Selection of Saccharomyces cerevisiae strains for efficient very high gravity bio-ethanol fermentation processes.
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.
Pereira
Francisco B
FB
IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
Guimarães
Pedro M R
PM
Teixeira
José A
JA
Domingues
Lucília
L
D003470:Culture Media / Q000737:chemistry; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D005947:Glucose / Q000378:metabolism; D018471:Hypergravity; D012441:Saccharomyces cerevisiae / Q000302:isolation & purification* / Q000378:metabolism*
D003470:Culture Media; D000431:Ethanol; D005947:Glucose