DUAL WASTEWATER TREATMENT PLANT THAT SEPARATES SOAPY WATER OR GREYWATER FROM BLACKWATER.

摘要

The invention relates to a dual wastewater treatment plant which separates soapy water from blackwater and is intended to clarify and disinfect water that has already been used in housing estates in order to recycle same in houses, thereby saving up to 55% of the drinking water required in homes. The invention comprises the separation at the point of origin of soapy water, originating from sprinklers and the washing of clothes, from blackwater, originating from toilets (WC), bathroom sinks, kitchens and the washing of floors in homes. The soapy water is conveyed to a plant in which it is subjected to the following steps: stabilisation of the pH thereof; oxidisation; decantation; addition of polymers; anthracite and silica sand filtration; disinfection with ozone, sodium hypochlorite and ultraviolet light; and softening. Said water is subsequently returned to homes to be used in toilets and to wash clothes. The blackwater is conveyed to a plant in which it is subjected to the following steps: screening, sieving, digestion in an anaerobic and aerobic biological reactor, dynamic and static decantation, silica sand filtration, and disinfection with sodium hypochlorite and ultraviolet light. Said water is subsequently returned to houses to be used to water gardens, wash cars and wash floors, as well as for use in fountains. The excess blackwater recovered can be used to water communal gardens.