RT info:eu-repo/semantics/article
T1 Electromethanogenesis at medium-low temperatures: Impact on performance and sources of variability
A1 Pelaz Guerra, Guillermo
A1 Carrillo Peña, Daniela Andrea
A1 Morán Palao, Antonio
A1 Escapa González, Adrián
A2 Ingenieria Electrica
K1 Ingeniería química
K1 Bioelectrochemical system
K1 Electromethanogenesis
K1 Low temperature
K1 Biogas
K1 Biocathode
K1 3303 Ingeniería y Tecnología Químicas
K1 3306 Ingeniería y Tecnología Eléctricas
AB [EN] In this study we aimed to understand the impact of medium–low temperatures on the two main steps that usually comprise the electromethanogenesis (EM) process: electrothrophic hydrogenesis and hydrogenothrophic methanogenesis. Results revealed that pure CO2 could effectively be converted into a high-purity biogas (∼90:10 CH4/CO2) at 30 °C. However, when temperature was reduced to 15 °C, methane richness greatly decreased (∼40:60 CH4/CO2). This deterioration in performance was mostly attributed to a decline in methanogenic activity (represented mainly by Methanobacterium and Methanobrevibacter). In contrast, the hydrogenic activity (mostly Desulfomicrobium) did not suffer any significant decay. Results also seemed to indicate that methanogenesis, rather than hydrogenesis, is the main source of variability in EM. Increasing the temperature again to 30 °C restored previous performance, which highlights the resilience of EM to wide temperature fluctuations (from 30 to 15 and back 30 °C).
PB Elsevier
SN 0016-2361
LK http://hdl.handle.net/10612/14445
UL http://hdl.handle.net/10612/14445
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 25-abr-2024