2019 : Utilization of Stalks Waste of Sorghum bicolor (L.) Moench to Produce Bioethanol by using Saccharomyces cerevisiae and S. cerevisiae-Pichia stipitis Consortium

Dr.Ir. Ellina S Pandebesie MT.
Susi Agustina Wilujeng S.T.,M.T
I D A A Warmadewanthi ST, MT, Ph.D


Abstract

Sweet Sorghum (Sorghum bicolor (L.) Moench) stalks as lignocellulosic agricultural biomass residues are one of the agricultural wastes that do not have economic value and are abundant enough in Indonesia. Compared to sugar cane, total sugar in the sorghum stalk had almost same juice yield. On the basis of the sufficient total sugar content in the sorghum crop residues, sorghum stalk is one of the promising potential sources for bioethanol production. This study was conducted to determine the optimum substrate concentration and microorganism capability to fermentation sorghum stalks using Separated Hydrolysis and Fermentation (SHF) method. The pretreatment conducted in this study was carried out using physical and chemical methods. The sorghum stalks were treated with chopping, drying, grinding and separate with the concentration of 25 grams (5%) and 50 grams (10%), then 0.25% H2SO4 was …