AOP Advantages Disadvantages US -Versatile technology -Suitable for small volumes -Interesting upgrade applications -Energy consuming technology -Sonotrode erosion issues O3 -Strong oxidative power -Effective for a wide spectrum of pollutants -Existing full -scale applications -Energy consuming -High operating costs -Risks associated to ozone generation O3/UV -More effective than O3 or UV alone -More energy intensive than single processes H2O2/UV -UV promote •OH formation -High efficiency -Turbidity can interfere with UV radiation Fenton-based reactions -Not as energy intensive as other AOPs -Developing technology -Need for acidic conditions UV/TiO2 -Can be performed at higher wavelenghts than other UV-based processes -Developing technology -Need for pretreatment

Table 2: Advantages and drawbacks of discussed AOPs.