title: Effects of acidified aqueous glycerol and glycerol carbonate pretreatment of rice husk on the enzymatic digestibility, structural characteristics, and bioethanol production.
abstract: Rice husk as an abundant biomass was used in this study, and it contained 30.1% glucan and 13.5% xylan, 22.4% lignin. The pretreated rice husk with glycerol carbonate and acidified aqueous glycerol (10% water) at 90°C and 130°C for 60min had the maximum yield of glucan digestibility which was 78.2% and 69.7% respectively, using cellulase for 72h. The simultaneous saccharification and fermentation was conducted anaerobically at 37°C with Saccharomyces cerevisiae, 5% w/v glucan and 10FPU/g glucan of cellulase. 11.58 and 8.84g/L was the highest ethanol concentration after 3days of incubation form pretreated rice husk with glycerol carbonate and acidified aqueous glycerol respectively.
authors.affiliation: School of Chemical Engineering and Chemistry, Mapúa Institute of Technology, Intramuros, Manila, Philippines. Electronic address: mebrahimi@mymail.mapua.edu.ph.
authors.forename: Majid
authors.initials: M
authors.lastname: Ebrahimi
authors.affiliation: Research Center for the Natural and Applied Sciences, University of Santo Tomas, Manila, Philippines.
authors.forename: Oliver B
authors.initials: OB
authors.lastname: Villaflores
authors.affiliation: Bioengineering Institute, The University of Auckland, Auckland City, New Zealand.
authors.forename: Emma E
authors.initials: EE
authors.lastname: Ordono
authors.affiliation: School of Chemical Engineering and Chemistry, Mapúa Institute of Technology, Intramuros, Manila, Philippines.
authors.forename: Alvin R
authors.initials: AR
authors.lastname: Caparanga
mesh_terms: D056804:Biofuels; D018533:Biomass; D050260:Carbohydrate Metabolism / Q000187:drug effects; D002254:Carbonates / Q000494:pharmacology*; D002480:Cellulase / Q000378:metabolism*; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation / Q000187:drug effects; D005990:Glycerol / Q000031:analogs & derivatives* / Q000494:pharmacology*; D006851:Hydrochloric Acid / Q000494:pharmacology*; D012275:Oryza / Q000737:chemistry*; D012441:Saccharomyces cerevisiae / Q000378:metabolism; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014866:Waste Products; D014867:Water / Q000737:chemistry
chemical_list: D056804:Biofuels; D002254:Carbonates; D014866:Waste Products; D014867:Water; D000431:Ethanol; D002480:Cellulase; D005990:Glycerol; D006851:Hydrochloric Acid
keywords: Acidified glycerol; Glucan digestibility; Glycerol carbonate pretreatment; Rice husk; SSF