ERH is an in situ, thermal technology that uses commonly available electricity and applies it to the ground through electrodes, which we typically space about 15 feet apart. TRS can install electrodes vertically to virtually any depth or at angles (even horizontally) underneath operating buildings and in the presence of buried utilities. The technology is equally effective in soil and groundwater.
The natural resistance of the matrix to the flowing electricity gently and uniformly raises the temperature of the treatment volume. It usually takes about 30-45 days to reach steaming temperatures. The elevated temperatures vaporize the VOCs and the steam acts as a carrier gas that transports the vapor phase contaminants to the vadose zone, where TRS captures the vapors and treats them at the surface.
First commercially deployed in 1997, the technology is suitable for a variety of applications, including chlorinated solvents and petroleum hydrocarbons, even in the presence of light or dense non-aqueous phase liquids (LNAPL and DNAPL, respectively) in most types of stratigraphies and lithologies. TRS ISTR sites often receive closure status.
The TRS Electrical Resistance Heating process utilizes carefully controlled electrical current and powerful extraction pumps to vaporize and then extract pollutants. See Demo
TRS Electrical Resistance Heating (ERH)