Soil decontamination

SUEZ is a leader in innovative technologies and processes for the treatment of contaminated soils, minimising their environmental impact and creating significant potential for reuse.
Sustainable soil solutions

Australia’s only facility for zero residue treatment of contaminated soils

The SUEZ Ventia Contaminated Soil Processing Facility in Melbourne’s south east is an EPA-approved, low cost solution for the safe treatment of organic and inorganic contaminated soils.
The SUEZ Ventia Contaminated Soil Processing Facility is a partnership between SUEZ and Ventia and harnesses the extensive expertise of both partners. SUEZ owns and operates Victoria’s only landfill licenced to receive category B solid Prescribed Industrial Waste, while Ventia has delivered more than 140 successful and highly complex remediation projects across Australia over the past two decades.

The facility accepts material 24 hours a day, five days a week, using safe and proven processes to remove both organic and inorganic contaminants. For organic contaminants such as oils, tars, petroleum residues, pesticides and munitions, thermal desorption employs heat to vaporise the contaminants into a gas stream, leaving soil ready for conversion into clean fill for beneficial reuse. Inorganic contaminants such as mercury, lead, arsenic and chromium are mixed with binding agents such as cement or lime in a stabilisation immobilisation process, reducing leachability and lessening danger to human and environmental health.

Both processes are designed to leave zero residues for optimal reuse of soils, with residual waste sent to an on-site smart cell® where it contributes to the generation of renewable energy.
The thermal desorption process

How do we remove organic contaminants from soils?

  1. Soil is screened and crushed to produce a uniform feed.
  2. Soil is heated to around 450°C to separate contaminants from the soil.
  3. The ‘desorbed hydrocarbon gases’, heated to above 930°C, are converted to carbon dioxide and water.
  4. The converted gases are rapidly cooled to control reformation and allow particulate removal.
  5. A fabric filter baghouse allows particulate removal from the gas stream. The fines are returned to the pugmill.
  6. The acid scrubber acts as a final polishing step to the gas stream by neutralising the acid gases to produce salts.
  7. Fines are recombined in the pugmill and the soil product is cooled using scrubber water.

For more information, download our Sustainable Soil Solutions brochure: