OPTIMASI PRODUKSI BIOETANOL DARI UBI KAYU (manihot utilissima POHL) MENGGUNAKAN 

Aspergillus niger DAN Rhizopus oryzae

ABSTRACT

Cassava is one of the plants containing starch. tarch content of cassava is around 83,8%. tarch of cassava can be used as raw materials of bioethanol for alternative energy. t can also reduce green house effect. The purpose of this research was to get the best type of microorganisms for their capability to optimize the production of bioethanol. This study examined the use of 10% H combined with Aspergillus niger and Rhizopus oryzae. The combination was assumed to increase glucose as the material to produce bioethanol through fermentation process. it was compared the bioethanol production between the combination of H niger, H2O–Rhizopus oryzae and H2O–Aspergillus niger–Rhizopus oryzae. Data was analyzed by one way Anova and followedby Duncan analysis. it was found that highest reducing sugar produced was 1098.3 ppm or 1.1% by Aspergillus niger. The optimum time of yielded ethanol was 7.1% at 72 hours of fermentation.

Key words: Cassava (Manihot utilissima Pohl), bioethanol, Aspergillus niger, Rhizopus oryzae 2O2 O–Aspergillus