Journal
BIOTECHNOLOGY LETTERS
Volume 32, Issue 11, Pages 1655-1661Publisher
SPRINGER
DOI: 10.1007/s10529-010-0330-9
Keywords
Bio-ethanol production; Industrial strains; Laboratory strains; Saccharomyces cerevisiae; Very high gravity fermentation
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Funding
- Fundacao para a Ciencia e a Tecnologia (FCT), Portugal [PTDC/BIO/66151/2006, SFRH/BD/64776/2009, SFRH/BPD/44328/2008]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/64776/2009, SFRH/BPD/44328/2008, PTDC/BIO/66151/2006] Funding Source: FCT
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An optimized very high gravity (VHG) glucose medium supplemented with low cost nutrient sources was used to evaluate bio-ethanol production by 11 Saccharomyces cerevisiae strains. The industrial strains PE-2 and CA1185 exhibited the best overall fermentation performance, producing an ethanol titre of 19.2% (v/v) corresponding to a batch productivity of 2.5 g l(-1) h(-1), while the best laboratory strain (CEN.PK 113-7D) produced 17.5% (v/v) ethanol with a productivity of 1.7 g l(-1) h(-1). The results presented here emphasize the biodiversity found within S. cerevisiae species and that naturally adapted strains, such as PE-2 and CA1185, are likely to play a key role in facilitating the transition from laboratory technological breakthroughs to industrial-scale bio-ethanol fermentations.
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