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UDC 504.06

PANKOVA G. A., Rublevskaya O. N., Leonov L. V.

SUE «Vodokanal of St. Petersburg»’s activities in the field  of mitigating the negative environmental impact

Summary

The results of the SUE «Vodokanal of St. Petersburg»’s activities on eliminating raw sewage discharges into the city water bodies are presented. The use of advanced technologies that provided for reducing nutrients discharge with effluents of the wastewater treatment facilities is described, as well as the solution of the problem of wastewater sludge handling and utilization by introducing incineration technology that provided for abandoning sludge storing at special municipal landfills. The new and upcoming trends of the SUE «Vodokanal of St. Petersburg»’s activities on mitigating the negative environmental impact: storm water volume metering and treatment; snow utilization; tackling the problem of hazardous pollutants, micro plastics and pharmaceuticals in particular, are laid. With the purpose of further reduction of pollutant discharges into the receiving water bodies (with raw sewage) the developed «St. Petersburg water supply and wastewater disposal development Scheme till 2025 inclusive of the 2030 prospects» envisages complete elimination of raw combined and domestic wastewater discharges into receiving water bodies before 2022; elimination after 2030 of discharge of 50% of surface runoff without treatment into the separate municipal storm sewer (at present only 2% of surface runoff passes treatment). The Scheme includes a comprehensive information database on the water supply and wastewater disposal systems as well as the urban planning documents and schemes prepared for other directions of engineering and energy complex of St. Petersburg.

Key words

wastewater , hazardous substances , surface runoff , biogenic elements , sludge incineration , wastewater sludges

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REFERENCES

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