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The study investigates the effect of MgO nanoparticles on wastewater treatment and electricity generation using microbial fuel cells, demonstrating improved COD degradation, BOD reduction, and power voltage increase.

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What they did

System
MFC
Substrate
real wastewater

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Abstract

The present study demonstrates the effect of MgO nanoparticles concentrations on industrial wastewater treatment and electricity generation by microbial fuel cells. The MgO nanoparticles were prepared chemically using reflex methods by mixing magnesium hydroxide with ethanol. X-ray diffraction (XRD), Scan Electron Microscopy (SEM), and Fourier Transform Infrared Spectroscopy (FTIR) were done for nanoparticle characterization. (Biological oxygen demand -BOD) and (Chemical oxygen demand - COD) were used as indicators to measure the acidity of wastewater. As a result, microbial fuel cells were proposed as a treatment method for wastewater. Nanoparticles with microbial fuel cell technology will always yield positive results in industrial water treatment. The results showed that using 0.025 mg/ml MgO nanoparticles in microbial fuel cells at pH 3 increased the COD degradation to (95.001%) through 30 min, BOD to (95.05%), and power voltage to (0.76) V. Therefore, treat the wastewater via microbial fuel cells were suggested. Nanoparticles with microbial fuel cell technology will always yield positive results in industrial water treatment.

Key findings

  • MgO nanoparticles improved COD degradation to 95.001% at pH 3 in 30 minutes
  • MgO nanoparticles reduced BOD to 95.05% at pH 3 in 30 minutes
  • MgO nanoparticles increased power voltage to 0.76 V at pH 3 in 30 minutes

Keywords

Microbial fuel cellChemical oxygen demandWastewaterFourier transform infrared spectroscopyNanoparticleMagnesium

Identifiers

DOI
10.25130/tjes.31.2.21
Journal
Tikrit Journal of Engineering Sciences
Year
2024