Datum
2024-03-06Schlagwort
500 Naturwissenschaften 570 Biowissenschaften, Biologie BiomassePflanzenkohleGräserKohlenstoffPufferkapazitätSequestrierungMetadata
Zur Langanzeige
Aufsatz
Interreg NWE Project Three C (NWE1010); Interreg NWE Project RE-DIRECT (NWE294)
Improving acid-stressed anaerobic digestion processes with biochar towards a combined biomass and carbon management system
Zusammenfassung
Interest in biochar as an additive to enhance anaerobic digestion (AD) has grown in the context of biomass cascading use and the 2050 net-zero goal. However, few studies have investigated the effects of biochar on AD from a biochar production perspective, including biomass feedstocks and pyrolysis temperatures. To valorise biomass and better understand the mechanisms and environmental implications of using biochar in AD, this study investigated the effects of distinct biochar types on AD under acid stress-induced process inhibition using batch tests. The results demonstrated that biochar can mitigate acid stress and enhance the methane production rate. The kinetic rate constant of methane production is positively related to the buffer capacity of the tested biochars (R2=0.88). The choice of feedstocks is a crucial factor (P=0.003), particularly the best-performing biochars derived from raw grass silage. In contrast, the pyrolysis temperature effect was less significant (P=0.18). Furthermore, the analysis of biochar indicates that the alkali (K) and alkaline earth (Ca,Mg) metals contained in biochar may be one of the important factors contributing to buffer capacity (R2=0.82 to 0.86). Hence, buffer capacity is a crucial quality criteria when evaluating biochar for AD applications. Raw grass silage biochars are promising for acid stress mitigation due to their high buffer capacity, while carbon-rich woody biochars have highCO2 sequestration potential. A compromise between mitigating acid stress and sequestering carbon is the use of pre-treated grass biochar. Overall, the use of biochar-enriched digestate offers a potential way to close material loops and complete the biomass-to-biochar value chain.
Zitierform
In: Environmental Research Communications Volume 6 / Number 3 (2024-03-06) eissn:2515-7620Förderhinweis
Gefördert im Rahmen des Projekts DEALInterreg NWE Project Three C (NWE1010); Interreg NWE Project RE-DIRECT (NWE294)
Zitieren
@article{doi:10.17170/kobra-2024062810432,
author={Hu, Jiahui and Wachendorf, Michael and Gwenzi, Willis and Joseph, Ben and Stenchly, Kathrin and Kaetzl, Korbinian},
title={Improving acid-stressed anaerobic digestion processes with biochar towards a combined biomass and carbon management system},
journal={Environmental Research Communications},
year={2024}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2024$n2024 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/15887 3000 Hu, Jiahui 3010 Wachendorf, Michael 3010 Gwenzi, Willis 3010 Joseph, Ben 3010 Stenchly, Kathrin 3010 Kaetzl, Korbinian 4000 Improving acid-stressed anaerobic digestion processes with biochar towards a combined biomass and carbon management system / Hu, Jiahui 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/15887=x R 4204 \$dAufsatz 4170 5550 {{Biomasse}} 5550 {{Pflanzenkohle}} 5550 {{Gräser}} 5550 {{Kohlenstoff}} 5550 {{Pufferkapazität}} 5550 {{Sequestrierung}} 7136 ##0##http://hdl.handle.net/123456789/15887
2024-06-28T12:06:04Z 2024-06-28T12:06:04Z 2024-03-06 doi:10.17170/kobra-2024062810432 http://hdl.handle.net/123456789/15887 Gefördert im Rahmen des Projekts DEAL Interreg NWE Project Three C (NWE1010); Interreg NWE Project RE-DIRECT (NWE294) eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ AAEMs buffer capacity carbon sequestration grass-type biomass kinetic rate constants VFA accumulations 500 570 Improving acid-stressed anaerobic digestion processes with biochar towards a combined biomass and carbon management system Aufsatz Interest in biochar as an additive to enhance anaerobic digestion (AD) has grown in the context of biomass cascading use and the 2050 net-zero goal. However, few studies have investigated the effects of biochar on AD from a biochar production perspective, including biomass feedstocks and pyrolysis temperatures. To valorise biomass and better understand the mechanisms and environmental implications of using biochar in AD, this study investigated the effects of distinct biochar types on AD under acid stress-induced process inhibition using batch tests. The results demonstrated that biochar can mitigate acid stress and enhance the methane production rate. The kinetic rate constant of methane production is positively related to the buffer capacity of the tested biochars (R2=0.88). The choice of feedstocks is a crucial factor (P=0.003), particularly the best-performing biochars derived from raw grass silage. In contrast, the pyrolysis temperature effect was less significant (P=0.18). Furthermore, the analysis of biochar indicates that the alkali (K) and alkaline earth (Ca,Mg) metals contained in biochar may be one of the important factors contributing to buffer capacity (R2=0.82 to 0.86). Hence, buffer capacity is a crucial quality criteria when evaluating biochar for AD applications. Raw grass silage biochars are promising for acid stress mitigation due to their high buffer capacity, while carbon-rich woody biochars have highCO2 sequestration potential. A compromise between mitigating acid stress and sequestering carbon is the use of pre-treated grass biochar. Overall, the use of biochar-enriched digestate offers a potential way to close material loops and complete the biomass-to-biochar value chain. open access Hu, Jiahui Wachendorf, Michael Gwenzi, Willis Joseph, Ben Stenchly, Kathrin Kaetzl, Korbinian doi:10.1088/2515-7620/ad2bb7 NWE294 Biomasse Pflanzenkohle Gräser Kohlenstoff Pufferkapazität Sequestrierung publishedVersion eissn:2515-7620 Number 3 Environmental Research Communications Volume 6 false
Die folgenden Lizenzbestimmungen sind mit dieser Ressource verbunden:
:Namensnennung 4.0 International