Disinfection –  Using ozone for wastewater disinfection or sterilisation is very common. The benefits of ozone for this application include; low ongoing costs, no chemical storage requirements, no residual chemicals left in the water such as harmful chlorination by-products.

The use of ozone in wastewater disinfection has gained popularity in recent years due to the secondary effects that ozone may offer in some applications. These secondary benefits have helped make ozone a cost effective alternative, and a necessary alternative in some applications.

• Colour removal – While ozone is used primarily for disinfection a secondary effect is color removal of the effluent water stream. Using ozone for disinfection may offer the elimination of a second technology such as clarifies, for color removal.
• Odor Removal – Oxidation of odor causing compounds in the water such as sulfate reducing bacteria, may also be a secondary effect of ozone use in wastewater. By eliminating these compounds odor control may be completed during the disinfection process.
• Micro-pollutant Removal – Micro-pollutant removal from water using ozone is gaining interest at a rapid rate. Ozone has been used successfully to  treat some heavy metals as well as some persistent organic contaminants which may eliminate the need to add processes in the treatment stream to comply with discharge regulations.