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Client : Régie d’assainissement des eaux du bassin de Laprairie (RAEBL)

Date : 2014

City: La Prairie

Country: Canada

Cost : 30 M$

Upgrading of the La Prairie water treatment plant

Upgrading of the La Prairie water treatment plant

  • Project Portfolio Management
  • Procurement and contracts
  • Audit and review process

The Régie d’assainissement des eaux du bassin de Laprairie (RAEBL— Laprairie Basin Water Treatment Department) treats wastewater coming from the cities of Candiac, Delson, La Prairie, Sainte-Catherine and Saint-Constant. With these areas becoming increasingly developed and new waste management requirements being implemented, the RAEBL must perform updates and standards-compliance upgrades to its plant, which uses an activated sludge treatment process involving extended aeration. One of RAEBL’s objectives is to reduce operating costs by producing stabilized granular sludge for agricultural use.

The work plan includes:

  • Adding a process for sludge biomethanization, conditioning and drying;
  • Using ozone to disinfect effluent;
  • Phosphate removal;
  • Improved aeration;
  • Odour treatment.