Journal of Commerce
Wastewater heat recovery systems are often linked to larger treatment facilities or energy districts, but SHARC Energy Systems, located and manufactured in suburban Port Coquitlam, B.C., has developed the PIRANHA T10, a small scale unit that can be installed in multiple urban residential buildings (MURBs) as small as five to 10 units as well as single ICI sector buildings.
The units work on the same principle longed-used in green buildings where heat is captured before spent air in vented out of the building. Only instead of occurring at the top of the building, the system works at the bottom, capturing heat from spent wastewater. The units can be used in a wide range of applications, co-founder Lynn Mueller said.
“Anywhere there is a lot of hot water used,” said Mueller, whose company has installed 25 of the SHARC large-scale units and 20 PIRANHA units in Canada, the U.S. and abroad.
The PIRANHA unit returns wastewater heat to a building to be used to reheat new hot water for in-house use. It becomes an endless cycle, said Mueller.
Units have been installed in MURBs in Vancouver and Burnaby, commercial outlets such as the Lake Louise Inn’s laundry, where energy for hot water was reduced 45 per cent, and recently Richmond laundry WashOut, a commercial laundry service with strong environmental concerns, signed a rebate agreement with FortisBC for the installation of a unit. WashOut is projected to save over 2,100 gigajoules per year of natural gas, saving 105 tonnes of greenhouse gas (GHG) emissions annually.