title: Serial completely stirred tank reactors for improving biogas production and substance degradation during anaerobic digestion of corn stover.
abstract: Several completely stirred tank reactors (CSTR) connected in series for anaerobic digestion of corn stover were investigated in laboratory scale. Serial anaerobic digestion systems operated at a total HRT of 40days, and distribution of HRT are 10+30days (HRT10+30d), 20+20days (HRT20+20d), and 30+10days (HRT30+10d) were compared to a conventional one-step CSTR at the same HRT of 40d. The results showed that in HRT10+30d serial system, the process became very unstable at organic load of 50gTS·L-1. The HRT20+20d and HRT30+10d serial systems improved methane production by 8.3-14.6% compared to the one-step system in all loads of 50, 70, 90gTS·L-1. The conversion rates of total solid, cellulose, and hemicellulose were increased in serial anaerobic digestion systems compared to single system. The serial systems showed more stable process performance in high organic load. HRT30+10d system showed the best biogas production and conversions among all systems.
authors.affiliation: Center for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors.forename: YuQian
authors.initials: Y
authors.lastname: Li
authors.affiliation: Center for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors.forename: ChunMei
authors.initials: C
authors.lastname: Liu
authors.affiliation: Center for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China; Department of Water Supply and Environmental Engineering, Arba Minch University, P.O. Box 21, Arba Minch, Ethiopia.
authors.forename: Akiber Chufo
authors.initials: AC
authors.lastname: Wachemo
authors.affiliation: Center for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors.forename: HaiRong
authors.initials: H
authors.lastname: Yuan
authors.affiliation: Center for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors.forename: DeXun
authors.initials: D
authors.lastname: Zou
authors.affiliation: Center for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors.forename: YanPing
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Center for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China. Electronic address: xjlibuct@gmail.com.
authors.forename: XiuJin
authors.initials: X
authors.lastname: Li
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D019149:Bioreactors; D002482:Cellulose / Q000378:metabolism; D008697:Methane / Q000378:metabolism; D003313:Zea mays / Q000378:metabolism*
chemical_list: D056804:Biofuels; D002482:Cellulose; D008697:Methane
keywords: Anaerobic digestion; Biogas; CSTR; Corn stover; Serial digestion