title: Efficient methanogenic degradation of alcohol ethoxylates and microbial community acclimation in treatment of municipal wastewater using a submerged anaerobic membrane bioreactor.
abstract: The effect of alcohol ethoxylates on the treatment of municipal wastewater by a submerged anaerobic membrane bioreactor was investigated by a 400days operation including the treatment efficiency, methanogenic activity of sludge and microbial community structure. The results indicated that alcohol ethoxylates (5.0-200mg/L) was efficiently degraded and converted into methane due to the similar COD removal 95.5-98.8% and rising biogas production rate (2.30-4.25L/d) compared with control (96.8% and 2.55L/d). The microbes in sludge could copy with the presence of alcohol ethoxylates in wastewater by releasing more SMP and EPS, which caused a higher membrane fouling rate. Moreover, via long term acclimation, the specific methanogenic activity of sludge was greatly enhanced due to the changes of microbial community structure. Hence, the sludge self-acclimation to alcohol ethoxylates was responsible to the efficient methane recovery in treatment of municipal wastewater.
authors.affiliation: Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
authors.forename: Yulun
authors.initials: Y
authors.lastname: Nie
authors.affiliation: Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
authors.forename: Qigui
authors.initials: Q
authors.lastname: Niu
authors.affiliation: Sewerage Works Division, Sewerage and Wastewater Management Department, Water and Disaster Management Bureau, 2-1-3 Kasumigaseki, Chiyodaku, Tokyo, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kato
authors.affiliation: Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
authors.forename: Toshiki
authors.initials: T
authors.lastname: Sugo
authors.affiliation: Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China. Electronic address: xktian@cug.edu.cn.
authors.forename: Xike
authors.initials: X
authors.lastname: Tian
authors.affiliation: Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan. Electronic address: gyokuyu.ri.a5@tohoku.ac.jp.
authors.forename: Yu-You
authors.initials: YY
authors.lastname: Li
mesh_terms: D000064:Acclimatization; D000438:Alcohols / Q000737:chemistry*; D000693:Anaerobiosis; D001421:Bacteria, Anaerobic / Q000235:genetics; D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002947:Cities; D004269:DNA, Bacterial / Q000737:chemistry; D000431:Ethanol; D005374:Filtration; D006863:Hydrogen-Ion Concentration; D008697:Methane / Q000737:chemistry*; D017422:Sequence Analysis, DNA; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D000438:Alcohols; D056804:Biofuels; D004269:DNA, Bacterial; D000431:Ethanol; D008697:Methane; D012722:Sewage; D062065:Wastewater
keywords: Alcohol ethoxylates; Anaerobic membrane bioreactor; Microbial analysis; Municipal wastewater; Treatment