EPA 540/AR-92/079
B.E.S.T.® Solvent Extraction Technology
Resources Conservation Company
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B.E.S.T.® Solvent Extraction Technology
Resources Conservation Company (2.7M)
ABSTRACT
B.E.S.T.® Solvent Extraction Technology
Resources Conservation Company
Applications Analysis Report
EPA 540/AR-92/079
June 1993
The Basic Extractive Sludge Treatment (B.E.S.T.®) process is a patented
solvent extraction system that uses triethylamine to separate organic
contaminants from sludges, soils, and sediments. Organics are concentrated
in an oil phase, thereby reducing the volume of waste requiring further
treatment. Multiple extractions are conducted and are followed by solvent
recovery, oil polishing, solids drying, and water stripping. Triethylamine
exhibits a property known as inverse miscibility, in which it is miscible
with water below 60 F and immiscible with water above 60 F. Solids can
be dewatered and organic contaminants extracted simultaneously during
"cold extractions"; and any remaining organic contaminants can be removed
during "warm" and "hot extractions". The process was demonstrated at the
Grand Calumet River in Gary, Indiana in July of 1992. Sediments collected
from two locations in the river were treated separately. Contaminant reductions
of 96% or greater for total PAHs and greater than 99% for total PCBs were
achieved.
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Posted February 26, 1999
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