| 摘要 |
PCT No. PCT/US92/01241 Sec. 371 Date Aug. 26, 1993 Sec. 102(e) Date Aug. 26, 1993 PCT Filed Feb. 26, 1992 PCT Pub. No. WO92/14533 PCT Pub. Date Sep. 3, 1992.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.
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