Abstract
Cocoa fruit skin is one of the agricultural wastes can be used as raw material for bioethanol production. Because the cocoa fruit waste containing 39.45% crude fiber and 3.92% glucose. The purpose of this study was to determine the level of optimization of yeast and fermentation time to produce maximum ethanol content. In this study the hydrolysis process cocoa leather is done using fungi Trichoderma viride and fermentation process using yeast Saccharomyses cerevisiae. While for bioethanol concentration measurements performed using vinometer. The results showed that bioethanol fermentation time for 1, 3, 5 and 7 days using yeast levels 2, 4, 6 and 8 grams produce maximum ethanol fermentation at 3 days and 6 grams yeast levels. Produced a maximum ethanol content of 12%.
Highlights
At present, the community's need for fuel use is increasing
Cocoa fruit skin is one of the agricultural wastes can be used as raw material for bioethanol production
The purpose of this study was to determine the level of optimization of yeast and fermentation time to produce maximum ethanol content
Summary
The community's need for fuel use is increasing. The increase in the number of people's needs for this fuel is not followed by the increase in petroleum reserves available today, so that it will cause fuel scarcity and increase the fuel cost. The use of gasoline which is one example of fuel oil can have a negative impact, such as air pollution by producing exhaust gases carbon monoxide which can damage health. When compared with the use of bioethanol, the result of environmentally friendly waste, where bietanol contains 35% oxygen, so that it can streamline combustion and reduce greenhouse gas emissions, bioethanol is decomposed and safe because it does not pollute the water .1. When compared with the use of bioethanol, the result of environmentally friendly waste, where bietanol contains 35% oxygen, so that it can streamline combustion and reduce greenhouse gas emissions, bioethanol is decomposed and safe because it does not pollute the water .1 According to Iris Mustika Sari et al, 2008: 26 "Biethanol can be made from raw materials in the form of sugar cane, tapioca, sorghum, wheat, rice and lignocellulosic materials such as wood and agricultural waste".2
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