 影响因子：3.909； 五年影响因子：3.578 ）
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年卷期：
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收录情况： SCI
摘要： A solid-phase denitrification (SPD) reactor packed with poly (3-hydroxybutyrate-co-3-hydroxyvalerate) as a carbon source was incorporated into a recirculating aquaculture system (RAS) to remove accumulated nitrate. Bacterial community structures in different parts of the RAS, including biofilter unit, SPD reactor, and culture water, were analyzed using Illumina MiSeq sequencing technology. The data showed that nitrate levels decreased remarkably in the RAS connected with SPD reactor (RAS-DR). In contrast, nitrate levels increased continuously in the conventional RAS without SPD reactor (RAS-CK). Biofilter unit and culture water in RAS-DR developed lower species richness and higher bacterial community diversity than that in RAS-CK. The bacterial community structure of RAS was significantly affected by the SPD process and the changes included an increase in the proportion of Proteobacteria and Firmicutes and a decrease in Nitrospira abundance in RAS-DR. Firmicutes was the most abundant phylum (56.9 %) and mainly consisted of Clostridium sensu stricto (48.3 %) in SPD reactor.
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