Pure Water San Diego is the City’s 20-year program to provide a safe, reliable and sustainable local drinking water supply for San Diego. In June 2011, San Diego began operation of a one (1) million gallon per day (MGD) demonstration facility called the Advanced Water Purification (AWP) Facility. The AWP Facility consists of parallel micro-filter and ultra-filter (MF/UF), reverse osmosis, and Advanced Oxidation Process (AOP) using ultraviolet light (UV) and sodium hypochlorite. Over 7 years of water quality and equipment performance data has been collected at this facility. This talk focuses on modeling the performance of the UV/free chlorine for removal of 1,4-dioxane during challenge testing performed at various operating conditions over past 2 years. Experiments were carried out at different UV fluence, oxidant dosing, UV transmittance, and water quality. UV/free chlorine was evaluated for removal of 1,4-dioxane as an alternative to the UV/hydrogen peroxide and results compared to previous work performed at the facility. This presentation also provides a summary of results from disinfection byproduct monitoring conducted over past 2 years.

Performance of UV/free chlorine AOP for removal of 1,4-dioxane in potable reuse applications

2019 Fall National Meeting

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