Country: Canada
Key Area: Water
Services: Wastewater Treatment

Opus DaytonKnight in partnership with DEC Design designed and are currently implementing the thermal energy from an effluent system at the Saanich Peninsula Wastewater Treatment Plant. The project consists of a low temperature district energy sharing system that recovers heat from the wastewater treatment plant and circulates the heat through a two pipe closed loop system to the surrounding facilities. These facilities include an existing pool, school, residential neighbourhood, greenhouses, and the waste water treatment process building. This type of system will displace the consumption of natural gas and is projected to reduce GHG emissions by over 95% compared to conventional heating technologies. The first phase of the district energy sharing system—distributing reclaimed heat to the recreation centre pool--was commissioned in June 2011. In the first four months of operation, the system delivered 173 MWh of recovered heat from the effluent, saving 32 tonnes of CO₂ equivalent GHG emissions.  The net annual savings in the first year of operation are projected to be $77,000 with a further $14,000 saving in Greenhouse Gas Credits for a total annual savings of $91,000.

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