Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Patent
1992-05-13
1993-10-12
Drodge, Joseph W.
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
175 62, 210188, 210747, 210805, 405128, B01D 1900, E21B 700
Patent
active
052522261
ABSTRACT:
A series of horizontally extending drainage pipes forming a grid system are located at or below the level of a plume of liquid contamination. The drainage recovery pipes skim off the surface of the water table, along with the plume of contamination. This minimizes the time required for removal of water that needs to be pumped from the ground and cleaned. Once the contaminant is pumped from the ground, it is delivered to a conventional treatment system where it is cleaned and then the cleaned water is returned back to the ground water table. This cleaned water is reintroduced over the grid system and is drawn through the soil to flush out any remaining contaminants in the soil. Once the treated water reaches the water table, the liquid contaminants are usually less dense than water and rise towards the surface of the water table. The contaminants are then removed by the grid system for treatment.
REFERENCES:
patent: 3425555 (1969-02-01), Ridgeway
patent: 4435292 (1984-03-01), Kirk et al.
patent: 4600508 (1986-07-01), Deghetto
patent: 4871281 (1989-10-01), Justice
patent: 4895085 (1990-01-01), Chips
patent: 5118230 (1992-06-01), Justice
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