METHOD FOR PRECIPITATION OF PHOSPHORUS FROM WASTE WATER Russian patent published in 2013 - IPC C02F9/04 C02F1/52 C02F103/20 

FIELD: chemistry.

SUBSTANCE: invention can be used in small-size continuous purification plants for precipitating phosphorus from waste water, particularly household waste water. An apparatus, which is connected to the small-size purification plant, has a pumping tank (1), a discharge pump (2) for draining the pumping tank, a chemical reservoir (6) and a dosing pump (5) for the chemical coagulant which is meant for feeding the chemical coagulant from the chemical reservoir (6) into the waste water discharged from the pumping tank (1), wherein separation of the formed residue of chemical substance from water released from said purification plant takes place in the settling reservoir (12) of the small-size purification plant. The apparatus can entirely be placed inside the settling reservoir (12) of the small-size purification plant. The dosing pump (5) is configured to pump the chemical coagulant into a stream generated by the discharge pump (2) during the entire or almost entire operating cycle of the discharge pump (2).

EFFECT: invention provides complete mixing of treated water and reactant, increases the efficiency of precipitating phosphorus and enables to control the amount of chemical coagulant depending on fluctuations of the flow of waste water for efficient and simple precipitation of phosphorus.

11 cl, 1 dwg