Liquid purification or separation – Flow – fluid pressure or material level – responsive
Patent
1997-08-28
2000-02-15
Smith, Duane
Liquid purification or separation
Flow, fluid pressure or material level, responsive
210170, 210258, 405117, 405136, C02F 100
Patent
active
060248688
ABSTRACT:
The present invention discloses a method and apparatus for extracting contaminants from the ground using a vacuum extraction process. Specifically, the invention discloses a circuit that can control the flow of atmospheric air into a vacuum extraction well. By controlling the air flow into the well, the air flow circuit serves to regulate the vacuum that is applied to sub-surface contaminants. This vacuum lifts the contaminated effluent from the ground, so it can be subjected to further processing.
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Hess Ronald E.
Salotti Michael T.
Williams Richard A.
Krishnan Aditya
Morrison Betsey J.
Smith Duane
Xerox Corporation
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