title: Evaluation of biobutanol production from non-pretreated rice straw hydrolysate under non-sterile environmental conditions.
abstract: The study aims to investigate a cost-effective approach to convert non-pretreated rice straw hydrolysate into biobutanol. The influences of the initial cell concentration and incubation temperature on biobutanol production were evaluated under both sterile and non-sterile conditions. Results indicate that 100% glucose utilization could be achieved for initial cell concentrations greater than 2100 mg/L under both sterile and non-sterile conditions. Regression analyses resolve that under the sterile condition, the maximum butanol productivity of 1.45 g/L/d was projected at 1.96 g/L of cells and 32.3 °C, while the maximum butanol yield of 0.22 g/g was predicted at 2.01 g/L of cells and 26.3 °C. These two maximum values could not be projected by the regression analyses for the non-sterile condition. However, this study confirms that a high initial cell concentration of Clostridium saccharoperbutylacetonicum N1-4 can minimize interference from other microbes so that non-sterile biobutanol production is comparable to sterile biobutanol production.
authors.affiliation: Department of Environmental Engineering, National Ilan University, Yilan 260, Taiwan. albert@niu.edu.tw
authors.forename: Wen-Hsing
authors.initials: WH
authors.lastname: Chen
authors.forename: Yi-Chun
authors.initials: YC
authors.lastname: Chen
authors.forename: Jih-Gaw
authors.initials: JG
authors.lastname: Lin
mesh_terms: D000096:Acetone / Q000378:metabolism; D001089:Arabinose / Q000378:metabolism; D056804:Biofuels; D000440:Butanols / Q000378:metabolism*; D003013:Clostridium / Q000378:metabolism; D000431:Ethanol / Q000378:metabolism; D005285:Fermentation; D005690:Galactose / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D006868:Hydrolysis; D007700:Kinetics; D012275:Oryza / Q000737:chemistry*; D012044:Regression Analysis; D013242:Sterilization; D014866:Waste Products / Q000032:analysis*
chemical_list: D056804:Biofuels; D000440:Butanols; D014866:Waste Products; D000096:Acetone; D000431:Ethanol; D001089:Arabinose; D005947:Glucose; D005690:Galactose