METHOD OF PURIFYING HOUSEHOLD AND INDUSTRIAL SEWAGE WATER Russian patent published in 2015 - IPC C02F9/14 C02F9/02 C02F3/30 C02F1/32 B01D36/00 

FIELD: chemistry.

SUBSTANCE: invention relates to purification of household and industrial sewage water. The method of sewage water purification includes balancing a water flow and biological purification with active sludge. Initial sewage water is supplied through a self-cleaning filter device for straining, and mechanically purified sewage water is discharged into a balance tank and supplied into a tank of biological purification. Separation of purified water and active sludge is carried out by means of submergible membrane cassettes with membrane modules. Separation of permeate is realised by the action of a weak vacuum. Permeate is supplied into a pure water tank and further by a gravity flow to an installation of ultraviolet disinfection. Disinfected water is discharged into a water body. Continuous aeration of the membrane cassettes with membrane modules is realised by means of a group of membrane unit blast blowers. The membrane modules are periodically washed and alternated with relaxation modes. Also realised is the periodic prophylactic cleaning of the membrane cassettes and periodic restoring cleaning.

EFFECT: invention makes it possible to improve the quality of purified water discharges and provide the relaxation of applied devices.

2 dwg