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Long term testing of Microbial Fuel Cells: Comparison of different anode materials
D Hidalgo1, T Tommasi2, K Velayutham3
1Center for Sustainable Futures, Istituto Italiano di Tecnologia, C.so Trento 21, 10129 Torino, Italy; Applied Science and Technology Department, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy.
Carbon-coated Berl saddles (C-SADDLES) demonstrated superior long-term performance in microbial fuel cells (MFCs) compared to carbon felt (C-FELT) and polyaniline-deposited carbon felt (C-PANI) anodes. C-SADDLES maintained optimal biocompatibility and conductivity for sustained power generation.
Area of Science:
- Environmental Science
- Electrochemistry
- Microbiology
Background:
- Microbial Fuel Cells (MFCs) offer a sustainable energy solution.
- Anode material selection is critical for MFC performance and longevity.
- Evaluating long-term operational stability of different anode materials is essential.
Purpose of the Study:
- To assess the long-term performance of three distinct anode materials in MFCs.
- To compare power generation and electrical energy output across different anode types.
- To investigate the stability and microbial interactions affecting anode performance over time.
Main Methods:
- Three anode materials were tested: commercial carbon felt (C-FELT), polyaniline-deposited carbon felt (C-PANI), and carbon-coated Berl saddles (C-SADDLES).
- MFCs were operated for four months using seawater microbial consortium and acetate as substrate under a 1000Ω external load.
- Power density, energy production, and material stability were evaluated.
Main Results:
- Carbon-coated Berl saddles (C-SADDLES) achieved the highest power generation (102mWm⁻²) and electrical energy production (2222J).
- C-FELT and C-PANI showed lower but comparable energy production.
- C-PANI performance declined over time due to polyaniline degradation by microbial activity.
Conclusions:
- The three-dimensional structure of C-SADDLES provides excellent biocompatibility, high surface area, and conductivity for MFCs.
- C-SADDLES demonstrate superior long-term stability and performance compared to C-FELT and C-PANI.
- Anode material choice significantly impacts MFC longevity and power output.
