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Portable filter system

A filter system for receiving an aqueous-based fluid contaminated with particles and emulsified contaminant oil, removing the particles, and separating the emulsified contaminant oil from the aqueous-based fluid includes a filter media for receiving the aqueous-based fluid and emulsified contaminant oil, having an inner filter element formed from a 95 percent single pass efficiency 48 micron (5 micron nominal) filtering material of needle punch polypropylene felt, an outer filter element formed from a 95 percent single pass efficiency 19 micron absolute filtering material of a polypropylene microfiber material and a porous spunbond polypropylene sandwiching the outer filter media. The filter element removes particles, de-emulsifies the emulsified contaminant oil from the aqueous-based fluid into the contaminant oil and the aqueous-based fluid, separates the de-emulsified contaminant oil from the aqueous-based fluid, coalesces the separated contaminant oil and passes both the coalesced de-emulsified contaminant oil with entrained particles and the aqueous-based fluid. A first tank supports the filter element and is further configured to hold a quantity of the separated coalesced contaminant oil and the aqueous-based fluid. The first tank has a first outlet passing the aqueous-based fluid from the first tank to near the bottom of the second tank and a second outlet passing the separated coalesced contaminant oil to the top of the second tank. The second tank has an oil separation assembly for separating the aqueous-based fluid from the contaminant oil and passing the aqueous-based fluid therefrom. The second container also has a drain valve assembly for removing only the accumulated coalesced de-emulsified contaminant oil. A method for separating the emulsified contaminant oil from the aqueous-based fluid and recovering the aqueous-based fluid is also disclosed.
Owner:BANK OF AMERICA N A
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