title: Performance of planar and cylindrical carbon electrodes at sedimentary microbial fuel cells.
abstract: This paper presents data obtained using an indigenous microbial community contained in anaerobic sediments (mud) collected from the shore of the Río de La Plata River (South America). After the sedimentary microbial fuel cells were assembled the evolution of current and power vs. time was studied. Two types of commercially available graphite materials were used as electrodes, which differ mainly in shape and size. In some experiments, an external carbon source (acetate) increased the power generation rate. The maximum power density observed in the aforementioned condition was 19.57 ± 0.35 and 8.72 ± 1.39 mW/m(2) using rod and graphite disk electrodes, respectively. The better performance of the rod electrodes can be explained, at least in part, by an enhanced rate of mass transport by radial diffusion. DGGE fingerprints were used to study the electrogenic community growing over the electrodes.
authors.affiliation: Laboratory of Biosensors and Bioanalysis, Buenos Aires University, Faculty of Science, Department of Biochemistry and IQUIBICEN-CONICET, Pabellón 2, Ciudad Universitaria, Ciudad Autónoma de Buenos Aires C1428EGA, Argentina. nsacco@qb.fcen.uba.ar
authors.forename: Natalia J
authors.initials: NJ
authors.lastname: Sacco
authors.forename: Eva L M
authors.initials: EL
authors.lastname: Figuerola
authors.forename: Gabriela
authors.initials: G
authors.lastname: Pataccini
authors.forename: María Celina
authors.initials: MC
authors.lastname: Bonetto
authors.forename: Leonardo
authors.initials: L
authors.lastname: Erijman
authors.forename: Eduardo
authors.initials: E
authors.lastname: Cortón
mesh_terms: D001419:Bacteria / Q000378:metabolism; D001674:Bioelectric Energy Sources / Q000592:standards*; D018441:Biofilms; D002244:Carbon / Q000737:chemistry*; D058645:Denaturing Gradient Gel Electrophoresis; D004560:Electricity; D004566:Electrodes; D010802:Phylogeny; D013997:Time Factors
chemical_list: D002244:Carbon