Fermentation-During fermentation, glucose and other sugars are converted into ethanol and carbon dioxide. C6H12O6 → 2C2H5OH+2CO2 + heat In ethanol fermentation some other products also produced. They are mostly removed during ethanol purification. Fermentation takes place in an aqueous solution. The resulting solution has an ethanol content of around 15%. Ethanol is subsequently isolated and purified by a combination of adsorption and distillation. .Ethanol may also be produced industrially from ethylene by hydration of the double bond in the presence of catalysts and high temperature. CH2=CH2+H2O → C2H5OH