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Título
Elucidating the impact of power interruptions on microbial electromethanogenesis
Autor
Facultad/Centro
Área de conocimiento
Título de la revista
Applied Energy
Cita Bibliográfica
Pelaz, G., González, R., Morán, A., & Escapa, A. (2023). Elucidating the impact of power interruptions on microbial electromethanogenesis. Applied Energy, 331. https://doi.org/10.1016/J.APENERGY.2022.120382
Editorial
Elsevier
Fecha
2023
ISSN
0306-2619
Resumen
[EN] The need to accommodate power fluctuations intrinsic to high-renewable systems will
demand in the future the implementation of large quantities of energy storage capacity.
Electromethanogenesis (EM) can potentially absorb the excess of renewable energy
and store it as CH4. However, it is still unknown how power fluctuations impact on the
performance of EM systems. In this study, power gaps from 24 to 96 h were applied to
two 0.5 L EM reactors to assess the effect of power interruptions on current density,
methane production and current conversion efficiency. In addition, the cathodes where
operated with and without external H2 supplementation during the power-off periods to
analyse how power outages affect the two main metabolic stages of the EM (i.e.: the
hydrogenic and methanogenic steps).
Methane production rates kept around 1000 mL per m2 of electrode and per day
regardless of the duration of the power interruptions and of the supplementation of
hydrogen. Interestingly, current density increased in the absence of hydrogen
(averaged current density during hydrogen supplementation was 0.36 A·m-2 , increasing
up to 0.58 A·m-2 without hydrogen). However current was less efficiently used in the
production of methane with no hydrogen supplementation. Nevertheless, when the
electrical power was restored after the power interruption experiments, performance
parameters were similar to those observed before. These results indicate that EM is
resilient to power fluctuations, which reinforces the opportunity of using EM as a
technology for renewable energy storage.
Materia
Palabras clave
Peer review
NO
ID proyecto
- info:eu-repo/grantAgreement/AEI/Programa Estatal de I+D+i Orientada a los Retos de la Sociedad/PID2020-115948RB-I00/ES/AVANZANDO HACIA EL USO DE TECNOLOGIAS ELECTROQUIMICAS MICROBIANAS COMO NEXO ENTRE LOS SISTEMAS ENERGETICOS Y LAS INSTALACIONES DE TRATAMIENTO DE RESIDUOS
URI
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