How ethanol is made

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The mash is cooled and moved to the fermenters where the addition of yeast produces ethanol and carbon dioxide from the sugar. During the forty or fifty hour fermentation process, the mash is agitated and kept cool to help the yeast activation. The mash is then transferred to distillation columns where the ethanol is separated from the remaining mash...
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The mash is then transferred to distillation columns where the ethanol is separated from the remaining mash. Conventional distillation methods produce 190 proof ethanol and then dehydration in a molecular sieve produces 200 proof ethanol. With the addition of five percent gasoline, the ethanol is ready to be shipped to gasoline terminals or retailers...
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