摘要：AbstractThe development of alternative energy fuel technology at present many are produced from biological resources, eg the manufacture of biodiesel and biodiesel as a fuel substitute for gasoline. This study aims to obtain biogas from chocolate rind that can be used as an alternative energy and find operating conditions that produce appropriate levels of CH4 in the standard Indonesian. The first stage is done by preparing 1 liter of raw materials chocolate rind and water are then mixed with a starter (cow dung) 10% of the volume of raw materials and the addition of yeast and grass after it is mixed until blended. Then put into containers/bottles that have been fitted hose, water manometer, and the gas holder. The research was done in stages with the conditions that you run. Variables that run is a comparison of raw material (1:1; 1:1.5; 1:2; 1.5:1; 2:1), observation time (5 days, 10 days, 15 days, 20 days, 25 days, 30 days), and the variable addition of grass (50 gr, 100 gr, 150 gr, 200 gr). From the results of this reasearch found the greatest level of 74.22% in comparison 1 (water): 1.5 (chocolate rind) with the addition of 150g of grass while low levels of 60.04% in comparison 2 (water): 1 (chocolate rind) with the addition of 200g of grass.
