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AWWA MTC69654
- Permitting and Startup of the Largest Zero-Liquid Discharge Membrane Ultrafiltration Installation in North America
- Conference Proceeding by American Water Works Association, 11/01/2009
- Publisher: AWWA
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This paper discusses startup activities and the first year ofoperation of the 100 mgd Twin Oaks Valley WTP (TOVWTP) in San Diego, California, with particular attention to the permitting process with the state regulator,California Department of Public Health (CDPH) and the adaptation of the Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR)framework to meet CDPH's requirements. The information presented here has industry-widevalue given the sensitivity of the issues discussed and the scale of this facility. Issuesto be discussed are: development of a practical integrity verification plan (IVP); on-site validation of the volumetric concentration factor (VCF), including verification of the actual VCF in the membrane tank compared the theoretical guidelines provided in the Membrane Filtration Guidance Manual (MFGM), and impact of the return stream on VCF; correlation between LRV for different target organism; and, membrane integrity test frequency during plant startup.
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