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<p>The microbial biofilms growing on electrodes are utilised to degrade organic matter and generate current in microbial fuel cells (MFC). Although MFCs provide an alternative renewable source of energy, they are plagued by inefficient power production. Anode modification and pre-treatment of the inoculum may overcome this limitation. The effect of pre-treatment of anaerobic sludge inoculum with heat combined with polyaniline (PANI) coating of the anode on MFC was determined in this study. MFC with a modified anode (MFC-T) generated a maximum power density of 65.39 ± 2.00 mW/m<sup>2</sup> compared to the unmodified control (MFC-C), which generate 52 mW/m<sup>2</sup>. Furthermore, MFC-T showed a coulombic efficiency of 30% compared to 19% for MFC-C. Additionally, an oxidative current of 50 ± 1&#xa0;mA was observed for MFC-T, whereas it was restricted to 20 ± 1&#xa0;mA for MFC-C. In addition to the current generation, both MFCs were able to degrade 25&#xa0;mg/L of methylene blue dye within 3&#xa0;h, while the degradation was considerably slower using the anaerobic sludge inoculum alone. These findings highlight the potential for improvement in the current generation of MFCs through modifications of the anode, pre-treatment of the inoculum, and their plausible application in bioremediation.</p>

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Anode Modification with Polyaniline and Inoculum Pretreatment Enhancing Electrogenesis and Methylene Blue Dye Degradation in Microbial Fuel Cell

  • 期刊论文

  • 发表日期：

    2026年5月2日

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  • K. Anakha,
  • T. Arun Kumar,
  • C. Anupama,
  • U. Akhila,
  • R. Leena,
  • D. A. Jadhav,
  • Monali Priyadarshini,
  • P. P. Rajesh

摘要

The microbial biofilms growing on electrodes are utilised to degrade organic matter and generate current in microbial fuel cells (MFC). Although MFCs provide an alternative renewable source of energy, they are plagued by inefficient power production. Anode modification and pre-treatment of the inoculum may overcome this limitation. The effect of pre-treatment of anaerobic sludge inoculum with heat combined with polyaniline (PANI) coating of the anode on MFC was determined in this study. MFC with a modified anode (MFC-T) generated a maximum power density of 65.39 ± 2.00 mW/m2 compared to the unmodified control (MFC-C), which generate 52 mW/m2. Furthermore, MFC-T showed a coulombic efficiency of 30% compared to 19% for MFC-C. Additionally, an oxidative current of 50 ± 1 mA was observed for MFC-T, whereas it was restricted to 20 ± 1 mA for MFC-C. In addition to the current generation, both MFCs were able to degrade 25 mg/L of methylene blue dye within 3 h, while the degradation was considerably slower using the anaerobic sludge inoculum alone. These findings highlight the potential for improvement in the current generation of MFCs through modifications of the anode, pre-treatment of the inoculum, and their plausible application in bioremediation.