DOI 10.35776/MNP.2020.03.06
UDC 628.358

Strelkov A. K., Egorova Yu. A., Stepanov S. V., Levin D. I., Doubman I. S., Nikolaev Aleksei

Project for the reconstruction of the tertiary treatment plant
at the wastewater treatment facilities of the city of Samara

Summary

Design solutions implemented by «Samarskie Kommunal’nye Sistemy» LLC on the reconstruction of the tertiary treatment plant of the Samara wastewater treatment facilities were considered and analyzed. The project provides for the chemical removal of phosphorus in addition to biological dephosphotation and filtration of effluents after biological treatment. The chemical phosphorus removal unit has been constructed as a building with a packaged plant inside for the preparation and dosing of aluminum sulfate solution; this layout provides for reducing the heating and ventilation costs of the chemical treatment facilities. The chemical agent is added at twelve points in the sludge mixture flow at the outlet of each aeration tank. The calculated concentration of phosphorus as phosphate in the effluent is 0.2 mg/l; the annual consumption of marketable coagulant is 1545 tons; the purchase unit cost is 0.15 rubles/m³. Tertiary treatment by filtration has been ensured by the reconstruction of eight circular settling tanks with a diameter of 54 m into settler-filters with floating media. Herewith, no construction of new buildings and utilities is required. The calculated concentration of suspended solids in the effluent is 4 mg/l, BOD_full – 3 mg l. The specific energy consumption for the operation of filters with floating media is
0.57 Wh/m³, the cost of electricity – 0.0022 rubles/m³.

Key words

wastewater , sewerage treatment facilities , aftertreatment , chemical phosphorus removal , filter with floating media

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REFERENCES

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