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- Title
Comparison of industrial yeast strains for fermentation of spent sulphite pulping liquor fortified with wood hydrolysate.
- Authors
Smith, M T; Cameron, D R; Duff, S J B
- Abstract
Ethanol production from spent sulphite pulping liquor (SSL) was compared for four different yeasts. A second strain of S. cerevisiae as well as a 2-deoxyglucose-resistant strain formed through protoplast fusions between S. uvarum and S. diastaticus produced up to 27% more ethanol from SSL fortified with hydrolysis sugars than was produced by S. cerevisiae. The incremental improvement in ethanol yield appeared to vary with the degree of fortification, ranging from 5.8% for unfortified SSL, to 27% for the highest level of fortification tested. Decreasing fermentation rates were observed for SSL fortified with glucose, mannose and galactose, respectively. Sugar uptake rates in SSL fortified with glucose, galactose and mannose were 6.8, 2.8 and 2.0 g L[SUP-1] h[SUP-1], respectively. However, when these sugars were fermented along with a glucose cosubstrate, the rate at which the combined glucose/mannose medium was fermented was nearly identical to that of the glucose control.
- Subjects
SULFITE waste liquor; HYDROLYSIS
- Publication
Journal of Industrial Microbiology & Biotechnology, 1997, Vol 18, Issue 1, p18
- ISSN
1367-5435
- Publication type
Article
- DOI
10.1038/sj.jim.2900338