3-stage sludge dewatering plant, Russia

DiamondsDewatering & Drying

Construction of a 3-stage sludge dewatering plant for the production of stable filter cake and reduction of disposal area


Customer Alrosa, Russia

Commissioning July 2015


Feasibility study incl. laboratory tests for the production of filter cake, basic- and detail engineering, supply of equipment, supervision of mounting, commissioning, training of operating staff, after-sales-service

Scope of supply:

  • 7 chamber filter presses incl. high-pressure slurry pumps
  • 2-stage thickening including slurry pump units:
    • Hydrocyclone station “ContiClass®System” with 24 pcs. cyclones DN250
    •  Ø 16 m paste thickener with flocculant station
    • Rubber lined intermediate tank with agitator
    • Conveying systems to the truck loading bunker
    • Compressed air supply station for the cleaning of the filter cloths
    • Wear-resistant pipelines for PN16
    • Values with pneumatic drives
    • Pump station for the process water
    • Integration of the new control system in the existing plant automation

Technical data

  • Throughput of solids:  6.000 t/day
  • Operation 7 days/week 
  • Residual moisture of filter cake: 18 – 25%
  • Pressure of slurry pumps: up to 15 bar
  • Waschwasser Druck: 50 bar
  • Pressure for cleaning of filter cloths: 10 bar

    Customer benefits

      • Installation and commissioning of dewatering system without interrupting the production
      • Process water recovery up to 97%
      • Reduction of disposal site area: 5 to 6 times less than before
      • Dumping is no more applicable because of the detoxified dry cake material that is usable for road construction

      Project highlight

      Recovery of process water

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