Oxidation of Emerging Contaminants during Pilot-Scale Ozonation of Secondary Treated Municipal Effluent

Abstract

The transformation of 41 target emerging contaminants in secondary treated municipal wastewater effluent in Canada was examined at pilot-scale, at transferred ozone doses of 2.8 mg/L (0.46 O₃/mg DOC) and 4.4 mg/L (0.72 mg O₃/mg DOC). In general, transformation efficiencies of CECs either increased or were retained at the higher ozone dose. The higher ozone dose of 0.72 mg O₃/mg DOC (Z_spec = 0.6 mg O₃/mg DOC) was sufficient to transform 21 of the 31 detected CECs by over 80% as well as achieving the disinfection target of < 200 MPN E. coli per 100 mL.

Keywords:

• Ozone
• Advanced Oxidation
• Contaminants of Emerging Concern
• Municipal Wastewater
• Pharmaceutically Active Compounds
• Pharmaceuticals
• Secondary Treated Effluent
• Wastewater Treatment

Additional information

Funding

The authors also acknowledge financial assistance from the Ontario Ministry of the Environment.