EPA 540/SR-96/505
Summary: Innovative Methods for Bioslurry Treatment
IT Corporation
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Summary: Innovative Methods for Bioslurry Treatment
IT Corporation (2.3M)
ABSTRACT
Innovative Methods for Bioslurry Treatment
IT Corporation
Emerging Technology Summary
EPA 540/SR-96/505
August 1997
IT has used the Bioslurry Slurry Reactor (developed by Tenko Associates, Salt
Lake City, Utah) to treat soil contaminated with polyaromatic hydrocarbons (PAHs).
The first reactor mixes the contaminated soil with salicylate and succinate.
Salicylate induces the naphthalene degradation, while succinate is a by-product
of naphthalene metabolism and serves as a general carbon source. This reactor
removes the easily degradable carbon and increases biological activity on the
other PAHs. Effluent from the first reactor overflow into the second reactor
where Fenton's reagent is added to accelerate oxidation for four- and six-ring
PAHs. The third reactor is a polishing reactor to remove any partially-oxidized
contaminants remaining after the addition of the Fenton's reagent. Operation
of the reactors increases the rate and extent of PAH biodegradation, making
bioslurry treatment an effective and economically attractive remediation option.
A pilot-scale study was conducted when the technology was accepted into the
SITE Emerging Technology Program in 1993. About 4,000 pounds of PAH-impacted
soil, obtained from a wood-treating facility, was screened and treated during
the summer of 1994. Carcinogenic-PAH and PAH removals were demonstrated at 84
and 95 percent, respectively.
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Posted February 26, 1999
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