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UDC 628.356.001.57

Meshengisser Yu. M., Shchetinin A. I., Esin M. A., Regotun A. A.

The experience of retechnologizing the existing wastewater biological treatment facilities

Summary

Retechnologization is an efficient advanced method of upgrading wastewater treatment facilities that has been successfully used by Ecopolymer Group for 10 years. Upon the completion of retechnologization of a number of wastewater treatment facilities with nutrient removal good quality of effluent at minimum construction works was achieved. The most perspective technology of removing nutrients from wastewater is multistage nitri-denitrification with the use of А/О- and А²/О-process flow schemes. Any type of aeration tank: two-, three- and four line facilities, complete-mix activated sludge systems, plug flow systems can be subject to retechnologization. Specific reconstruction design is determined with the help of mathematic modeling. Retechnologization of the wastewater treatment facilities has been carried out in more than twenty water and wastewater companies (Vodokanals).

Key words

biological treatment , removal of nitrogen and phosphorus , aeration tank , retechnologization

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