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<p>Lignin removal from sugarcane bagasse waste traditionally depends on harsh chemicals and high temperatures, posing challenges to sustainability and energy efficiency. This work explores on the use of deep eutectic solvents (DES), synthesized from choline chloride (ChCl) and glycerol (Gly), as a green and milder alternative for lignin extraction at temperatures ranging from 75–100° C. Using response surface methodology (RSM) based on central composite design (CCD), optimal conditions were identified at a ChCl/Gly molar ratio of 1:3, a treatment of temperature of 100&#xa0;°C, and a liquid-to-solid ratio of 20:1, achieving a lignin removal efficiency of 80.14%. Characterization via scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) highlighted that DES pretreatment disrupted lignin structure and enhanced the crystallinity to 55.70%, significantly increasing its cellulose content. Overall, the proposed DES system aligns with the principles of green chemistry by substituting hazardous reagents with environmentally friendly alternatives, thereby offering a sustainable approach to lignin valorization for the production of high-value products such as lactic acid.</p>

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Optimization of DES-based Pretreatment for Enhanced Lignin Removal from Sugarcane Bagasse: An Experimental and Response Surface Methodology Approach

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Rossy Choerun Nissa,
  • Robertus Wahyu N. Nugroho,
  • Maya Irmayanti,
  • Raden Permana Budi Laksana,
  • Yeyen Nurhamiyah,
  • Sukma Surya Kusumah,
  • Fitri Khoerunnisa,
  • Akbar Hanif Dawam Abdullah,
  • Safri Ishmayana,
  • Dadan Sumiarsa,
  • Hidawati hidawati,
  • Hidayat hidayat,
  • Fateha fateha

摘要

Lignin removal from sugarcane bagasse waste traditionally depends on harsh chemicals and high temperatures, posing challenges to sustainability and energy efficiency. This work explores on the use of deep eutectic solvents (DES), synthesized from choline chloride (ChCl) and glycerol (Gly), as a green and milder alternative for lignin extraction at temperatures ranging from 75–100° C. Using response surface methodology (RSM) based on central composite design (CCD), optimal conditions were identified at a ChCl/Gly molar ratio of 1:3, a treatment of temperature of 100 °C, and a liquid-to-solid ratio of 20:1, achieving a lignin removal efficiency of 80.14%. Characterization via scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) highlighted that DES pretreatment disrupted lignin structure and enhanced the crystallinity to 55.70%, significantly increasing its cellulose content. Overall, the proposed DES system aligns with the principles of green chemistry by substituting hazardous reagents with environmentally friendly alternatives, thereby offering a sustainable approach to lignin valorization for the production of high-value products such as lactic acid.