Direct fermentation of cassava starch to ethanol by mixed cultures of Endomycopsis fibuligera and Zymomonas mobilis: synergism and limitations.

Reddy, O. V. S. and Basappa, S. C. (1996) Direct fermentation of cassava starch to ethanol by mixed cultures of Endomycopsis fibuligera and Zymomonas mobilis: synergism and limitations. Biotechnology Letters, 18 (11). 1315-1318, 8 ref..

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Abstract

Simultaneous saccharification and fermentation of cassava starch to ethanol was studied. A mixed culture of Endomycopsis fibuligera NRRL 76 and Zymomonas mobilis ZM4 could ferment cassava starch (22.5% w/v) to ethanol (10.5% v/v); the fermentation was more efficient than in the respective monocultures. The combination of culture filtrate of E. fibuligera (containing amylases) and Z. mobilis simultaneously saccharified and fermented the cassava starch to ethanol equally well. Glucoamylase (0.01%) added to the fermentation medium improved ethanol production (13.2% v/v) by the above mixed culture to almost the theoretical level (98%), indicating that this enzyme is a rate-limiting factor in E. fibuligera. Z. mobilis alone also converted enzyme-hydrolysed starch to ethanol at almost theoretical levels (98%). [From En summ.]

Item Type:	Article
Uncontrolled Keywords:	ALCOHOLS-; BACTERIA-; BIOTECHNOLOGY-; CARBOHYDRATES-; CASSAVA-; ETHANOL-; FERMENTATION-; FERMENTATION-PRODUCTS; FUNGI-; MICROORGANISMS-; PROCESSING-; SACCHARIFICATION-; STARCH-; VEGETABLES-SPECIFIC; ZYMOMONAS-; CASSAVA-STARCH; ENDOMYCOPSIS-; STARCHES-
Subjects:	600 Technology > 05 Chemical engineering > 04 Fermentation Technology 600 Technology > 08 Food technology > 23 Vegetables > 01 Cassava-Tapioca
Divisions:	Food Microbiology
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	27 Feb 2018 08:24
Last Modified:	27 Feb 2018 08:24
URI:	http://ir.cftri.res.in/id/eprint/7835

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