What is Bioethanol?

Bioethanol is mainly produced by fermentation of starch (corn), sugar (sugar beet, sugar cane) or cellulose plants. Besides the sugar fermentation process it can also be produced by the hydrolysis of biomass (cellulose, lignin). The produced alcohol still contains significant amounts of water, that has to be removed. Therefore, in a subsequent distillation process the lower boiling alcohol is separated from the water.