ERH Electrode Design
TRS has developed an adaptive, bored electrode with co-located vapor recovery wells. Advantages of our design include:
- Multi-element electrodes allow independent control of energy into discrete subsurface intervals.
- Patented backfill reduces the local resistance in the formation.
- Electrode boreholes are made with standard drilling techniques, including hollow stem auger.
TRS assembles the electrode components in the field, allowing modifications based on changing site conditions,
as the resistivity of the matrix changes, as temperature increases.
- Overlapping vacuum influence captures steam and vapors.
Electrode installation in the saturated zone requires no water addition. Therefore, TRS generates little wastewater,
dramatically reducing treatment costs.
TRS has installed angled electrodes that are up to 14 degrees off horizontal to work around subsurface utilities
and below buildings, rail lines and roadways. Advantages include:
- Remediation design flexibility
- Avoid disrupting operating facilities
- Overlapping vacuum capture of steam and vapors
Although a bit more expensive than angled electrodes, TRS has deployed horizontal electrodes, allowing complete access
beneath occupied facilities.
Further, TRS has installed sheet pile electrodes with great success. Interestingly, we can use existing sheet pile walls,
reducing costs. Advantages include:
- As sheet piles have a large surface area, using them is very energy efficient.
- Installation can be two to three times faster than installing bored electrodes.
- Installation virtually eliminates exposure to vapors and groundwater.
- We can remove and recycle the sheet piles upon project completion.
- We can eliminate drill cuttings and the requisite disposal and treatment.
There are significant cost savings realized through speed of installation, lower electrode density,
reduced exposure to contaminants, elimination of drill cuttings and reuse of the sheet piles.
TCH Heater Well Design
TRS has two patent-pending inventions for the design of our heater wells. Descriptions follow.
FlexHeater™ Technology: A Slinky-like, coiled wire is installed into steel pipe. The greater the coil density,
the hotter the casing. Temperatures can be adjusted vertically at discrete intervals and using 2-inch direct push
casing, making it faster and less expensive.
HybridHeater™ technology: Provides ERH and TCH in a single borehole, allowing TRS to target energy delivery,
affording an efficient, low-cost remediation solution.