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Holistic lignocellulosic biorefinery approach for dual production of bioethanol and xylonic acid coupled with efficient dye removal

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  • Madadi, Meysam
  • Elsayed, Mahdy
  • Song, Guojie
  • Bakr, Mahmoud M.
  • Qin, Yuanhang
  • Sun, Fubao
  • Abomohra, Abdelfatah

Abstract

The complete valorization of lignocellulosic biomass (LCB) to valuable bio-products with one-step fractionation is still challenging. This study represents sustainable waste-free biorefinery routes for efficient fractionation of LCB, employing a novel pretreatment method using hydrotropic p–toluenesulfonic acid (TsOH) mixed with pentanol. The potential of LCB pretreatment using TsOH/pentanol reagent as lignin absorbent with co-production of bioethanol and xylonic acid was investigated. Biomass pretreatment at 120 °C for 40 min with 20% TsOH dosage was the optimal condition that significantly dissolved more than 88.2% of lignin and 95.1% of hemicellulose in the biphasic phase, while 95.6% of cellulose was retained in the solid phase. Further fermentation of cellulose-rich fraction using Saccharomyces cerevisiae resulted in 225 g kg−1 bioethanol yield. In addition, xylose-rich phase was converted into xylonic acid by Gluconobacter oxydans fermentation with a yield of 202 g kg−1. Importantly, the isolated lignin was altered by acid groups during sulphonation through TsOH/pentanol pretreatment, which makes lignin a potential adsorbent for cationic contaminants in wastewater. In particular, the isolated lignin achieved high adsorption capacity (300 mg/g) of methylene blue. The proposed biorefinery routes showed a high net positive energy of 3.65 MJ kg−1 dry biomass with an energy ratio of 1.70. Therefore, this study provides an innovative synergistic pretreatment using TsOH/pentanol as a promising fractionation process for efficient cascade valorization of LCB into valuable bio-products.

Suggested Citation

  • Madadi, Meysam & Elsayed, Mahdy & Song, Guojie & Bakr, Mahmoud M. & Qin, Yuanhang & Sun, Fubao & Abomohra, Abdelfatah, 2023. "Holistic lignocellulosic biorefinery approach for dual production of bioethanol and xylonic acid coupled with efficient dye removal," Renewable and Sustainable Energy Reviews, Elsevier, vol. 185(C).
  • Handle: RePEc:eee:rensus:v:185:y:2023:i:c:s1364032123004628
    DOI: 10.1016/j.rser.2023.113605
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    References listed on IDEAS

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    1. Ali Abdulkhani & Zahra Echresh Zadeh & Solomon Gajere Bawa & Fubao Sun & Meysam Madadi & Xueming Zhang & Basudeb Saha, 2023. "Comparative Production of Bio-Oil from In Situ Catalytic Upgrading of Fast Pyrolysis of Lignocellulosic Biomass," Energies, MDPI, vol. 16(6), pages 1-19, March.
    2. Tong, Wenyao & Chu, Qiulu & Li, Jin & Xie, Xinyu & Wang, Jing & Jin, Yongcan & Wu, Shufang & Hu, Jinguang & Song, Kai, 2022. "Insight into understanding sequential two-stage pretreatment on modifying lignin physiochemical properties and improving holistic utilization of renewable lignocellulose biomass," Renewable Energy, Elsevier, vol. 187(C), pages 123-134.
    3. Islam, Md Khairul & Rehman, Shazia & Guan, Jianyu & Lau, Chun-Yin & Tse, Ho-Yin & Yeung, Chi Shun & Leu, Shao-Yuan, 2021. "Biphasic pretreatment for energy and carbon efficient conversion of lignocellulose into bioenergy and reactive lignin," Applied Energy, Elsevier, vol. 303(C).
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    1. Song, Guojie & Bai, Yalin & Pan, Zhenying & Liu, Dan & Qin, Yuanhang & Zhang, Yinchao & Fan, Zhihao & Li, Yuhan & Madadi, Meysam, 2024. "Enhancing fermentable sugar production from sugarcane bagasse through surfactant-assisted ethylene glycol pretreatment and enzymatic hydrolysis: Reduced temperature and enzyme loading," Renewable Energy, Elsevier, vol. 227(C).

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