The Halia Advanced Oxidation System (photo) incorporates HiPOx technology, an ozone-based advanced oxidation process for water treatment. In the Halia advanced oxidation process (AOP), the HiPOx reactor efficiently injects and mixes O3 and H2O2 to maximize the production of hydroxyl free radicals. Hydroxyl free radicals are one of the most powerful oxidants available for water treatment to destroy pathogens and difficult-to-treat organic contaminants — including 1,4-dioxane, chlorinated solvents, petroleum hydrocarbons and endocrine-disrupting chemicals — without creating additional waste streams. HiPOx AOP is significantly more efficient than O3 alone with respect to both ozone dose and reaction time, enabling lower operating costs and improved performance with a smaller equipment footprint. HiPOx technology is the first O3-based technology accepted by the State of California for unrestricted water reuse under Title 22 of the California Code of Regulations. — Air Products and Chemicals, Inc., Allentown, Pa.