Crystal Violet (CV) Biodegradation Study in a Dual-Chamber Fungal Microbial Fuel Cell with Trichoderma harzianum

Sébastien Votat, Maxime Pontié (), Emmanuel Jaspard and Laurent Lebrun
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Sébastien Votat: Normandie Université, Université Rouen Normandie, CNRS UMR 6270, Polymères, Biopolymères, Surfaces, 76821 Mont Saint-Aignan, France
Maxime Pontié: Group of Analysis and Processes (GA&P), Department of Chemistry, University of Angers, 2 Bd. A. de Lavoisier, 49045 Angers, France
Emmanuel Jaspard: Department of Biology, University of Angers, 2 Bd. A. de Lavoisier, 49045 Angers, France
Laurent Lebrun: Normandie Université, Université Rouen Normandie, CNRS UMR 6270, Polymères, Biopolymères, Surfaces, 76821 Mont Saint-Aignan, France

Energies, 2024, vol. 17, issue 1, 1-22

Abstract: In the present study, CV dye, known as a recalcitrant dye, was tested for bioremediation via Trichoderma harzianum in a dual-chambered MFC for the first time. Two types of carbon clothes, KIP and CSV from the Dacarb company (France), were tested as electrodes and supported for fungi growth. We first observed that 52% and 55% of the CV were removed by the MFC using KIP and CSV anodes, respectively. The incomplete removal of VC was explained by the relative toxicity of VC to T. harzianum and correlated with IC 50 determined as 0.97 ± 0.28 mg L −1 at 25 °C. Furthermore, the MFC working with the KIP electrode was more efficient with a higher maximum power density of 1096 mW m −3 and was only 14.1 mW m −3 for CSV. The MFC experiments conducted on KIP without the T. harzianum biofilm exhibited significantly lower potential and power density values, which proves the electrocatalytic effect of this fungus. These results provide new insight into the development of an effective MFC system capable of direct energy generation and, at the same time, promoting the bioremediation of the persistent CV pollutant.

Keywords: microbial fuel cell; violet crystal; fungi; Trichoderma harzianum; biodegradation; IC 50 (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: 2024
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