title: Fermentative production of butanol: Perspectives on synthetic biology.
abstract: Apprehensions relating to global warming, climate change, pollution, rising energy demands as well as fluctuating crude oil prices and supply are leading to a shift in global interest to find suitable alternatives to fossil fuels. This review aims to highlight the many different facets of butanol as an advanced next-generation transportation biofuel. Butanol has fuel properties almost on a par with gasoline, such as high energy content, low vapor pressure, non-hygroscopic nature, less volatility, flexible fuel blends and high octane number. The paper reviews some recent advances in acetone-butanol-ethanol fermentation with special emphasis on the primary challenges encountered in butanol fermentation, including butanol toxicity, solvent intolerance and bacteriophage contamination. The mechanisms for butanol recovery techniques have been covered along with their benefits and limitations. A comprehensive discussion of genetic and metabolic engineering of butanol-producing microorganisms is made for the prospective development of industrially-relevant strains that can overcome the technical challenges involved in efficient butanol production.
authors.affiliation: Department of Earth and Space Science and Engineering, York University, Ontario, Canada.
authors.forename: Sonil
authors.initials: S
authors.lastname: Nanda
authors.affiliation: Department of Biology, York University, Ontario, Canada.
authors.forename: Dasantila
authors.initials: D
authors.lastname: Golemi-Kotra
authors.affiliation: Department of Biology, York University, Ontario, Canada.
authors.forename: John C
authors.initials: JC
authors.lastname: McDermott
authors.affiliation: Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatchewan, Canada.
authors.forename: Ajay K
authors.initials: AK
authors.lastname: Dalai
authors.affiliation: Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), Centre National de la Recherche Scientifique (CNRS), Orléans, France.
authors.forename: Iskender
authors.initials: I
authors.lastname: Gökalp
authors.affiliation: Department of Earth and Space Science and Engineering, York University, Ontario, Canada. Electronic address: janusz.kozinski@lassonde.yorku.ca.
authors.forename: Janusz A
authors.initials: JA
authors.lastname: Kozinski
mesh_terms: D001419:Bacteria / Q000235:genetics* / Q000378:metabolism* / Q000821:virology; D001435:Bacteriophages / Q000378:metabolism; D000440:Butanols / Q000737:chemistry / Q000378:metabolism* / Q000633:toxicity; D005285:Fermentation; D060847:Metabolic Engineering; D058615:Synthetic Biology
chemical_list: D000440:Butanols
keywords: Acetone-butanol-ethanol fermentation; Butanol; Butanol toxicity; Clostridium; Genetic engineering; Metabolic engineering