Geothermal heat exchangers almost always use condenser water or glycol as the heat transfer medium — and, sometimes, refrigerant. Wastewater heat recovery systems typically preheat domestic cold water ...

Heat recovery from wastewater exploits the latent thermal energy carried by domestic, commercial and industrial effluents to displace conventional heating and cooling demands. Wastewater temperatures ...

DENVER — When a massive event center was being developed in Denver, planners had to contend with two existing 6-foot-wide sewer pipes that emptied into the river, creating an unsightly dilemma.

Wastewater heat recovery system in action at a factory in Zambia. Courtesy Eleanor Mancusi-Ungaro Zambia wants to cut its national greenhouse gas emissions almost in half by 2030. But its 8th National ...