Mitigating ammonia inhibition in anaerobic digestion with lignin-based carbon materials synthesized by hydrothermal carbonization DOI Creative Commons
Shuaishuai Ma, Hongliang Wang, Xin Gao

и другие.

Carbon Research, Год журнала: 2025, Номер 4(1)

Опубликована: Фев. 4, 2025

Abstract Ammonia inhibition poses a significant challenge to the efficient and stable operation of anaerobic digestion (AD) systems by leading volatile fatty acid conversion reduced methane production. This study explores utilization lignin-based hydrochar (LHC) carbon quantum dots (CQDs) produced via hydrothermal carbonization alkali lignin alleviate ammonia in AD processes. The results showed that both LHC CQDs help counter decline yield production rate typically associated with inhibition. Notably, addition 1 g/L significantly increased 24.25% compared control group. While limited adsorption, its primary impact was enhancing direct interspecies electron transfer (DIET) through improved redox capacity promoting humic acid-like organics formation. In contrast, charge resistance, system capacity. Optimizing temperature 250 °C further optimized properties, boosting 30.53% at concentration 3 g/L. Microbial community metabolic pathway analyses indicated enriched hydrolytic acidifying bacteria, as well DIET-associated microorganisms, facilitating conversion. process enabled sustained acetoclastic hydrogenotrophic methanogenic pathways, effectively mitigating adverse effects high nitrogen concentrations. Graphical

Язык: Английский

Mitigating ammonia inhibition in anaerobic digestion with lignin-based carbon materials synthesized by hydrothermal carbonization DOI Creative Commons
Shuaishuai Ma, Hongliang Wang, Xin Gao

и другие.

Carbon Research, Год журнала: 2025, Номер 4(1)

Опубликована: Фев. 4, 2025

Abstract Ammonia inhibition poses a significant challenge to the efficient and stable operation of anaerobic digestion (AD) systems by leading volatile fatty acid conversion reduced methane production. This study explores utilization lignin-based hydrochar (LHC) carbon quantum dots (CQDs) produced via hydrothermal carbonization alkali lignin alleviate ammonia in AD processes. The results showed that both LHC CQDs help counter decline yield production rate typically associated with inhibition. Notably, addition 1 g/L significantly increased 24.25% compared control group. While limited adsorption, its primary impact was enhancing direct interspecies electron transfer (DIET) through improved redox capacity promoting humic acid-like organics formation. In contrast, charge resistance, system capacity. Optimizing temperature 250 °C further optimized properties, boosting 30.53% at concentration 3 g/L. Microbial community metabolic pathway analyses indicated enriched hydrolytic acidifying bacteria, as well DIET-associated microorganisms, facilitating conversion. process enabled sustained acetoclastic hydrogenotrophic methanogenic pathways, effectively mitigating adverse effects high nitrogen concentrations. Graphical

Язык: Английский

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