Glycerol organosolv pretreatment can unlock lignocellulosic biomass for production of fermentable sugars: Present situation and challenges

Chihe Sun, Hongyan Ren, Fubao Sun, Yun Hu, Qiangqiang Liu, Guojie Song, Ali Abdulkhani, Pau Loke Show

Research output: Contribution to journalReview articlepeer-review

47 Scopus citations

Abstract

The complex structure of lignocellulosic biomass forms the recalcitrance to prevent the embedded holo-cellulosic sugars from undergoing the biodegradation. Therefore, a pretreatment is often required for an efficient enzymatic lignocellulosic hydrolysis. Recently, glycerol organosolv (GO) pretreatment is revealed potent in selective deconstruction of various lignocellulosic biomass and effective improvement of enzymatic hydrolysis. Evidently, the GO pretreatment is capable to modify the structure of dissolved components by glycerolysis, i.e., by trans-glycosylation onto glyceryl glycosides and by hydroxylation grafting onto glyceryl lignin. Such modifications tend to protect these main components against excessive degradation, which can be mainly responsible for the obviously less fermentation inhibitors arising in the GO pretreatment. This pretreatment can provide opportunities for valorization of emerging lignocellulosic biorefinery with production of value-added biochemicals. Recent advances in GO pretreatment of lignocellulosic biomass followed by enzymatic hydrolysis are reviewed, and perspectives are made for addressing remaining challenges.

Original languageBritish English
Article number126264
JournalBioresource Technology
Volume344
DOIs
StatePublished - Jan 2022

Keywords

  • Components recovery
  • Enzymatic saccharification
  • Lignocellulosic biomass
  • Organosolv lignin
  • Organosolv pretreatment
  • Structure modification

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