Ozone applications Drinking water
| Because of its excellent disinfection and oxidation qualities, ozone is widely used for drinking water treatment. Ozone can be added at several points throughout the treatment system, such as during pre-oxidation, intermediate oxidation or final disinfection. Usually, it is recommended to use ozone for pre-oxidation, before a sand filter or an active carbon filter (GAC). After ozonization these filters can remove the remaining organic matter (important for final disinfection). |
This combination has several benefits:
Reduction of disinfection byproducts and improved disinfection
Figure 1: Removal of MIB and Geosmin (Colorado river water, US)
Generally, the most effective way to remove taste and odor components appears to be a combination of pre-oxidation and filtration . Table 2 shows several combinations of techniques to improve taste. Ozone with sand filtration and GAC filtration is the most efficient combination (82% removal).
Table 2: effect of ozone and subsequent treatment on odor threshold and odor reduction at Saint-Maur pilot treatment (France)