Liquid purification or separation – Processes – Chemical treatment
Patent
1989-08-29
1991-10-08
Dawson, Robert A.
Liquid purification or separation
Processes
Chemical treatment
2101951, 210197, 210219, 210220, 210241, 210805, 210806, 366102, 366107, C02F 1100, B01F 1302
Patent
active
050552040
ABSTRACT:
A mobile soil and sludge treatment apparatus and a method of treating soil and sludge useful in a soil washing process or a biological decontamination of soils and/or sludges. In one embodiment of the invention, a plurality of tanks are mounted on a vehicular trailer for over-the-road movement and each tank includes aerator/mixers and a plurality of peripherally arranged air jets with the mixing, aeration and air jets combining to prevent settling of the solids in the slurry during the decontamination process. In a second embodiment of the invention, a single large tank is mounted on a vehicular trailer with the tank including aerator/mixers and a slurry pump for recirculating the slurry throughout the tank with the recirculating pipes terminating in jet nozzles or eductors which enhance mixing and solids suspension. In a third embodiment, the aeration/mixing is obtained by a plurality of downwardly directed air jet nozzles adjacent the bottom of the tank. The apparatus and method efficiently maintain the suspension of solids in a slurry environment for enhancing solubilizing of contaminants from the solids and producing decontaminated soils.
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Dawson Robert A.
Drodge Joseph
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