Influence on Environmental Safety of the Drinking Water of Nitrification in Water Reservoir Being a Source of Water Supply and Filter Filling Materials in Water Treatment Facilities

Abstract:

The nitrification process inside the water treatment facilities is an environmental threat because it might cause unacceptable concentrations of nitrites in drinking water. Special data processing has been carried out in the course of daily monitoring of concentration levels for ammonium, nitrogen, nitrites, and nitrates in the Siverskyi Donets river at the water intake site, and downstream, in the water mass having passed through the facilities of the water treatment complex "Donets". Based on the above studies, a positive correlation was revealed (with a correlation coefficient of 0.64-0.93) between the activity of nitrification processes in the natural reservoir and the activity of nitrification inside the water treatment facilities. The environmental outcomes of the nitrification processes inside the water treatment facilities might be dangerous. Experimental studies have proven that the zeolite backfill of the rapid filters installed at the water treatment complex is the most favorable medium for immobilization of the nitrifying bacteria in comparison with other backfills of silica sand or anthracite coal, therefore it is quite suitable for the development of nitrification process. The studies have shown that nitrites do not accumulate in water after water treatment procedures, therefore, the rate of phase I nitrification inside these facilities does not exceed the rate of the second phase. To clean the filtering backfill of these microorganisms, a conventional technological wash is fairly enough.

• Periodical: Materials Science Forum (Volume 1006)
• Pages: 187-193
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1006.187
• Online since: August 2020
• Authors: Valentyna Iurchenko, Mykyta Radionov, Oksana Melnikova*, Olexandr Rachkovskiy, Larysa Mykhailova
• Keywords: Drinking Water, Environmental Safety, Natural Water Reservoirs, Nitrification, Nitrites, Water Treatment, Zeolite

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