Ethanol is commercially produced in by either of those ways, utilization either the wet mill or dry mill process. Wet milling involves separating the grain kernel into its constituents (germ, fiber, protein, and starch) before fermentation. Whereas in dry mill process, the whole grain kernel is ground into flour. The starch in the flour is converted to ethanol during the fermentation method, creating carbon dioxide and distillers’ grain. Fermentation is one among the oldest method known to man. Ethanol is principally produced by dry-grinding method (approximately 67%) and its percentage is increasing speedily.

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