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BTD head

The Batch Thermal Desorption [BTD] process utilises infrared heating elements to heat the contaminated soil.  It operates at soil temperatures up to 550ºC and uses vapour pressures created by the infrared heat to drive (or boil) the organic contaminants from the soil. 

Each stainless steel batch unit (hot box) is extremely compact: 1.8m x 3.6m x 1.5m which corresponds to a capacity of ~10 m3 or 15 tonne of soil.

The BTD process requires no burners, blowers or vacuums and as such has a very small off-gas volume.

M1-12-Quench

Off-gases are treated to world’s best emission standards using a conversion chamber, rapid quench and acid gas scrubber.

The off-gas treatment train can be modified if the client desires or the project requires, for condensation and collection of the contaminant. This would typically require further offsite treatment of the collected waste.

diagram

One to six (No.) units can be powered off the one electrical supply source (mains transformer or 500 KVA diesel generator). 

Soil batches require 24 to 72 hours to treat depending on the contaminant and it’s starting concentration.

With six units operating in parallel, 180 to 270 tonnes of soil can be treated per week.

 

 
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M1-12
 

Batch Thermal Desorption [BTD] technology…

  • is an innovative thermal desorption (infrared, not incineration) remediation technology; which
  • has been proven in a number of applications; and
  • is capable of treating a wide range of materials including: clays, soils, sediments, sludges contaminated with a variety of chemicals like petroleum products, pesticides, chlorinated solvents, PCB’s, gasoline, diesel, heavy oils, and polycyclic aromatic hydrocarbons (PAHs) and mercury.

BTD head

Extensive soil analysis and laboratory scale treatment of a client's contaminated soil can be undertaken 'in-house' using the M1-1kg unit (see accompanying figure).

This small lab scale unit is designed and constructed on the same basis as the full scale 15 tonne units but given its' size is highly valuable in allowing detailed assessment and characterisation of a site's soil before the large scale units are mobilised.

M1-1kg