A project to capture waste biogas from treating sewage will cut the Region of Waterloo in Canada’s electricity bills by millions of dollars and reduce greenhouse gases.

The project, in the state of Ontario, will use the biogas that’s produced at the region’s three largest sewage treatment plants to generate electricity and heat the buildings. Some of that gas is now used as part of the sewage treatment process, while the rest is burned off.
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The Record website reports that by mid-2020 it will produce about 12,000 megawatt-hours of electricity every year, which is the amount of electricity used by 1,200 houses per year.

The largest plant, at 368 Mill Park Dr. in Kitchener, will see its power bills cut by 60 per cent, while bills at the other two plants, 230 Water St. S. in Cambridge and 340 University Ave. E. in Waterloo are expected to decrease by 40 per cent.

This project is expected to save the region almost $17 million in electricity bills over the next 20 years, and is expected to pay for itself in about nine years, Law said.

The three biogas cogeneration plants combined would reduce emissions by about 550 tonnes of carbon dioxide each year, equivalent to taking around 115 cars off the road.