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Front Bioeng Biotechnol. 2018 Jun 12;6:78. doi: 10.3389/fbioe.2018.00078. eCollection 2018.

Granular Carbon-Based Electrodes as Cathodes in Methane-Producing Bioelectrochemical Systems.

Frontiers in bioengineering and biotechnology

Dandan Liu, Marta Roca-Puigros, Florian Geppert, Leire Caizán-Juanarena, Susakul P Na Ayudthaya, Cees Buisman, Annemiek Ter Heijne

Affiliations

  1. Sub-Department of Environmental Technology, Wageningen University & Research, Wageningen, Netherlands.
  2. Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT, Oberhausen, Germany.
  3. Laboratory of Microbiology, Wageningen University & Research, Wageningen, Netherlands.

PMID: 29946543 PMCID: PMC6005836 DOI: 10.3389/fbioe.2018.00078

Abstract

Methane-producing bioelectrochemical systems generate methane by using microorganisms to reduce carbon dioxide at the cathode with external electricity supply. This technology provides an innovative approach for renewable electricity conversion and storage. Two key factors that need further attention are production of methane at high rate, and stable performance under intermittent electricity supply. To study these key factors, we have used two electrode materials: granular activated carbon (GAC) and graphite granules (GG). Under galvanostatic control, the biocathodes achieved methane production rates of around 65 L CH

Keywords: bioelectrochemical system (BES); granular carbon-based electrode; intermittent current supply; low cathode overpotential; methane production

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