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Cost and Performance Review of Electrical Resistance Heating (ERH) for Source Treatment
BATTELLE COLUMBUS OH
Pagination or Media Count:
This cost and performance report is a critical review of technical and performance data from four recent Navy projects and one National Aeronautic and Space Administration NASA project involving the use of Electrical Resistance Heating ERH for treatment of source zones containing dense nonaqueous-phase liquid DNAPL or high concentrations of volative contaminants. ERH is a remediation technology that involves passing electrical current through saturated or unsaturated soil, resulting in increased subsurface temperatures usually to the boiling point of water. The soil is heated by the passage of current through the electrodes and not by the electrodes themselves. ERH increases the subsurface temperatures beyond the boiling point of the contaminants like chlorinated volative organic compounds CVOCs causing them to transition into the vapor phase to be removed through vapor recovery wells. ERH does not directly remove contaminates from the subsurface but rather it creates the changes in physical, chemical, and biological conditiosns that facilitate their removal from the subsurface or their in situ transformation to potentially non-toxic compound.
APPROVED FOR PUBLIC RELEASE