Poster Presentation 6A-26 Pretreatment of Barley Husks for Ethanol Production Beatriz Palmarola-Adrados, Laura Diego-Meliveo, María Learra-Martínez, Mats Galbe, Guido Zacchi* Department of Chemical Engineering 1 Lund University P. O. Box 124 SE-221 00, Lund, Sweden Phone: 46 46 222 82 97; Fax: 46 46 222 45 26; E-mail: firstname.lastname@example.org Barley husks, produced worldwide in large quantities as a by-product of the barley milling industry, were identified as a potentially promising feedstock for ethanol production. This biomass consists mainly of glucan (29 %), xylan (24 %), arabinan (4 %) and lignin (14 %). Enzymatic hydrolysis is not enough to hydrolyze these polysaccharides to simple sugars and, therefore, chemical and physical methods are also required. Several promising pretreatment methods, with and without addition of acid, and enzymatic processes for conversion of cellulose and hemicellulose to fermentable sugars were evaluated. Pretreatment was performed either in a steam pretreatment unit or in a microwave oven. The influence of acid concentration, temperature and residence time on the sugar and ethanol yields was investigated. Results from this study will be presented.
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