MULTISTAGE GRAY WASTEWATER TREATMENT DEVICE Russian patent published in 2021 - IPC C02F1/28 C02F9/12 C02F1/32 B01J20/02 

FIELD: chemical industry.

SUBSTANCE: invention relates to stations that include a combination of chemical and physical and chemical treatment of household wastewater from washbasins, bathtubs and washing machines containing surfactants and a small amount of BOD, and can be used in the communal services of cottage and shift camps and apartment buildings for partial re-use (recycling). The gray wastewater treatment device includes a mud filter for coarse mechanical cleaning of gray wastewater, a fine mesh filter, a storage tank with a submersible mixer for accumulation and homogenization, a clarification filter with an anthracite load, a sorption filter with an activated carbon load to remove residual organic substances, a contact tank for the destruction of hard-to-oxidize contaminants with a strong oxidant prepared and dosed from an oxidizer preparation unit, an ultraviolet disinfection unit, a hydraulic tank for disinfected and treated wastewater, and part of the treated water from the contact tank is used to wash the mud filter and mesh filter.

EFFECT: invention makes it possible to reduce the consumption of drinking water due to the rational use of treated waste water for the technological needs of a residential building.

3 cl, 1 dwg