|Environmental Technology Verification Report, Removal of Arsenic in Drinking Water, Pall Corporation Microza Microfiltration System (97 pp, 792 KB) (EPA/600/R-05/120) September 2005
Verification Statement (PDF) (6 pp, 60 KB)
Verification testing of the Pall Corporation’s Microza Microfiltration System for arsenic removal was conducted at the Oakland County Drain Commissioner Plum Creek Development well station located in Oakland County, Michigan. The testing took place from August 19 through October 8, 2004.
The source water was ground water from the two supply wells, and the raw water for the verification test was withdrawn from the pressure tank at the site. Verification testing was conducted at the operating conditions specified by the manufacturer. The raw water, with a pH in the range of 7.0 to 7.4, was treated with sulfuric acid to lower the pH to a range of 6.6 to 7.0. Chlorine (bleach) was added to oxidize arsenic (III) to arsenic (V), and iron was added to coagulate the arsenic.
When operated under the manufacturer’s specified conditions at this site, with a flow rate of 6.3 gallons per minute, the Microza System reduced the total arsenic concentration from an average of 13 micrograms per liter (µg/L) in the feed water (raw water after chemical addition) to below the detection limit of 2 µg/L in the filtrate (treated) water.
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