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Título
Reduced graphene oxide improves the performance of a methanogenic biocathode
Autor
Facultad/Centro
Área de conocimiento
Título de la revista
Fuel
Editorial
Elsevier
Fecha
2022
ISSN
0016-2361
Resumen
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
Materia
Palabras clave
Peer review
SI
ID proyecto
- PID2020-115948RB-I00-TMA / AEI / 10.13039/501100011033,EREN_2019_L3_ULE
URI
DOI
Versión del editor
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