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首页> 外文期刊>Global Journal of Applied Agricultural Research >Study on the Utilization of Cull Dates for Bioethanol Fuel Production in Arabic Countries
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Study on the Utilization of Cull Dates for Bioethanol Fuel Production in Arabic Countries

机译：阿拉伯国家利用淘汰期生产生物乙醇燃料的研究

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Bioetanol from inexpensive sugar rich substrates is one of the current sustainable alternative as substitute fossil fuel. Dates processing and packing generate a number of by-products for which valorization processes might be developed in order to improve the economy of the operation as a whole and to decrease the disposal problems and costs. Cull dates contained about 58.6% fermentable sugars. Conditions affect extract sugar from cull dates such as solvent:cull dates ratio, temperature, and time were studied and 95.7 %from the fermentable sugars involved in cull dates were eluted. Ten Saccharomyces servesiae strains were screened to select the more promising strain.5. cerevisiae F-727 gave the highest ethanol yield 9.2% v/v in sugar solution mediumcontained 20 % w/v fermentable sugars. Nutritional demands from macro and micronutrients such as nitrogen, phosphorous, magnesium and zinc supplementation were studied and optimized. Sugar concentration and fermentation along the time were also investigated. The highest bioethanol yield l2.0%v/v was attained by S. cerevisiae F-727when the fermentation was applied using 20 %w/v fermentable sugar solution supplemented with (g/L) ammonium nitrate 1.5, potassium dihydrogen phosphate 0.5, magnesium sulfate0.5and zinc sulfate 0.05 after 36 hrs at 36°C. The fermentation efficiency was 97.2%, residual sugars 0.22%.The fermentation process resulted yeast biomass yield 13.6 g dry yeast / L.
机译：来自廉价的富含糖的底物的生物乙醇是目前可持续的替代矿物燃料之一。枣加工和包装会产生许多副产品，可能需要针对这些副产品开发价格调整过程，以提高整个运营的经济性并减少处置问题和成本。剔枣含有约58.6％的可发酵糖。研究了影响剔除日期的提取糖的条件，例如溶剂：剔除日期的比率，温度和时间，并洗脱了涉及剔除日期的可发酵糖的95.7％。筛选了十株酵母菌，筛选出更有希望的菌株。5。在含20％w / v可发酵糖的糖溶液中，酿酒酵母F-727的乙醇产率最高，为9.2％v / v。研究和优化了补充微量元素（如氮，磷，镁和锌）的营养需求。糖浓度和发酵时间也进行了调查。当使用添加有（g / L）硝酸铵1.5，磷酸二氢钾0.5，镁的20％w / v可发酵糖溶液进行发酵时，酿酒酵母F-727可获得最高的生物乙醇收率12.0％v / v。在36°C下放置36小时后，硫酸盐0.5和硫酸锌0.05。发酵效率为97.2％，残糖为0.22％。发酵过程产生的酵母生物量为干酵母13.6 g / L。

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