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Microbial Fuel Cells can treat wastewater and generate energy, with optimal performance at 36 °C and 4.0 gL-1 COD.

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Extraction

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What they did

System
MFC

What worked

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Abstract

Concerns over environmental protection have increased in recent years, leading to a search for new renewable energy sources for minimizing anthropological damage to both atmosphere and water bodies. Microbial Fuel Cells are inserted in such a context, since they can reduce the organic load of an effluent concomitantly with the production of bioelectricity. This study investigated three different sources of microorganisms, evaluating parameters such as carbon source concentration and temperature in energy efficiency. The electrical current generated by microbial activity in the oxidation of organic matter was monitored additionally with ionic conductivity and pH of the medium. Chemical Oxygen Demand was also determined towards an evaluation of the removal of organic matter. The Microbial Fuel Cell inoculated with Activated Sludge showed higher electrical current in comparison to other studies from the literature and a greater generation of electrical current and a high influence of conductivity on that efficiency was observed at 36 °C. As a conclusion, Microbial Fuel Cells can operate at both 4.0 gL-1 (COD mgO2 3,886.728) and 3.0 gL-1 (COD mgO2 3,124.573).

Key findings

  • Higher electrical current generated by Activated Sludge inoculated MFC compared to literature studies.
  • Conductivity has a high influence on efficiency, with optimal performance at 36 °C.
  • MFCs can operate at both 4.0 gL-1 and 3.0 gL-1 COD, with removal of organic matter.

Keywords

Microbial fuel cellConnection (principal bundle)Biochemical engineeringWastewaterSewage treatmentWaste management

Identifiers

DOI
10.20873/2024_v3_6
Journal
DESAFIOS - Revista Interdisciplinar da Universidade Federal do Tocantins
Year
2024