Bioethanol is a form of renewable energy that can be produced from agricultural feedstock, i.e. sugar
cane, potato, corn, and cellulose-content materials. Whichever substrate is chosen, the attention must be
paid to the overall economics and energy consumption [1]. Efficient ethanol production requires a rapid
fermentation to get high ethanol concentrations; therefore a yeast strain must have a good specific growth
rate and good specific ethanol production rate at high ethanol concentration [2]. Fermentation step play a
big role in ethanol production since many parameters can cause the decrease of specific rate of yeast
growth, especially the inhibition caused by product or substrate concentration. Therefore, the interest in
yeast cell immobilization for ethanol production has increased in the last decades due to several
advantages presenting by the using of cell immobilization, such as increased productivity, reduced risk of
contamination, biocatalyst recycling, rapid product separation and others [3]. The aim of the cell
immobilization is to retain high cell densities inside the reactor.