Water and water purification technologies

Scientific and technical news

USE OF DIFFERENT KIND BIOCIDES IN WATERTREATMENT

M. Sus, T. Mitchenko

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

e-mail: msus87@gmail.com

An overview and classification of up-to-date biocidal reagents for different purpose water disinfection are given. The action spectrum, mode of action, features, advantages and disadvantages of each of biocide are considered. The list of most known manufacturers and suppliers of biocides for water treatment is presented.

Key words: biocides, oxidizing, non-oxidizing, mode of action, microorganisms.

, , , ,
17.02.2012 at 1:37 pm

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.

, , , ,
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.

, , , , ,
17.02.2012 at 1:32 pm

CLEARING OF SMALL-SCALE TURBID COLOURED WATERS ON THE CONTACT AND BIOCLARIFYING FILTERS

V. Orlov, A. Orlova , H. Turovska

National university of water industry and nature management, Rivne, Ukraine

e-mail: Orlov_Valeriy@list.ru

Theoretical substantiation and the results of studies on lightening and discoloration of natural small-scale turbid and non-ferrous water on the contact bioclarifying filters.

Key words: contact filtering, coagulation, biological treatment, bioabsorber, carriers of biocenosis.

, , , ,
17.02.2012 at 1:14 pm

PARAMETERS AND INDICATORS OF A CONDITION OF WATER SUPPLY, QUALITY OF DRINKING WATER AND HEALTH OF THE POPULATION

S. Kapranov

Alchevsk Municipal Sanitary and Epidemiological Department, Alchevsk, Ukraine

e-mail: kapranova-volkova@rambler.ru

The development of the unified parameters and indicators of a condition of water supply, quality of drinking water and health of the population for their subsequent introduction at various levels in Ukraine is executed. The specified parameters and indicators are necessary for realization everywhere with use of uniform criteria state social-hygienic of monitoring (SGM) on section “Drinking water and health of the population” with the subsequent preparation and introduction of a complex of measures on improvement of quality of water used by the man, and condition of health of the population of Ukraine.

Keywords: unified parameters and indicators, water supply, quality of potable water.

, ,
17.02.2012 at 1:11 pm

MODELING OF PROCESS OF MAGNETIC PURIFICATION OF LIQUID ENVIRONMENTS FROM FERROMAGNETIC IMPURITIES IN THE CASE OF VARIABLE VELOCITY

A. Bomba1, V. Garashchenko2, А. Safonyk2, O. Garashchenko2

1 – Rivne State Humanitarian University, Rivne, Ukraine

e-mail: abomba@ukr.net

2 – National University of Water Management and Nature Resources Use, Rivne, Ukraine

e-mail: vigarashchenko@yandex.ru, safonik@ukr.net

 

The mathematical model of process of the magnetic besieging of admixtures in a porous filtering nozzle which takes into account reverse influence of characteristics of process (concentrations of sediment) on the parameters of environment at the terms of variable entrance velocity was offered. The algorithm of decision of the proper nonlinear perturbative problem of type “convection-mass-transfer” was built. On this basis was conducted a computer experiment, the results of which, in particular, confirm the known fact, that the productivity of work of filter substantially depends on velocity of filtration. Within the framework of this model is foreseen an automated control of process of the besieging of admixtures in the magnetized filtering nozzle depending on a basic data of water environment and velocity of filtration.

Key words: filtration, magnetic filter, magnetic purification, model of the magnetic besieging, asymptotic upshots, nonlinear tasks, reverse influence.

, , , , , ,
17.02.2012 at 11:52 am

ADSORPTION PROPERTIES OF NANOSTRUCTURED ALUMINUM OXIDE OBTAINED BY PHYSICAL VAPOR DEPOSITION

L. Krushinska1, Y. Stelmax1, I. Andrusishina2, I. Golub2, V. Gorchev3

1- E.O. Paton Electric Welding Institute of NAS of Ukraine, Kyiv, Ukraine

2 – Institute of Occupational Health of AMS of Ukraine, Kyiv, Ukraine

3 – Palladin Institute of Biochemistry of NAS of Ukraine, Kyiv, Ukraine

e-mail: krushinskaya@paton-icebt.kiev.ua, irina_andrei@voliacable.com

Sorption properties of nanostructured powders of aluminum oxide, obtained by EB PVD at condensation temperatures 100-650° С, with respect to positively charged metal ions and negatively charged ions of non-metals with different ionic and atomic radius were studied.

A comparative study of the adsorption capacity of nanostructured aluminum oxide, depending on the structural characteristics of the obtained materials revealed that it adsorbs predominantly positively charged metal ions. It appears that high sorption capacity of the nano-alumina takes place with ion or atom radiuses increased. However, the adsorption of anions does not depend on the structure of aluminum oxide.

It is revealed that nanostructured alumina can adsorb and retain on its surface metal and nonmetal ions, which makes it a promising material for water purification.

Key words: nanostructured powders of aluminum oxide, adsorption, АЕS-IСP analysis, рН, radius of atoms and ions of metals and nonmetals.

, , , ,
17.02.2012 at 11:47 am

METHOD OF CALCULATION OF SELF-CLEANING HYDRODYNAMIC FILTER OF TYPE “CYLINDER IN A CYLINDER”

V. Cheban

Donbass State Technical University, Alchevsk, Ukraine

e-mail: edvik2010@yandex.ua

The method of calculation of self-cleaning hydrodynamic filter of type «cylinder in a cylinder» which is based on long-term experience of designing of the working in domestic and foreign industry of hydrodynamic filter of liquids from firm pollution in a stream is presented.

Key words: hydrodynamic filter, «cylinder in a cylinder», process  water, firm pollution.

, , ,
13.09.2011 at 3:10 pm

MAGNETICALLY-FILTRATION PROPERTIES OF COMPOSITION GRANULAR NOZZLES OF MAGNETIC FILTERS

V. Garashchenko1, I. Astrelin2, O. Garashchenko1

1 – National University of Water Management and Nature Resources Use, Rivne, Ukraine

e-mail: vigarashchenko@yandex.ru

2 – National Technical University of Ukraine ”Kyiv Polytechnic Institute”

e-mail: i.m.astrelin@xtf.kpi.ua

Magnetically-filtration properties of composition granular nozzles of magnetic filters were investigated. It was shown that the size of middle induction in the volume of nozzle depends on correlation of the masses of granules of ferromagnetic and ferrimagnetic. The size of remaining magnetizing of composition nozzle in 2-3 times is less from the known ball-shaped nozzle. The influence of tensity of the external magnetic field on the size of coefficient of besieging was shown.

Key words: ferromagnetic nozzle, magnetic besieging, filtration.

, ,
13.09.2011 at 3:07 pm

RADIOACTIVE POLLUTION OF THE GROUNDWATER IN ZHITOMIR REGION

I. Zakharkevich1, A. Zapolskyi2

1 – National University of Life and Environment Sciences of Ukraine, Kiev, Ukraine

2 – National University of Food Technologies, Kiev, Ukraine

e-mail: innashum27@gmail.com

Radioactive contamination takes a special place in general pollution of environment. Large territory of Ukraine was polluted with radioactive contaminants after terrible accident on Chernobyl NPP. In this article the results of research of groundwater radiation in Zhitomir region are given. In addition, problems related to this contamination are noted.

Keywords: Chernobyl catastrophe, radioactive contamination, groundwater.

, ,
13.09.2011 at 3:03 pm

« Older Posts