Biofilm and planktonic population distribution. Key aspects in carbonaceous anodes for microbial fuel cells
| Autor: | Francisco Jesus Fernandez-Morales, Pablo Cañizares, Sara Mateo, Manuel A. Rodrigo |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Microbial fuel cell
General Chemical Engineering Carbon nanofoam Population chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Shewanella Inorganic Chemistry Mass transfer education Waste Management and Disposal 0105 earth and related environmental sciences education.field_of_study biology Renewable Energy Sustainability and the Environment Chemistry Organic Chemistry Biofilm 021001 nanoscience & nanotechnology biology.organism_classification Pollution Fuel Technology Chemical engineering 0210 nano-technology Carbon Faraday efficiency Biotechnology |
| Zdroj: | Journal of Chemical Technology & Biotechnology. 93:3436-3443 |
| ISSN: | 0268-2575 |
| DOI: | 10.1002/jctb.5701 |
| Popis: | BACKGROUND: A comparison between different carbon‐based anodes used in microbial fuel cells (MFCs) has been carried out. Five different carbonaceous anodes were studied: carbon paper, carbon cloth, carbon foam 30 ppi, carbon foam 80 ppi and carbon felt. RESULTS: The current density generated was higher for the MFCs with porous anodes compared with the flat ones, generating up to 14.5 A m⁻². However, when the superficial surface was higher than 7500 m² m⁻² the performance did not increase further due to microorganisms transport and mass transfer limitations. Regarding the biochemical performance, a linear relationship between the generated current density and the coulombic efficiency was found. This relationship indicates selection of the electrogenic microbial population when the superficial surface increases. From Illumina MiSeq analyses, it was observed that Shewanella population in the biofilm was c. 14%, while its population was negligible in the planktonic culture. This population distribution can be explained by the low growth rate of the Shewanella. CONCLUSIONS: These results demonstrate that the main driving force of the carbonaceous materials performance is the ease of biofilm formation and subsequent population selection, but not on specific electronic properties of the carbon materials. © 2018 Society of Chemical Industry |
| Databáze: | OpenAIRE |
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