Journal
BIOELECTROCHEMISTRY
Volume 126, Issue -, Pages 105-112Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.bioelechem.2018.11.007
Keywords
Biosensor; Environmental monitoring; MFC; MEC; Pollutant detection; Real-time measurements
Funding
- Petroleum Trust Development Fund of Nigeria through the Presidential Scholarship Program
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This study compares the biosensing performance of a microbial fuel cell (MFC) and a microbial electrolysis cell (MEC). Initial tests provided a qualitative comparison of MFC and MEC currents after the anode compartment liquid (anolyte) was spiked with acetate, or sulphates of NH4+, Na+, Mg2+, Fe2+, or a fertilizer solution. Current measurements showed that the MFC sensor had a faster response time, higher sensitivity, and faster recovery time after the spike. Following the spike tests, the MFC and MEC were operated in a continuous flow mode at several influent concentrations of acetate, and sulphates of NH4+, Na+, and Fe2+. The continuous flow tests confirmed the better performance of the MFC sensor, which was selected for further experiments. Two MFC sensors were used for real-time (on-line) COD measurements of brewery wastewater. Regression analysis showed a strong correlation between the MFC power output and COD concentrations in the anode compartment with a coefficient of determination (R-2) of 0.97. Overall, results of this study suggest that an MFC-based sensor can be successfully used as a simple and cost-efficient real-time monitoring tool. (C) 2018 Published by Elsevier B.V.
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