Abstract
.Ethanol is a biofuel type, with the chemical formula is C2H5OH how to produce ethanol has 2 methods, synthetic and fermentation method.Ethanol production by microorganisms depends on several factors, such as the type of yeast infections, the concentration of the reactant temperature pH And the time of fermentation. Ethanol production from sugar by using fermentation method by yeast infections Lachancea.It was found that the optimal concentration of sugar is from 110 g / L, temperature 30 C P H 5.4 and fermented 20 hour maximum amount of ethanol 46.83 grams per liter. The fermentation of sugar added additional nitrogen source does not help in alcohol production increase. While the study on wine production from sugar from found. Optimization using yeast Saccharomyces cereviesiae 0.2% sugar from start 22 cream Brix pH 4.5 fermentation for ethanol 6 days. 8.92 mm per 100 ml
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