Recent advances in lignin valorization with bacterial cultures: microorganisms, metabolic pathways, and bio-products

Lignin is the most abundant aromatic substrate on Earth and its valorization technologies are still under developed. Depolymerization and fragmentation are the predominant preparatory strategies for valorization of lignin to chemicals and fuels. However, due to the structural heterogeneity of lignin...

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Bibliographic Details
Published in:Biotechnology for biofuels 2019-02, Vol.12 (1), p.32-32, Article 32
Main Authors: Xu, Zhaoxian, Lei, Peng, Zhai, Rui, Wen, Zhiqiang, Jin, Mingjie
Format: Article
Language:English
Subjects:
Alcohol
Aromatic compounds
Bacteria
biochemical pathways
Biodegradation
Biodiesel fuels
Biorefinery
Biosynthesis
Cellulose
Chemical plants
Chemical properties
Depolymerization
Ethanol
Fragmentation
fuels
Heterogeneity
Lignin
Lignin valorization
Lignin-degrading bacteria
Lignocellulose
Metabolic pathways
Metabolism
Metabolism of lignin-based aromatics
Methods
Methylene blue
Microorganisms
Organic chemistry
Purification
Review
Substrates
Technology
Trends
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Summary:Lignin is the most abundant aromatic substrate on Earth and its valorization technologies are still under developed. Depolymerization and fragmentation are the predominant preparatory strategies for valorization of lignin to chemicals and fuels. However, due to the structural heterogeneity of lignin, depolymerization and fragmentation typically result in diverse product species, which require extensive separation and purification procedures to obtain target products. For lignin valorization, bacterial-based systems have attracted increasing attention because of their diverse metabolisms, which can be used to funnel multiple lignin-based compounds into specific target products. Here, recent advances in lignin valorization using bacteria are critically reviewed, including lignin-degrading bacteria that are able to degrade lignin and use lignin-associated aromatics, various associated metabolic pathways, and application of bacterial cultures for lignin valorization. This review will provide insight into the recent breakthroughs and future trends of lignin valorization based on bacterial systems.
ISSN:1754-6834
1754-6834
DOI:10.1186/s13068-019-1376-0