An advanced oxidation system has been selected by the City of Wichita, Kans., for a crucial step in the process of treating excess water flow from the Little Arkansas River for aquifer storage and future reuse. The system will treat 30 million gallons of surface water per day using the ozone/peroxide advanced oxidation process (AOP)—to destroy atrazine, control bromate formation, and meet virus inactivation requirements for health and human safety.
Atrazine, a known endocrine disrupting chemical (EDC) and the main ingredient in about 40 name-brand herbicides, is showing up in drinking water supplies, causing concern among regulatory agencies throughout the United States. Herbicides often move with rainwater from the point of application to nearby bodies of water, such as reservoirs, ponds and lakes, eventually finding their way into drinking water supplies.
The ozone/peroxide advanced oxidation system can help meet disinfection requirements while also destroying trace contaminants and minimizing the formation of by-products, such as bromate, making it ideal for drinking water applications, as well as water reuse and process water clean-up.
The process injects and mixes ozone and hydrogen peroxide to maximize the production of hydroxyl free radicals—one of the most powerful oxidants available for water treatment—to treat various compounds. AOP is significantly more efficient than ozone alone with respect to both ozone dose and reaction time, enabling lower operating costs and improved performance with a smaller equipment footprint.