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In microbial fuel cells (MFCs), ceramic membranes are frequently employed as an inexpensive cation exchange membrane (CEM) instead of costly Nafion membranes. In this study in order to create low-cost ceramic membranes for MFCs, sugarcane bagasse ash (SBA) which is rich in silica and alumina was blended with soil. The soil mix was prepared with varying SBA content of 5%, 10%, 15% and 20%. The 15% SBA ceramic membrane showed increased proton mass transfer and decreased oxygen diffusion. Silica and alumina in SBA improved the membrane's ability to retain moisture and facilitated proton movement from the anode to the cathode chamber. The efficacy of the MFCs for the treatment of synthetic wastewater influent under continuous mode operation was evaluated using modified (with SBA, MFCM) and unmodified (without SBA, MFCU) membranes. The MFCM showed volumetric power density of 731 mW/m3 which was higher than 560 mW/m3 produced by MFCU while the chemical oxygen demand (COD) removal efficiencies were 90.7% and 84.4%, respectively. Using the results of the electrochemical impedance spectroscopy (EIS) investigation, internal resistance of MFCM was found to be lower than MFCU.

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Earthen Cation Exchange Membrane Modification with Sugarcane Bagasse Ash for Enhancing Performance of Microbial Fuel Cells

  • 会议论文

  • 发表日期：

    2025年

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  • Soumyadeep Bhaduri,
  • Manaswini Behera

摘要

In microbial fuel cells (MFCs), ceramic membranes are frequently employed as an inexpensive cation exchange membrane (CEM) instead of costly Nafion membranes. In this study in order to create low-cost ceramic membranes for MFCs, sugarcane bagasse ash (SBA) which is rich in silica and alumina was blended with soil. The soil mix was prepared with varying SBA content of 5%, 10%, 15% and 20%. The 15% SBA ceramic membrane showed increased proton mass transfer and decreased oxygen diffusion. Silica and alumina in SBA improved the membrane's ability to retain moisture and facilitated proton movement from the anode to the cathode chamber. The efficacy of the MFCs for the treatment of synthetic wastewater influent under continuous mode operation was evaluated using modified (with SBA, MFCM) and unmodified (without SBA, MFCU) membranes. The MFCM showed volumetric power density of 731 mW/m3 which was higher than 560 mW/m3 produced by MFCU while the chemical oxygen demand (COD) removal efficiencies were 90.7% and 84.4%, respectively. Using the results of the electrochemical impedance spectroscopy (EIS) investigation, internal resistance of MFCM was found to be lower than MFCU.