RT info:eu-repo/semantics/article
T1 Electromethanogenesis for the conversion of hydrothermal carbonization exhaust gases into methane
A1 Pelaz Guerra, Guillermo
A1 González-Arias, Judith
A1 Mateos González, Raúl
A1 Escapa González, Adrián
A2 Ingenieria Electrica
K1 Ingeniería de sistemas
K1 Bioelectrochemical systems
K1 Electromethanogenesis
K1 Hydrothermal carbonization
K1 Biocathode
K1 Waste gas
K1 Power-to-gas
AB [EN] Hydrothermal carbonization (HTC) is a biomass conversion process that generates a CO2-rich gaseous phase that is commonly released directly into the atmosphere. Microbial electromethanogeneis (EM) can potentially use this off-gas to convert the residual CO2 into CH4, thus avoiding GHG emissions while adding extra value to the overall bioprocess. In the present work, the HTC gas phase was fed to two mixed-culture biocathodes (replicates) polarized at −1.0V vs. Ag/AgCl. Compared to pure CO2, HTC gas had a marked negative effect on the process, decreasing current density by 61%, while maximum CH₄ yield contracted up to 50%. HTC also had an unequal impact on the cathodic microbial communities, with the methanogenic hydrogenotrophic archaea Methanobacteriaceae experiencing the largest decline. Despite that, the present study demonstrates that HTC can be used in EM as a raw material to produce a biogas with a methane content of up to 70%.
PB Elsevier
SN 0960-1481
LK https://hdl.handle.net/10612/16948
UL https://hdl.handle.net/10612/16948
NO Pelaz, G., González-Arias, J., Mateos, R., y Escapa, A. (2023). Electromethanogenesis for the conversion of hydrothermal carbonization exhaust gases into methane. Renewable Energy, 216(119047), 119047. https://doi.org/10.1016/j.renene.2023.119047
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 21-may-2024