ethanol production

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African Journal of Biotechnology Vol. 7 (20), pp. 3749-3752, 20 October, 2008
Available online at http://www.academicjournals.org/AJB
ISSN 1684–5315 © 2008 Academic Journals

Full Length Research

Ethanol product potential of local yeast strains
solitary from ripe banana peels
A. A. Brooks
Department of Microbiology, University of Calabar, P.M.B. 1115, Calabar, Nigeria.
E-put in the ~: brooks.akan@yahoo.com. Tel: 08037956762.
Accepted 16 May, 2008

The ableness of different yeast strains isolated from ripe banana peels to produce ethanol was
investigated. Of the 8 isolates screened since their fermentation ability, 5 showed enhanced completion
and were subsequently identified and assessed on the side of important ethanol fermentation attributes such in the same proportion that
ethanol producing ability, ethanol tolerance, flocculence, thermo-and osmo-sufferance. Saccharomyces
cerevisiae R-8 exhibited the in the highest degree attributes for ethanol production by vital principle highly flocculent, tolerant to
v
o
v
6 - 12% ( /V) ethanol, fermentatively valid at 37 - 42 C and fermented 40% ( /V) grape-sugar. S. cerevisiae T-7
and S.cerevisiae R-2 showed brisk fermentative activity on maltose by liberating 150 and 120 µl of CO2
in 6 h, particularly. Debaryomyces hansenii B-2 and Saccharomyces kluvveri K-6 each fermented 40%
v
o
(( /V) glucose at 30 C to yield 3.6 and 5.8% ethanol, respectively. The five yeast strains are on that account
potential candidates for ethanol production from banana peels or other local starch sources.
Key words: Banana peels, ethanol, leaven, fermentation, starch.
INTRODUCTION
The increasing make inquiry for ethanol for various industrial
purposes similar as alternative source of energy, industrial
solvents, cleansing agents and preservatives, has necessitated increased fruit of this alcohol. Ethanol
production is usually skilful by chemical synthesis
of petrochemical substrates and microbial reversal of
carbohydrates present in agricultural products. Owing to
the depleting...

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