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Ashbridges Bay Treatment Plant Upgrade

Helping improve Canada’s second largest wastewater treatment plant

  • 818


  • 2,180

    Mld Headworks

  • Toronto, Ontario

    Toronto, Ontario

Maintaining capacity and preparing for the future

We provided project management, design, and contract administration to upgrade to the headworks facility and improve odor control at Canada’s second largest treatment plant. The grit and screening removal, conveyance, and storage systems were improved to address operational and flooding problems caused by wet weather and high solids loading events. Fine perforated plate screens now remove more material at the front of the plant and relieve stress on downstream unit processes. Extensive hydraulic modeling with InfoWorks® established system capacity ratings and bypass channel configurations.

We also upgraded one of the aeration tanks as a pilot facility for biological nutrient removal along with a diffuser pilot to minimize potential fouling. This included conversion from coarse to fine bubble aeration. The aeration tank was reconfigured with various biological environments (including anoxic, swing, and aerobic zones) to achieve year-round nitrification with oxygen and alkalinity credits from denitrification.

These improvements will help the plant maintain its capacity while meeting future effluent requirements without the need for additional secondary reactors and clarifiers.

At a Glance

Meet Our Team

Olav Natvik, Project Manager

Delivering creative treatment solutions with a triple bottom line—social, environmental, and financial—is my focus.

Oliver Ng, Senior Associate, Senior Structural Engineer

Success of an organization is through team effort and contribution. Contribution from each individual is as valuable as that from a leader.
Oliver Ng Senior Associate, Senior Structural Engineer Read More

Rob Simm, Senior Vice President, Water - Treatment

Sewage should no longer be viewed as only a waste product. From energy generation to fertilizer production, I help our clients maximize the potential of their wastewater.
Rob Simm Senior Vice President, Water - Treatment Read More

Srdjan (Sergio) Stevandic, Senior Associate

I help turn complex community needs into cost-effective, manageable, practical, and long-lasting solutions.
Srdjan (Sergio) Stevandic Senior Associate Read More

Joe Uglevich, Vice President, US Discipline Leader, Water

My experience has proven that successful teams include technical staff, clients, and stakeholders working together towards a common goal.
Joe Uglevich Vice President, US Discipline Leader, Water Read More
  • Olav Natvik

    Project Manager

  • Oliver Ng

    Senior Associate, Senior Structural Engineer

  • Rob Simm

    Senior Vice President, Water - Treatment

  • Srdjan (Sergio) Stevandic

    Senior Associate

  • Joe Uglevich

    Vice President, US Discipline Leader, Water

We're better together

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  • Design your career

    Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.

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