Traditional ethanol fermentation is using freely suspended yeast cells in batch bioreactor. The bioreactor is filled with unfermented medium and the whole reactor volume is gradually fermented and subsequently removed from the reactor. In terms of the cost effectiveness of the process the volume of the bioreactor, time required for filling and emptying will decrease the volumetric productivity of bioethanol. However, immobilized bioreactor has a continuous flow of carbohydrate medium into the fermentor resulting in smal- ler bioreactor volume no need for filling and emptying operations. Continuous fermentation has advantages like higher conversion rates, improved product consistency and reduced product losses. Immobilized yeast has been used in batch or continuous fermentation. Advantages of the immobilized yeast cells over suspended cells includes protection against pH and toxic compounds, high cell load- ing density, easy cell separation process, reusability and lower sus- ceptibility to contamination by other microorganisms [12].