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Complex "Dikanivka" & "Bezludivka" wastewater treatment plant (WWTP, Kharkiv) is one of the biggest in Ukraine. Mixture of industrial and domestic wastewater is treated on the station. Great volume of sewage sludge has been produced and accumulated for forty years of the plant operation, Environment of the region has been affected rather seriously in result of out-of-date sludge dewatering system exploitation and heaps of dewatered sludge on the territory of the plant Environment stabilization in the area of sludge treatment is an urgent problem of the region, Phytoremediation as a promising natural technology for the purpose is discussed in the article. Sewage sludge is rich in organic matter and nutrient elements (nitrogen and phosphates) therefore it could be applied for soil fertilization. On the other hand, due to high heavy metals (Cd, Ni, Cu, Cr) concentration in sludge, contamination with enteric parasites, pH less than 5,5 there is restriction for sludge application in agricultural production, Willow (Salix spp,) is discussed as a plant for phytoremediation of the territory and for substratum properties melioration because of its availability to accumulate heavy metals, regulate concentration of nutrients, high biomass production and high environmental tolerance. Experiment in situ has to be carried for the plant-remediater selection and for investigation of sludge agricultural properties dynamic.

Sewage sludge treatment for fertilizer production using biotechnologies: perspectives for the Bezludivka wastewater treatment plant, Kharkiv