Document Detail

Whey liquid waste of the dairy industry as raw material for potable alcohol production by kefir granules.
MedLine Citation:
PMID:  12452637     Owner:  NLM     Status:  MEDLINE    
Kefir granular biomass was used in the fermentation of sweet whey and proved to be more effective compared to single-cell biomass of kefir yeast. The operational stability of the biocatalyst was assessed by carrying out 20 repeated batch fermentations. Levels of ethanol productivity reached 2.57 g L(-1) h(-1)), whereas the yield was 0.45 g/g. The fermentation time was only 8 h. Mixtures of sweet whey with molasses were fermented at initial densities ranging from 4.2 to 10.2 degrees Be and resulted in ethanol yield factors between 0.36 and 0.48 g of ethanol/g of utilized sugar. Lower degrees Be values led to an increase of percentages of ethyl acetate on total volatiles determined and a reduction of amyl alcohols. The addition of 1% black raisin extract to whey appears to promote whey fermentation, whereas the same was not observed in the case of white sultana extract addition. It was finally established that it is preferable to ferment mixtures of whey-molasses by adding molasses in whey after the completion of whey fermentation.
I Athanasiadis; D Boskou; M Kanellaki; V Kiosseoglou; A A Koutinas
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  50     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2002 Dec 
Date Detail:
Created Date:  2002-11-27     Completed Date:  2003-01-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  7231-4     Citation Subset:  IM    
Laboratory of Food Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54006 Thessaloniki, Greece.
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MeSH Terms
Ethanol / metabolism*
Industrial Waste
Milk / metabolism*
Milk Proteins
Reg. No./Substance:
0/Industrial Waste; 0/Milk Proteins; 0/whey protein; 64-17-5/Ethanol

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