Electro-Thermal Dynamic Stripping Process (ET-DSP™)
Rapid, Uniform Heating Across Variable Resistivity.
ET-DSP™ is VIYA’s proprietary electrical resistance heating system. It delivers uniform heating throughout the treatment volume, enabling controlled mobilization and recovery of VOCs, SVOCs, NAPLs, and mixed-contaminants despite variable subsurface conditions.
Why Teams Choose ET-DSP™
Rapid
Heat is generated throughout the treatment volume, supporting faster, more uniform temperature increases.
Uniform
Independent control by treatment interval balances heating across variable resistivity and subsurface conditions.
Efficient
Feedback control and recirculation cut wasted energy versus other ISTR methods.
Safe & Proven
Safely deployed on over 150 sites around the world.
Where ET-DSP™ Excels
Built for Heterogeneous Subsurface Conditions
ET-DSP™ is an in-situ thermal remediation solution, making it well suited for complex source zones where difficult geology, limited access, or active-site constraints make excavation and other disruptive remedies impractical.
Complex Contaminants
- PAHs Petroleum hydrocarbons (PHCs/TPH), including BTEX and PAHs
- Chlorinated solvents and other CVOCs
- VOCs and SVOCs
- LNAPL and DNAPL source zones
Challenging Site Conditions
- Low- to moderate-permeability soils, including clay, silt, silty sand, and interbedded soils
- Heterogeneous geology with variable resistivity
- Treatment zones spanning both vadose and saturated zones
- Active or constrained sites with buildings, utilities, or other infrastructure
- Shallow, deep, or vertically extensive contaminant source zones
Constrained Environments
- Source-zone treatment beneath occupied buildings or infrastructure
- Tight footprints or schedule pressure
- Source zones where previous remedies have underperformed
- Sites requiring accelerated mass removal
How It Works
Energy-Efficient Heating with Independent Control
ET-DSP™ turns the subsurface into the heating element. By combining electrical resistance heating, conduction heat transfer, and convective steam flow, the system generates heat in situ and distributes it throughout the treatment zone, even across variable geologic conditions.
This level of control directs energy where and when it is needed, then reduces input as each interval reaches its target temperature. The result is faster remediation, lower energy consumption, and less wasted heat than with uniform, one-size-fits-all thermal treatment.
VIYA manufactures, owns, and operates its own ET-DSP™ equipment, with safety engineered into every system through UL 508A-listed assemblies, certified components, interlocks, redundant emergency shutdowns, and site-specific electrical protection.
Power Delivery System (PDS)
Delivers precisely controlled electrical power to individual electrodes, allowing power input to be adjusted by location and depth as subsurface conditions change.
Water Circulation
Injects conditioned water, recovers extracted water, treats it, and recirculates it to the electrodes.
Treatment system
Extracted vapor and liquid streams are cooled, separated, and treated through a site-specific process train designed around the contaminants, flow rates, and discharge requirements.
Temperature Sensors
digiTAM™ temperature sensors provide continuous, real-time subsurface temperature data, giving operators the feedback needed to adjust electrode power and water injection as conditions change. Project data is available remotely through the ET-DSP™ web-based control system.
Multi-Phase Extraction (MPE)
Simultaneously recovers vapor, free product, and groundwater from a single well, reducing infrastructure, cost, and site footprint.
Electrodes
High-frequency, distributed control; power and water are tuned at each treatment interval as measured conditions change.
Power Delivery System (PDS)
Delivers precisely controlled electrical power to individual electrodes, allowing power input to be adjusted by location and depth as subsurface conditions change.
Water Circulation
Injects conditioned water, recovers extracted water, treats it, and recirculates it to the electrodes.
Treatment system
Extracted vapor and liquid streams are cooled, separated, and treated through a site-specific process train designed around the contaminants, flow rates, and discharge requirements.
Temperature Sensors
digiTAM™ temperature sensors provide continuous, real-time subsurface temperature data, giving operators the feedback needed to adjust electrode power and water injection as conditions change. Project data is available remotely through the ET-DSP™ web-based control system.
Multi-Phase Extraction (MPE)
Simultaneously recovers vapor, free product, and groundwater from a single well, reducing infrastructure, cost, and site footprint.
Electrodes
High-frequency, distributed control; power and water are tuned at each treatment interval as measured conditions change.
Power Delivery System (PDS)
Water Circulation
Treatment system
Temperature Sensors
Multi-Phase Extraction (MPE)
Electrodes
Choosing the Right Path
The Right Technology Starts With the Right Assessment
No two contaminated sites are alike. ET-DSP™ performs well across a broad range of conditions, but the right remediation approach depends on the site. Our role is helping identify and execute the option that delivers the strongest combination of treatment performance, schedule certainty, cost control, and site-specific feasibility.
Explore other remediation approaches based on your site's conditions.
High Permeability, Discrete sources
Where steam can move readily through permeable soils, SEE can provide rapid, efficient heating and contaminant recovery.
Metals & Thermally Stable Contaminants
Contaminants that cannot be volatilized or thermally degraded may be better addressed with chemical, biological, or stabilization technologies
Bedrock & Higher-Temperature Treatment
Where bedrock or contaminants require temperatures beyond the practical range of ERH, TCH / IT-DSP™ may be the better thermal approach.
Case Studies
ET-DSP™ in Action.
Proven Results.
ISTR in an Urban Area Beneath an Overpass
- Drycleaner / Laundromat
- Nebraska,
- USA
Complex Hydrocarbon & PFAS ISTR at Across Nine Impacted Areas
- Oil & Gas
- California,
- USA
ISTR Beneath Active Operations
- Industrial / Manufacturing
- Indiana,
- USA
Talk to VIYA
Is ET-DSP™ the Right Thermal Solution for Your Site?
Every remediation project begins with understanding the site. Our team evaluates geology, contaminants, treatment objectives, and site constraints to determine whether ET-DSP™, IT-DSP™, SEE or an integrated approach will deliver the best outcome.