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U.S. EPA Superfund Innovative Technology Evaluation
(SITE) Program This document is available in the Adobe Acrobat PDF Format. Click here for information about Portable Document File (PDF) Formats. or Click here to directly download the Acrobat Reader. (To view the PDF, it is recommended that you use the latest version of Acrobat Reader. Thermal Desorption System (TDS), Clean Berkshires, Inc. (405KB) Abstract Clean Berkshires Inc.’s Thermal Desorption System (TDS) uses standard rotary kiln technology to remove organic contaminants from excavated solid wastes. Thermal desorption is an ex-situ physical separation technique that transfers contaminants from soil and water to the gas phase. Contaminants in the gas phase are then either captured by condensation or adsorption, or destroyed by using an off gas combustion system. The processed solids are either reused or disposed of as nonhazardous, depending on applicable regulations. The CBI was evaluated under the SITE Program at the Niagara Mohawk Power Corporation’s Remediation Technologies Demonstration Facility at Harbor Point in Utica, New York in November/December 1993. Four different types of Manufactured Gas Plant (MGP) waste were tested: (1) coke plant residuals, (2) purifier bed wastes, (3) water gas plant residuals, and (4) Utica Terminal Harbor sediments. The CBITDS achieved destruction and removal efficiencies (DREs) of 99.99% or greater in all 12 runs using total xylenes as a volatile principal organic hazardous constituent (POHC). DREs of 99.99% or greater were achieved in 11 of 12 runs using naphthalene as a semivolatile POHC. Average concentrations for critical pollutants in processed solids were (estimated) 0.066 mg/kg total BTEX, 12.4 mg/kg total PAHs, and 5.4 mg/kg total cyanide. The CBITDS can be applied at any site where the following conditions exist: the target waste can be excavated or dredged readily for processing, target pollutants are amenable to desorption at kiln temperature with a capacity between 600 and 1,100EF, and gas phase contaminants can be destroyed in an afterburner at temperatures of 2,000EF or less.
Posted October 1, 1999
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