Abstract:
Sorghum is one of the agricultural commodities used for biofuels. Sorghum is a resource
of grain yield 55-75% starch composition similar to corn, which is potetianlly as raw material
for production of bioethanol. Research based sorghum bioethanol manufacture carried out using
enzymes stargenTM 002 and starch raw materials. The purpose of this study was to determine the
concentration of substrate and the best time of fermentation to produce bioethanol. The research
method consists of hydrolysis and saccharification processes are aided by enzymes stargenTM
002 followed by a fermentation process using yeast Saccaromyces Cerevisiaee , ferment at room
temperature, pH 4.5, enzymes stargenTM 002 concentration 2,% and distilled at a tempaerature
78 -800C. variable substrate concentration used were 30 g/l; 40 g/l; 50 g/l; and 60 g/l and time
of fermentation were 12; 24; 48 and 72 hours. The result indicate that the substrate
concentration 0f 30 g/l and the optimum time is 48 hours can produce the higest bioethanol
concentration of 6% (v/v).
