During the experimental investigations the influence of different silicon deaerators, which are added into the pulp to prevent the foam formation, on oxygen saturation of waste waters formed during the paper goods production from wastepaper was estimated. It was shown that deaerators significantly reduce oxygen concentration in waste waters and, consequently, increase its danger for natural water basins. The indicators of performance of the flotation in removing deaerators from waste water were reviewed.
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.
За результатами обробки багаторічних даних про вміст неорганічних сполук азоту в воді р. Сіверський Донець на ділянці водозабору, експериментальних хімічних і біохімічних досліджень води і донних відкладень на цій ділянці встановлено показники процесу нітрифікації та рівня її загроз екологічній безпеці водойми й питного водопостачання м. Харкова. Ключові слова: нітрифікація, вміст нітритів, константи швидкості, біокінетичні константи, концентрація нітрифікуючих бактерій. Кинетические характеристики нитрификации в водоеме-источнике питьевого водоснабжения. Юрченко В.А., Радионов Н.П., Мельникова О.Г. По результатам обработки многолетних данных содержания неорганических соединений азота в воде р. Сиверский Донец на участке водозабора, экспериментальных химических и биохимических исследований воды и донных отложений на этом участке установлены показатели процесса нитрификации и уровня ее угрозы экологической безопасности водоема и питьевого водоснабжения г. Харькова. Ключевые слова: нитрификация, содержание нитритов, константы скорости, биокинетические константы, концентрация нитрифицирующих бактерий. Kinetic parameters of nitrification in water basin which is a potable water source. Yurchenko V., Radionov M., Melnikova O. As a result of longitudinal data processing of inorganic nitrogen compounds contents in the riv. Siv. Donets water, in the area of water intake, experimental chemical and biochemical investigations of water and bottom sediments were established indicators of nitrification and the rate of its threat to ecologic safety of the water basin and Kharkiv potable water supply.
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