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Removal of Inorganic, Microbial, and Particulate Contaminants from a Fresh Surface Water: Village Marine Tec. Expeditionary Unit Water Purifier, Generation 1
Citation:
Blumenstein, M., B. Bartley, AND JEFF Q. ADAMS. Removal of Inorganic, Microbial, and Particulate Contaminants from a Fresh Surface Water: Village Marine Tec. Expeditionary Unit Water Purifier, Generation 1. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-09/124, 2009.
Impact/Purpose:
To inform the public.
Description:
The Village Marine Tec. Generation 1 Expeditionary Unit Water Purifier (EUWP) is a mobile skid-mounted system employing ultrafiltration (UF) and reverse osmosis (RO) to produce drinking water from a variety of different water quality sources. The UF components were evaluated to test its design production capacity of up to 250,000 gallons per day (gpd) of potable water. Using both the UF and RO components, it is designed to produce from 98,000 gpd up to 162,000 gpd, depending on the TDS of the source water and the recovery settings of the RO system. The testing site was Lake St. Clair at Selfridge Air National Guard Base (ANGB) in Michigan. The raw water quality exhibited moderate levels of TOC, TDS, alkalinity, hardness, microbials, and turbidity but subject to spikes following rain events. The mean water recovery for the UF system was 88.8% with a calculated daily filtrate production volume of 253,440 gal. UF pressure decay tests were conducted daily with a mean value of 0.025 psig/min and a median value of 0.017 psig/min, values indicative of no integrity breaches. The UF system reduced turbidity from a mean of 2.3 NTU in the feed water to a mean of 0.14 NTU in the UF filtrate. The filtrate turbidity 95% confidence interval is 0.12 to 0.16 NTU. The geometric mean feed endospore count was 1,562 CFU/100 mL, with range of 862-7,420 CFU/100 mL. The mean filtrate endospore count was 203 CFU/100 mL, with a range of 78-996 CFU/100 mL. The mean log reduction was 0.88 log10 with a range of 0.07-1.74 log10. The UF system reduced the 2-3 µm particles by a mean value of 2.21 log 10 with a median reduction value of 2.38 log10. The UF system reduced the 3-5 µm particles by a mean value of 2.33 log10 with a median reduction value of 2.52 log10. The RO system averaged 84,330 gpd over the entire test period, falling short of the goal of producing 100,000 gpd. The RO system impact on the turbidity levels resulted in mean turbidity of 0.09 NTU. The maximum measured RO permeate turbidity was 0.18 NTU. Direct integrity measurements of the RO system were performed prior to the start of the verification test and again at the end of the test. The dye marker tests measuring UV absorbance of RO feed, permeate, and concentrate showed good integrity at the beginning and end of the verification test.
URLs/Downloads:
ETV Verification Reports & SummariesREMOVAL OF INORG, MICROB, AND PARTICULATE CONTAM FROM A FRESH SURFACE WATER: VILLAGE MARINE TEC. EXPED UNIT WATER PURIFIER, GEN 1