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<p>Resting cell-catalyzed xylonic acid (XA) offers a promising strategy for developing an efficient lignocellulose biorefinery that relies on a systematic self-providing acid pretreatment. Xylo-oligosaccharides, XA, and glucose are co-produced from hemicellulose and cellulose components through a combination of XA pretreatment corncob, resting cell catalysis of xylose, and enzymatic hydrolysis of cellulose. However, the inevitable formation of degraded inhibitors and XA can synergistically impede biological processes during XA recycling and pretreatment. An anion exchange resin serves a dual function role, acting as an intelligent regulator of inhibitors and XA in the resting cell catalysis of pretreated hydrolysates, and efficiently facilitating the centrifugal separation and recycling of bacterial cells for xylose conversion to XA. After five consecutive rounds of co-recovery of the resin and bacterial cells, 91.6% of the bacteria remained viable, and the xylose conversion to XA yield reached 82.2%.</p>

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Dual roles of anion exchange resin in green lignocellulose biorefinery system based on self-providing acid pretreatment

  • 期刊论文

  • 发表日期：

    2025年4月17日

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  • Yang Lv,
  • Haijiong Lu,
  • Alfred Elikem Kwami Afedzi,
  • Ikram ul Haq,
  • Yong Xu

摘要

Resting cell-catalyzed xylonic acid (XA) offers a promising strategy for developing an efficient lignocellulose biorefinery that relies on a systematic self-providing acid pretreatment. Xylo-oligosaccharides, XA, and glucose are co-produced from hemicellulose and cellulose components through a combination of XA pretreatment corncob, resting cell catalysis of xylose, and enzymatic hydrolysis of cellulose. However, the inevitable formation of degraded inhibitors and XA can synergistically impede biological processes during XA recycling and pretreatment. An anion exchange resin serves a dual function role, acting as an intelligent regulator of inhibitors and XA in the resting cell catalysis of pretreated hydrolysates, and efficiently facilitating the centrifugal separation and recycling of bacterial cells for xylose conversion to XA. After five consecutive rounds of co-recovery of the resin and bacterial cells, 91.6% of the bacteria remained viable, and the xylose conversion to XA yield reached 82.2%.