Gary L Powers

US Patent:

53522761, Oct 4, 1994

Filed:

Aug 26, 1993

Appl. No.:

8/107837

Inventors:

Dennis Rentschler - Wilton NH
Steven Szabo - Nashua NH
Paul Farrow - Concord MA
Gary R. Powers - Weare NH
Jeffrey H. Gerade - Peter NH

Assignee:

Sippican, Inc. - Marion MA

International Classification:

B01D 1900

US Classification:

95246

Abstract:

A portable modular water air stripper system for remediation of contaminated water, such as groundwater at an outdoor contamination site, has its primary components, including the frames of a vertical assembly of individually demountable tray units, a sump and cap member, formed as hollow rotationally molded plastic pieces. Each tray unit has an air-porous sheet member having air-flow apertures with a diameter of 0. 100 inches or less constructed to retain water during stripping action by air passing upwardly through the apertures. Each sheet member is removable from a respective tray frame and has mounted thereon a baffle that defines a tortuous water flow path across each tray. In one embodiment, the baffles extend between and are substantially sealed to the undersurface of the next higher tray. According to another feature, a transfer duct is arranged to guide the least contaminated groundwater downwards and laterally to a position in the next lowest tray unit whereby the water will contact the most contaminated air of the next lowest tray unit. In a further embodiment, a vacuum pump for drawing stripping air through the system is mounted on the sump within a protective enclosure which also covers an air inlet provided in the sump through which stripping air is drawn.