At GPC Clear Solutions Limited, we have put our expertise and understanding into a product called ‘PolyClay’. It has proven successful when used in the following fields:

  • Inks
  • Paints
  • Latex
  • Dyes
  • Oil and Grease
  • Suspended Solids
  • Metals
  • Non-soluble BOD & COD (PolyClay does not remove soluble BOD/COD such as sugars, soluble oils and solvents)

The differences between Conventional Chemistry and PolyClay

Conventional Chemistry


Requires multiple process stages Is often a 1 step process
Frequently unable to dewater sludge with a filter press Sludge can be dewatered using a filter press and without a filter aid
A filter aid is commonly required to dewater sludge resulting from the treatment of ink effluent Non-leachable sludge
Substantial labour savings compared to conventional chemistry
Filter cakes are typically only 20 – 40% solids with a filter press Filter cakes are typically 50 – 60% solids with a filter press
Sludge typically fails non-hazardous classification Lower capital equipment cost required
Light floc and slow settling Heavy floc and settles quickly



  • removes oil & grease, heavy metals and suspended solids
  • is very effective with ink and paint effluent
  • reduces BOD & COD loading to a biological plant
  • also dewaters sludge to more 50% solid content using a filter press
  • can be the best technology for effluent flows 100m³ or less per day
  • can reduce the complete cost of treatment

To find out more about PolyClay or to improve plant performance, please fill in our enquiry form.


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