Valorization of Pineapple Peel for Bioethanol Production: Investigating Yeast Fermentation Factors
نویسندگان
1 Department of Chemistry, Industrial Chemistry Unit, School of Physical Science, College of Agriculture and Natural Sciences, University of Cape Coast, Cape Coast, Ghana.
2 Department of Chemistry, Industrial Chemistry Unit, School of Physical Science, College of Agriculture and Natural Sciences, University of Cape Coast, Cape Coast, Ghana.
3 Department of Chemistry, Industrial Chemistry Unit, School of Physical Science, College of Agriculture and Natural Sciences, University of Cape Coast, Cape Coast, Ghana.
4 Department of Chemical and Renewable Energy Engineering, School of Sustainable Engineering, College of Agriculture and Natural Sciences, University of Cape Coast, , Cape Coast, Ghana.
5 Department of Chemistry, Industrial Chemistry Unit, School of Physical Science, College of Agriculture and Natural Sciences, University of Cape Coast, Cape Coast, Ghana.
6 Department of Chemistry, Industrial Chemistry Unit, School of Physical Science, College of Agriculture and Natural Sciences, University of Cape Coast, Cape Coast, Ghana.
7 Department of Sustainable Energy, College of Environmental Science and Forestry, State University of New York, New York, USA.
doi
10.30501/jree.2026.518038.2358چکیده
This study focuses on upcycling pineapple peels (PPs), an agricultural waste, into bioethanol to address environmental challenges. The PPs contain 65% carbohydrates, making them a promising source for bioethanol production. Hydrolysis was performed using different concentrations of H2SO4 and HCl, followed by fermentation with Saccharomyces cerevisiae. The results show that temperature, pH, acid concentration, and fermentation duration significantly affect the quantity of bioethanol produced. Specifically, concentrations of 2.5 M and 2.0 M for H2SO4 and HCl, respectively, along with pH values of 5.0 and 4.5, a fermentation duration of five days, and a temperature of 35°C, provided the highest ethanol yield. Boiling point determination, flammability testing, and chromic and Fourier Transform Infrared (FTIR) spectroscopy were conducted to confirm the presence of bioethanol in the crude product. The results indicate that PPs are a suitable raw material for bioethanol production, offering economic and environmental benefits while providing insights into optimal processing conditions. The combined application of kinetic model validation and sustainability assessment in this study represents a distinctive methodological contribution, reinforcing the connection between process optimization and circular economy principles.
