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<p>This study presents a combination of three different pretreatments of sugarcane bagasse (SCB) aimed at increasing levoglucosan (LGA) yield during fast pyrolysis. SCB samples were subjected, individually or in combination, to the following pretreatments: distilled-water leaching, torrefaction at 290&#xa0;°C for varying residence times (5, 7.5, and 10&#xa0;min), and fungal decay employing white rot (<i>Trametes versicolor</i>) or brown rot (<i>Coniophora puteana</i>) over durations, ranging from 2 to 12&#xa0;weeks, respectively. The combined pretreatment of torrefaction (5&#xa0;min) and fungal degradation by <i>C. puteana</i> for 12-weeks considerably reduced the hemicellulose (by 61.04%) and lignin (by 56.61%) content of the SCB, while increasing the cellulose concentration by 153.4%, leading to enhanced LGA production during fast pyrolysis. Additionally, the optimal pretreatment conditions involved water-leaching followed by torrefaction for 7.5&#xa0;min at 290&#xa0;°C, combined with and the action of the white rot fungus Trametes versicolor during 4&#xa0;weeks which after rapid pyrolysis leads to the highest LGA yield of 11.59%. The combined pretreatments effectively improved SCB’s chemical composition and enhanced the properties of its bio-oil produced during fast pyrolysis process.</p>

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Fungal and torrefaction pretreatment of sugarcane bagasse through fast pyrolysis: maximizing levoglucosan production

  • 期刊论文

  • 发表日期：

    2025年11月21日

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  • Bruno de Freitas Homem de Faria,
  • Sarah de Paiva Silva Pereira,
  • Geraldo Ferreira David,
  • Paula Santana Barbosa,
  • Kévin Candelier,
  • Angélica de Cássia Oliveira Carneiro,
  • Sergio Antonio Fernandes

摘要

This study presents a combination of three different pretreatments of sugarcane bagasse (SCB) aimed at increasing levoglucosan (LGA) yield during fast pyrolysis. SCB samples were subjected, individually or in combination, to the following pretreatments: distilled-water leaching, torrefaction at 290 °C for varying residence times (5, 7.5, and 10 min), and fungal decay employing white rot (Trametes versicolor) or brown rot (Coniophora puteana) over durations, ranging from 2 to 12 weeks, respectively. The combined pretreatment of torrefaction (5 min) and fungal degradation by C. puteana for 12-weeks considerably reduced the hemicellulose (by 61.04%) and lignin (by 56.61%) content of the SCB, while increasing the cellulose concentration by 153.4%, leading to enhanced LGA production during fast pyrolysis. Additionally, the optimal pretreatment conditions involved water-leaching followed by torrefaction for 7.5 min at 290 °C, combined with and the action of the white rot fungus Trametes versicolor during 4 weeks which after rapid pyrolysis leads to the highest LGA yield of 11.59%. The combined pretreatments effectively improved SCB’s chemical composition and enhanced the properties of its bio-oil produced during fast pyrolysis process.