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Oil Sludge Treatment


As a result of the manufacturing processes at refineries, an oily sludge is created, which must be treated. By dewatering the sludge and thus reducing the volume major savings in burial costs can be achieved.

Oil sludge contains the following elements:

  • Oil/ TPH - Total Petroleum Hydrocarbon
  • Water
  • Solids

A high concentration of TPH in the sludge defines it as hazardous and mandates removal to a hazardous waste dump site.
Using specialized dewatering technologies adapted to the needs of the client, it is possible to significantly reduce the volume of sludge, and recycle oil and water for the refinery. After a solidification process it can be transported to and disposed of at a regular dump site.
In some cases where after dewatering a high concentration of TPH and/or heavy metals remains in the sludge. In order to make the sludge non-hazardous and recycle the maximum amount of oil a thermal treatment processes can be performed on the sludge.

Treating Sludge using the Thermal Desorption System

Thermal "vaporization- condensation" treatment is the most advanced phase in the treatment of industrial sludge, which includes oils (hydrocarbons) and heavy metals as well as polluted soil. The thermal desorption system is designed for the maximum separation between solids and liquids through the vaporization- condensation process. The process includes controlled vaporization of the liquids in the sludge using an oven that horizontally mixes the sludge at a temperature of up to 4000C.
At the end of the process, completely dry and hydrocarbon (TPH) free solids remain. The solids that are reduced to a very small volume are treated with a solidification method that prevents the runoff of pollutants such as heavy metals. The solidification process allows for the disposal of solids at regular burial sites. This method is also suitable for sludge's from chemical processes.
The technology can also be used to treat oil-polluted soil.

Advantages of using the vaporization- condensation process:

  • The method allows for the recycling of materials such as oils, mercury, etc.
  • Complete separation between solids and liquids.
  • Minimization of the volume of solids designated for removal.
  • Controlled work environment that prevents the release of pollutants into the environment.
  • Solidification of waste allows it to be removes to regular burial sites.

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