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<p>The distillery effluent has the potential for a significant impact on environment and health hazards for humans if it is not adequately treated before it is discharged. Microbial fuel cell (MFC) has evolved as a sustainable technology for bioelectricity generation during effluent treatment. However, the up-flow microbial fuel cell (UF-MFC) has a notable challenge in the form of high internal resistance, which restricts its operational efficiency and practical utility. To enhance the power density (PD), the design incorporates a continuous UF-MFC in which the anode is divided into three regions with baffle plates which can improve the production of electricity using distillery wastewater as a substrate. The experimental results showed that a current of 2.56 ± 0.15&#xa0;mA with a chemical oxygen demand (COD) removal efficiency of 48.1 ± 0.5% was observed at a pH of 8. The PD increased with increasing the COD concentration and attained maximum of 106 ± 3 mW/m<sup>2</sup> and COD removal efficiency of 64 ± 1% for 6244&#xa0;mg /L. Electrochemical impedance spectroscopy (EIS) indicates that lowering the resistance of solution in the electrolyte can enhance ion transport and electrochemical reactions, leading to higher power output and reduced losses. These findings underscore the substantial impact of utilizing distillery wastewater for energy generation in the UF-MFC, highlighting their potential for not only the treatment of wastewater but also for energy production.</p>

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Influence of Operating Parameters on Electricity Production in Up-Flow Microbial Fuel Cell During Distillery Wastewater Treatment

  • 期刊论文

  • 发表日期：

    2025年1月20日

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  • Jayachitra Murugaiyan,
  • Anantharaman Narayanan,
  • Samsudeen Naina Mohamed

摘要

The distillery effluent has the potential for a significant impact on environment and health hazards for humans if it is not adequately treated before it is discharged. Microbial fuel cell (MFC) has evolved as a sustainable technology for bioelectricity generation during effluent treatment. However, the up-flow microbial fuel cell (UF-MFC) has a notable challenge in the form of high internal resistance, which restricts its operational efficiency and practical utility. To enhance the power density (PD), the design incorporates a continuous UF-MFC in which the anode is divided into three regions with baffle plates which can improve the production of electricity using distillery wastewater as a substrate. The experimental results showed that a current of 2.56 ± 0.15 mA with a chemical oxygen demand (COD) removal efficiency of 48.1 ± 0.5% was observed at a pH of 8. The PD increased with increasing the COD concentration and attained maximum of 106 ± 3 mW/m2 and COD removal efficiency of 64 ± 1% for 6244 mg /L. Electrochemical impedance spectroscopy (EIS) indicates that lowering the resistance of solution in the electrolyte can enhance ion transport and electrochemical reactions, leading to higher power output and reduced losses. These findings underscore the substantial impact of utilizing distillery wastewater for energy generation in the UF-MFC, highlighting their potential for not only the treatment of wastewater but also for energy production.