F.B. Leopold, a Xylem brand Desalination Pretreatment Leopold® Desalination Pretreatment Systems

Leopold® desalination pretreatment systems can significantly reduce membrane-fouling contaminants—color, organics, soluble metals, oil, algae—before they reach your reverse osmosis (RO) membranes. These seawater contaminants can affect effluent quality, damage the membranes, and even cause membrane failure because RO membrane filters are intended for removing only salt and dissolved ions when producing potable water from seawater. Complete Protection Not only can Leopold desalination pretreatment systems remove TSS, free oil, color, and organics, but Leopold offers the only system that can remove harmful algae blooms (HABs/red tide). Proven Reliability Leopold desalination pretreatment systems are in place and operating in RO membrane filtration plants located in the Middle East and Australia. They are treating raw water supplies with an SDI of 8 to 10, with excursions as high as 15. Using iron-based coagulants, and passing through a dual media anthracite/sand gravity filter at loading rates of 3 to 4 gpm/ft2 (7.5 to 10m/hr), the effluent SDI is consistently below 3 . . . within the SDI required by RO membrane suppliers.