Journal
JOURNAL OF BASIC MICROBIOLOGY
Volume 60, Issue 7, Pages 562-573Publisher
WILEY
DOI: 10.1002/jobm.202000042
Keywords
biocatalytic coculture; bioelectrochemical behaviour; electron transfer rate; exoelectrogens; microbial fuel cell
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Funding
- Department of Science and Technology, New Delhi, India [SR/WOS-A/ET-1054/2014(G)]
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Bacterial isolates Pseudomonas aeruginosa BR, Alcaligenes faecalis SW and Escherichia coli EC from a microbial fuel cell (MFC) were cocultured with each other. The isolates were added in a specific sequence one after the other (two cultures in one reactor). The study helped us conceptualise the synergistic and antagonistic behaviour of bacterial isolates and also emphasised the sequence in which a culture can be introduced in an anode chamber. The coculture conditions were evaluated on the basis of redox activity, electron transfer rate, columbic efficiency, and internal resistances. A good syntropy in terms of power production was found between P. aeruginosa BR and E. coli EC that recorded a power generation of 207.593 +/- 1.705 mu W/m(2). The addition of any culture in any sequence affected the performance of P. aeruginosa BR. This culture when added as a secondary culture in the reactor enhanced the performance of that reactor. The sequence of addition of a culture in a reactor affected the performance in the combinations of (a) P. aeruginosa BR and A. faecalis SW and (b) A. faecalis SW and E. coli EC.
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