title: Effect of pure oxygen fine bubbles on the organic matter removal and bacterial community evolution treating coal gasification wastewater by membrane bioreactor.
abstract: A lab-scale study was investigated to evaluate the effect of pure oxygen fine bubbles on membrane bioreactor (O2-MBR) performance of treating coal gasification wastewater. Compared with conventional MBR using aeration source of air (CMBR), the removal efficiencies of COD and total phenols increased by 28% and 36%, and the organic compositions of treated effluent represented significant difference that was mainly attributed to the controlled the foam expansion and enhanced the enzymatic activities in O2-MBR. Moreover, membrane fouling mitigation was observed in O2-MBR, probably owing to the less EPS amount and larger PSD. It was notable that the pure oxygen with fine bubbles promoted marked evolution of bacterial community from CMBR to O2-MBR, particularly, the bacterial community richness and diversity in O2-MBR was lower than CMBR, and the genera Phycisphaera, Comamonas, Thauera and Ohtaekwangia composed the top four most relative abundance genera in O2-MBR, giving the total relative abundance of 26.7%.
authors.affiliation: Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou 310023, China. Electronic address: zhuanggao1984@163.com.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Zhuang
authors.affiliation: Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou 310023, China.
authors.forename: Xiaoting
authors.initials: X
authors.lastname: Hong
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Hongjun
authors.initials: H
authors.lastname: Han
authors.affiliation: Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou 310023, China.
authors.forename: Shengdao
authors.initials: S
authors.lastname: Shan
mesh_terms: D001419:Bacteria / Q000187:drug effects* / Q000254:growth & development; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology; D003031:Coal; D005740:Gases / Q000737:chemistry; D008567:Membranes, Artificial; D009930:Organic Chemicals / Q000302:isolation & purification*; D010100:Oxygen / Q000494:pharmacology*; D018505:Waste Management; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology; D014873:Water Pollutants / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods
chemical_list: D003031:Coal; D005740:Gases; D008567:Membranes, Artificial; D009930:Organic Chemicals; D010100:Oxygen; D062065:Wastewater; D014873:Water Pollutants
keywords: Bacterial community evolution; Coal gasification wastewater; Foam control; Membrane fouling; Pure oxygen fine bubbles