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Energies 2018, 11(3), 529; https://doi.org/10.3390/en11030529

Polarization Potential Has No Effect on Maximum Current Density Produced by Halotolerant Bioanodes

1
Energía Renovable, Centro de Investigación Científica de Yucatán (CICY), Km 5 Carretera Sierra Papacal-Chuburná Puerto, Yucatán 97302, Mexico
2
Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium
3
Departamento de Recursos del Mar, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-Mérida), Km 6 Antigua Carretera a Progreso, Yucatán 97310, Mexico
4
Departamento de Microbiología Ambiental y Biotecnología, Universidad Autónoma de Campeche (UACAM), Av. Agustín Melgar S/N, Col. Buenavista, Campeche 24039, Mexico
*
Author to whom correspondence should be addressed.
Received: 7 December 2017 / Revised: 10 February 2018 / Accepted: 23 February 2018 / Published: 1 March 2018
(This article belongs to the Collection Bioenergy and Biofuel)
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Abstract

Halotolerant bioanodes are considered an attractive alternative in microbial electrochemical systems, as they can operate under higher conductive electrolytes, in comparison with traditional wastewater and freshwater bioanodes. The dependency between energetic performance and polarization potential has been addressed in several works; however the vast majority discusses its effect when wastewater or freshwater inocula are employed, and fewer reports focus on inocula from highly-saline environments. Moreover, the effect of the polarization potential on current production is not fully understood. To determine if the polarization potential has a significant effect on current production, eight bioanodes were grown by chronoamperometry at positive and negative potentials relative to the reference electrode (+0.34 V/SHE and −0.16 V/SHE), in a three-electrode set-up employing sediments from a hyperhaline coastal lagoon. The maximum current density obtained was the same, despite the differences in the applied potential. Our findings indicate that even if differences in organic matter removal and coulombic efficiency are obtained, the polarization potential had no statistically significant effect on overall current density production. View Full-Text
Keywords: polarization potential; halotolerant bioanodes; microbial electrochemical systems polarization potential; halotolerant bioanodes; microbial electrochemical systems
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González-Muñoz, M.; Dominguez-Benetton, X.; Domínguez-Maldonado, J.; Valdés-Lozano, D.; Pacheco-Catalán, D.; Ortega-Morales, O.; Alzate-Gaviria, L. Polarization Potential Has No Effect on Maximum Current Density Produced by Halotolerant Bioanodes. Energies 2018, 11, 529.

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