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A microbial fuel cell (MFC) was used to remove metal ions from artificial wastewater and generate electricity, achieving a power density of 3.164 mW/m² and removal efficiencies of 83.67-95.99% for various metals.

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Representative MFC — matched on the paper’s system type only, not its reactor or geometry.

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Reported parameters

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What they did

System
MFC

What worked

Power density3.16mW/m²best of 3

Abstract

Microbial fuel cell (MFC) is a new and interesting technology that can be used to treat wastewater without using electricity. The current research focuses on electron generation, which is one of the technique’s major challenges. According to the latest literature, the study was planned to successfully remove the metals from artificial wastewater at high concentrations and generate electricity. On average, after 18 days of operation, it offered 610 mV with 1000 ῼ constant external resistance. The internal resistance was found to be 520 ῼ. The achieved power density was 3.164 mW/m² at an external resistance of 1000 ῼ. The achieved removal efficiencies of Pb2+, Cd2+, Cr3+, and Ni2+ were 83.67%, 84.10%, 84.55%, and 95.99%, respectively. The operation lasted for 25 days. The cyclic voltameter studies show that there is a gradual oxidation rate of organic substances, while on day 25, the removal efficiency reached its maximum. The specific capacitance was found to be high between days 15 and 20, i.e., 0.0000540 F/g. It also indicated that biofilm was stable around day 18. Furthermore, the biological characterization also demonstrated that MFC operation was very smooth throughout the process, even at high concentrations (100 mg/L) of metal ions. Finally, there is the MFC method, as well as some new challenges and future recommendations.

Key findings

  • The MFC generated 610 mV with 1000 Ω constant external resistance and an internal resistance of 520 Ω.
  • The removal efficiencies of Pb2+, Cd2+, Cr3+, and Ni2+ were 83.67%, 84.10%, 84.55%, and 95.99%, respectively.
  • The specific capacitance was high between days 15 and 20, indicating a stable biofilm around day 18.

Keywords

Microbial fuel cellBiomass (ecology)Palm oilPulp and paper industryElectricityMetal ions in aqueous solution

Identifiers

DOI
10.1155/2024/5570011
Journal
Journal of Chemistry
Year
2024