A recycling system for graywater use reduces drinking water consumption and wastewater by around 30 percent. According to the Fachvereinigung Betriebs- und Regenwassernutzung, a person in the household uses about 55 liters of gray water per day. To ensure that the slightly polluted graywater produced by showering, bathing or washing with the washing machine does not find its way unused into the sewage system, it can be purified and used as clear process water.
In a graywater plant, the wastewater is separated from chemical additives and recycled. In the process, undissolved substances, such as lint, and dissolved substances such as soap residues and oils are filtered out of the water. This also applies to bacteria, germs and other microorganisms. The purified process water can then be put to good use in the household, for example for flushing toilets, watering the garden or as cleaning water. If the process water is used up, the graywater system automatically switches over and uses drinking water.
A gray water system can be well positioned in the basement or in the garden. For a single-family house, a small system with a capacity of about 300 liters of water is suitable. The recycling of gray water is environmentally friendly, because only little energy and few resources are used for the processing. It should be noted that the regulations from the Drinking Water Ordinance must be observed. For example, the gray water and drinking water require different piping systems.
Source: build.de
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