title: Performance of different Sporomusa species for the microbial electrosynthesis of acetate from carbon dioxide.
abstract: Sporomusa ovata DSM-2662 produces high rate of acetate during microbial electrosynthesis (MES) by reducing CO2with electrons coming from a cathode. Here, we investigated other Sporomusa for MES with cathode potential set at -690mVvsSHE to establish if this capacity is conserved among this genus and to identify more performant strains. S. ovata DSM-2663 produced acetate 1.8-fold faster than S. ovata DSM-2662. On the contrary, S. ovata DSM-3300 was 2.7-fold slower whereas Sporomusa aerivorans had no MES activity. These results indicate that MES performance varies among Sporomusa. During MES, electron transfer from cathode to microbes often occurs via H2. To establish if efficient coupling between H2oxidation and CO2reduction may explain why specific acetogens are more productive MES catalysts, the metabolisms of the investigated Sporomusa were characterized under H2:CO2. Results suggest that other phenotypic traits besides the capacity to oxidize H2efficiently are involved.
authors.affiliation: The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kgs. Lyngby, Denmark.
authors.forename: Nabin
authors.initials: N
authors.lastname: Aryal
authors.affiliation: School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, PR China.
authors.forename: Pier-Luc
authors.initials: PL
authors.lastname: Tremblay
authors.affiliation: The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kgs. Lyngby, Denmark.
authors.forename: Dawid M
authors.initials: DM
authors.lastname: Lizak
authors.affiliation: The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kgs. Lyngby, Denmark; School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, PR China. Electronic address: zhang@biosustain.dtu.dk.
authors.forename: Tian
authors.initials: T
authors.lastname: Zhang
mesh_terms: D000085:Acetates / Q000378:metabolism; D002245:Carbon Dioxide / Q000378:metabolism*; D004566:Electrodes; D010084:Oxidation-Reduction; D045854:Veillonellaceae
chemical_list: D000085:Acetates; D002245:Carbon Dioxide
keywords: Acetate; H(2) oxidation; Microbial catalyst; Microbial electrosynthesis; Sporomusa