title: Cathodic bacterial community structure applying the different co-substrates for reductive decolorization of Alizarin Yellow R.
abstract: Selective enrichment of cathodic bacterial community was investigated during reductive decolorization of AYR fedding with glucose or acetate as co-substrates in biocathode. A clear distinction of phylotype structures were observed between glucose-fed and acetate-fed biocathodes. In glucose-fed biocathode, Citrobacter (29.2%), Enterococcus (14.7%) and Alkaliflexus (9.2%) were predominant, and while, in acetate-fed biocathode, Acinetobacter (17.8%) and Achromobacter (6.4%) were dominant. Some electroactive or reductive decolorization genera, like Pseudomonas, Delftia and Dechloromonas were commonly enriched. Both of the higher AYR decolorization rate (k(AYR)=0.46) and p-phenylenediamine (PPD) generation rate (k(PPD)=0.38) were obtained fed with glucose than acetate (k(AYR)=0.18; k(PPD)=0.16). The electrochemical behavior analysis represented a total resistance in glucose-fed condition was about 73.2% lower than acetate-fed condition. The different co-substrate types, resulted in alteration of structure, richness and composition of bacterial communities, which significantly impacted the performances and electrochemical behaviors during reductive decolorization of azo dyes in biocathode.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), No. 73 Huanghe Road, Harbin 150090, PR China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), No. 73 Huanghe Road, Harbin 150090, PR China.
authors.forename: Zhi-Ling
authors.initials: ZL
authors.lastname: Li
authors.affiliation: School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, PR China.
authors.forename: You-Zhao
authors.initials: YZ
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), No. 73 Huanghe Road, Harbin 150090, PR China.
authors.forename: Chun-Xue
authors.initials: CX
authors.lastname: Yang
authors.affiliation: Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Pohang 790-784, South Korea; Division of Environmental Catalysis, Research Institute of Industrial Science and Technology, P.O. Box 135, Pohang 790-600, South Korea.
authors.forename: Jong Shik
authors.initials: JS
authors.lastname: Chung
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), No. 73 Huanghe Road, Harbin 150090, PR China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China. Electronic address: waj0578@hit.edu.cn.
authors.forename: Ai-Jie
authors.initials: AJ
authors.lastname: Wang
mesh_terms: D000085:Acetates / Q000378:metabolism; D000150:Acinetobacter / Q000235:genetics / Q000378:metabolism; D001391:Azo Compounds / Q000737:chemistry* / Q000378:metabolism; D001419:Bacteria / Q000145:classification / Q000235:genetics; D002954:Citrobacter / Q000235:genetics / Q000378:metabolism; D004396:Coloring Agents / Q000737:chemistry* / Q000378:metabolism; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes / Q000382:microbiology*; D016983:Enterococcus / Q000235:genetics / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D059013:Microbial Consortia / Q000235:genetics / Q000502:physiology*; D010655:Phenylenediamines / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods
chemical_list: D000085:Acetates; D001391:Azo Compounds; D004396:Coloring Agents; D010655:Phenylenediamines; C549930:alizarin yellow R; D005947:Glucose; C029728:4-phenylenediamine
keywords: Alizarin Yellow R (AYR); Bacterial community structure; Biocathode; Bioelectrochemcial system (BES); Reductive decolorization