Int. J. Renewable Energy & Environmental Engineering
ISSN 2319-5347, ISI Impact Factor: 0.763
VOLUME 02 NO. 01 JANUARY 2014:
Title: The Effect Temperature on the Growth Characteristics of
Ethanol Producing Yeast Strains
Authors: Dac Hai Nam
Ho, Chris Powel
Abstract: For commercial corn mash to
ethanol production it is known that increasing
temperature can maximize ethanol yield, although care
must be taken to avoid causing heat shock resulting in
the death of the yeast culture. Despite the potentially
negative effects of high temperature, short sub-lethal
stress has been reported to procure a benefit to yeast
cells. However, the effect of such yeast pre-treatment
on bioethanol fermentations has not previously been
investigated. In order to understand more about the
effects of the temperature on yeast prior corn mash
fermentation, the growth characteristic of four
industrial ethanologenic yeast strains to heat stress
was determined. The spot plate method and analysis of
yeast growth in liquid medium were used in this study.
Our obtained results offer an optimal condition for the
use of yeast cells in preconditioning before the
fermentation of corn mash or other materials to
bioethanol.
Keywords: bioethanol, corn mash, fermentation,
Saccharomyces cerevisiae, temperature effect, heat shock
Pages:
1-6