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

Muriel González-Muñoz, Xochitl Dominguez-Benetton, Jorge Domínguez-Maldonado, David Valdés-Lozano, Daniella Pacheco-Catalán, Otto Ortega-Morales and Liliana Alzate-Gaviria
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Muriel González-Muñoz: Energía Renovable, Centro de Investigación Científica de Yucatán (CICY), Km 5 Carretera Sierra Papacal-Chuburná Puerto, Yucatán 97302, Mexico
Xochitl Dominguez-Benetton: Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium
Jorge Domínguez-Maldonado: Energía Renovable, Centro de Investigación Científica de Yucatán (CICY), Km 5 Carretera Sierra Papacal-Chuburná Puerto, Yucatán 97302, Mexico
David Valdés-Lozano: 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
Daniella Pacheco-Catalán: Energía Renovable, Centro de Investigación Científica de Yucatán (CICY), Km 5 Carretera Sierra Papacal-Chuburná Puerto, Yucatán 97302, Mexico
Otto Ortega-Morales: Departamento de Microbiología Ambiental y Biotecnología, Universidad Autónoma de Campeche (UACAM), Av. Agustín Melgar S/N, Col. Buenavista, Campeche 24039, Mexico
Liliana Alzate-Gaviria: Energía Renovable, Centro de Investigación Científica de Yucatán (CICY), Km 5 Carretera Sierra Papacal-Chuburná Puerto, Yucatán 97302, Mexico

Energies, 2018, vol. 11, issue 3, 1-13

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.

Keywords: polarization potential; halotolerant bioanodes; microbial electrochemical systems (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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