The ozonation process has the big advantage of being useful in a huge range of applications.
Ozone has the potential to been called the disinfectant of the century because it reacts with almost all organic substances, such as bacteria, viruses, protozoal cysts, etc. It also oxidizes heavy metals, sulfuric acid, and generally all substances containing multiple bonds. 
The ozonation is a highly recommended process for water treatment, through oxidation. The reaction of ozonolysis on double bonds allows the reduction of organic substances and of micro organic contaminants.
Ozone deactivates also viruses and it has a decolorizing and deodorizing effect.
It reduces the aloforma concentration and it increases the water redox value.
Ozone is immediately active also in small quantities and brings oxygen to water.