Sorry, you need to enable JavaScript to visit this website.

Bioelectrochemical reduction of CO2 to CH4 via direct and indirect extracellular electron transfer by a hydrogenophilic methanogenic culture

TitoloBioelectrochemical reduction of CO2 to CH4 via direct and indirect extracellular electron transfer by a hydrogenophilic methanogenic culture
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2010
AutoriVillano, M., Aulenta F., Ciucci C., Ferri T., Giuliano Antonio, and Majone M.
RivistaBioresource Technology
Volume101
Paginazione3085-3090
ISSN09608524
Parole chiavearticle, Bacteria, Biocathodes, Biodegradation, Bioelectrochemical systems, Carbon dioxide, Cathode potential, chemical modification, controlled study, cyclic potentiometry, Cyclic voltammetry, electrochemical analysis, Electrochemical Techniques, electrode, Electron transitions, electron transport, Electron-capture efficiency, Electrons, Environmental, experimental study, Extracellular electron transfer, Extracellular Space, Feature extraction, Fluid, High rate, Hydrogen, Hydrogen gas, Hydrogenophilaceae, methane, Methane production, methanogenesis, methanogenic bacterium, Methanogenic cultures, methanogenic fermentation, nonhuman, Organic substrate, oxidation, oxidation reduction reaction, Potentiostatics, priority journal, Reduction, Relative contribution, Waste disposal, waste water management, Water Purification
Abstract

This study describes the performance of a microbial biocathode, based on a hydrogenophilic methanogenic culture, capable of reducing carbon dioxide to methane, at high rates (up to 0.055 ± 0.002 mmol d-1 mgVSS-1) and electron capture efficiencies (over 80%). Methane was produced, at potentials more negative than -650 mV vs. SHE, both via abiotically produced hydrogen gas (i.e., via hydrogenophilic methanogenesis) and via direct extracellular electron transfer. The relative contribution of these two mechanisms was highly dependent on the set cathode potential. Both cyclic voltammetry tests and batch potentiostatic experiments indicated that the capacity for extracellular electron transfer was a constitutive trait of the hydrogenophilic methanogenic culture. In principle, both electrons and carbon dioxide required for methane production could be obtained from a bioanode carrying out the oxidation of waste organic substrates. © 2009 Elsevier Ltd. All rights reserved.

Note

cited By 173

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-74649087256&doi=10.1016%2fj.biortech.2009.12.077&partnerID=40&md5=9dec9966012271353235438203e21e71
DOI10.1016/j.biortech.2009.12.077
Citation KeyVillano20103085