Bio-Ethanol Production from Waste of Sago Starch by Saccharomyces cerevisiae

Abstract

The sago (Metroxylon sagu) is a local plant found in the southern region. It is used to produce sago
starch. Sago starch factories produce a large amount of waste from the production process. Most of them are cellulosic fibers and hemicellulose residue. It can be used in yeast-based fermentation to produce bioethanol. Thus this study has aimed to recycle wastes from the production of sago starch as raw material for the production of bioethanol using Saccharomyces cerevisiae. By using the concentration of Saccharomyces cerevisiae at 1×108 CFU/mL combine with the different ratio of Sago waste, including, 1) 100 % of wastewater 2) 50 % of wastewater 3) 50 % of Sago starch waste mixed with 50 % of wastewater and 4) 25 % of Sago starch waste mixed with 75 % of wastewater. The results found that the maximum bioethanol was produced at 12 hours in all experiments and the highest bioethanol (2.9 %) was obtained from 50 % of Sago starch waste mixed with 50 % of wastewater.