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Mercury Soil Remediation by Ex-Situ Thermal Desorption

Large-scale remediation of mercury-contaminated soil in Ritsona, Greece, using Ex-Situ Thermal Treatment (ESTT). The project successfully achieved the remediation objectives within the planned schedule, demonstrating the efficiency of thermal technology for mercury-contaminated industrial sites.

SITE DESCRIPTION

          Thermal technology

  Ex-Situ Thermal treatment 

       Main contaminant

Mercury (Hg) and TPH 

        Site challenges

  Industrial soil contaminated by mercury from historical waste handling, requiring high-temperature treatment to achieve stringent cleanup targets.

        Project Timeline

from 2025 



SOLUTION

          Treatment Method

Ex-Situ Thermal Treatment (ESTT) 

          Treatment program

Thermal treatment of the contaminated soil using Smart Burners, heating tubes and a vapor extraction network.  

         Contaminated Vapors                          Management

  Vapors collected through extraction tubes and treated using a Vapor Treatment Unit (VTU), Condensate Treatment Unit (CTU) and Granulated Activated Carbon (GAC).

       Process control

Continuous monitoring of temperatures, pile pressure, process gases (CO, CO₂, O₂, NOx, SO₂, hydrocarbons, CH₄) and mercury emissions throughout the treatment.  


RESULTS

✅           Mercury-contaminated soil successfully remediated.

✅           Target temperature of 330°C achieved throughout the                            treatment pile.

✅            Mercury concentration reduced beyond the clean-soil target                 set for the project.




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