Effect of Different Nitrogen Sources on Ethanolic Fermentation of Glucose by Zymomonas mobilίs

Sreekumar, O. and Basappa, S. C. (1995) Effect of Different Nitrogen Sources on Ethanolic Fermentation of Glucose by Zymomonas mobilίs. Journal of Food Science and Technology, 32 (3). pp. 252-254.

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Abstract

Among several organic and inorganic nitrogen sources tried, urea (0.5 g/1) was found to be better especially than ammonium sulphate, which is generally used in defined medium for ethanol production by Zymomonas mobilis. Calcium pantothenate has been found to be an essential vitamin for ethanol production. Addition of yeast extract as a source of both nitrogen and vitamins, rather than peptone, was effective for obtaining enhanced yield of ethanol, particularly in high glucose (200-300 g/1) fermentation. A final pH of 4.1 to 4.4 in case of urea, as compared to that of 3.3 to 3.9 with the use of ammonium sulphate, appears to contribute to enhanced ethanol production, as the bacterium is intolerant to lower pH.

Item Type:	Article
Uncontrolled Keywords:	Zymomonas mobilis, Ethanol, Nitrogen sources, Glucose, Vitamins, Medium pH
Subjects:	600 Technology > 05 Chemical engineering > 04 Fermentation Technology
Divisions:	Food Microbiology
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	11 Dec 2007 10:06
Last Modified:	03 May 2018 11:16
URI:	http://ir.cftri.res.in/id/eprint/1592

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