Recent advances in methane and hydrogen production from lignocellulosic degradation with anaerobic fungi - PubMed

Review

Recent advances in methane and hydrogen production from lignocellulosic degradation with anaerobic fungi

Jinsong Liang et al. Bioresour Technol. 2024 Dec.

Abstract

Anaerobic fungi (AF) efficiently degrade lignocellulosic biomass with unique pseudoroot system and enzymatic properties that can remove polysaccharides and some lignified components from plant cell walls, further releasing acetate, lactate, ethanol, hydrogen (H₂), etc. As research on AF for bioengineering has become a hot topic, a review of lignocellulosic conversion with AF for methane (CH₄) and H₂ production is needed. Efficient degradation of lignocellulose with AF mainly relies on multiple free carbohydrate-active enzymes and cellulosomes in the free and bound state. Meanwhile, co-cultivation of AF and methanogens significantly improves the lignocellulose degradation and CH₄ production, and the maximum CH₄ yield reached 315 mL/g. Bioaugmentation of AF in anaerobic digestion increases the maximum CH₄ yield by 330 %. Also, AF show H₂ production potential, however, H₂ yield from anaerobic fungal fermentation of lignocellulose remains low. Therefore, anaerobic fungi have great potential in the conversion of lignocellulosic biomass to CH₄ and H₂.

Keywords: Bioaugmentation; Biological pretreatment; Biomass waste; Cellulosome; Hydrogen; Methane.

Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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