Effects of solid-phase denitrification on the nitrate removal and bacterial community structure in recirculating aquaculture system

详细信息    查看全文

• 作者：Tianlei Qiu ; Lili Liu ; Min Gao ; Lanhe Zhang ; Haireti Tursun ; Xuming Wang
• 刊名：Biodegradation
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：27
• 期：2-3
• 页码：165-178
• 全文大小：1,513 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Soil Science and Conservation
  Geochemistry
  Terrestrial Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Waste Management and Waste Technology
  
• 出版者：Springer Netherlands
• ISSN：1572-9729
• 卷排序：27

文摘

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.KeywordsNitrateSolid-phase denitrificationMicrobial communityRecirculating aquaculture systemIllumina MiSeq sequencing