METHOD OF DEEP PURIFICATION OF SEWAGE WATERS Russian patent published in 2008 - IPC C02F9/14 C02F3/02 C02F1/24 C02F103/04 

FIELD: chemistry, technological processes.

SUBSTANCE: method of deep purification of sewage waters includes collation of sewage in filtering self-purifying devices, averaging of expenditure, reagent coagulation and flocculation of sewage water admixtures. After separation of main mass of sewage water admixtures by means of clarifier, afterpurification of sewage waters is carried out in bioreactor by means of microorganisms fixed on bristle brush attachment. Also performed are: recirculation of purified sewage, disinfection of purified water, recycling, neutralisation and condensing of sewage water sediments, aerobic biological purification of sewage waters and processing of sediments. For separation of main mass of sewage water admixtures during clarification denitrification floatation is used. Biological processing and neutralisation of float-foam is carried out by means of aerobic mineralisation together with regeneration silt water of bioreactor of sewage water afterpurification. Afterpurification of sewage waters from phosphorus is carried out by means of water filtration through bristle brush attachment, located in upper part and purolite in lower part of bioreactor. Disinfection of purified water is carried out by exposure to ultraviolet rays.

EFFECT: reduction of purification plant cost; simplification of its use and reduction of maintenance costs.

2 cl, 1 dwg