title: Tracking bio-hydrogen-mediated production of commodity chemicals from carbon dioxide and renewable electricity.
abstract: This study reveals that reduction of carbon dioxide (CO2) to commodity chemicals can be functionally compartmentalized in bioelectrochemical systems. In the present example, a syntrophic consortium composed by H2-producers (Rhodobacter sp.) in the biofilm is combined with carboxidotrophic Clostridium species, mainly found in the bulk liquid. The performance of these H2-mediated electricity-driven systems could be tracked by the activity of a biological H2sensory protein identified at cathode potentials between -0.2V and -0.3V vs SHE. This seems to point out that such signal is not strain specific, but could be detected in any organism containing hydrogenases. Thus, the findings of this work open the door to the development of a biosensor application or soft sensors for monitoring such systems.
authors.affiliation: LEQUIA, Institute of the Environment, University of Girona, Campus de Montilivi, Carrer Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain. Electronic address: sebastia@lequia.udg.cat.
authors.forename: Sebastià
authors.initials: S
authors.lastname: Puig
authors.affiliation: LEQUIA, Institute of the Environment, University of Girona, Campus de Montilivi, Carrer Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain; Centre of Microbial Ecology and Technology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
authors.forename: Ramon
authors.initials: R
authors.lastname: Ganigué
authors.affiliation: LEQUIA, Institute of the Environment, University of Girona, Campus de Montilivi, Carrer Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain; Department of Innovation and Technology, FCC Aqualia, Balmes Street, 36, 6th Floor, 08007 Barcelona, Spain.
authors.forename: Pau
authors.initials: P
authors.lastname: Batlle-Vilanova
authors.affiliation: LEQUIA, Institute of the Environment, University of Girona, Campus de Montilivi, Carrer Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain.
authors.forename: M Dolors
authors.initials: MD
authors.lastname: Balaguer
authors.affiliation: Molecular Microbial Ecology Group, Institute of Aquatic Ecology, University of Girona, E-17071 Girona, Spain.
authors.forename: Lluís
authors.initials: L
authors.lastname: Bañeras
authors.affiliation: LEQUIA, Institute of the Environment, University of Girona, Campus de Montilivi, Carrer Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain.
authors.forename: Jesús
authors.initials: J
authors.lastname: Colprim
mesh_terms: D018441:Biofilms; D019149:Bioreactors / Q000382:microbiology*; D002245:Carbon Dioxide / Q000378:metabolism*; D003013:Clostridium / Q000378:metabolism; D004560:Electricity; D006864:Hydrogenase / Q000378:metabolism; D016992:Rhodobacter
chemical_list: D002245:Carbon Dioxide; D006864:Hydrogenase
keywords: Bioelectrochemical systems; Biofuels; CO(2) transformation; White biotechnology