Journal
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
Volume 93, Issue 5, Pages 1290-1299Publisher
WILEY
DOI: 10.1002/jctb.5488
Keywords
microbial fuel cell; sludge age; electrogenic bacteria; biofilm; illumina
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Funding
- AEI (Agencia Estatal de Investigacion) of the Spanish Ministry of Economy and Competitiveness (MINECO) from the Spanish Ministry of Education, Culture and Sport through Sara Mateo's grant [CTQ2013-49748-EXP, FPU 13/04118]
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BACKGROUNDThis work is focused on the assessment of the performance of mini-scale air-breathing microbial fuel cells (MFCs), by monitoring the evolution of the bio-electrogenic activity for a period of 40 days and by comparing the microorganisms populations developed in each of the MFCs after this period. RESULTSFive MFCs were operated at sludge ages ranging from 1.4 to 10.0 days. Results showed the superb performance of the MFC operating under a sludge age of 2.5 days. Desulfuromonas, Syntrophothermus, Solitalea, Acholeplasma, Propionicimonas, Desulfobacula and Sphaerochaeta are proposed as potentially responsible for the bio-electrogenic activity. CONCLUSIONSMicrobial population analysis through Illumina amplicon sequencing demonstrated that despite all MFCs being seeded with the same mixed culture inoculum, the biological cultures developed in the suspension and the biofilm are completely different and depend strongly on sludge age. (c) 2017 Society of Chemical Industry
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