Sludge stabilization

Since sludge may contain heavy metal ions and pathogens and because its odour can cause discomfort, stabilization of sludge may be necessary.

Stabilization of sludge

Lime is used to stabilize sludge, as it helps to hold heavy metal ions in an insoluble form, to eliminate pathogens and fermentation, and to reduce odors. The sludge must be thoroughly and evenly mixed with lime. Dosing and mixing are critical and require special attention. DOT.COMPOST® is Waterleau’s way of stabilizing sludge using lime.


  • When sludge is permitted to be accepted as fertilizer
  • Elimination of pathogens
  • Preventing fermentation
  • Odour reduction
  • Keeping heavy metals in insoluble form


© Waterleau T +32 16 65 06 57