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ETV REPORT - PHYSICAL REMOVAL OF MICROBIOLOGICAL, PARTICULATE AND ORGANIC CONTAMINANTS IN DRINKING WATER - ZENON ENHANCED COAGULATION ZEEWEED ULTRAFILTRATION MEMBRANE SYSTEM AT ESCONDIDO, CALIFORNIA: NSF00/02/EPADW395
Citation:
ETV REPORT - PHYSICAL REMOVAL OF MICROBIOLOGICAL, PARTICULATE AND ORGANIC CONTAMINANTS IN DRINKING WATER - ZENON ENHANCED COAGULATION ZEEWEED ULTRAFILTRATION MEMBRANE SYSTEM AT ESCONDIDO, CALIFORNIA: NSF00/02/EPADW395. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-03/012 (NTIS CR 824815).
Description:
NSF Int in cooperation with EPA operates the Package Drinking Water Treatment Systems program, one of 12 technology areas under ETV. The performance of an enhanced coagulation membrane filtration systems used in package drinking water treatment system applications was recently evaluated. Verification testing of the ZENON Enhanced Coagulation ZeeWeed UF System was conducted over two test periods. The first test period, March 22 - April 19, 1999, represented winter/spring conditions. The second test period, September 22 to October 29, 1999, represented summer/fall conditions. The test system consists of an enhanced coagulation unit followed by a submerged ultrafiltration membrane unit. Verification testing was conducted at manufacturer specified operating conditions. Alum wa added to the enhanced coagulation unit at a dose of 30 mg/L along with acid to produce a coagulation pH of 6.2. The membrane unit was operated at a constant flux of 37 gfd (62 L/hr-m2), with air flow of 15 scfm (420 lpm) and an overall feedwater recovery of 95%. The combined enhanced coagulation and membrane unit achieved significant removal of organic material, in addition to microbial and particulate contaminants (presented later). Chemical cleaning of the treatment equipment was conducted as part of the verification testing.