This paper considers with the issues of extracting polycyclic hydrocarbons from wastewaters by using physicochemical technology, including the use of flotation, settling, filtration, adsorption, ozonation. The usage of this technology could significantly reduce the concentration of such hazardous substances as benzopyrene in the treated wastewaters. Under certain regimes of wastewaters treatment using physicochemical technology, the concentration of benzopyrene does not exceed the standard values. The prospects for the usage of bio-flotation harvesters for the treatment of wastewaters, which contains complex organic substances are indicated.