Document Detail

Continuous whey fermentation using kefir yeast immobilized on delignified cellulosic material.
MedLine Citation:
PMID:  11958619     Owner:  NLM     Status:  MEDLINE    
Delignified cellulosic-supported biocatalyst, prepared by immobilization of kefir yeast on delignified cellulosic material (DCM), was found to be suitable for continuous, modified whey fermentation. The modified whey contained 1% raisin extract and molasses. Ethanol productivities ranged from 3.6 to 8.3 g L(-1)day(-1), whereas parameters such as ethanol concentration, residual sugars, and daily fermented whey productivity were acceptable for the production of potable alcohol and alcoholic drinks in industrial fermentations. The continuous fermentation bioreactor was operated for 39 days, stored for 18 days at 4 degrees C, and operated again for another 15 days without any diminution of the ethanol productivity. The concentrations of higher alcohols (propanol-1, isobutyl alcohol, and amyl alcohols) were low. The main volatile byproducts formed in the continuous process were similar to those observed in alcoholic beverages, and the fermented whey had a good aroma. The concentrations of higher alcohols were very low when compared to that of ethyl acetate, therefore resulting in a quality product. The possibility of using such a process for the production of potable alcohol or a novel, low-alcohol content drink is proposed.
Y Kourkoutas; C Psarianos; A A Koutinas; M Kanellaki; I M Banat; R Marchant
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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 Apr 
Date Detail:
Created Date:  2002-04-17     Completed Date:  2002-05-23     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:  2543-7     Citation Subset:  IM    
Food Biotechnology Group, Department of Chemistry, Section of Analytical, Environmental and Applied Chemistry, University of Patras, GR-26500 Patras, Greece.
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MeSH Terms
Ethanol / metabolism
Milk / microbiology*
Milk Proteins / metabolism*
Yeasts / metabolism*
Reg. No./Substance:
0/Milk Proteins; 0/whey protein; 64-17-5/Ethanol; 9004-34-6/Cellulose

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