In Situ Thermal Technology


Patented heating process: Uniform temperatures to 100°C: Electrical heating. Conductive heating. Convective heat transfer.

  • Advanced electrode design
  • Power Delivery System & Water Circulation System
  • Electrical safety: Perfect safety record
  • Automated & regulated process control:
    • Inter-Phase Synchronization - IPS
    • Time Distributed Control - TDCM
    • Real-time monitoring – Remote access

Dissolved phase recovery

= Mobility improvement : NAPL recovery

Vapor Pressure / Henry's constant
Stripping / Vapour recovery

Increased permeability 
Decreased sorption bonds

ET-DSP is eaqually effective in both the VADOSE & SATURATED ZONES

  • Wide range of organic contaminants: chlorinated solvents, hydrocarbons, BTEX, PAH, creosote...
  • Ideally suited to extreme conditions
    • Source of contamination: L&DNAPL
    • Vadose and saturated zones
    • All types of lithology: clay, sand, silt, peat...
    • Creation of secondary porosity in impermeable lithology (clay)
    • Heterogeneous lithology: interbedded layers – lenses
    • Deep contamination (>20m)
  • More than 95% of contaminant mass reduction (VOC)
  • Rapid Treatment: 6 to 8 months duration
  • Safety Performance: zero recorded accidents

Scope of Application

  • Temperature max 100 °C
  • Average required energy 250 kWh/m3
  • All of organic contaminants : TPHs, PAH, HVOC, creosote,...
  • All of geologies with electrical resistivity < 500 Ω.m
  • Groundwater velocity < 0,3 m/j

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