METHOD FOR TREATMENT OF HOUSEHOLD SEWAGE WATER AND PLANT FOR ITS EMBODIMENT Russian patent published in 1998 - IPC

FIELD: treatment of sewage waters close in composition to household ones; may be used in individual systems of treatment of sewage waters of ships, separate buildings and structures. SUBSTANCE: method includes electrical oxidation and electrical coagulation of sewage waters carried out in two stages with intermediate separation of suspended matter, ozonization in body of filter of second stage, containing sorption material continuously regenerated in filter body with ozone. In addition, applied to nonsoluble electrodes of electric coagulator is DC with voltage of 6-12 V. Vibrofilter is used for intermediate separation of suspended matter after primary electrical coagulation. Sorption medium is used in the form of macroporous activated carbon with d=2.8-5 mm. Coagulated particles formed after ozonization on grainy filter of the third stage are separated. Used ozone-air mixture is utilized for preliminary ozonization. The plant for embodiment of the method has reservoir-homogenizer, grate, pump, coagulator, filter with grainy media, ozonizer and unit for treatment of sediments, electrolyzer of the first stage with aluminum and graphite electrodes, virbofilter for primary separation of suspended matter, electric coagulator of the second stage with soluble anodes, filters of the first second, third and fourth stages, unit for treatment of sediments includes vibratory compactor, drum-type drier-crusher, electric heater and bin for unloading and packaging of sediments. Besides, filters of the first and fourth stages have grainy media, and filter of the second and third stages have media in the form of activated carbon. EFFECT: provision of reliability of treatment of sewage waters higher than that of prototype and reduced overall dimensions of plant. 14 cl, 1 dwg, 1 tbl