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<p>This study examines the effect of fermentation as a pre-treatment on the thermal kinetics and product quality of pyrolysis. Sugarcane bagasse was fermented using <i>Pleurotus ostreatus</i> prior to pyrolysis. Thermal degradation kinetics were analyzed using the Flynn–Wall–Ozawa isoconversional method and Kissinger’s approach. Kinetic modeling was also conducted for the three main lignocellulosic components. The results showed that fermentation reduced the activation energy of pyrolysis from 145 to 148&#xa0;kJ/mol to 115–120&#xa0;kJ/mol. Thermal decomposition also began earlier, at 180&#xa0;°C, compared to 200&#xa0;°C in the untreated sample. At the component level, the activation energy decreased from 110 to 90&#xa0;kJ/mol for hemicellulose, from 145 to 120&#xa0;kJ/mol for cellulose, and from 200 to 190&#xa0;kJ/mol for lignin. The conversion degree (α) at 600&#xa0;K also increased after fermentation. For hemicellulose, α rose from 0.85 in the control to 0.95 in the fermented sample. For cellulose, it increased from 0.65 to 0.80. Fermentation reduced lignocellulose crystallinity, as confirmed by XRD results indicating disruption of the cellulose structure. Biochar yield decreased from 30.1% to 24.3% due to microbial degradation. However, the increase in fixed carbon and nitrogen content improved its quality as an adsorbent or soil amendment. Bio-oil yield also dropped slightly, from 28.5% to 25.1%. Despite this reduction, the chemical profile changed significantly. The concentrations of valuable volatile compounds—such as acetic acid, phenol, guaiacol, and furfural—increased. These changes reflect improved chemical reactivity and oxygen content, making the bio-oil more suitable for catalytic upgrading or conversion into bio-based chemicals rather than direct fuel use.</p>

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Valorization of Sugarcane Bagasse Via Pre-Pyrolysis Fermentation with Pleurotus ostreatus: Thermal Kinetics and Product Quality Enhancement

  • 期刊论文

  • 发表日期：

    2026年1月29日

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  • Budianto Budianto,
  • Rinny Ermiyanti Yasin

摘要

This study examines the effect of fermentation as a pre-treatment on the thermal kinetics and product quality of pyrolysis. Sugarcane bagasse was fermented using Pleurotus ostreatus prior to pyrolysis. Thermal degradation kinetics were analyzed using the Flynn–Wall–Ozawa isoconversional method and Kissinger’s approach. Kinetic modeling was also conducted for the three main lignocellulosic components. The results showed that fermentation reduced the activation energy of pyrolysis from 145 to 148 kJ/mol to 115–120 kJ/mol. Thermal decomposition also began earlier, at 180 °C, compared to 200 °C in the untreated sample. At the component level, the activation energy decreased from 110 to 90 kJ/mol for hemicellulose, from 145 to 120 kJ/mol for cellulose, and from 200 to 190 kJ/mol for lignin. The conversion degree (α) at 600 K also increased after fermentation. For hemicellulose, α rose from 0.85 in the control to 0.95 in the fermented sample. For cellulose, it increased from 0.65 to 0.80. Fermentation reduced lignocellulose crystallinity, as confirmed by XRD results indicating disruption of the cellulose structure. Biochar yield decreased from 30.1% to 24.3% due to microbial degradation. However, the increase in fixed carbon and nitrogen content improved its quality as an adsorbent or soil amendment. Bio-oil yield also dropped slightly, from 28.5% to 25.1%. Despite this reduction, the chemical profile changed significantly. The concentrations of valuable volatile compounds—such as acetic acid, phenol, guaiacol, and furfural—increased. These changes reflect improved chemical reactivity and oxygen content, making the bio-oil more suitable for catalytic upgrading or conversion into bio-based chemicals rather than direct fuel use.