The global demand for purified water is growing rapidly with no signs of abatement. From increasingly demanding industrial requirements to a burgeoning requirement for improved drinking water quality, there are very few water uses anymore that can accommodate the available water supplies without some form of treatment.
Graywater can be defined as untreated domestic wastewater which has not come into contact with toilet or direct food waste. Typically, it is water coming from bathtubs, showers, sinks, laundry activities and similar water consuming systems. Not included are water discharges from toilets, kitchen sinks, disposers, dishwashers or laundry water from soiled diapers. These discharges are usually designated “blackwater”, primarily because of the potential presence of pathogenic microorganisms.