Water and water purification technologies

Scientific and technical news

REMOVING OF SUBSTANCES THAT INFLUENCE THE HORMONAL SYSTEM OF LIVING ORGANISMS FROM THE WASTE WATERS USING TRADITIONAL WATER-TREATMENT METHODS

R. Mesarosh1, S. Barany1, 2

1 – University of Miskolc, Institute of Сhemistry, 3515 Miskolc-Egyetemváros, Hungary

2 – Ferenc Rákóczi II Transcarpathian Hungarian Institute,Beregovo,Ukraine

e-mail: sbarany@uni-miskolc.hu

The article obtains a broad literature review on issue of drinking and industrial waste waters treatment. Substances that strongly impact on the hormonal system of living organisms (Endocrine Disrupting Compounds or EDC-type substances) are mostly in a focus. Composition/structure of the most typical substances, affecting hormonal balance of man and their classification are given. The paths of getting the indicated matters into environment are described. The short analysis of difficulties of analytical determination of EDC-substances are given. The basic methods of this kind pollutants removing from different types of water are critically considered: coagulation, adsorption on activated carbon, oxidization, biological and membrane methods, ozone and chlorine. The article contains 25 references.

Keywords: substances, hormonal system, living organisms, composition and classification, sewages, treatment, coagulation, adsorption, activated carbon, destruction, ozone, chlorine, biological treatment, membrane methods. 

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19.07.2013 at 3:22 pm

DEACTIVATION OF BIOCIDES IN INDUSTRIAL WATER TREATMENT

Terry M. Williams, Heather R. McGinley, Paul L. Wood

Dow Microbial Control, The Dow Chemical Company

Industrial biocides are used for microbial control in a variety of industrial water systems including, cooling, paper, oilfield, and membrane applications. Biocide treatment programs are typically designed to provide optimal results based on environmental conditions, regulatory needs, efficacy, and cost. An important area of concern relating to biocide use is discharge of the treated effluent (ex., blowdown) into waste treatment systems or natural waters. Regulatory requirements also impact the amount of biocide that may be released. In many cases, the biocide must be effectively deactivated or neutralized prior to discharge of the effluent. This paper will provide a review of the specific methods for deactivating the various oxidizing and non-oxidizing biocides commonly used today. Examples of lab and field data will be presented.

Keywords: water treatment, biocide, disinfection, oxidizer, non-oxidizing product, isothiazolones, glutaraldehyde, dibromonitrilopropionamide, DBNPA, bronopol, Tetrakis(hydroxymethyl)phosphonium sulfate, THPS, chlorine, bromine.

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20.11.2012 at 1:34 pm

ANALYTICAL RESEARCHES OF CHLORINE USE AS WATER DISINFECTANT (HYGIENIC, MEDICAL, AND ECOLOGICAL ASPECTS)

A. V. Mokienko, N. F. Petrenko,  A. I. Gozhenko

State Enterprise “Ukrainian Research Institute for Medicine of Transport”

of Ukrainian  Ministry of Health Care, Odessa, Ukraine

e-mail: natand@breezein.net

The analysis of hygienic, medical and ecological aspects of chlorine used as water disinfectant is given in the work presented. A comparative estimation of risks at the use of contaminated by pathogenic microorganisms water and the same water containing chlorination by-products  proves that epidemic safety should predominate at disinfection.

Key words: chlorine, disinfection, chlorine – resistance, chlorination by-products.

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19.11.2012 at 4:11 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

COMBINED METHODS FOR WATER PURIFICATION AND DISINFECTION. THE THIRD MESSAGE: COMBINED APPLICATION OF CHLORINE WITH UVI OR OZONE

N. Petrenko, A. Mokienko

Ukrainian Research Institute of Transport Medicine, Health Ministry of Ukraine, Odessa, Ukraine

e-mail: natand@normaplus.com

The review of data of the literature concerning the combined application of chlorine with ultraviolet irradiation (UVI) or ozone is presented. The analysis has shown, that efficiency of such combination in essential degree depends on a number of conditions which can be divided on two groups: the first – an optimality combination of certain doses for UVI and chlorine; the second – difference of influence of рН and temperatures for ozone and chlorine on efficiency of their combination with UVI.

Key words: water, purification, disinfection, chlorine, UVI, ozone, combination.

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21.08.2011 at 7:25 pm