Water and water purification technologies

Scientific and technical news

MAIN POSSIBILITIES OF IMPROVEMENT OF HUMIC SUBSTANCES REMOVAL BY ULTRAFILTRATION

Т. Mitchenko, О. Svietlieisha

National Technical University of Ukraine “KPI”, Kiev, Ukraine

e – mail: aves_@rambler.ru

Ultrafiltration becomes more popular in drinking and wastewater treatment today. It used individually or as a pretreatment for reverse osmosis. Practical experience has shown a high efficiency of suspended particles and microbial contamination removal with ultrafiltration method, in contrast to the removal of organic substances that is usually below the stated. It is an essential problem for water treatment of rivers of Dnieper basin. Their main characteristic and problem as well is high content of humic substances (HS) (5-16 mgO2/l). Water with high level of HS is unfit for using in manufacturing processes and for drinking purposes without any treatment. It has shown that membrane surface modification and combination of physical-chemical methods with ultrafiltration can increase the efficacy of HS removal and reduce their negative impact on the membrane surface.

Keywords: coagulation, oxidation, ultrafiltration, humic compounds, modification of membrane surface.

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17.02.2012 at 1:35 pm

THE COMBINED METHODS OF PURIFICATION AND WATER DISINFECTING. THE MESSAGE THE FOURTH: THE COMBINED APPLICATION OF CHLORINE DIOXIDE AND CHLORINE

N. Petrenko,  A. Mokienko

State Enterprise “Ukrainian Research Institute for Medicine of Transport” of Ukrainian  Ministry of Public Health, Odessa, Ukraine

e-mail: natand@normaplus.com

The data of the literature and results of own researches on the combined application of chlorine dioxide and chlorine at purification and disinfecting of drinking water are presented. The optimality of the following technological scheme  is proved: oxidation of river water by chlorine dioxide, coagulation,  filtration, disinfecting by chlorine.

Keywords: water, oxidation, disinfecting, chlorine dioxide, chlorine, combination.

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17.02.2012 at 1:32 pm

PECULIARITIES OF PHYSICAL AND CHEMICAL TRANSFORMATIONS OF IRON IN UNDERGROUND WATERS

T. E. Mitchenko, E. O. Orestov, Z. V. Maletskyi

National technical university of Ukraine “KPI”, Kyiv, Ukraine

e-mail: e.orestov@gmail.com

The article presents an overview of physical and chemical transformations of various forms of iron which are typical for groundwater. As factors that influence the form and contents of iron, the presence of oxidants, pH, redox potential, ionic composition of water and the presence of organic compounds ( mainly humic substances) are considered.

Keywords:  iron, oxidation, pH, redox potential, humic substances.

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21.08.2011 at 7:20 pm