Abstract:
Energy is of particular concern because of the increasingly limited availability so encouraged to find alternative energy. Which has great potential in the new and renewable energy sources are palm sap. Availability of land large enough palm in Indonesia as well as a fairly high sugar content (15-20%) making palm sap is a potential to be processed into bioethanol. Through the process of fermentation using yeast Saccharomices cerevisiae, glucose is converted into ethanol. Fermentation takes place in batches with a volume of 150 ml fermentation medium and the volume of 15% with a variation starter fermentation time 12, 24, 36, 48, 60, 72, 84 and 96 hours and viscosity variations palm sap fifth evaporation, 2/5 evaporation and 3/5 of evaporation. Initial fermentation medium acidity at pH 5 and a temperature of fermentation at room temperature. Ethanol concentration was analyzed by using alkoholmeter. The fermentation process is shown in optimum viscosity 3/5 evaporation and fermentation time of 48 hours with ethanol concentration obtained was 94.716 mg / ml.
