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Titolo:
FERMENTATION OF VERY HIGH GRAVITY WHEAT MASH PREPARED USING FRESH YEAST AUTOLYSATE
Autore:
JONES AM; INGLEDEW WM;
Indirizzi:
UNIV SASKATCHEWAN,DEPT APPL MICROBIOL & FOOD SCI SASKATOON SK S7N 0W0CANADA
Titolo Testata:
Bioresource technology
fascicolo: 2, volume: 50, anno: 1994,
pagine: 97 - 101
SICI:
0960-8524(1994)50:2<97:FOVHGW>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALCOHOL PRODUCTION; NITROGEN; ETHANOL;
Keywords:
VERY HIGH GRAVITY FERMENTATION; WHEAT MASH; YEAST AUTOLYSATE; FREE AMINO NITROGEN; FUEL ALCOHOL; BACKSET;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
A.M. Jones e W.M. Ingledew, "FERMENTATION OF VERY HIGH GRAVITY WHEAT MASH PREPARED USING FRESH YEAST AUTOLYSATE", Bioresource technology, 50(2), 1994, pp. 97-101

Abstract

The use of autolysed spent yeast cells as a source of extra free amino nitrogen (FAN) resulted in significantly accelerated rates of sugar utilization and ethanol production under very high gravity (VHG) fermentation conditions. These rates were comparable to those obtained in urea-supplemented fermentations. Analysis of thin stillage backset fromgrain-based fuel ethanol plants indicated that backset contains insufficient FAN to produce maximum rates of fermentation under VHG conditions. Use of thin stillage is therefore more important as a method to conserve water usage and pollution costs than as a source of nutrients. Our results suggest that a yeast autolysate prepared from harvested spent yeast or waste yeast slurry acquired from a brewery and used in conjunction with backset may be a feasible alternative to improve industrial process economy in normal gravity and in VHG fuel alcohol fermentations.

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Documento generato il 14/07/20 alle ore 19:30:46