AWWA ACE63055

The City of San Diego is in the process of revising their Water Reuse Master Plan to include an evaluation of all options for the use of recycled water to meet current and future water supply and reuse needs. Some recycled water use alternatives, such as raw water reservoir augmentation, would require a much higher water quality than is currently available. To evaluate whether the required water quality could be achieved, the City conducted an 18-month (July 2004 ¿¿¿¿¿¿¿¿ December 2005) pilot testing program of an advanced water treatment (AWT) train. The AWT consisted of three treatment steps: ultrafiltration (UF); reverse osmosis (RO); and ultraviolet (UV) light + hydrogen peroxide. This testing program evaluated the water quality performance of the AWT train during operation on tertiary water from the City's North City Water Reclamation Plant (NCWRP). The testing program also evaluated new generation RO membranes designed for water reuse, assessed several indirect and direct RO membrane integrity monitoring methods and determined the impact of advanced oxidation (UV + hydrogen peroxide) on select endocrine disrupting compounds (EDCs), and pharmaceuticals and personal care products (PPCPs). This paper focuses on the operational and water quality performance of the RO system. Includes 2 references, tables, figures.