SEWAGE PURIFICATION PLANT Russian patent published in 1997 - IPC

FIELD: purification of effluents contaminated with anaerobic and erobic bacteria. SUBSTANCE: installed in radial settlers, each being made in the form of cylindrical-taper body 1 with horizontal overflow edge 2 and outflow passage 3 are side extending pipe 6 for aeration of effluents with the help of low-pressure blower 13. Located opposite to side extension pipes is immobilization head-piece 8, and tapered part of bodies incorporate intake units 4 connected with sludge pump 14. Located concentrically to overflow edge 2 at its internal side is toroidal bubbler 10 with vertical holes 11. Performed in surface layer of setter is treating of effluents by aerobic bacteria located on flexible threads of immobilization head-piece 8, and effluents of bottom layer are treated by active anaerobic silt. Effluents are also filtered through air streams discharged from vertical holes 11 of bubbler 10 and simultaneously they are saturated with air oxygen prior to their discharge to fish- farming water basin. EFFECT: high efficiency. 4 dwg