Biological treatment and ozone oxidation: Integration or coupling?
1Water Research Institute, C.N.R, Via F. De Blasio 5, 70123 Bari, Italy. claudio.diiaconi@ba.irsa.cnr.it
Bioresource Technology
|December 31, 2011
Summary
Integrating ozonation with biological treatment effectively removes recalcitrant organic compounds from industrial wastewaters, meeting strict discharge limits. This combined approach is crucial for treating challenging effluents from leather, textile, and landfill activities.
Area of Science:
- Environmental Engineering
- Water Treatment Technologies
- Industrial Wastewater Management
Background:
- Industrial wastewaters often contain persistent organic pollutants resistant to conventional biological treatment.
- Meeting stringent environmental discharge limits requires advanced treatment methods for recalcitrant compounds.
Purpose of the Study:
- To evaluate the efficacy of ozonation combined with biological treatment for industrial wastewater.
- To compare sequential (biological followed by ozonation) and integrated (biological and ozonation) treatment strategies.
- To assess treatment performance for effluents from leather processing, textile manufacturing, and municipal waste landfilling.
Main Methods:
- Investigated ozonation in conjunction with biological degradation processes.
- Compared treatment effectiveness of sequential and integrated ozonation-biological systems.
- Analyzed wastewater from leather and textile industries and landfill leachates.
Main Results:
- Sequential biological treatment followed by ozonation was insufficient for landfill leachates and tannery wastewater.
- Integrated ozonation and biological treatment demonstrated significant synergistic effects.
- The integrated approach successfully improved wastewater treatment performance for all tested effluents, enabling compliance with discharge limits.
Conclusions:
- Integrated ozonation and biological treatment is a highly effective strategy for recalcitrant industrial wastewater.
- Synergy between biological degradation and ozonation is key to achieving required depuration levels.
- This combined method offers a viable solution for meeting environmental discharge standards for diverse industrial wastewaters.
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