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A microbial fuel cell with anoxic/oxic design was developed for treatment of saline seafood wastewater and biological electricity generation, achieving a maximum power density of 16.2 W/m².

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

Extraction

Reported parameters

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What they did

System
MFC

What worked

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Abstract

Abstract BACKGROUND: Sustainable technologies need to be developed to treat saline seafood wastewater (SSW) efficiently. This study focused on the feasibility of a continuously operated microbial fuel cell (MFC) with modified anoxic/oxic (A/O) architecture (A/O–MFC) for power generation and treatment of SSW simultaneously. RESULTS: Hydraulic retention time (HRT) was shown to have an impact on polarization and power output of the A/O–MFC and the maximum power density of 16.2 W m −3 was obtained at a current density of 41.7 A m −3 and HRT of 4.2 h. High salinity together with advective flow mode enabled a low and constant internal resistance of approximately 100 Ω throughout the experiments. Besides, pH of waste stream in both compartments was found always near neutral level. Increasing HRT could improve eliminability of soluble chemical oxygen demand (sCOD) and biological nitrification. CONCLUSIONS: This study provides a proof‐in‐concept demonstration to utilize an MFC for effective and sustainable treatment of SSW along with recovery of electrical energy. Copyright © 2010 Society of Chemical Industry

Key findings

  • The hydraulic retention time (HRT) had a significant impact on the polarization and power output of the A/O-MFC.
  • A maximum power density of 16.2 W/m² was obtained at a current density of 41.7 A/m² and HRT of 4.2 h.
  • The system maintained a low and constant internal resistance of approximately 100 Ω throughout the experiments.

Keywords

Microbial fuel cellAnoxic watersHydraulic retention timeWastewaterSalinityChemical oxygen demand

Identifiers

DOI
10.1002/jctb.2400
Journal
Journal of Chemical Technology & Biotechnology
Year
2010