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Sosulski Krystyna Wang Sunmin Ingledew W. M. Sosulski Frank W. Tang Juming 《Applied biochemistry and biotechnology》1997,(1):59-70
Rye, triticale, and barley were evaluated as starch feedstock to replace wheat for ethanol production. Preprocessing of grain
by abrasion on a Satake mill reduced fiber and increased starch concentrations in feedstock for fermentations. Higher concentrations
of starch in flours from preprocessed cereal grains would increase plant throughput by 8–23% since more starch is processed
in the same weight of feedstock. Increased concentrations of starch for fermentation resulted in higher concentrations of
ethanol in beer. Energy requirements to produce one L of ethanol from preprocessed grains were reduced, the natural gas by
3.5–11.4%, whereas power consumption was reduced by 5.2–15.6%. 相似文献
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Production of fuel ethanol from rye and triticale by very-high-gravity (VHG) fermentation 总被引:1,自引:0,他引:1
S. Wang K. C. Thomas W. M. Ingledew K. Sosulski F. W. Sosulski 《Applied biochemistry and biotechnology》1998,69(3):157-175
Very-high-gravity (VHG) rye and triticale mashes, containing about 28.5 g dissolved solids/100 mL 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°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 used in the VHG fermentation process than in normal gravity fermentation. This resulted in a 35–56%
increase in ethanol concentration in the beer, when fermentors were filled to a constant volume. The corresponding reduction
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. 相似文献
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Applied Biochemistry and Biotechnology - Canadian Prairie Spring and Soft White Spring wheats, which contained high levels of starch, gave higher concentrations of ethanol after fermentation than... 相似文献
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