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1 Journal of Ecological Engineering

1 2024

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Bioethanol Fermentation from Banana Pseudostems Waste (Musa balbisiana) Pretreated with Potassium Hydroxide Microwave

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Uljanah D. , Melwita E. , Novia N.

Journal of Ecological Engineering

2024

tom Vol. 25, nr 9

1--13

Several nations are committed to developing an alternative energy source to achieve the net zero emissions (NZE) target. A typical alternative is bioethanol, which has been reported to be a renewable energy supporting the achievement of the target. Although banana pseudostem waste is often minimally utilized and discarded by the community, several studies have shown its potential to yield bioethanol due to the high cellulose content. Therefore, this study aimed to synthesize bioethanol from banana pseudostem waste (Musa balbisiana) pretreated with potassium hydroxide (KOH) microwave using hydrolysis and fermentation. The effect of yeast concentrations (8%, 10%, and 12%) and fermentation times (6, 7, 8, 12, and 13 days) on the pretreated sample was also analyzed. Fermentation was carried out using enzymatic kinetic modeling with Michaelis Menten’s equations to determine the reaction rate. The results showed that the sample with 12% yeast and fermentation time of 13 days produced the highest ethanol content (41.5%). In addition, the appropriate kinetic modeling results were similar to Hanes Woolf’s linearization modeling. The 10% yeast concentration led to KM values of 1.606×10-3g mL-1 and Vmax of 6.837×10-4g mL-1h.