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UDC 628.16.066.1

Balaev I. S., Kuchma G. G., Mel'nikov I. A., Repkin M. V., Khanlarov G. V.

The experience of introducing dynamic clarifiers in natural and wastewater treatment

Summary

The experience of introducing the technology of purifying natural and wastewater to the regulated quality parameters in dynamic clarifiers and dual-media mechanical filters is presented. The technology and related equipment have been developed by the experts of CJSC NPE «United Water Technologies» (Moscow). Dynamic clarifier is the result of upgrading
traditional filters with floating filter media and contact clarifiers. Upgrading included improving upper and bottom drai­nage distribution devices, and using granulated floating inert filter media (3–5 mm grain size, density 0.8–0.9 g/cm3) based on polymer materials (polyethylene, polypropylene etc) which was characterized by high mechanical strength and, respectively, by long lifetime. The process flow scheme of the Novokuznetsk aluminium smelter (RUSAL Company) wastewater treatment is considered. Industrial effluent of the plant is recycling and used in cooling the basic process equipment as well in manufacturing products and chemicals. In order to further promote the technology of dynamic clarification the dynamic clarification filter was patented. It is a dual-chamber apparatus consisting of an upper primary treatment chamber and a bottom fine treatment chamber. The principle of operation is in preliminary dosing coagulant and flocculant into incoming water and upward water flow filtering through the primary treatment chamber with INERT® floating inter filter media (3–5 mm grain size), and further filtering through the fine treatment chamber with coarse-grained hydro-anthracite (1.2–2.5 mm grain size) (upper layer) and fine grained (0.6–1.2 mm) quartz sand (bottom layer). The first results of introducing dynamic water clarification prove that it is more efficient and cost-effective compared to the traditional technologies of natural and wastewater treatment.

Key words

dynamic clarifier , dynamic clarification filter , inert filter media , mechanical filter , pressure contact tank , surface water , wastewater

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REFERENCES

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