Fermentation of Cassava Skin as Additional Octan Value of Fuel

The lack of fossil energy sources requires us to look for alternative energy sources. This study uses cassava peel as a renewable energy source. The experimental method of the fermentation process shows that the smaller the density produced, the greater the percentage of ethanol content. Bioethanol from cassava peel initially still contains water, and the fermentation process improves the quality of the fuel mix. The highest percentage of alcohol occurred on the fourth day of fermentation, which was 60%, each variation of ethanol can be seen as the highest ethanol content with fermentation time. Gasoline has a low octane rating and will produce pollutants such as CO, CO2, SO2, NOx, and Pb. These chemicals can be reduced by increasing the octane rating using ethanol. Fermented cassava peel may be an alternative to bioethanol.