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

Kód výsledku v 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>

Výsledek na webu

<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

—

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

20700 - Environmental engineering

Projekt

<a href="/cs/project/TQ15000116" target="_blank" >TQ15000116: Regionální a udržitelná produkce vodíku z obnovitelných zdrojů</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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