ElectroKinetic Soil Treatment

The Soil Treatment (ST) technology has been developed by EKST to remove organic and inorganic contaminants from soil. Through a combination of hydraulic pressure and electrokinetics, a custom formulated electrolyte gets passed through the contaminated soil. The electrolyte recipe is adapted to optimize transport of the contaminants of concern. A primary target market is contaminated soils associated with oil and gas wells.

The ST system can be done on site, is reliable and adaptable, and costs less than current soil remediation practices. The system is completely stand-alone including its power source. Multiple ST units can be stacked and run simultaneously to minimize the required treatment time.

  • First, an excavator unearths the contaminated soil and loads it through a soil screener to remove large rocks and debris. The results in a pile of finer soil ready to be mixed.
  • Electrolyte is prepared on site by mixing fresh water with the desired chemical composition. The used electrolyte can be treated and reused to minimize water consumption.
  • The remaining finer soil is mixed with the electrolyte to from a pumpable slurry. The contaminated soil slurry is then fed through the ST unit. The unit is composed of both a decontamination and dewatering sections.
  • In the decontamination section, fresh electrolyte from the anode chamber passes though the slurry chamber while dislodging and transporting the contaminants to the cathode chamber via electrokinetics and hydraulic forces.  
  • In the dewatering section, the anode chamber is sealed so that water is removed from the slurry into the cathode chamber. In additional to the flow inducing forces at play, the shape or the unit encourages additional dewatering of the slurry.
  • The slurry leaving the unit consisting of treated soil with a low moisture content. This entire process can be done on site, requires minimal equipment and resources, and produces a clean soil that can immediately be returned to the ground.