title: Production of fuel ethanol from bamboo by concentrated sulfuric acid hydrolysis followed by continuous ethanol fermentation.
abstract: An efficient process for the production of fuel ethanol from bamboo that consisted of hydrolysis with concentrated sulfuric acid, removal of color compounds, separation of acid and sugar, hydrolysis of oligosaccharides and subsequent continuous ethanol fermentation was developed. The highest sugar recovery efficiency was 81.6% when concentrated sulfuric acid hydrolysis was carried out under the optimum conditions. Continuous separation of acid from the saccharified liquid after removal of color compounds with activated carbon was conducted using an improved simulated moving bed (ISMB) system, and 98.4% of sugar and 90.5% of acid were recovered. After oligosaccharide hydrolysis and pH adjustment, the unsterilized saccharified liquid was subjected to continuous ethanol fermentation using Saccharomycescerevisiae strain KF-7. The ethanol concentration, the fermentation yield based on glucose and the ethanol productivity were approximately 27.2 g/l, 92.0% and 8.2 g/l/h, respectively. These results suggest that the process is effective for production of fuel ethanol from bamboo.
authors.affiliation: Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555, Japan.
authors.forename: Zhao-Yong
authors.initials: ZY
authors.lastname: Sun
authors.forename: Yue-Qin
authors.initials: YQ
authors.lastname: Tang
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Iwanaga
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Sho
authors.forename: Kenji
authors.initials: K
authors.lastname: Kida
mesh_terms: D056804:Biofuels; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D002241:Carbohydrates / Q000737:chemistry; D004867:Equipment Design; D000431:Ethanol / Q000737:chemistry*; D005285:Fermentation; D005947:Glucose / Q000737:chemistry; D006868:Hydrolysis; D012441:Saccharomyces cerevisiae / Q000378:metabolism*; D031787:Sasa; D013464:Sulfuric Acids / Q000737:chemistry*
chemical_list: D056804:Biofuels; D002241:Carbohydrates; D013464:Sulfuric Acids; D000431:Ethanol; D005947:Glucose; C033158:sulfuric acid