Superfund Innovative Technology Evaluation (SITE)
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|Anaerobic Thermal Processor
Soiltech ATP Systems, Inc.
The ATP uses a rotary kiln to desorb, collect, and recondense organic contaminants from soil. It can also destroy halogenated hydrocarbons at elevated temperatures. Volatile organic compounds are vaporized in the preheat zone. Hot solids and heavy hydrocarbons pass through a sand seal into the retort zone. Hot treated soil, which enters the retort zone from the combustion zone through another seal, provides the energy to desorb contaminants. The coked soil enters the combustion zone from the retort zone, and then enters the cooling zone. Heat from the cooling soil is transferred to incoming contaminated soil in the preheat zone. Condensed oil and water are separated. Flue gases are removed from the combustion zone under a slight vacuum and pass through the cooling zone, cyclone, baghouse, wet scrubber, and carbon adsorption bed. ATP was demonstrated at the Wide Beach Development Superfund site at Brant, New York, in June 1992. ATP removed 99% of polychlorinated biphenyls (PCBs) in the contaminated soil, and cut dioxin and furan stack gas emissions to below the site-specific standards.