RT info:eu-repo/semantics/article
T1 Reduced graphene oxide improves the performance of a methanogenic biocathode
A1 Carrillo Peña, Daniela Andrea
A1 Mateos González, Raúl
A1 Morán Palao, Antonio
A1 Escapa González, Adrián
A2 Ingenieria Electrica
K1 Ingeniería mecánica
K1 Ingeniería química
K1 Biocathode
K1 Carbon dioxide
K1 Electromethanogenesis
K1 Graphene oxide
K1 Microbial electrosynthesis
K1 3303 Ingeniería y Tecnología Químicas
K1 3313 Tecnología E Ingeniería Mecánicas
K1 3306 Ingeniería y Tecnología Eléctricas
AB Microbial electrosynthesis (MES), a sub-branch of bioelectrochemical processes, takes advantage of a certain type of electroactive microorganism to produce added value products (such as methane) from carbon dioxide (CO2). The aim of this study is to quantify the benefits of using a carbon felt electrode modified with reduced graphene-oxide (rgoCF) as a methanogenic biocathode. The current density generated by the rgoCF was almost 30% higher than in the control carbon felt electrode (CF). In addition, charge transfer and ohmic resistances were, on average, 50% lower in the rgoCF electrode. These improvements were accompanied by a larger presence of bacteria (31% larger) and archaea (18% larger) in the rgoCF electrode. The microbial communities were dominated by hydrogenotrophic methanogenic archaea (Methanobacterium) and, to a lesser extent, by a low-diversity group of bacteria in both biocathodes. Finally, it was estimated that for a CO2 feeding rate in the range 15–30 g CO2 per m2 of electrode per day, it is possible to produce a high-quality biogas (>95% methane concentration
PB Elsevier
SN 0016-2361
LK http://hdl.handle.net/10612/14528
UL http://hdl.handle.net/10612/14528
NO .
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 19-abr-2024