||Orange County Water District, Fountain Valley, CA. ;Stanford Univ., CA. ;SRI International, Menlo Park, CA.;Municipal Environmental Research Lab., Cincinnati, OH.
The performance and reliability of Water Factory 21 (WF21) in Orange County, California, for removal of a broad range of organic, inorganic, and biological contaminants from activated-sludge treated municipal wastewater was evaluated. This full-scale facility has a capacity of 0.66 cu m/s (15 MGD) and includes chemical treatment, air stripping, activated carbon adsorption, reverse osmosis treatment, and disinfection. WF21 furnishes reclaimed water for a hydraulic barrier that prevents intrusion of sea water into the local fresh water aquifer. This report is the final one of three reports describing the operation over a five-year period, and covers the last three-year period when analyses were most intensive. The objective of this study was to provide sufficient long-term data on performance, reliability, and cost of full-scale advanced wastewater treatment to aid in the evaluation of its feasibility for the production of reclaimed water for potable use. Operational problems and costs of treatment were documented, the statistical reliability of the treatment system to meet current EPA drinking water regulations was evaluated, the efficiency of the various processes and the overall system to remove trace contaminants was determined, the effectiveness of the system in removing (or producing) mutagenic materials was documented, and potential surrogate parameters to serve as indicators of the effectiveness of treatment for contaminants of concern were evaluated.