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Related Experiment Videos

Selective ethanol production from reducing sugars in a saccharide mixture.

Satoshi Ohara1, Taku Kato, Yasuhiro Fukushima

  • 1Department of Bioethanol Production Technology, Asahi Group Holdings Ltd., 1-1-21 Midori, Moriya, Ibaraki 302-0106, Japan.

Journal of Bioscience and Bioengineering
|December 26, 2012
PubMed
Summary

Four yeast strains selectively convert sugars to ethanol. Saccharomyces dairenensis and Saccharomyces transvaalensis show superior ethanol production rates and yields, respectively, under sugarcane juice conditions.

Related Experiment Videos

Area of Science:

  • Biotechnology
  • Fermentation Science
  • Yeast Metabolism

Background:

  • Sucrose utilization is crucial for efficient ethanol production in yeasts.
  • Understanding yeast fermentation profiles aids in optimizing biofuel processes.

Purpose of the Study:

  • To evaluate the fermentation performance of four distinct yeast strains with sucrose utilization defects.
  • To identify yeast strains with optimal characteristics for ethanol production from sugarcane juice.

Main Methods:

  • Analysis of fermentation profiles for four yeast strains.
  • Selective sugar conversion assessment in a saccharide mixture.
  • Performance evaluation at the temperature of pressed sugarcane juice.

Main Results:

  • All tested yeast strains demonstrated selective sugar conversion to ethanol.
  • Saccharomyces dairenensis exhibited a higher ethanol production rate.
  • Saccharomyces transvaalensis showed a superior ethanol yield.

Conclusions:

  • Defective sucrose utilization does not preclude ethanol production in these yeast strains.
  • Saccharomyces dairenensis and Saccharomyces transvaalensis are promising candidates for industrial ethanol fermentation from sugarcane.