Optimalization of lignocellulosic biomass pretreatment for enhanced methane yield in anaerobic digestion

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F25%3A10258582" target="_blank" >RIV/61989100:27710/25:10258582 - isvavai.cz</a>

Result on the web

<a href="https://www.sardiniasymposium.it/en/symposium-programme-2025" target="_blank" >https://www.sardiniasymposium.it/en/symposium-programme-2025</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Optimalization of lignocellulosic biomass pretreatment for enhanced methane yield in anaerobic digestion

Original language description

The efficiency of anaerobic digestion of lignocellulosic biomass is strongly limited by its rigid structure and high lignin content, which restrict microbial accessibility and lower methane yields. This study evaluates the effect of photocatalytic and hydrolytic pre-treatments on the biodegradability and methane production potential of spruce sawdust, a substrate characterized by high cellulose (46.62 %wtTS) and lignin (26.56 %wtTS) content. Pre-treated and untreated samples were subjected to biochemical methane potential tests under mesophilic conditions. Preliminary results revealed that untreated sawdust achieved the lowest methane yield (~ 0.016 m³/kgVS). Photocatalytic pre-treatment significantly enhanced methane production, reaching ~ 0.026 m³/kgVS after 20 days, with production still increasing. In contrast, hydrolytic pre-treatment led to a rapid initial methane release (~ 0.012 m³/kgVS), but production stagnated, resulting in only a marginal improvement over untreated sawdust. The stagnation is likely associated with the formation of inhibitory compounds during hydrolysis. These findings indicate that photocatalytic pre-treatment is a promising strategy for improving methane yields from lignocellulosic substrates, whereas hydrolytic pre-treatment may negatively affect process efficiency.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20700 - Environmental engineering

Project

<a href="/en/project/TQ15000116" target="_blank" >TQ15000116: Regional and sustainable production of hydrogen from renewable sources</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů