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Abstract <p>In the present study, sisal (<i>Agave sisalana</i>) defibration residue was used as a raw material to obtain fermentable sugars and phenolic compounds through integrated processes. Hydrothermal pretreatments under different temperature conditions (160, 180, and 200&#xa0;°C) and incubation times (30, 60, and 90&#xa0;min) were performed to promote cellulose enrichment and, consequently, enzymatic digestibility. The enzymatic hydrolysis residue was then used as a precursor for phenolic compounds via alkaline hydrolysis, evaluating the effects of sodium hydroxide concentrations (2%, 4%, and 6%, w/v) and hydrogen peroxide concentrations (0%, 1%, and 2%, v/v). In general, increasing pretreatment severity led to greater losses of extractives, ash, and hemicellulose at the expense of increased cellulose content and crystallinity index. The best pretreatment condition was 180&#xa0;°C for 60&#xa0;min, which increased cellulose content from 16.43% to 38.91% and glucose release from 3.0 to 17.2&#xa0;g/L (conversion = 79.7%) at 5% solids. Under high solid loadings, enzymatic hydrolysis of pretreated sisal residue was also successful, yielding glucose levels above 90&#xa0;g/L (at 30% solids). The production of phenolic compounds (mainly vanillin) was achieved by increasing sodium hydroxide and eliminating hydrogen peroxide, reaching a maximum concentration of 2,115.6&#xa0;mg/L using 4% sodium hydroxide and 20% solids. Therefore, this study contributes to understanding the potential of sisal as a precursor to value-added products and may contribute to the development of technologies using plants from arid zones.</p> Graphical Abstract <p></p>

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Integrated Production of Fermentable Sugars and Phenolic Compounds from Sisal Residue

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月18日

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  • Habila Yusuf Thomas,
  • Gabriela Guimarães Lourenço,
  • Jackson Araújo de Oliveira,
  • Domingos Fabiano de Santana Souza,
  • Emmanuel Damilano Dutra,
  • Carlos Eduardo de Araújo Padilha

摘要

Abstract

In the present study, sisal (Agave sisalana) defibration residue was used as a raw material to obtain fermentable sugars and phenolic compounds through integrated processes. Hydrothermal pretreatments under different temperature conditions (160, 180, and 200 °C) and incubation times (30, 60, and 90 min) were performed to promote cellulose enrichment and, consequently, enzymatic digestibility. The enzymatic hydrolysis residue was then used as a precursor for phenolic compounds via alkaline hydrolysis, evaluating the effects of sodium hydroxide concentrations (2%, 4%, and 6%, w/v) and hydrogen peroxide concentrations (0%, 1%, and 2%, v/v). In general, increasing pretreatment severity led to greater losses of extractives, ash, and hemicellulose at the expense of increased cellulose content and crystallinity index. The best pretreatment condition was 180 °C for 60 min, which increased cellulose content from 16.43% to 38.91% and glucose release from 3.0 to 17.2 g/L (conversion = 79.7%) at 5% solids. Under high solid loadings, enzymatic hydrolysis of pretreated sisal residue was also successful, yielding glucose levels above 90 g/L (at 30% solids). The production of phenolic compounds (mainly vanillin) was achieved by increasing sodium hydroxide and eliminating hydrogen peroxide, reaching a maximum concentration of 2,115.6 mg/L using 4% sodium hydroxide and 20% solids. Therefore, this study contributes to understanding the potential of sisal as a precursor to value-added products and may contribute to the development of technologies using plants from arid zones.

Graphical Abstract