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Related Experiment Videos

Phenol biodegradation and its effect on the nitrification process.

L Amor1, M Eiroa, C Kennes

  • 1Faculty of Sciences, Chemical Engineering Laboratory, University of A Coruña, Alejandro de la Sota n(o) 1, 15008-A Coruña, Spain.

Water Research
|July 7, 2005
PubMed
Summary
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Phenol biodegradation is effective in activated sludge systems, even at high concentrations. This study found that phenol did not inhibit nitrification in the reactor, contrary to batch assay results.

Area of Science:

  • Environmental Microbiology
  • Wastewater Treatment

Background:

  • Phenol is a common industrial pollutant.
  • Its biodegradation and impact on nitrification are critical for wastewater treatment.

Purpose of the Study:

  • To investigate aerobic phenol biodegradation.
  • To assess phenol's effect on nitrification in batch and reactor systems.

Main Methods:

  • Batch assays were conducted to determine phenol biodegradation and nitrification inhibition.
  • An activated sludge reactor was operated with increasing phenol loading rates.

Main Results:

  • Complete phenol biodegradation was observed in batch assays (100-2500 mg/L).
  • Batch assays showed nitrification inhibition at phenol concentrations >1000 mg/L.

Related Experiment Videos

  • The activated sludge reactor achieved >99.9% phenol removal and 99.8% ammonium removal, with no nitrification inhibition.

    • Conclusions:

    • Activated sludge systems can effectively biodegrade high phenol concentrations.
    • Phenol does not inhibit nitrification in activated sludge reactors under tested conditions, despite batch assay observations.