Client: Utilities Kingston
Location: Kingston, Ontario
Size: 95 MLD average day flow

J.L. Richards & Associates Limited (JLR) was retained for a $115M upgrade to the Ravensview Wastewater Treatment Plant (WWTP) in the City of Kingston (City). Known today as one of the most significant municipal projects in the City’s history.

Providing project management, engineering, architectural, and planning services, JLR’s work included the preparation of an Environmental Assessment (EA), followed by on-site piloting of the preferred secondary treatment technology, detailed design, construction contract administration, and commissioning oversight. Plant operations were maintained throughout the multiyear project, and the plant’s performance to date has exceeded expectations and all regulatory requirements.

Kingston’s vision to be Canada’s most sustainable city was embraced through environmental stewardship, energy management, and sustainable design of the WWTP. Highlights of the project include:

  • LEED Silver classification for the administration building.
  • Connected electrical load reduced by 0.6 megawatts during normal operation through high efficiency turbo blowers and a 375 kW cogeneration system using biogas produced through the treatment process.
  • Enhanced sludge stabilization at 55°C to improve biosolids quality and maximize the cogeneration process (sludge stabilization mirrors the USEPA requirements for Class ‘A’ biosolids and exceeds Ontario’s current requirements).
  • Biostyr® biological aerated filters (BAF) for secondary treatment, one of the largest installations of its kind in North America, to minimize the project’s footprint and enable an ecologically valuable woodlot to be preserved.
  • Indoor biosolids storage operating under negative pressure to mitigate odour impact and improve the quality of life for nearby residents.
  • Indoor biosolids storage operating under negative pressure to mitigate odour impact and improve the quality of life for nearby residents.

Other upgrades included modifications to the existing screening, degritting, and primary treatment facilities; a new primary effluent pumping station to convey flow to the secondary treatment process; a new biosolids dewatering facility with two high capacity centrifuges; and a new, fully automated supervisory control and data acquisition (SCADA) system. The upgrade was completed approximately 10% under budget and six months ahead of schedule. The plant’s rated capacity is 95,000 m3 per day.

The Ravensview WWTP won an Award of Excellence from the Association of Consulting Engineers of Canada and Canadian Consulting Engineer magazine in 2010. That same year, it was also awarded the prestigious Willis Chipman Award from Consulting Engineers of Ontario.

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