Journal
BIORESOURCE TECHNOLOGY
Volume 344, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.126264
Keywords
Lignocellulosic biomass; Organosolv pretreatment; Enzymatic saccharification; Structure modification; Organosolv lignin; Components recovery
Funding
- National Key Research and Development Program of China [2019YFE0114600]
- National Natural Science Foundation of China [21776114, 21808087, 52106245]
- Jiangsu Provincial Natural Science Foundation of China [BK20181347]
- Jiangsu Province Six Talent Peak [XNY-010]
- 111 Project [111-2-06]
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The complex structure of lignocellulosic biomass impedes efficient enzymatic hydrolysis, necessitating pretreatment. Glycerol organosolv (GO) pretreatment has shown promising results in selectively deconstructing biomass and improving enzymatic hydrolysis by modifying dissolved components and reducing fermentation inhibitors.
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 transglycosylation 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.
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