Our in SITU decontamination solutions
Thermal Treatment (ERH — Electrical Resistance Heating/TCH - Thermal Conduction Heating/GTR - Gaz Thermal Remediation) — (C314a)
Increase in soil temperature to increase the volatilization of pollutants and thus allow them to be recovered by venting. This technology allows in particular the treatment of Concentrated Pollution Areas (ZPC).
Vacuum extraction (ESV) or multi-phase extraction (EMP) — (C311b)
Depollution of water and soils impacted by volatile compounds (Volatile Halogenated Organic Compounds, Benzene-Toluene-Ethylbenzene-Xylenes...) in a poorly permeable environment. It also allows the recovery of LNAPL (Light Non-Aqueous Phase Liquid) or DNAPL (Dense Non Aqueous Phase Liquid).
In situ sparging or sparging (C311c)
Sparging makes it possible to treat groundwater impacted by pollutants that can be transferred from water to air. Air is injected into the table, the air is charged with polluting by rising to the surface. The polluted air is then captured by venting.
Venting or ventilating the unsaturated zone (C311a)
Soil treatment by extracting gas from the ground. Venting is effective for sufficiently permeable materials and volatile pollutants such as COHVs (Volatile Halogenated Organic Compounds) or BTEX (Benzene-Toluene-Ethylbenzene-Xylenes).
Pumping (C311d), Pumping/skimming (C311e), Pumping/stripping (C333a)
Pumping/stripping is a groundwater treatment technique that is widely used, for example, to decontaminate source areas, to create hydraulic barriers, to recover supernatants, etc. The pumped water and pollutants are then pre-treated (phase separation, filtration of Suspended Materials, etc.) and then treated for example by stripping and filtration with activated carbon or ion exchange resins.
Oxidation or ISCO (C313b)/Reduction or ISCR (C313c)
Pollutants are directly degraded by oxidation using oxidants such as sodium persulphates, peroxides, Fenton reagent, etc.
Pollutants are directly degraded by reduction using a reducing agent such as zero valent iron (ZVI).
Oxidants and reducing agents can be brought into contact with pollutants via several techniques such as:
- Soil mixing: injecting treatment into wells
- Direct push: injection under pressure
Aerobic biodegradation/Anaerobic biodegradation
Carbon substrate is injected right into groundwater to promote the anaerobic biological treatment of pollutants such as COHVs (Volatile Halogenated Organic Compounds).
Products allowing the release of oxygen are injected into groundwater to promote the aerobic biological treatment of pollutants such as HCT (total hydrocarbons) or BTEX (Benzene-Toluene-Ethylbenzene-Xylenes).