Influence of cultivation procedure for Saccharomyces cerevisiae used as pitching agent in industrial spent sulphite liquor fermentations
Artikel i vetenskaplig tidskrift, 2011

The cell viability and fermentation performance often deteriorate in fermentations of spent sulphite liquor (SSL). This investigation therefore addresses the question of how different cultivation conditions for yeast cells influence their ability to survive and boost the ethanol production capacity in an SSL-based fermentation process. The strains used as pitching agents were an industrially harvested Saccharomyces cerevisiae and commercial dry baker's yeast. This study therefore suggests that exposure to SSL in combination with nutrients, prior to the fermentation step, is crucial for the performance of the yeast. Supplying 0.5 g/l fresh yeast cultivated under appropriate cultivation conditions may increase ethanol concentration more than 200%.

Microbial infections

Ethanol

Spent sulphite liquor

Pitching

Yeast

Författare

Emma Johansson

Chalmers, Kemi- och bioteknik

Tomas Brandberg

Svensk Etanolkemi AB

Christer Larsson

Chalmers, Kemi- och bioteknik, Industriell Bioteknik

Journal of Industrial Microbiology and Biotechnology

1367-5435 (ISSN) 1476-5535 (eISSN)

Vol. 38 11 1787-1792

Drivkrafter

Hållbar utveckling

Ämneskategorier

Industriell bioteknik

Biokemi och molekylärbiologi

Styrkeområden

Energi

Livsvetenskaper och teknik

Fundament

Grundläggande vetenskaper

DOI

10.1007/s10295-011-0965-0