Canadian Company Extracts Heat From Raw Sewage

International Wastewater Systems of Burnaby, British Columbia, is putting its own twist on the recovery of heat from sewage and wastewater. The company’s SHARC system employs sewage filtration to ensure that heat recovery works equally well for both raw sewage and wastewater. The system is also scaleable, from smaller multi-dwelling buildings to larger installations that can tap the heat from municipal sewer systems.A study conducted by the U.S. Department of Energy in 2005 estimated that 350 billion kilowatt-hours of heat energy disappears down the country’s drains each year. With the help of a heat exchanger, the SHARC system can capture