Chlorination: Chlorination is used to eliminate bacteria and algae present in the water, it acts by destroying the cell wall of microorganisms and oxidizing the organic matter that is their food, thus producing death.
Ozone:Ozonation is used to eliminate bacteria and algae present in the water, just as chlorine destroys the cell wall of microorganisms and oxidizes organic matter, however its effect is much faster than chlorine and it does not produce toxic by-products. since once it acts it degrades to oxygen so it does not provide permanent odor or flavor to the water, its life time is approximately 20 minutes
Ultraviolet Light: Ultraviolet light is used to eliminate bacteria and some viruses from water. When it strikes microorganisms, they modify the DNA, causing their death and their inability to reproduce.
For this process to be effective, it is important that the water is completely free of turbidity and suspended solids, its effect is instantaneous and does not provide residual protection.