Comparative Study of Bioethanol Production and Reducing Sugar Yields from Cassava Peels Using FungiJournal: Acta Microbiologica Bulgarica (Vol.36, No. 4)
Publication Date: 2020-12-01
Authors : Afolabi F. T. Ayodele E. O.;
Page : 153-162
Keywords : methanol; acid hydrolysis; reducing sugar; fermentation; ethanol; palm wine;
This study compared the yields of bioethanol from the fermentation of pretreated cassava peels using yeasts isolated from palm wine, and a pretreatment method with methanol + acid before solid-state fermen¬tation of cassava peels using Trichoderma reesei for 5 days optimally yielded 1.78 g/mL of reducing sugar. The hydrolysate was fermented for bioethanol production using Saccharomyces cerevisiae and Candida tropicalis. S. cerevisiae performed optimally at 30oC, pH 4.5, and produced ethanol with a concentration of about 40.72 g/L, while C. tropicalis produced 29.90 g/L of ethanol concentration at 35oC, and pH 5. Both yeast isolates took the same fermentation time of 96 h. In conclusion, cassava peels are agricultural waste that is a degradable material suitable to produce simple reducing sugars, which can be fermented by yeast to produce bioethanol. The yield of ethanol was higher for S. cerevisiae than C. tropicalis.
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