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Slaughterhouse wastewater treatment using an advanced oxidation process: Optimization study.

Reza Davarnejad1, Samaneh Nasiri1

  • 1Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran.

Environmental Pollution (Barking, Essex : 1987)
|January 29, 2017
PubMed
Summary

The electro-Fenton (EF) technique effectively reduced chemical oxygen demand (COD) and color in poultry slaughterhouse wastewater (PSW). Optimization using response surface methodology (RSM) identified ideal conditions for efficient pollutant removal.

Keywords:
CODElectro-FentonPoultry slaughterhouseWastewater treatment

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Area of Science:

  • Environmental Science
  • Water Treatment Engineering
  • Applied Chemistry

Background:

  • Poultry slaughterhouse wastewater (PSW) presents significant environmental challenges due to high chemical oxygen demand (COD) and intense color.
  • Conventional treatment methods often struggle to efficiently remove these pollutants, necessitating advanced oxidation processes.

Purpose of the Study:

  • To investigate the efficacy of the electro-Fenton (EF) technique for treating PSW.
  • To optimize EF process parameters for maximum COD and color removal using response surface methodology (RSM).

Main Methods:

  • The study employed the electro-Fenton (EF) technique to treat PSW.
  • Box-Behnken design (BBD) within RSM was utilized to optimize five independent variables: reaction time, pH, H2O2/Fe2+ molar ratio, current density, and H2O2/PSW volume ratio.
  • Experimental data were analyzed to determine optimal conditions for pollutant reduction.

Main Results:

  • Optimal conditions for 92.37% COD removal were determined as pH 4.38, 55.60 min reaction time, H2O2/Fe2+ ratio of 3.73, current density of 74.07 mA/cm², and H2O2/PSW ratio of 1.63 ml/l.
  • Optimal conditions for 88.06% color removal were found at pH 3.39, 49.22 min reaction time, H2O2/Fe2+ ratio of 3.62, current density of 67.90 mA/cm², and H2O2/PSW ratio of 1.44 ml/l.

Conclusions:

  • The electro-Fenton (EF) technique, optimized via RSM, is a highly effective method for reducing COD and color in poultry slaughterhouse wastewater.
  • The study successfully identified specific operational parameters that maximize the efficiency of the EF process for treating this challenging industrial effluent.