Enzyme Microb Technol. 2000 Sep 1;27(6):362-370.

Production of alcohol from raw wheat flour by Amyloglucosidase and Saccharomyces cerevisiae.

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Université Montpellier II. ISIM., Laboratoire de Génie Biologique et Science des Aliments, équipe de Biochimie et Microbiologie Industrielles, place E. Bataillon, 34095 5, Montpellier cedex, France

Abstract

Ethanol production, by a simultaneous saccharification and fermentation process from raw wheat flour, has been performed by Saccharomyces cerevisiae and a low level of amyloglucosidase enzyme. The fermentation time was about 60 h after a 6 h pre-saccharification, with an amyloglucosidase (AMG) level of 270 AGU. kg(-1) starch, but only 31 h with a simultaneous saccharification fermentation process (SSF). When an AMG level of 540 AGU. kg(-1) starch was used, the time decreased to 21 h, giving an ethanol concentration of 67 g. l(-1). Sugar composition of the wort after the liquefaction may be responsible of the difference between these two process. Maltose, a fermentable sugar, was produced in high concentration during the liquefaction, allowing a shorter process period, counteracting the effect of the slow starch hydrolysis at 35 degrees C (SSF temperature).

PMID:: 10938415; [PubMed - as supplied by publisher]

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Production of alcohol from raw wheat flour by Amyloglucosidase and Saccharomyces cerevisiae.

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