City Plans to Use Sewer Heat to Power Homes

Many types of man-made geothermal energy systems exist around the world. But using heat trapped in sewers, which can build up from dishwasher waste or hot showers, is less common. The system will use technology similar to geothermal heating and cooling systems, but could potentially be less expensive because sewer water is already in the right temperature range (between 42 and 66 degrees Fahrenheit) and much of the infrastructure is already in place.

Full Story: http://www.govtech.com/technology/City-Sewer-Heat-Power-Homes.html