WP2: Ozonation of wastewater for removal of micropollutants

Ozonation is already in use for removal of micropollutants from municipal wastewater. This work package is dedicated on improving ozonation processes from different perspectives.

Ozonation is already in use for removal of micropollutants from municipal wastewater. This work package is dedicated on improving ozonation processes from different perspectives. Mechanisms behind formation of oxidation products will be studied and coupled to advanced treatment in practice.

Dosing and reaction time are important factors in understanding design and ozonation efficiency as well as formation of various transformation products. Post-treatment, for potential degradation of transformation products, in Moving Bed Biofilm Reactors (MBBRs) is an essential
part of the work.

Vision

Environmental effective ozonation for removal of micropollutants at municipal WWTP’s.

Objectives

To optimise the ozonation removal technology with regards to environmental effectiveness and specifically generate new scientific based knowledge on the assessment of treatment efficiency and generate data for cost assessment and environmental performance.

 

 

Tasks

  • Optimization of the ozonation process
  • Studies – in pilot and in laboratory – of removal rates considering variations in pH, TOC and iron
  • Optimization of ozone dosing and ozone transfer into the water
  • Determination of unknown transformation products (TP’s)
  • Elucidation of formation and removal of formed TP’s

 

First results

Baseline measurements showing dose-response for:

  • Atenolol (beta blocker for treatment of high blood pressure)
  • Iohexol (contrast agent used during X-rays)
  • Sulfamethoxazole (antibiotic for bacterial infections)

 

Goals

  • Minimize energy input and maximize removal efficiency
  • Gain understanding on formation and removal of TP’s
  • Improved and optimized design of ozonation processes

 

Contact information​

K​ey person
Maja Ekblad, Sweden Water Research/Lund University

Other participants

Per Falås, Lund University
Mikael Scott, Primozone​
Marinette Hagman, Sweden Water Research
Rubén Juárez, Sweden Water Research/Lund University

WP-leader
Michael Cimbritz, Lund University, michael.cimbritz@chemeng.lth.se

Project Coordinator
Prof. Kai Bester, kb@envs.au.dk Aarhus University, Dep. of Environ. Sci., Frederiksborgvej 399, DK-4000 Roskilde