FIELD: sewage water aftertreatment. SUBSTANCE: sewage water is filtered by passing through a mixed medium which is next washed and blast-cleaned. The medium is composed of fillers, a sorbent and microorganisms. For the filter selected is broken stone of 20-10 mm fraction and or the sorbent - absorbent carbon, their mass ratio ranging from 1.1 to 1.5. The aftertreatment extent is enlarged from 65-70 to 80% by chemical oxygen minimum. EFFECT: increased aftertreatment extent, removal of up to 80% petroleum products. 1 tbl
