Basically, a certain temperature level is necessary. Municipal wastewater typically has temperatures of 10 - 25 °C, which allow ideal operation of a wastewater heat exchanger. To avoid excessive fouling of the heat exchanger, pre-screening of coarse solids (> 6 mm) is recommended.
Various options for wastewater heat utilisation
Basically, there are three places where wastewater use is possible.
In buildings
Here, the wastewater generated in the building is used directly for heat utilisation. The advantage of high wastewater temperatures is offset by disadvantages such as reduced water quantities, fluctuations in the time of day and high operating costs.
Wastewater from the sewer system
With the HUBER ThermWin process, wastewater flowing in the sewer system can be used as a heat source (heating) but also as a heat sink (cooling).
Sewage treatment plant effluent
Here, the treated effluent at the outlet of the sewage treatment plant is used as a heat source. This is where the largest amounts of water are available, and if there are consumers for the heat, the installation of a HUBER Heat Exchanger RoWin in the outlet of the sewage treatment plant is an option here.
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