Process for the hydrolysis of starch and the continuous fermenta

Details Process for the hydrolysis of starch and the continuous fermenta Process for the hydrolysis of starch and the continuous fermenta

1979-05-29

1981-01-06

Shapiro, Lionel M.

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

Preparing oxygen-containing organic compound

435813, 435940, C12P 714

Patent

active

042437504

ABSTRACT:
Starch is converted to ethanol by a process in which an aqueous starch slurry is hydrolyzed in sequential liquefication and saccharification steps to provide sterile saccharified starch solution containing from about 60 to about 80 weight percent of fermentable sugar based on the weight of the original starch present and the fermentable sugar is thereafter continuously converted by fermentation to dilute aqueous ethanol ("beer") in a series of agitated fermentation vessels which contain progressively more ethanol and less fermentable sugar employing at least two strains of yeast for the fermentation, one of which provides a high rate of ethanol production in a fermentation medium containing a relatively low concentration of ethanol and a relatively high concentration of fermentable sugar and the other of which provides a high rate of ethanol production in a fermentation medium containing a relatively high concentration of ethanol and a relatively low concentration of fermentable sugar.

REFERENCES:
patent: 2419960 (1947-05-01), Legg
patent: 2431004 (1947-11-01), Wickerham
patent: 3337414 (1967-08-01), Wilson
patent: 4009075 (1977-02-01), Hoge
patent: 4132595 (1979-01-01), Hebeda et al.

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