title: Saccharification and alcohol fermentation in starch solution of steam-exploded potato.
abstract: Steam explosion pretreatment of potato for the efficient production of alcohol was experimentally studied. The amount of water-soluble starch increased with the increase of steam pressure, but the amounts of methanol-soluble material and Klason lignin remained insignificant, regardless of steam pressure. The potatoes exploded at high pressure were hydrolyzed into a low molecular liquid starch, and then easily converted into ethanol by simultaneous saccharification and fermentation using mixed microorganisms: an amylolytic microorganism, Aspergillus awamori, and a fermentation microorganism, Saccharomyces cerevisiae. The maximal ethanol concentration was 4.2 g/L in a batch culture at 15 g/L starch concentration, and 3.6 g/L in a continuous culture fed the same starch concentration. In the fed-batch culture, the maximal ethanol concentration increased more than twofold, compared to the batch culture.
authors.affiliation: Department of Chemistry and Chemical Engineering, Faculty of Engineering, Kanazawa University, Japan.
authors.forename: F
authors.initials: F
authors.lastname: Kobayashi
authors.forename: T
authors.initials: T
authors.lastname: Sawada
authors.forename: Y
authors.initials: Y
authors.lastname: Nakamura
authors.forename: M
authors.initials: M
authors.lastname: Ohnaga
authors.forename: M
authors.initials: M
authors.lastname: Godliving
authors.forename: T
authors.initials: T
authors.lastname: Ushiyama
mesh_terms: D001230:Aspergillus / Q000378:metabolism; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D006358:Hot Temperature; D011312:Pressure; D012441:Saccharomyces cerevisiae / Q000378:metabolism; D011198:Solanum tuberosum; D012996:Solutions; D013213:Starch / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism
chemical_list: D012996:Solutions; D014874:Water Pollutants, Chemical; D000431:Ethanol; D013213:Starch