METHOD OF THE SEWAGE BIOLOGICAL PURIFICATION Russian patent published in 2007 - IPC C02F3/02 C02F3/10 

FIELD: environmental protection; methods of the sewage biochemical purification.

SUBSTANCE: the invention is pertaining to the field the sewage biological purification by the methods of the biochemical oxidation of the organic substances in the aerotank-displacer. The method provides for after-oxidization of the organic substances in the three-stage bioreactor of the after-purification with the active sludge return from the first stage of the bioreactor of the after-purification into the head of the sewage disposal plants. The first stage of the bioreactor of the after-purification is the aerated stage with the intensity of aeration of no less than 3 m³/m²·h, and the fibrous carriers of the biomass in the cartridges are disposed in the staggered order. On the first stage of the bioreactor of after-purification use the fibrous carriers of the biomass with the percent share of the polyamide fibers with the diameter of more than 200 microns - 100 %, and on the second and third stages - the percent share of the polyamide fibers with the diameter of more than 200 microns do not exceed 80 %. The technical result of the invention is the increase of the oxidative power of the facilities of the biochemical purification without any increase of their volume, provision of the stable operation of the facilities at variations of the hydraulic loading and the sharp jumps of the concentrations of the toxic compounds at the inlet of the sewage purification plants.

EFFECT: the invention ensures the increased oxidization power of the the biochemical purification facilities without any increase of their volume, provision of the stable operation of the facilities at variations of the hydraulic loading and the sharp jumps of the concentrations of the toxic compounds at the inlet of the sewage purification plants.

3 cl, 1 dwg