A graywater recycling plant can save up to 70 liters of water per capita every day. The graywater recycling plant stores, filters and cleans the contaminated wastewater produced by showering, bathing or washing hands. The used wastewater, which is free of fecal matter and only slightly contaminated, is called graywater or service water.
On the one hand, a graywater recycling plant can reduce water consumption in the household and save costs. On the other hand, the water supply in the community can be improved. This is because, due to the increasingly rising water consumption in households and the simultaneous sealing of surfaces, flooding and overloading of the sewage system can quickly occur during heavy rainfall, for example. This also has an impact on the community's wastewater costs.
The treated graywater from the recycling plant can then be used for flushing toilets, doing laundry or cleaning, and maintaining the garden. A graywater recycling system costs around 5,000 euros without installation and can be co-financed, for example, with the "Housing modernization" subsidy program of the Kreditanstalt für Wiederaufbau (KfW). A wall height of at least 2.15 meters is required for installation of the system in the basement.
Source: energy saving in the household
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