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Titolo:
PRODUCTION OF FUEL ETHANOL FROM RYE AND TRITICALE BY VERY-HIGH-GRAVITY (VHG) FERMENTATION
Autore:
WANG S; THOMAS KC; INGLEDEW WM; SOSULSKI K; SOSULSKI FW;
Indirizzi:
UNIV SASKATCHEWAN,DEPT APPL MICROBIOL & FOOD SCI SASKATOON SK S7N 5A8CANADA UNIV SASKATCHEWAN,DEPT APPL MICROBIOL & FOOD SCI SASKATOON SK S7N 5A8CANADA UNIV SASKATCHEWAN,DEPT CROP SCI & PLANT ECOL SASKATOON SK S7N 5A8 CANADA SASKATCHEWAN RES COUNCIL SASKATOON SK S7N 2X8 CANADA
Titolo Testata:
Applied biochemistry and biotechnology
fascicolo: 3, volume: 69, anno: 1998,
pagine: 157 - 175
SICI:
0273-2289(1998)69:3<157:POFEFR>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
HULL-LESS BARLEY; ALCOHOL PRODUCTION; WHEAT MASHES; TEMPERATURE; TECHNOLOGY; VISCOSITY; NITROGEN;
Keywords:
RYE; TRITICALE; FUEL ALCOHOL; VERY-HIGH-GRAVITY FERMENTATION TECHNOLOGY; VHG; UREA; STILLAGE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
S. Wang et al., "PRODUCTION OF FUEL ETHANOL FROM RYE AND TRITICALE BY VERY-HIGH-GRAVITY (VHG) FERMENTATION", Applied biochemistry and biotechnology, 69(3), 1998, pp. 157-175

Abstract

Very-high-gravity (VHG) rye and triticale mashes, containing about 28.5 g dissolved solids/100 mt of mash supernatant, were prepared by adjusting water:grain ratios to 2:1. Because of high viscosity, which develops during mashing, it was necessary to pretreat ground rye-water slurries with viscosity-reducing enzymes. There were no viscosity problems during the preparation of triticale mashes. Fermentations were conducted at 20 degrees C, with and without 16 mM urea as a nitrogenous supplement. All fermentations were completed within 120-144 h. Supplementation with urea shortened the times required for completion of fermentation by 33% for triticale and by 40% for rye. The fermentation efficiencies for both grains ranged between 90 and 93%. These values are comparable to those reported for wheat, implying competitiveness of rye and triticale as fermentation feedstocks to replace wheat. The final ethanol yields were 409 L for rye and 417-435 L for triticale/t (dry basis). For a given size of fermentation vessel, 33% more grain was usedin the VHG fermentation process than in normal gravity fermentation. This resulted in a 35-56% increase in ethanol concentration in the beer, when fermenters were filled to a constant volume. The correspondingreduction in water use by about one-third would result in savings in energy consumption in mash heating, mash cooling, and ethanol distillation. Fermentation efficiencies and final ethanol yields obtained per unit weight of grain fermented were not significantly different from the normal gravity fermentations.

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Documento generato il 09/07/20 alle ore 14:08:33