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PFAS TREATMENT FOR MUNICIPAL WATER SUPPLY: STRATEGY AND PILOT TESTING TO RESTORE GROUNDWATER IN ORANGE COUNTY, CALIFORNIA
Plumlee, M., R. Medina, M. Pannu, J. Dadakis, S. Grieco, M. Hwang, A. Wille, and K. Dasu.
Groundwater Resources Association PFAS Week Virtual Conference, 27-29 April, 2020
The Orange County Water District (OCWD) has launched the nation's largest pilot program to test various treatment options for PFAS in groundwater and a planning study to help retailers evaluate how to quickly implement treatment. While the levels of PFOA and PFOS in Orange County groundwater wells are relatively low, OCWD is exploring long-term solutions to continue to meet all state and federal water quality standards. The pilots are being conducted in the Orange County Groundwater Basin, which provides 77% of the water supply for north and central Orange County. The pilot tests are evaluating granular activated carbon (GAC) filters (two 4-column skids with a 10-minute empty bed contact time [EBCT]), four ion exchange (IX) products with a 2-minute EBCT, and two novel adsorbents (polystyrene-based media with a 5-minute EBCT and modified zeolite media with a 2-minute EBCT). OCWD is also conducting laboratory-scale column testing of GAC and the novel adsorbents to use in conjunction with pilot test results to help predict full-scale product performance. OCWD is investing ~$1.4 million in the pilot and lab-scale testing. https://www.grac.org/media/files/files/2e3f1362/presentation-meganplumlee.pdf
More information: https://www.ocwd.com/news-events/newsletter/2019/december-2019/ocwd-launches-nation-s-largest-pfas-pilot-program-to-id-local-removal-remedy/
See YouTube video on the pilot: https://www.youtube.com/watch?v=mVgYqxsfzjY&feature=youtu.be
Groundwater Resources Association PFAS Week Virtual Conference, 27-29 April, 2020
The Orange County Water District (OCWD) has launched the nation's largest pilot program to test various treatment options for PFAS in groundwater and a planning study to help retailers evaluate how to quickly implement treatment. While the levels of PFOA and PFOS in Orange County groundwater wells are relatively low, OCWD is exploring long-term solutions to continue to meet all state and federal water quality standards. The pilots are being conducted in the Orange County Groundwater Basin, which provides 77% of the water supply for north and central Orange County. The pilot tests are evaluating granular activated carbon (GAC) filters (two 4-column skids with a 10-minute empty bed contact time [EBCT]), four ion exchange (IX) products with a 2-minute EBCT, and two novel adsorbents (polystyrene-based media with a 5-minute EBCT and modified zeolite media with a 2-minute EBCT). OCWD is also conducting laboratory-scale column testing of GAC and the novel adsorbents to use in conjunction with pilot test results to help predict full-scale product performance. OCWD is investing ~$1.4 million in the pilot and lab-scale testing. https://www.grac.org/media/files/files/2e3f1362/presentation-meganplumle
See YouTube video on the pilot: https://www.youtube.com/watch?v=mVgYqxsfzjY&feature=youtu.be
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