title: Methanogenic degradation of toilet-paper cellulose upon sewage treatment in an anaerobic membrane bioreactor at room temperature.
abstract: Toilet-paper cellulose with rich but refractory carbon sources, are the main insoluble COD fractions in sewage. An anaerobic membrane bioreactor (AnMBR) was configured for sewage treatment at room temperature and its performance on methanogenic degradation of toilet paper was highlighted. The results showed, high organic removal (95%), high methane conversion (90%) and low sludge yield (0.08gVSS/gCOD) were achieved in the AnMBR. Toilet-paper cellulose was fully biodegraded without accumulation in the mixed liquor and membrane cake layer. Bioconversion efficiency of toilet paper approached 100% under a high organic loading rate (OLR) of 2.02gCOD/L/d and it could provide around 26% of total methane generation at most of OLRs. Long sludge retention time and co-digestion of insoluble/soluble COD fractions achieving mutualism of functional microorganisms, contributed to biodegradation of toilet-paper cellulose. Therefore the AnMBR successfully implemented simultaneously methanogenic bioconversion of toilet-paper cellulose and soluble COD in sewage at room temperature.
authors.affiliation: International S&T Cooperation Center for Urban Alternative Water Resources Development, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, 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: Rong
authors.initials: R
authors.lastname: Chen
authors.affiliation: Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China.
authors.forename: Yulun
authors.initials: Y
authors.lastname: Nie
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: Jiang
authors.initials: J
authors.lastname: Wu
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: Tetsuya
authors.initials: T
authors.lastname: Utashiro
authors.affiliation: School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, PR China.
authors.forename: Jianbo
authors.initials: J
authors.lastname: Lu
authors.affiliation: Tianjin Municipal Engineering Design & Research Institute, Tianjin 300051, PR China.
authors.forename: Shangchao
authors.initials: S
authors.lastname: Yue
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: Hongyu
authors.initials: H
authors.lastname: Jiang
authors.affiliation: International S&T Cooperation Center for Urban Alternative Water Resources Development, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China.
authors.forename: Lu
authors.initials: L
authors.lastname: Zhang
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: D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002244:Carbon / Q000378:metabolism; D002482:Cellulose / Q000378:metabolism*; D004867:Equipment Design; D008567:Membranes, Artificial; D008697:Methane / Q000378:metabolism; D010209:Paper; D012722:Sewage; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*
chemical_list: D008567:Membranes, Artificial; D012722:Sewage; D002244:Carbon; D002482:Cellulose; D008697:Methane
keywords: Anaerobic membrane bioreactor; Methanogenic degradation; Room temperature; Sewage; Toilet-paper cellulose