Wastewater Technology Fact Sheet Ozone Disinfection

This EPA fact sheet explains how ozone disinfection works in wastewater treatment and why ozone is considered a powerful oxidant for destroying bacteria, viruses, and other pathogens. Ozone is generated onsite because it is unstable, and the document describes the main stages of an ozone system, including feed gas preparation, ozone generation, ozone contacting, and ozone destruction. It also highlights that disinfection performance depends heavily on ozone dose, mixing, contact time, and efficient transfer of ozone into the water.

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