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Smart removal of monosaccharide contaminants in xylo-oligosaccharide slurry using sandwich-integration bioprocess of whole-cell catalysis combined with electrodialysis separation

Author

Listed:
  • Liu, Xinlu
  • Cao, Rou
  • Nawaz, Ali
  • Haq, Ikram ul
  • Zhou, Xin
  • Xu, Yong

Abstract

Acetic acid hydrolysis is a green and novel approach that can effectively convert lignocellulosic biomass into high-valued xylo-oligosaccharide (XOS). However, the residual acidolysis slurry still contains acetic acid and various monosaccharides. In this study, a sandwich-integration bioprocess (SIBP) method was developed to efficiently remove the residual monosaccharide contaminants by the combination of whole-cell catalysis and electrodialysis separation. Firstly, the acetic acid in acidolysis slurry was separated by electrodialysis to eliminate the strong toxic inhibition on whole-cell catalysis. Secondly, the monosaccharides were oxidized to the corresponding ionogenic acids by whole-cell catalysis. Finally, these ionogenic aldonic acids were removed readily by the second electrodialysis step. Herein, whole-cell catalysis step was combined with two electrodialysis separation steps into SIBP, in which 131.4 g XOS and 79 g aldonic acids were obtained from 1 kg corncob and more than 93.1% acetic acid was recycled.

Suggested Citation

  • Liu, Xinlu & Cao, Rou & Nawaz, Ali & Haq, Ikram ul & Zhou, Xin & Xu, Yong, 2021. "Smart removal of monosaccharide contaminants in xylo-oligosaccharide slurry using sandwich-integration bioprocess of whole-cell catalysis combined with electrodialysis separation," Renewable Energy, Elsevier, vol. 168(C), pages 1149-1156.
    • Handle: RePEc:eee:renene:v:168:y:2021:i:c:p:1149-1156
    DOI: 10.1016/j.renene.2021.01.007
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