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  • Title: Selection of Saccharomyces cerevisiae strains for efficient very high gravity bio-ethanol fermentation processes.
    Author: Pereira FB, Guimarães PM, Teixeira JA, Domingues L.
    Journal: Biotechnol Lett; 2010 Nov; 32(11):1655-61. PubMed ID: 20574836.
    Abstract:
    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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