title: Acetone-butanol-ethanol production in a novel continuous flow system.
abstract: This study investigates the potential of using a novel integrated biohydrogen reactor clarifier system (IBRCS) for acetone-butanol-ethanol (ABE) production using a mixed culture at different organic loading rates (OLRs). The results of this study showed that using a setting tank after the fermenter and recycle the settled biomass to the fermenter is a practical option to achieve high biomass concentration in the fermenter and thus sustainable ABE fermentation in continuous mode. The average ABE concentrations of 2.3, 7.0, and 14.6gABE/L which were corresponding to ABE production rates of 0.4, 1.4, and 2.8gABE/Lreactorh were achieved at OLRs of 21, 64, and 128gCOD/Lreactord, respectively. The main volatile fatty acids components in the effluent were acetic, propionic, and butyric acids. Acetic acid was the predominant component in the OLR-1, while butyric acid was the predominant acid in OLRs 2 and 3.
authors.affiliation: University of Waterloo, Waterloo, Ontario N2L 3G1, Canada. Electronic address: sayedbesh@yahoo.com.
authors.forename: Elsayed
authors.initials: E
authors.lastname: Elbeshbishy
authors.affiliation: University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Bipro Ranjan
authors.initials: BR
authors.lastname: Dhar
authors.affiliation: GreenField Ethanol Inc., Chatham, Ontario N7M 5J4, Canada.
authors.forename: Hisham
authors.initials: H
authors.lastname: Hafez
authors.affiliation: University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Hyung-Sool
authors.initials: HS
authors.lastname: Lee
mesh_terms: D000096:Acetone / Q000302:isolation & purification / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D000440:Butanols / Q000302:isolation & purification / Q000378:metabolism*; D000431:Ethanol / Q000302:isolation & purification / Q000378:metabolism*; D005232:Fatty Acids, Volatile / Q000378:metabolism*; D005947:Glucose / Q000378:metabolism*; D012212:Rheology / Q000379:methods
chemical_list: D000440:Butanols; D005232:Fatty Acids, Volatile; D000096:Acetone; D000431:Ethanol; D005947:Glucose
keywords: ABE fermentation; Continuous; Glucose; Gravity settler; OLR