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Les 10 étapes du traitement de l'eau potable - Programme PEXEP
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Les 10 étapes du traitement de l'eau potable - Programme PEXEP

Water Treatment Process in Trois-Rivières

Overview of Water Quality Standards

  • Trois-Rivières' drinking water quality exceeds government standards, achieving a three-star certification for excellence in potable water.

Step-by-Step Water Treatment Process

Step 1: Water Intake

  • The city sources its raw water from the Saint Maurice River, initiating the treatment process.

Step 2: Screening

  • A screening process occurs before entering the treatment facility to remove large debris like branches and leaves, protecting equipment.

Step 3: Flocculation and Sedimentation

  • Coagulants are added to create flocs—aggregates of suspended particles—which settle due to gravity during sedimentation.

Step 4: Chlorination

  • Chlorine is injected at the basin's entrance to eliminate remaining microorganisms, ensuring initial disinfection.

Step 5: Filtration

  • Filters capture remaining suspended materials; backwashing is performed regularly to maintain filter efficiency.

Step 6: UV Irradiation

  • Filtered water passes through UV lamps that emit germicidal rays, effectively killing bacteria present in the water.

Step 7: Post-Treatment Adjustments

  • Various chemicals are added post-filtration:
  • pH correction with sodium hydroxide.
  • Removal of tastes and odors using chlorine dioxide.
  • Zinc phosphate is added to reduce corrosion in distribution networks.

Step 8: Storage

  • Treated water is stored underground for daily consumption needs and emergency situations like fire fighting.

Step 9: Final Chloramination

  • Before distribution, chloramines are introduced to preserve water quality over long distances while minimizing by-products and taste issues.

Step 10: Distribution Monitoring

  • The treated water is pumped through distribution pipes where it undergoes continuous analysis and monitoring to ensure consistent quality until it reaches consumers.
Video description

Saviez-vous que l’eau potable de Trois-Rivières est deux fois supérieure aux critères gouvernementaux? Eh bien oui, l’eau potable suit un processus rigoureux de traitement des eaux. Tous les 4 heures, des analyses sont effectuées aux différentes étapes du procédé. Le laboratoire de l’usine permet un suivi complémentaire et supérieur aux analyses exigées par le Règlement gouvernemental sur la qualité de l’eau potable.