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Related Experiment Videos

Ozone treatment for biorefractory COD removal.

S Baig1, P A Liechti

  • 1Degrémont SA, 183 avenue du 18 Juin 1940, 92500 Rueil Malmaison, France.

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|May 31, 2001
PubMed
Summary

Ozonation effectively removes biorefractory chemical oxygen demand (COD) from industrial wastewater. This advanced oxidation process is suitable for landfill leachate and paper industry effluents when combined with biofilm treatment.

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Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies
  • Chemical Oxidation

Background:

  • Industrial wastewater often contains biorefractory organic compounds that are difficult to remove using conventional biological treatments.
  • Landfill leachate and paper industry effluents pose significant challenges due to their complex and recalcitrant organic matter content.
  • Advanced oxidation processes (AOPs) are being explored for effective removal of persistent organic pollutants.

Purpose of the Study:

  • To evaluate the suitability of ozonation as an end-treatment for biorefractory chemical oxygen demand (COD) removal in industrial wastewater.
  • To assess the efficacy of ozone application in treating landfill leachate.
  • To investigate the combined effectiveness of ozonation and fixed-bed biofilm processes for post-treatment of biological effluents from the paper industry.

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Main Methods:

  • Case study approach involving two distinct industrial wastewater treatment scenarios.
  • Application of ozonation as an end-treatment or post-treatment step.
  • Utilized fixed-bed biofilm process in conjunction with ozonation for paper industry effluents.
  • Measured chemical oxygen demand (COD) as a key indicator of organic matter removal.

Main Results:

  • Ozonation demonstrated excellent oxidation yield for organic matter in landfill leachate, proving its suitability for COD removal.
  • The combination of ozonation and fixed-bed biofilm process proved highly effective for the post-treatment of biological effluents from the paper industry.
  • Ozone application as an end-treatment significantly improved the quality of treated wastewater by oxidizing recalcitrant organic compounds.

Conclusions:

  • Ozonation is a viable and effective technology for the removal of biorefractory COD from challenging industrial wastewater streams.
  • The integration of ozonation with biological processes, such as fixed-bed biofilm, enhances the overall efficiency of wastewater treatment.
  • Advanced oxidation with ozone offers a promising solution for tertiary treatment of industrial effluents, particularly those from the paper sector and landfill leachate management.