Ozone vs. Chlorine: When Should Industrial Buyers Choose Ozone?
A comparison of ozone and chlorine for water disinfection, residue, by-products, operating cost and typical industrial use cases.
Ozone is stronger and faster, but it does not leave residual
Ozone has a higher oxidation potential than chlorine and reacts quickly with microorganisms, odor compounds and many organic pollutants. However, it decomposes back to oxygen and does not maintain a long-distance residual in pipelines.
Residue-free disinfection is a key advantage
Food, beverage, aquaculture, pharmaceutical and high-value process water applications often prefer ozone because it does not leave chlorine taste, chloride load or persistent chemical residue.
Chlorine still has a role
In municipal distribution networks, chlorine or chloramine may still be used after ozone to maintain residual protection. Many water plants use ozone for advanced oxidation and keep a low chlorine residual for distribution.