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Water recycling in car wash installations is practical, both from an ecological and an economic point of view. Unfortunately the danger of microbiological pathogens in the washing water is underestimated too
frequently.
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Washing cars out on the street has been restricted for a long time in many communities. The reasons for the restriction were mainly ecological considerations, because the washing water contains oils, lubricants, tar, suspended matter,
heavy metals and micro-organisms, which often end up in soils and thus are a danger to the
groundwater.
Car washing that is performed directly over a Gully pollutes the environment, since the dirty washing water can rinse out into surface waters through rainwater channels.
When cars are washed by hand much more fresh water is used than in a washing plant (see lower table). |
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