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U.S. EPA Superfund Innovative Technology
Evaluation (SITE) Program Biogenesis SM Soil
and Sediment Washing Process Biogenesis
Enterprises, Inc.
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Biogenesis SM Soil and Sediment Washing Process
Biogenesis Enterprises, Inc. (804KB)
ABSTRACT
Biogenesis SM developed a soil washing technology that uses patent-pending
equipment, surfactants, and water to clean soil, sediment, and sludge contaminated
with organic and inorganic constituents. A truck-mounted batch unit processes
20 cubic yards per hour (yds3/hr) of soil particles 10 mesh and larger. A full-scale,
mobile, continuous-flow unit cleans sand, silt, clay, and sludge particles smaller
than 10 mesh at a rate of 20 to 40 yds3/hr. The process consists of particle
sizing equipment, soil and sediment washing units, and water treatment and reconditioning
equipment. The sediment washing unit includes a mixing chamber and scrubber
to loosen the bonds between pollutants and the particles. Settling tanks and
hydrocyclones are used to improve particle separation. Solids are sent to a
treated soil pile. Liquids are treated and recycled to the plant for reuse.
Equipment configurations vary depending on the soil matrix. The technology extracts
inorganics, volatile and non-volatile organic contaminants, PCBs, and pesticides.
In November 1992, this technology was demonstrated on weathered crude oil at
a refinery site in Minnesota. Approximately 85 percent of the total recoverable
hydrocarbons (TRPH) were removed.
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Posted March 30, 2000
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