What are the main differences between ERH and thermal conduction heating or ISTD?
Both technologies use electricity and heat the subsurface; however, they really don’t have much in common and are rarely considered to be competing technologies. Fundamentally, the TRS ERH process is simple and highly flexible. ERH is an in situ thermal remediation technology that uses the heat generated by the resistance of the soil matrix to the flow of electrical current to raise subsurface temperatures up to the boiling point of water (212°F or 100°C). ERH electrodes do not get any hotter than the rest of the soil – the electrodes direct electrical current into the proper subsurface depth interval that you desire to heat. During ERH volatile compounds transition to the vapor phase and are captured by a vapor recovery system. ERH is equally effective in saturated and unsaturated soils. Subsurface heating may be used for a variety of remedial purposes including contaminant volatilization, in-situ steam stripping, enhancing soil vapor extraction efficiency, and increasing biological d
