with a temperature of 370C was 0.37 g biomass/g substrate. Where as ethanol and biomass yields reported in a study conducted by Ozmihci and Kargi [15] at a temperature of 26oC was 0.16 g biomass/ g substrate and 0.54 g ethanol/ g substrate. In the study conducted by Ozmihci and Kargi [15], the ethanol yield greater than this study. It is due to the different types of microorganisms that are used, the operating conditions and nutrient use between this research with the research conducted by Lukondeh et al. [9]; Ozmihci and Kargi [15].