MESSAI.iO

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This MFC study Abstract Bio-electrochemical Systems (BES), particularly Microbial Fuel Cells (MFC), have emerged as promising technologies in environmental biotechnology. This study focused on optimizing the anode bacterial culture immobilization process to enhance BES performance.

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Representative dual-chamber H-cell — matched on the paper’s reported configuration, not its exact geometry.

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What they did

System
MFC
Substrate
pure compound
Inoculum
mixed culture of pseudomonas aeruginosa and shewanella putrefaciens

What worked

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Abstract

Abstract Bio-electrochemical Systems (BES), particularly Microbial Fuel Cells (MFC), have emerged as promising technologies in environmental biotechnology. This study focused on optimizing the anode bacterial culture immobilization process to enhance BES performance. The investigation combines and modifies two key immobilization methods: covalent bonding with glutaraldehyde and inclusion in a chitosan gel in order to meet the criteria and requirements of the bio-anodes in MFC. The performance of MFCs with immobilized and suspended cultures was compared in parallel experiments. Both types showed similar substrate utilization dynamics with slight advantage of the immobilized bio-anode considering the lower concentration of biomass. The immobilized MFC exhibited higher power generation and metabolic activity, as well. Probably, this is due to improved anodic respiration and higher coulombic efficiency of the reactor. Analysis of organic acids content supported this conclusion showing significant inhibition of the fermentation products production in the MFC reactor with immobilized anode culture.

Key findings

  • Both types showed similar substrate utilization dynamics with slight advantage of the immobilized bio-anode considering the lower concentration of biomass.
  • Probably, this is due to improved anodic respiration and higher coulombic efficiency of the reactor.

Keywords

Microbial fuel cellAnodeBiomass (ecology)GlutaraldehydeSubstrate (aquarium)Chemical engineering

Identifiers

DOI
10.1515/znc-2023-0175
Journal
Zeitschrift für Naturforschung C
Year
2024