Enhanced ethanol production in multiple batch fermentations with an auto-flocculating yeast strain

Hawgood N., Evans S. and Greenfield P.F. (1985) Enhanced ethanol production in multiple batch fermentations with an auto-flocculating yeast strain. Biomass, 7 4: 261-278. doi:10.1016/0144-4565(85)90065-4


Author Hawgood N.
Evans S.
Greenfield P.F.
Title Enhanced ethanol production in multiple batch fermentations with an auto-flocculating yeast strain
Journal name Biomass
ISSN 0144-4565
Publication date 1985-01-01
Sub-type Article (original research)
DOI 10.1016/0144-4565(85)90065-4
Open Access Status Not yet assessed
Volume 7
Issue 4
Start page 261
End page 278
Total pages 18
Subject 2200 Engineering
Abstract An auto-flocculating strain of S. cerevisiae was used to carry out multiple batch fermentations at high cell concentrations to produce ethanol using glucose, sucrose or sugar cane juice as carbon source. Typical improvements in average volumetric ethanol productivity of 4-6 fold were achieved over conventional batch fermentation. A gradual decline in specific ethanol productivity was observed as the cycle number increased, dictating the maximum cell residence time in the system. Because of the low capital expenditures involved, the approach is promising as a means of upgrading existing distilleries. The effects of providing external agitation and of maintaining a low dissolved oxygen concentration on the fermentative ability of the auto-flocculating yeast were also measured. Increased levels of agitation were found to improve ethanol productivity by maintaining flocs of smaller mean size. As expected, the presence of a low dissolved oxygen concentration led to higher specific and volumetric ethanol productivities at the expense of slightly lower product yields.
Keyword aeration
agitation
Auto-flocculating yeast
cell viability
ethanol fermentation
mixing
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 23 Aug 2016, 10:47:27 EST by System User