Abstract
The yield of conversion of absolute ethanol (A% by weight) from four varieties of cassava roots namely: NR 8082 – Type I, TMS 92/00057- Type II, NR 87184 – Type III and TMS 30572 – Type IV- were determined using two fungi (Aspergillus niger and Rhizopus oryzae) and synthetic diastase as sources of hydrolytic enzymes. Results showed that Type II cassava produced significantly (p<0.05) the highest ethanol percentage by weight (Alc 9.5% by wt) and a best yield of 46%. Sample A2 combination of enzyme treatment of Type II with Aspergillus niger, had significantly the highest (p<0.05) ethanol percentage by weight followed by A3, A1,D2/R2, D4, R3, D1, A4 and R4 as the least. Aspergillus niger had the high yield of total percentage of conversion (62%) of cassava to ethanol concentration, 22% and 16% respectively for diastase and Rhizopus oryzae.
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