A comprehensive review on the framework to valorise lignocellulosic biomass as biorefinery feedstocks

The Science of the Total Environment
Hang P VuLong D Nghiem

Abstract

An effective pretreatment is the first step to enhance the digestibility of lignocellulosic biomass - a source of renewable, eco-friendly and energy-dense materials - for biofuel and biochemical productions. This review aims to provide a comprehensive assessment on the advantages and disadvantages of lignocellulosic pretreatment techniques, which have been studied at the lab-, pilot- and full-scale levels. Biological pretreatment is environmentally friendly but time consuming (i.e. 15-40 days). Chemical pretreatment is effective in breaking down lignocellulose and increasing sugar yield (e.g. 4 to 10-fold improvement) but entails chemical cost and expensive reactors. Whereas the combination of physical and chemical (i.e. physicochemical) pretreatment is energy intensive (e.g. energy production can only compensate 80% of the input energy) despite offering good process efficiency (i.e. > 100% increase in product yield). Demonstrations of pretreatment techniques (e.g. acid, alkaline, and hydrothermal) in pilot-scale have reported 50-80% hemicellulose solubilisation and enhanced sugar yields. The feasibility of these pilot and full-scale plants has been supported by government subsidies to encourage biofuel consumption (e.g. tax cr...Continue Reading

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Citations

Oct 24, 2020·The Science of the Total Environment·Amaia MoralesPatricia Gullón
Mar 28, 2021·International Journal of Biological Macromolecules·Jéssica S MarcianoDerval S Rosa
Apr 26, 2021·The Science of the Total Environment·Judith González-AriasJorge Cara-Jiménez
Jul 28, 2021·Enzyme and Microbial Technology·Victor E Balderas HernándezAntonio De Leon-Rodriguez
Nov 4, 2021·Bioresource Technology·Alvin B CulabaJo-Shu Chang

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