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Environmental Technology Verification Report; Removal of Microbial Contaminants in Drinking Water Dow Chemical Company - Water Solutions SFD-2880 Ultrafiltration Module
Citation:
Blumenstein, M., B. Bartley, AND J. Q. ADAMS. Environmental Technology Verification Report; Removal of Microbial Contaminants in Drinking Water Dow Chemical Company - Water Solutions SFD-2880 Ultrafiltration Module. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-11/004, 2011.
Impact/Purpose:
To inform the public.
Description:
The Dow SFD-2880 UF module was tested for removal of microorganisms using live Cryptosporidium parvum oocysts, endospores of the bacteria Bacillus alrophaeus, and the MS2 coliphage virus according to the product-specific challenge testing requirements of the EPA Long-Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR). Six modules were challenged with B. atrophaeus endospores and MS2. Separate challenges were conducted for each organism. The B. atrophaeus endosporcs served as a surrogate for Cryptosporidium. Two of the six modules were challenged with C. parvum oocysts to experimentally confirm the surrogate relationship. The modules were operated at a target flux of 70 gallons per square foot per day (gfd), which equates to a flow of 40.3 gallons per minute (gpm). The LT2ESWTR specifies that log removal values (LRV) be calculated for each module for each organism, and then one LRV for each organism (LRVc_TEST) be assigned from the set of LRVs. However, the rule does not specify how the LRVc_TEST should be determined; instead, different methods are suggested. For this verification, LRVs were calculated for each feed/filtrate sample pair, and an average LRV was calculated for each module. For each challenge organism two LRVc_TEST are reported. The first is the lowest average LRV from each challenge test. The second is the lowest individual sample point LRV across all of the modules tested.
URLs/Downloads:
ETV REPT; REMOVAL OF MICROB CONTAM IN DW DOW CHEMICAL COM, DOW WATER SOLUTIONS SFD-2880 ULTRAFILTR MODULEVERIFICATION STATEMENT