Wastewater treatment plants (WWTPs) treat and purify wastewater. Wastewater is water that has been polluted through activities such as cooking, doing laundry or showering and then transported through a sewer system. The average temperature of wastewater is between 10 and 20 °C. A heat pump can recover this heat in order for it to be used as a heat source in a district heating network.
The map shows the heat potential of WWTPs in Switzerland.
