Bioconversion Technologies for Bioethanol Production from Lignocellulosic Biomass
Summary
Bioconversion of lignocellulosic biomass to bioethanol represents a sustainable route to renewable fuels, utilising agricultural residues, forestry wastes and dedicated energy crops. The process typically comprises pretreatment to disrupt the rigid plant cell wall matrix, enzymatic hydrolysis to release fermentable sugars and microbial fermentation to convert sugars into ethanol. Advances in pretreatment methods—including steam explosion, dilute acid and alkaline processes—have improved the accessibility of cellulose and hemicellulose while mitigating inhibitory by-products. Concurrently, engineering of enzyme cocktails and microbial strains has enhanced hydrolysis efficiency and fermentation yields. Integrated approaches such as consolidated bioprocessing and simultaneous saccharification and fermentation reduce energy input and capital costs. Valorisation of residual lignin fractions for high-value chemicals further strengthens economic viability. Continued innovation is expanding feedstock diversity, driving down production costs and reducing greenhouse-gas emissions on a global scale.
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Bioconversion Technologies for Bioethanol Production from Lignocellulosic Biomass publication trend
The graph below shows the total number of articles in bioconversion technologies for bioethanol production from lignocellulosic biomass across all publications each year (not limited to Nature Index journals).
Technical terms
Lignocellulosic biomass: Plant material composed of cellulose, hemicellulose and lignin, resistant to degradation.
Pretreatment: A physical, chemical or biological step that alters biomass structure to improve enzyme accessibility.
Enzymatic hydrolysis: Conversion of cellulose and hemicellulose into fermentable sugars by cellulase and hemicellulase enzymes.
Simultaneous saccharification and fermentation (SSF): A process combining enzymatic hydrolysis and microbial fermentation in one vessel to reduce inhibition and costs.
Consolidated bioprocessing (CBP): Integration of enzyme production, hydrolysis and fermentation in a single microbial host or reactor.
Recalcitrance: The inherent resistance of lignocellulosic biomass to enzymatic breakdown due to structural complexity.
Lignin valorisation: Utilisation of residual lignin fractions for the production of chemicals, fuels or materials to enhance process economics.
References
- Bioethanol Production from Woody Biomass: Recent Advances on the Effect of Pretreatments on the Bioconversion Process and Energy Yield Aspects. Energies (2023).
- Intensification of Bioethanol Production from Different Lignocellulosic Biomasses, Induced by Various Pretreatment Methods: An Updated Review. Energies (2022).
- Deacetylation kinetics of promising energy crops, hemp and kenaf, for cellulosic ethanol production. GCB Bioenergy (2022).
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