Contaminated soil purification system

  • This soil purification system cleans and classifies excavated soil on site into large gravel/sand and fine silt/clay.
  • Since the system is operated on site:
  • 1. Secondary pollution can be minimized.
  • 2. Waste production can be minimized.
  • This is an environmentally-friendly treatment system.
  • This system can also be used to treat contaminated bottom mud produced during dredging operations.

Contaminated soil purification system

Main features

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Application range Various contaminants, including heavy metals and mineral oils,
can be treated.
Onsite treatment Because the treatment can be conducted onsite,
transportation costs can be reduced and secondary pollution,
such as CO2 emissions from transport vehicles,can be prevented.
Minimum use of water Since cleaning water is recycled, the use of water can be minimized.
Reduction of waste byproducts Contaminated soil is classified and treated,
and the treated soil is backfilled.
So, waste byproducts can be greatly reduced.
Reduction of disposal volume Clay containing contaminants is dehydrated and reduced in volume,
so that final disposal volume is further reduced.

Process flow

Process flow

Configuration of main equipment

Configuration of main equipment
1. Belt feeder
Supplies regular amounts of soil stably.
2. Mud dissolver
Washes clay away from the surface of sand and gravel, and makes clay lumps dissolve in water.
3. Primary and secondary treatment devices
Primary treatment
Classifies, treats and collects sand and gravel of 1-100 mm.
Secondary treatment
Lower: Classifies, treats and collects sand and gravel of 0.5-1 mm.
Upper: Classifies and collects fine sand of 0.075-0.5 mm.
4. Wet cyclone
Wet cyclone
Classifies fine sand, silt and clay using centrifugal force.
5. Coagulation-sedimentation equipment
Coagulation-sedimentation equipment
Separates treated wastewater into supernatant water and sludge, and concentrates silt and clay.
6. Filter press
Compression filter press
Dehydrates sludge and makes the silt and clay cakey.