articleEnvironmental Science & TechnologyAug 13, 2009Closed access

Elimination of Organic Micropollutants in a Municipal Wastewater Treatment Plant Upgraded with a Full-Scale Post-Ozonation Followed by Sand Filtration

JHJuliane HollenderSGSaskia Gisela ZimmermannSKS. KoepkeMKMartin KraußCSChrista S. McArdell

Swiss Federal Institute of Aquatic Science and Technology

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Abstract

The removal efficiency for 220 micropollutants was studied at the scale of a municipal wastewater treatment plant (WWTP) upgraded with post-ozonation followed by sand filtration. During post-ozonation, compounds with activated aromatic moieties, amine functions, or double bonds such as sulfamethoxazole, diclofenac, or carbamazepine with second-order rate constants for the reaction with ozone >10(4) M(-1) s(-1) at pH 7 (fast-reacting) were eliminated to concentrations below the detection limit for an ozone dose of 0.47 g O3 g(-1) dissolved organic carbon (DOC). Compounds more resistant to oxidation by ozone such as atenolol and benzotriazole were increasingly eliminated with increasing ozone doses, resulting in…

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Topics & keywords

Topics
Keywords
  • Chemistry
  • Ozone
  • Effluent
  • Environmental chemistry
  • Bromate
  • Wastewater
  • Sewage treatment
  • Reaction rate constant
UN Sustainable Development Goals
  • Clean water and sanitation
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