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EPA 540/MR-93/511
Mobile Volume Reduction Unit at the Escambia Superfund Site
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Mobile Volume Reduction Unit at the Escambia Superfund
Site (17K)
ABSTRACT
Mobile Volume Reduction Unit at the
Escambia Superfund Site
Risk Reduction Engineering Laboratory and
Treatability Study Bulletin
EPA 540/MR-93/511
August 1993
RREL's VRU is a pilot scale, mobile soil washing system designed to remove organic
contaminants from soil through particle size separation and solubilization.
The VRU can process 100 pounds of soil (dry weight) per hour. The process subsystems
include soil handling and conveying, soil washing and coarse screening, fine
particle separation, flocculation/clarification, water treatment, and utilities.
The VRU is controlled and monitored with conventional industrial process instrumentation
and hardware. The VRU can treat soils that contain organics such as pentachlorophenol,
pesticides, and polynuclear aromatic hydrocarbons. A SITE demonstration of the
VRU was conducted in November 1992 at the Escambia Wood Treating Company in
Pensacola, Florida. During the demonstration, the VRU operated at a feed rate
of approximately 100 pounds per hour and a wash water-to-feed ratio of about
6 to 1. In the last test condition which had surfactant added and temperature
and pH adjusted, average PCP and PAH removal was 97% and 96%, respectively.
Feed soil returned as washed soil was 81%. Mass balance of total mass, PCPs
and PAHs were 98%, 24%, and 17%, respectively.
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Posted February 26, 1999
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