title: Performance and spatial community succession of an anaerobic baffled reactor treating acetone-butanol-ethanol fermentation wastewater.
abstract: An anaerobic baffled reactor with four compartments (C1-C4) was successfully used for treatment of acetone-butanol-ethanol fermentation wastewater and methane production. The chemical oxygen demand (COD) removal efficiency was 88.2% with a CH(4) yield of 0.25L/(g COD(removed)) when organic loading rate (OLR) was 5.4kg CODm(-3)d(-1). C1 played the most important role in solvents (acetone, butanol and ethanol) and COD removal. Community structure of C2 was similar to that in C1 at stage 3 with higher OLR, but was similar to those in C3 and C4 at stages 1-2 with lower OLR. This community variation in C2 was consistent with its increased role in COD and solvent removal at stage 3. During community succession from C1 to C4 at stage 3, abundance of Firmicutes (especially OTUs ABRB07 and ABRB10) and Methanoculleus decreased, while Bacteroidetes and Methanocorpusculum became dominant. Thus, ABRB07 coupled with Methanoculleus and/or acetogen (ABRB10) may be key species for solvents degradation.
authors.affiliation: Key Laboratory of Synthetic Biology, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Rd., Shanghai 200032, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Wei
authors.forename: Wei
authors.initials: W
authors.lastname: Xiao
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Zhou
authors.forename: Xing
authors.initials: X
authors.lastname: Yan
mesh_terms: D000096:Acetone / Q000737:chemistry / Q000378:metabolism; D001421:Bacteria, Anaerobic / Q000145:classification / Q000235:genetics / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D000440:Butanols / Q000737:chemistry / Q000378:metabolism; D000431:Ethanol / Q000737:chemistry / Q000378:metabolism; D005285:Fermentation; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
chemical_list: D000440:Butanols; D014874:Water Pollutants, Chemical; D000096:Acetone; D000431:Ethanol