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Simultaneous phenol removal, nitrification and denitrification using microbial fuel cell technology.

Chunhua Feng1, Liqiao Huang1, Hui Yu1

  • 1School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China.

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Summary
This summary is machine-generated.

This study demonstrates a dual-chamber microbial fuel cell (MFC) effectively removes phenol and nitrogen simultaneously. The MFC shows enhanced performance over traditional methods, highlighting its potential for industrial wastewater treatment.

Keywords:
Coking wastewaterInhibitory effectMicrobial fuel cellPhenol removalSimultaneous nitrification and denitrification

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Area of Science:

  • Environmental biotechnology
  • Wastewater treatment
  • Electrochemical processes

Background:

  • Phenolic compounds and nitrogen are common pollutants in industrial wastewater.
  • Simultaneous removal of these pollutants is challenging with conventional methods.
  • Microbial fuel cells (MFCs) offer a potential solution for combined pollutant degradation and energy recovery.

Purpose of the Study:

  • To investigate the efficacy of a dual-chamber MFC for simultaneous removal of phenol and nitrogen.
  • To evaluate the impact of phenol concentration on nitrification and nitrogen removal in the MFC.
  • To compare the MFC's performance against traditional aerobic bioreactors (ABRs) and open-circuit MFCs.

Main Methods:

  • A dual-chamber MFC with an anion-exchange membrane was employed.
  • Experiments involved feeding ammonium and varying phenol concentrations to the aerobic cathode chamber.
  • Bacterial community analysis was conducted to identify key microbial roles.

Main Results:

  • Simultaneous nitrification and denitrification were achieved in the MFC.
  • Phenol did not significantly inhibit nitrification up to 600 mg L⁻¹.
  • The MFC demonstrated higher nitrogen removal rates and less nitrification inhibition compared to ABRs and open-circuit MFCs.
  • Electrochemical activity and specific microbial populations in each chamber were linked to pollutant removal.

Conclusions:

  • The dual-chamber MFC is effective for simultaneous removal of phenol and nitrogen.
  • MFC technology shows promise for treating industrial wastewaters containing both pollutants.
  • The reactor design facilitates efficient pollutant degradation and potential electricity generation.