High shear enrichment improves the performance of the anodophilic microbial consortium in a microbial fuel cell.
Bottom Line: In many microbial bioreactors, high shear rates result in strong attachment of microbes and dense biofilms.The microbial community of the former, as analysed by DGGE, was significantly different from that of the latter.The results showed that enrichment by applying high shear rates in an MFC can result in a specific electrochemically active biofilm that is thicker and denser and attaches better, and hence has a better performance.
Affiliation: Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Ghent, Belgium.Show MeSH
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Mentions: The DGGE and sequencing analysis of the bacterial communities showed that the anodic microbial community of the high shear enriched MFC was very different from that of the low shear enriched MFC (Fig. 5), although both had some abundantly present species in common: Phyllobacterium and Pseudomonas sp. (corresponding to bands 6 and 7). Some species (corresponding to bands 1, 8–11, especially) were only dominant in the community of the high shear enriched MFC, not in the community of the low shear enriched MFC and vice versa. Interestingly, most of characteristic dominant species of the community of the high shear enriched MFC only showed very low sequence homology (< 96%) even though the sequence length was short (200 bp). On the contrary, most of dominant species of the community of the low shear enriched MFC could be determined as known bacteria (with blast sequence homology > 96%).
Affiliation: Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Ghent, Belgium.