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Long-term performance of a microbial electrolysis cell operated with periodic disconnection of power supply

Syed Azfar Hussain, Michel Perrier and Boris Tartakovsky

Article (2018)

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Abstract

This study describes a new approach for achieving stable long-term performance and maximizing the removal of chemical oxygen demand (COD) in a Microbial Electrolysis Cell (MEC). In the proposed approach, the MEC power supply is periodically disconnected, e.g. at a frequency of 0.1–0.5 Hz and a duty cycle of 90–95%. To evaluate the impact of such periodic power supply disconnection (on/off mode) on MEC performance, experiments were carried out in two flow-through MECs with activated granular carbon electrodes. The on/off operating strategy was applied to one MEC, while the other one was operated at a fixed voltage (control MEC). Long-term on/off operation resulted in progressive increase in COD removal efficiency (from 80% to 90%) and MEC current over time, while the control MEC showed stable but inferior performance. Furthermore, by changing the operating strategies and applying the on/off approach to the control MEC, its COD removal was increased from 78% to 83% and internal resistance decreased. The proposed on/off mode of operation can be used to develop a high-rate MEC-based wastewater treatment system.

Subjects: 1800 Chemical engineering > 1800 Chemical engineering
Department: Department of Chemical Engineering
Funders: CRSNG/NSERC
PolyPublie URL: https://publications.polymtl.ca/4943/
Journal Title: RSC Advances (vol. 8, no. 30)
Publisher: The Royal Society of Chemistry
DOI: 10.1039/c8ra01863d
Official URL: https://doi.org/10.1039/c8ra01863d
Date Deposited: 02 Sep 2022 13:49
Last Modified: 08 Jun 2023 09:47
Cite in APA 7: Hussain, S. A., Perrier, M., & Tartakovsky, B. (2018). Long-term performance of a microbial electrolysis cell operated with periodic disconnection of power supply. RSC Advances, 8(30), 16842-16849. https://doi.org/10.1039/c8ra01863d

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