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AWWA ACE70624
- Pilot Testing Pretreatment for the Country's (2nd) Largest Zero Liquid Discharge Membrane Treatment Facility
- Conference Proceeding by American Water Works Association, 11/01/2009
- Publisher: AWWA
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This powerpoint presentation begins by providing a brief overview of the 34 mgd David C. McCollom Water Treatment Plant (WTP) built in 2002,expanded in 2003, and its treatment process. Ultrafiltration (UF) system upgrades are presented, along with California Department of Public Health (CDPH) regulations, addition of tank drains, current plant performance, pilot testing, performance objectives, two source waters, enhanced pretreatment process, reduced pretreatment process, and test configuration. Presentation conclusions indicate the following: OMWD currently evaluating alternatives forplant improvements; full tank drains will improve water quality,allow maintenance cleans, and comply withregulations; extending backwash frequency to 3 hourswas effective at improving recovery (to 93%)without long term performance impacts. Includes figures.
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