title: Performance and diversity of polyvinyl alcohol-degrading bacteria under aerobic and anaerobic conditions.
abstract: OBJECTIVE
  To compare the degradation performance and biodiversity of a polyvinyl alcohol-degrading microbial community under aerobic and anaerobic conditions.
  
  
  RESULTS
  An anaerobic-aerobic bioreactor was operated to degrade polyvinyl alcohol (PVA) in simulated wastewater. The degradation performance of the bioreactor during sludge cultivation and the microbial communities in each reactor were compared. Both anaerobic and aerobic bioreactors demonstrated high chemical oxygen demand removal efficiencies of 87.5 and 83.6 %, respectively. Results of 16S rDNA sequencing indicated that Proteobacteria dominated in both reactors and that the microbial community structures varied significantly under different operating conditions. Both reactors obviously differed in bacterial diversity from the phyla Planctomycetes, Chlamydiae, Bacteroidetes, and Chloroflexi. Betaproteobacteria and Alphaproteobacteria dominated, respectively, in the anaerobic and aerobic reactors.
  
  
  CONCLUSIONS
  The anaerobic-aerobic system is suitable for PVA wastewater treatment, and the microbial genetic analysis may serve as a reference for PVA biodegradation.
authors.affiliation: School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450011, China. huangjianpingh@163.com.
authors.forename: Jianping
authors.initials: J
authors.lastname: Huang
authors.affiliation: School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450011, China.
authors.forename: Shisu
authors.initials: S
authors.lastname: Yang
authors.affiliation: School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450011, China.
authors.forename: Siqi
authors.initials: S
authors.lastname: Zhang
mesh_terms: D000693:Anaerobiosis; D001419:Bacteria / Q000145:classification* / Q000235:genetics / Q000378:metabolism; D001673:Biodegradation, Environmental; D044822:Biodiversity; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D012336:RNA, Ribosomal, 16S / Q000235:genetics*; D017422:Sequence Analysis, DNA / Q000379:methods; D062065:Wastewater / Q000737:chemistry
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D011142:Polyvinyl Alcohol; D012336:RNA, Ribosomal, 16S; D062065:Wastewater
keywords: Anaerobic–aerobic bioreactor; Degradation performance; Microbial community; Polyvinyl alcohol wastewater