Selection of Saccharomyces cerevisiae strains for efficient very high gravity b...

• Author(s): Pereira, Francisco B. ; Guimarães, Pedro M. R. ; Teixeira, J. A. ; Domingues, Lucília
• Date: 2010
• Persistent ID: http://hdl.handle.net/1822/11348
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Bio-ethanol production; Industrial strains; Laboratory strains; Saccharomyces cerevisiae; Very high gravity fermentation
• Document Type: Article
• Language: English

Description

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 industrialscale bio-ethanol fermentations.