Fuel alcohol production: optimization of temperature for efficient very-high-gravity fermentation

The time required to end ferment wheat mash decreased as the temperature was increased from 17 to 33 degrees C, but it increased as the concentration of dissolved solids was raised from 14.0 to 36.5 g/100 ml. Ethanol yield was not appreciably affected. Over the range of fermentation temperatures tes...

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Bibliographic Details
Published inApplied and Environmental Microbiology Vol. 60; no. 3; pp. 1048 - 1051
Main Authors Jones, A.M, Ingledew, W.M
Format Journal Article
LanguageEnglish
Published Washington, DC American Society for Microbiology 01.03.1994
Subjects
09 BIOMASS FUELS
ALCOHOL FUELS
ALCOHOLS
BIOCONVERSION
Biological and medical sciences
Biology
Biotechnology
BLE
CEREALS
COMBUSTIBLE
COMBUSTIBLES
ETANOL
ETHANOL
FERMENTACION
FERMENTATION
FUELS
Fundamental and applied biological sciences. Psychology
GRAMINEAE
HYDROXY COMPOUNDS
LILIOPSIDA
MAGNOLIOPHYTA
Methods. Procedures. Technologies
Microbial engineering. Fermentation and microbial culture technology
ORGANIC COMPOUNDS
Physiology and Biotechnology
PLANTS
PRODUCCION
PRODUCTION
SACCHAROMYCES CEREVISIAE
SYNTHETIC FUELS 090900 > Biomass Fuels > Processing > (1990-)
TEMPERATURA
TEMPERATURE
TEMPERATURE MEASUREMENT
TRIGO
WHEAT
Monocotyledones
Temperature
Ethanol
Environmental factor
Biofuel
Fermentation
Optimization
Urea
Gramineae
Angiospermae
Production
Spermatophyta
Triticum aestivum
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Summary:The time required to end ferment wheat mash decreased as the temperature was increased from 17 to 33 degrees C, but it increased as the concentration of dissolved solids was raised from 14.0 to 36.5 g/100 ml. Ethanol yield was not appreciably affected. Over the range of fermentation temperatures tested, the addition of urea accelerated the rate of fermentation, decreased the time required to complete fermentation at all dissolved-solid concentrations, and stimulated the production of slightly more ethanol than was produced by the corresponding unsupplemented control mashes. The optimum temperature for maximum ethanol production in urea-supplemented very-high-gravity wheat mash was 27 degrees C. These data are important for the industrial assessment of very-high-gravity fermentation technology
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Corresponding author. Mailing address: Department of Applied Microbiology and Food Science, University of Saskatchewan, Saskatoon, Saskatchewan S7N 0W0, Canada. Phone: (306) 966-5028. Fax: (306) 966-8898. Electronic mail address: ingledew@agric.usask.ca.
Present address: Biotechnology Research Institute, National Research Council of Canada, Montreal, Quebec H4P 2R2, Canada.
ISSN:0099-2240
1098-5336
DOI:10.1128/AEM.60.3.1048-1051.1994