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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT, PHYSICAL REMOVAL OF MICROBIAL CONTAMINATION AGENTS IN DRINKING WATER, ECOWATER SYSTEMS, INC., SEARS KENMORE ULTRAFILTER 500 DRINKING WATER TREATMENT SYSTEM (POU)
Citation:
NSF International. ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT, PHYSICAL REMOVAL OF MICROBIAL CONTAMINATION AGENTS IN DRINKING WATER, ECOWATER SYSTEMS, INC., SEARS KENMORE ULTRAFILTER 500 DRINKING WATER TREATMENT SYSTEM (POU). U.S. Environmental Protection Agency, Washington, DC.
Impact/Purpose:
to present information
Description:
The Sears Kenmore Ultrafilter 500 RO system was tested for removal of bacteria and viruses at NSF International's Drinking Water Treatment Systems Laboratory. EcoWater Systems submitted ten units for testing, which were split into two groups of five. One group received 25 days of conditioning prior to challenge testing, while the second group was tested immediately. Both groups were identically challenged. The challenge organisms were the bacteriophage viruses fr, MS2, and Phi X 174, and the bacteria Brevundimonas diminuta and Hydrogenophaga pseudoflava. The test units were challenged at two different inlet pressures ? 40 and 80 pounds per square inch, gauge (psig). The virus challenges were conducted at three different pH settings (6, 7.5, and 9) to assess whether pH influences the performance of the test units. The bacteria challenges were conducted only at pH 7.5. The test units removed all challenge organisms to less-than-detectible levels in all challenges but the pH 9, 80 psig challenge. The data does not show whether conditioning, inlet pressure or pH influenced bacteria and virus removal.