THM's have been proven to be cancerous. Ozone will reduce the THM precursors. Oxidizing and filtering organic matter with ozone prior to chlorination reduces the THM precursors. This in turn reduces chlorine demand as just enough chlorine is added after ozonation and filtration to provide residual disinfection through the distribution system. On smaller treatment systems with shorter distribution lines it is possible to eliminate the need for chlorine all together.
Ozone readily oxidizes the troublesome trio - iron, manganese, and hydrogen sulfide.
Ozone also oxidizes many other substances including ammonia, cyanide, nitrite, tannins, and aromatic hydrocarbons, benzene, toluene, and xylene. Because ozone reacts over 1000 times faster than chlorine contact time for oxidation and disinfection is much less. A lower contact time requirement significantly reduces contact space requirements and costs. Ozone is Safer and Healthier Ozone is a gas that is created by electricity and cannot be stored or transported it must be generated on site as it is being used. Because ozone is generated on site as needed there are no chemicals to purchase, transport or store.