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UDC 628.161:544.723

Gvozdev V. A., Portnova T. M., Iatsinevich N. V.

Regeneration of the sorption capacity of granulated activated carbon


The analysis of the Neva River water quality parameters shows the changes in the chemical, biological and physical composition of the water under the environmental impact. Microbial as well as organic chemical pollutants get into the water source. Among all the monitored drinking water quality indicators the customers recognize bad smell at once. Double-layer filter bed (sand and activated carbon) provides for the efficient removal of colloid compounds and finely dispersed particles with low hydraulic size. Herewith the granulated carbon layer traps various organic compounds and water soluble oil products. Owing to the process of chemical compound oxidation (destruction) by ozonation and subsequent treatment with sorbent the chemical substances that flavor water with taste and smell are removed; as well as the color and permanganate value are lowered. When using powdered activated carbon at the filtration facilities achieving the treatment efficiency and estimation of the costs are required because in case chlorine-containing chemical is added to the water immediately after activated carbon is introduced the consumption of disinfection chemicals significantly increases. Thus, it is very important to include a sorption unit with granulated activated carbon to improve the reliability of water treatment. The efficiency of water treatment with granulated activated carbon was tested in K-6 unit at the Southern Waterworks of Saint-Petersburg. The evaluation of the water quality parameters after carbon reactivation was made. Reactivation of Filtrasorb TL 830 activated carbon under the selected process conditions provides for the satisfactory regeneration of the material sorption capacity while preserving its mechanical properties.

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