title: Start-up of a spiral periphyton bioreactor (SPR) for removal of COD and the characteristics of the associated microbial community.
abstract: Periphyton-based bioreactors are widely accepted for removing various pollutants from wastewater; however, the slow start-up and low efficiency in widely fluctuating temperatures limit its application. A spiral periphyton bioreactor (SPR) was developed and its COD removal capability and the associated microbial communities were investigated. This SPR can be easily backwashed to stimulate periphyton growth and efficiently remove COD at temperatures ranging from 4 to 30 °C. The species richness and evenness of the periphyton community increased during domestication, while its functional diversity and organic carbon metabolic vitality were higher after 30 days domestication. Cyanobacteria were the main components of the SPR and produced an aerobic environment, while Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria and Sphingobacteria were the microorganisms responsible for COD removal. This study provides valuable insights into changes in pivotal microorganisms of the periphyton community during domestication, and indicates that SPR is simple to operate and efficient in COD removal.
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing 210008, PR China.
authors.forename: Haidong
authors.initials: H
authors.lastname: Shangguan
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing 210008, PR China; Laboratory of Protistology and Aquatic Ecology, Department of Biology, Ghent University, Krijgslaan 281-S8, 9000 Ghent, Belgium.
authors.forename: Junzhuo
authors.initials: J
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing 210008, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: School of Civil Engineering, East China Jiaotong University, 808 Shuang Gang East Road, Nanchang, Jiangxi 330013, PR China.
authors.forename: Zhengong
authors.initials: Z
authors.lastname: Tong
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing 210008, PR China. Electronic address: yhwu@issas.ac.cn.
authors.forename: Yonghong
authors.initials: Y
authors.lastname: Wu
mesh_terms: D001419:Bacteria / Q000187:drug effects / Q000378:metabolism*; D044822:Biodiversity; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D002244:Carbon / Q000494:pharmacology; D003116:Color; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000295:instrumentation*
chemical_list: D002244:Carbon
keywords: COD; Microbial diversity; Room/low temperature; SPR