Development of Bioethanol Synthesis Process Based on Lignocellulosic Biomass Waste: A Sustainable Approach for Renewable Energy
DOI:
https://doi.org/10.58445/rars.3451Keywords:
Bioethanol Synthesis Process, Lignocellulosic Biomass Waste, Renewable EnergyAbstract
The increasing concern over climate change and the depletion of fossil fuels has encouraged greater attention toward renewable energy sources. This study explored how bioethanol can be synthesized from lignocellulosic biomass, specifically rice straw and rice husk. The process involved three main steps: pretreatment with acid-alkali to remove lignin barriers, enzyme hydrolysis to release fermentable sugars, and fermentation using Saccharomyces cerevisiae to produce ethanol.
The fermentation progress was observed through five days and the observable changes were performed qualitatively using multiple indicators: odor, condensation, and CO2 bubble formation. Based on these indicators, it has been confirmed that ethanol was successfully synthesized. Additionally, the mass balance studies indicated that the biomass samples showed measurable decrease in mass during the pre-treatment and fermentation process, which further supported that sugars were broken down and converted. Due to the absence of laboratory instruments for chemical analysis, an accurate and precise ethanol concentration could not be measured.
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