影响甜菜糖蜜生产乙醇的因素

Attia EL-Makhzangy, Abd EL-Gawad EL-Shawaf, Awatif Lotfy Mohamed
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摘要

甜菜糖蜜是制糖工业的重要副产物之一,其颜色为深褐色至黑色,富含多种多糖。因此,它可以用于酿酒酵母生产乙醇。结果表明,2%的接种量为糖蜜培养基的最佳接种量。其中酒精产量为4.6 ml /100培养基,经济系数为53.7%,产率系数为46.1%。此外,潜伏期测试为2至14天。发酵第6天酒精产量最高,为4.71% ml/100ml培养基。经济系数和产量系数分别为53.7%和46.1%;分别。结果表明,在30℃的培养温度下,酿酒酵母生产乙醇的价值较高。4.61 ml /100ml培养基,经济系数为53.7%,产率系数为46.1%。PH值为5时,糖蜜产乙醇的最佳值为4.61%,经济系数和产量系数分别为53.7%和46.1%。当PH值增加到5.5时,乙醇产量并没有增加。但乙醇产量有下降的记录。结果表明,在20℃培养温度和14.0%初始条件下,乙醇产量为5.16%,经济系数为40%;在30℃培养温度下,乙醇产量最高为6.3%,经济系数为49.0%,初始糖含量为14.0%。
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Factors Affecting the Ethanol Production from Sugar Beet Molasses
Sugar beet molasses is one of the important by products in sugar industry, it in dark brown to black colored and rich source of various polysaccharides. So, it can be used in the production of ethanol by Saccharomyces cerevisiae. Data showed that 2% inoculums size was the best size of all tested for molasses media. Where the alcohol production was 4.6 ml /100 media with economic coefficient 53.7% and yield coefficient 46.1%. Also, incubation periods were tested from 2 to 14 days. Maximum alcohol production was noticed at the sixth day of fermentation, it was 4.71% ml/100ml medium. The economic and yield coefficient were 53.7% and 46.1%; respectively. Results showed at 30°C incubation temperature the yeast of Saccharomyces cerevisiae produced high value of ethanol production. 4.61 ml /100ml medium with high value of economic coefficient 53.7% and 46.1% of yield coefficient. While PH 5 was the optimal value for ethanol production from molasses, where alcohol production was 4.61%, economic coefficient and yield coefficient were 53.7% and 46.1%, respectively. Increasing the PH value up to 5.5 did not increase the ethanol production. but ethanol production was recorded decrease value. Data showed that at 20°C incubation temperature and 14.0% initial, sugar the ethanol production was 5.16% with 40% economic coefficient, while at 30°C incubation temperature the maximum ethanol production was 6.3% with economic coefficient 49.0% where the initial sugar was 14.0%.
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