Books > Science & Mathematics > Biology, life sciences > Life sciences: general issues > Ecological science, the Biosphere
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Discovery Miles 7 100
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Greywater is wastewater generated from domestic activities such as
dish washing, laundry and bathing. Greywater comprises 50-80% of
residential wastewater generated from all of the house's sanitation
equipment except for the toilets. Water from the toilets is
designated sewage or blackwater to indicate it contains fecal
matter and urine. Greywater gets its name from its cloudy
appearance and from its status as being neither fresh (white water
from groundwater or potable water), nor polluted (sewage).
According to this definition, wastewater containing significant
food residues or high concentrations of toxic chemicals from
household cleaners, etc., may be considered "dark grey" or dirty
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