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EPA 540/MR-97/506
Cold Top Ex-Situ Vitrification Process
Geotech Development Corporation
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Cold Top Ex-Situ Vitrification Process
Geotech Development Corporation (271K)
ABSTRACT
Cold Top Ex-Situ Vitrification Process
Geotech Development Corporation
Demonstration Bulletin
EPA 540/MR-97/506
August 1997
The Cold Top Vitrification process, developed by Geotech Development Corporation,
is an ex-situ, submerged-electrode, resistance-melting technology. The technology
is designed to transform heavy metal contaminated soil into a glassy, amorphous,
non-leachable mass composed of interlaced polymeric chains of alternating oxygen
and silicon atoms. The developer claims that chromium (both trivalent and hexavalent)
can readily substitute for silicon in these chains, rendering the chromium immobile
to leaching by aqueous solvents. This technology has been successfully used to
process municipal solid waste incinerator ash, fly ash or bottom ash, asbestos-containing
materials and various slag materials. The heart of the system is an electric resistance
furnace capable of operating at melting points of up to 5,200 F (2870 C). The
furnace is cooled by water circulating within its hollow jacket and is equipped
with an off-gas treatment system. The SITE Demonstration of this technology was
conducted at Geotech's facility in Niagara Falls, NY on February 1 and March 11,
1997. The demonstration tests were performed on soils from two sites, representing
residue from two types of chromite-ore processing. During the test runs, samples
of untreated soil, off gas generated during the treatment, and baghouse dust were
collected and analyzed. Test results showed that the vitrified product was not
a characteristic hazardous waste according to the RCRA definition.
Back to SITE Home Page
Posted February 26, 1999
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