FIELD: sewage treatment. SUBSTANCE: sewage flows by gravity into a settling average then is subjected to coarse treatment in a system of successive flotation machines including impeller ones additionally provided with a dialysis cassette and/or a filled short-circuit galvanic pair with pH of medium varying from 4 to 4.5. Fine treatment is carried out in a two-section sorption column and/or closed-circuit ozonizing device with reagents transferred by pumps. Contents of suspended matter, fats and proteins, within permissible concentrations. EFFECT: higher efficiency. 7 cl, 1 dwg, 2 tbl
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