Electro Thermal Dynamic Stripping Process (ET-DSP™)
Leaders in advanced techniques for in-situ thermal remediation:
Technology DescriptionThe Electro-Thermal Dynamic Stripping Process, or ET-DSP™, is an in-situ thermal soil decontamination method that combines the three treatment methods of electrical resistance heating, thermal conduction, and steam / hot water injection. The vaporized contaminants can then be mobilized and removed from the soil using vapour extraction techniques. ET-DSP™ takes advantage of the electrical resistive properties of soil creating conditions of increasing temperatures in an underground formation to a sufficiently high level thereby driving contaminants to separate from soil particles. Electrodes are installed in shallow wells throughout the contaminated soil and groundwater volume. The electrode array is connected to a Power Delivery System Unit, that uses standard, readily available three phase power from the grid. The process begins by passing current between electrodes causing the soil temperature to rise. This increased temperature results in the volatilization of contaminant compounds into the vapour phase. The vapour mass can then be removed from the soil with vapour extraction techniques. Comprehensive computer controls are used to regulate and optimize the thermal response of the target formation. |
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Benefits of ET-DSP™ |
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Treatability (Bench Scale) TestsMcMillan McGee (Mc2) aims to provide clients with a solution and predictable results even before setting foot on a project site. This is accomplished through conducting comprehensive soil analyses, bench scale tests, engineering design and simulations. Important preliminary work is usually necessary to provide greater efficiency for clients through predictability of outcomes and vastly improved cost control. Bench scale tests entail application of the ET-DSP™ process to a small volume of soil in a carefully controlled laboratory environment that simulates field conditions. These tests allow us to determine static and dynamic electrical properties, predict phase behaviour during electro-thermal processes, volatility characteristics, material flow, and thermal properties. Engineering design entails a three dimensional engineering plan outlining optimal electrode and extraction well placement (distance and depth), location of surface facilities, piping and wiring, soil lithology and power input specifications -- all with the objective of achieving optimal temperature targets within the allotted time. ResourcesTechnical Papers & Case Studies
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