Biofilm structure, dynamics, and ecology of an upscaled biocathode wastewater microbial fuel cell
| Autor: | Matthew D. Yates, Mark Ramirez, Birthe V. Kjellerup, Aaron Leininger |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine chemistry.chemical_classification Microbial fuel cell Bioelectric Energy Sources Chemistry Microbiota Biofilm Bioengineering Wastewater Pulp and paper industry 01 natural sciences Applied Microbiology and Biotechnology 03 medical and health sciences 030104 developmental biology Microbial population biology Microbial ecology Biofilms 010608 biotechnology Organic matter Power output Electrodes Biotechnology Resource recovery |
| Zdroj: | Biotechnology and Bioengineering. 118:1305-1316 |
| ISSN: | 1097-0290 0006-3592 |
| Popis: | A microbial fuel cell (MFC) system containing modular half-submerged biocathode was operated for 6 months in an 800 L flow-through system with domestic wastewater. For the first time, spatial and temporal differences in biofilm communities were examined on large three-dimensional electrodes in a wastewater MFC. Biocathode microbial community analysis showed a specialized biofilm community with electrogenic and electrotrophic taxa forming during operation, suggesting potentially opposing electrode reactions. The anodic community structure shifted during operation, but no spatial differences were observed along the length of the electrode. Power output from the system was most strongly influenced by pH. Higher power densities were associated with the use of solids-dewatering filtrate with increased organic matter, conductivity, and pH. The results show that the biocathode was the rate-limiting step and that future MFC design should consider the effect of size, shape, and orientation of biocathodes on their community assembly and electrotrophic ability. |
| Databáze: | OpenAIRE |
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