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Wastewater system

The Town’s wastewater collection system consists of over 45 km of sanitary sewers, 6 km of combined sewers, a raw sewage pumping station and a wastewater treatment plant. The plant has an average daily capacity of 14,000 m³ and a peak flow of 41,000 m³. Wastewater that leaves all homes and businesses in the Town is conveyed via gravity through the underground sanitary sewer system towards the wastewater treatment plant.

The wastewater treatment plant uses the activated sludge process as treatment. It consists of two screens, two vortex grit removal, three primary clarifiers, three aeration tanks, four secondary clarifiers and 128 ultraviolet lamps for disinfection. Once the treatment process is completed, the disinfected supernatant is discharged into the Ottawa River.

The sludge treatment consists of two aerobic digester and of one sludge stabilizer which is then thickened by two centrifuges. Once the treatment process is completed, the biosolids are dehydrated before being disposed of on approved and certified farmlands for amendments.

Did you know?

Many items cannot be poured down the sink drain or in the toilet. Why? When bonded together, they can cause clogging problems in residential sewer lines, the municipal sanitary sewers and the wastewater treatment plant. In addition, toxic products can cause harmful effects on the environment, as they cannot be 100% eliminated through the wastewater treatment process.

To avoid these situations, the following type of products should never be flushed down the toilet or poured down a drain:

  • Hygiene products (sanitary, disposable diapers, cotton balls, cotton swabs, dental floss, condoms, bandages, wipes…even those labelled “flushable”)
  • Food products (grease, fats, oil, food)
  • Household products (paint, pesticides, solvents, nail remover, cleaning products)
  • Other (hair, contact lenses, medication, cat litter, paper towel, cigarettes)

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