title: Butanol fermentation from microalgae-derived carbohydrates after ionic liquid extraction.
abstract: Lipid extracted algae (LEA) is an attractive feedstock for alcohol fuel production as it is a non-food crop which is largely composed of readily fermented carbohydrates like starch rather than the more recalcitrant lignocellulosic materials currently under intense development. This study compares the suitability of ionic liquid extracted algae (ILEA) and hexane extracted algae (HEA) for acetone, butanol, and ethanol (ABE) fermentation. The highest butanol titers (8.05 g L(-1)) were achieved with the fermentation of the acid hydrolysates of HEA, however, they required detoxification to support product formation after acid hydrolysis while ILEA did not. Direct ABE fermentation of ILEA and HEA (without detoxification) starches resulted in a butanol titer of 4.99 and 6.63 g L(-1), respectively, which significantly simplified the LEA to butanol process. The study demonstrated the compatibility of producing biodiesel and butanol from a single feedstock which may help reduce the feedstock costs of each individual process.
authors: Department of Chemical & Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 3K7, Canada.
authors: Kai
authors: K
authors: Gao
authors: Department of Chemical & Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 3K7, Canada.
authors: Valerie
authors: V
authors: Orr
authors: Department of Chemical & Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 3K7, Canada; Department of Biochemical Engineering, AVT - Aachener Verfahrenstechnik, RWTH Aachen University, Worringer Weg 1, 52074 Aachen, Germany. Electronic address: lrehmann@uwo.ca.
authors: Lars
authors: L
authors: Rehmann
mesh_terms: D020001:1-Butanol / Q000378:metabolism*; D000096:Acetone / Q000378:metabolism; D056804:Biofuels; D018533:Biomass; D000440:Butanols; D048408:Chlorella vulgaris / Q000378:metabolism*; D003013:Clostridium / Q000378:metabolism*; D000431:Ethanol / Q000378:metabolism; D005285:Fermentation; D006868:Hydrolysis; D052578:Ionic Liquids; D058086:Microalgae / Q000378:metabolism*; D013213:Starch / Q000378:metabolism
chemical_list: D056804:Biofuels; D000440:Butanols; D052578:Ionic Liquids; D000096:Acetone; D000431:Ethanol; D020001:1-Butanol; D013213:Starch
keywords: ABE fermentation; Acid hydrolysis; Hexane; Ionic liquid; Lipid-extracted algae