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Area of Science:

  • Electrochemistry
  • Environmental Engineering
  • Biotechnology

Background:

  • Microbial fuel cells (MFCs) offer a sustainable method for energy generation and wastewater treatment.
  • Anode design significantly impacts MFC efficiency, often limiting overall performance.
  • 3D printing presents a novel approach to fabricating customized anode architectures.

Purpose of the Study:

  • To investigate the effect of 3D-printed anode pore size on MFC performance.
  • To optimize anode architecture for enhanced electrical energy generation and wastewater treatment.
  • To establish a correlation between anode pore size and MFC efficiency.

Main Methods:

  • Fabrication of conductive anodes with controlled pore sizes using 3D printing.
  • Evaluation of MFCs with different anode pore sizes for power density and coulombic efficiency.
  • Assessment of chemical oxygen demand (COD) removal efficiency and biomass accumulation.
  • Measurement of internal resistance in MFCs with varying anode architectures.

Main Results:

  • Anode with 2.3 mm pore size achieved maximum power density (14.94 mW/m²), coulombic efficiency (4.87%), and biomass (0.186 g).
  • Anode with 1.6 mm pore size yielded maximum COD removal (86.98%), comparable to the 2.3 mm anode (85.77%).
  • The 2.3 mm pore size anode resulted in the lowest internal resistance (1246.44 Ω).

Conclusions:

  • 3D-printed anodes with intermediate pore sizes offer a balanced approach for MFCs.
  • Optimized anode architecture is crucial for maximizing both energy output and pollutant removal.
  • This study demonstrates the potential of tailored 3D-printed anodes for advanced MFC applications.