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甜高梁秆固态发酵制取酒精的研究 总被引:1,自引:0,他引:1
甜高粱秆液态发酵中,存在着榨汁难,糖分损失严重等问题。采用固态发酵的方式,进行了甜高粱发酵酒精的研究,确定了发酵过程中发酵时间、接种率、初始pH、营养盐等因素的优化方案。将总糖含量为13%,含水量约80%的甜高粱秆直接绞碎至约0.3cm长,在最佳优化条件下35℃固态发酵24h,酒精的理论产率为0.332g乙醇/g甜高粱秆干料,实际得率为0.298g乙醇/g甜高粱秆干料(达到理论产率的89.8%),生产It酒精需要3.01t的甜高粱秆干料。 相似文献
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甜高粱茎秆汁液酒精发酵及其经济可行性研究 总被引:12,自引:2,他引:10
研究了(NH4)SO4,KH2PO4和MgSO4对甜高粱茎秆汁液酒精发酵的影响,并对甜高粱茎秆汁液酒精发酵的经济可行性进行了分析。结果表明,(NH4)2SO4和KH2PO4的添加有利于提高甜高粱汁酒精发酵的产量和产率,MgSO4的添加无益于酒精产量的提高;在(NH4)2SO4和KH2PO4的用量分别为2g/L和5g/L时,终酒精浓度为94.5g/L,酒精产率为0.44。经济性分析表明,甜高粱茎秆汁液酒精发酵生产酒精可以获得很好的经济效益。 相似文献
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利用选育的耐酸耐高温酵母Q-10,采用甜高粱秸秆固态发酵生产燃料乙醇.当接种量为5%,发酵温度34℃,发酵起始pH4.0,糖化酶和纤维素酶用量分别为50U/g原料和20U/g原料,发酵周期4d时,乙醇体积分数达到6.5%.小试试验乙醇体积分数达到6.4%.工业试验乙醇体积分数达到6.0%. 相似文献
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Frank Driehuis Piet G van Wikselaar 《Journal of the science of food and agriculture》2000,80(6):711-718
Ethanol is a common, usually minor fermentation product in ensiled forages, the major product being lactic acid. Occasionally, high levels of ethanol are found in silages. The aim of this study was to determine the incidence of high‐dry‐matter (DM) grass silages containing ethanol as the main fermentation product (ethanol silages), to describe the fermentation process in such silages and to determine the effect of grass maceration prior to wilting and addition of a bacterial inoculant containing Lactobacillus plantarum and Enterococcus faecium strains on fermentation. Twenty‐one laboratory silages produced between 1993 and 1995, 21 farm silages produced between 1980 and 1989 and 36 farm silages produced in 1995 (all produced without additive) were examined for pH and chemical composition. Dry matter (DM) loss during ensilage was determined for the laboratory silages only. Four laboratory silages were identified as ethanol silages. Mean concentrations of ethanol, lactic acid and acetic acid were 48.1, 15.5 and 6.0 g kg−1 DM respectively. In the silages that contained lactic acid as the main fermentation product (lactic acid silages) these values were 7.7, 45.5 and 15.1 g kg−1 DM. Mean DM loss and pH were 62.8 g kg−1 DM and 5.32 respectively for ethanol silages and 24.4 g kg−1 DM and 4.69 for lactic acid silages. There was no difference between ethanol silages and lactic acid silages in the mean concentration of ammonia‐N (94 g kg−1 total N), and butyric acid was not detected (<0.2 g kg−1 DM), indicating that both types of silages were well preserved. Analysis of the composition of the grass at ensiling showed a positive correlation between the concentration of soluble carbohydrates and the development into ethanol silage. Analysis of the farm silages indicated that 29% of the silages produced between 1980 and 1989 and 14% of those produced in 1995 were ethanol silages. Maceration prior to wilting and addition of silage inoculant improved lactic acid fermentation and prevented high ethanol levels. The micro‐organisms responsible for ethanol fermentation as well as the implications of feeding ethanol silages to livestock remain to be resolved. © 2000 Society of Chemical Industry 相似文献
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灵芝的药用及食用研究 总被引:25,自引:0,他引:25
灵芝是我国传统的中药,在我国民间广泛作为药品和食品。本文分析了灵芝生物活性成分的研究及其在药品和食品方面的应用,并且对其药理作了较多的分析。 相似文献
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利用酒精试验对羊乳的酒精稳定性进行了研究,研究结果表明:在pH6.4~7.2时,羊乳酒精稳定性随羊乳pH的升高而增强,羊乳(pH=6.70)中添加44%浓度的等量酒精出现絮状沉淀物,而牛乳通常是添加70%浓度的酒精出珑沉淀;在30~80℃时,羊乳酒精稳定性随着温度的升高而降低;羊乳酒精稳定性随着羊乳中游离Ca2+浓度增大而降低. 相似文献
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《Journal of the Institute of Brewing》1985,91(3):151-153
Two methods for the determination of ethanol in beverages low in alcohol have been assessed by the Analysis committee and are recommended for use. 相似文献