Effect of Various Parameters on the Growth and Ethanol Production by Yeasts Isolated from Natural Sources

Authors

  • Shafkat Shamim Rahman Biotechnology and Microbiology programs, Department of MNS, BRAC University, Mohakhali, Dhaka-1212
  • Md Mahboob Hossain Biotechnology and Microbiology programs, Department of MNS, BRAC University, Mohakhali, Dhaka-1212
  • Naiyyum Choudhury Biotechnology and Microbiology programs, Department of MNS, BRAC University, Mohakhali, Dhaka-1212

DOI:

https://doi.org/10.3329/bjm.v30i1-2.28453

Keywords:

Ethanol, yeast, biofuel, Saccharomyces cerevisiea

Abstract

Two ethanol fermenting Saccharomyces cerevisiae were isolated from date juice and grapes and grown in YEPD medium. They were characterized for alcoholic fermentation using sugarcane molasses and their growth conditions were optimized with respect to pH and sugar concentration. Results revealed a temperature of 30ºC, pH 6.0 and 6.5% sugar concentration as optimum for fermentation. Stress tolerance tests showed that date juice isolate was highly tolerant to temperature, pH and high ethanol concentration in the medium. Under optimized conditions, S. cerevisiae isolated from date-juice produced 7.75% of ethanol in molasses as estimated by Conway method.

Bangladesh J Microbiol, Volume 30, Number 1-2,June-Dec 2013, pp 49-54

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Author Biography

Shafkat Shamim Rahman, Biotechnology and Microbiology programs, Department of MNS, BRAC University, Mohakhali, Dhaka-1212



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Published

2016-06-25

How to Cite

Rahman, S. S., Hossain, M. M., & Choudhury, N. (2016). Effect of Various Parameters on the Growth and Ethanol Production by Yeasts Isolated from Natural Sources. Bangladesh Journal of Microbiology, 30(1-2), 49–54. https://doi.org/10.3329/bjm.v30i1-2.28453

Issue

Vol. 30 No. 1-2 (2013)

Section

Articles