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The aim was to conduct a Life Cycle Assessment (LCA) of bioethanol production from potato and banana waste, encompassing pretreatment, enzymatic hydrolysis, and fermentation steps. The LCA utilized Simapro 8.5.0.0 software with inventory data from Ecoinvent 3.4 and Impact 2002+ as the impact assessment methodology. Uncertainty analysis was performed using the Monte Carlo method. Two scenarios were analyzed: one considering energy consumption and the other without. Among the 15 impact categories evaluated by Impact 2002+, respiratory inorganics and global warming had the most significant impacts for both types of waste in both scenarios. In energy consumption scenarios, fermentation had the greatest impact on both banana and potato waste, while in scenarios without energy consumption, pretreatment had the most significant impact on both types of waste. Ethanol production from banana waste showed greater impacts than from potato waste. The study identified energy demand and the use of sodium phosphate in pretreatment as critical points in the LCA, associated with the largest impacts. Consequently, there is a pressing need to adopt sustainable energy sources and find more sustainable substitutes for sodium phosphate in the bioethanol production process.

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Valorization of Potato and Banana Waste in Bioethanol Production: A Life Cycle Assessment Perspective

  • 章节

  • 发表日期：

    2025年

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  • Victória Dutra Fagundes,
  • João Felipe Freitag,
  • Viviane Simon,
  • Ênio Leandro Machado,
  • Rosana de Cassia de Souza Schneider,
  • Luciane Maria Colla

摘要

The aim was to conduct a Life Cycle Assessment (LCA) of bioethanol production from potato and banana waste, encompassing pretreatment, enzymatic hydrolysis, and fermentation steps. The LCA utilized Simapro 8.5.0.0 software with inventory data from Ecoinvent 3.4 and Impact 2002+ as the impact assessment methodology. Uncertainty analysis was performed using the Monte Carlo method. Two scenarios were analyzed: one considering energy consumption and the other without. Among the 15 impact categories evaluated by Impact 2002+, respiratory inorganics and global warming had the most significant impacts for both types of waste in both scenarios. In energy consumption scenarios, fermentation had the greatest impact on both banana and potato waste, while in scenarios without energy consumption, pretreatment had the most significant impact on both types of waste. Ethanol production from banana waste showed greater impacts than from potato waste. The study identified energy demand and the use of sodium phosphate in pretreatment as critical points in the LCA, associated with the largest impacts. Consequently, there is a pressing need to adopt sustainable energy sources and find more sustainable substitutes for sodium phosphate in the bioethanol production process.