scholarly journals Evaluation of barrier functions of traditional water supply facilities in relation to toxic trihalomethanes

2018 ◽  
Vol 251 ◽  
pp. 03032 ◽  
Author(s):  
Zhanna Govorova ◽  
Galina Gorenko ◽  
Uliana Rudich ◽  
Vadim Govorov
Keyword(s):  
Water Treatment ◽  
Water Supply ◽  
Natural Waters ◽  
Organic Pollution ◽  
Human Organism ◽  
Technological Parameters ◽  
Negative Effects ◽  
Foreign Countries ◽  
Reagent Treatment ◽  
Carcinogenic Substances

The problem of formation of the toxic carcinogenic substances in the process of the water treatment during disinfection of natural waters containing organic pollution is actual both in Russia and in foreign countries. There is an information about the negative effects of trihalomethanes (THM) on the human organism. The examples shows that, the concentration of trihalomethanes in the drinking water exceeds the standards several times in water treatment according to the traditional technology with the use of chlorine. The aim of the work was to study the dynamics of THM changes in the stages of purification in the comparison with the water quality, the reagent treatment modes and technological parameters to assess the barrier role of existing water supply stations. It was found that the standard degree of the purification achieves with chromaticity, turbidity, permanganate oxidation, bacteriological parameters. At the same time, the prechlorination of water with a temperature of 1 ° C and a chromaticity of 67-71 °C leads to the formation of chloroform in the amount of 40-61 µg/l, and postchlorination at the final stage of the full cycle contributes to an increase in the concentration to 192-215 µg/l. The new data were the basis for the development of the improved water purification technology and measures for the modernization of the water supply stations.

scholarly journals ANALYSIS OF TECHNOLOGICAL SOLUTIONS OF WATER SUPPLY SYSTEMS OF SINGLE-INDUSTRY TOWNS OF THE REPUBLIC OF KARELIA

2018 ◽  
Vol 8 (4) ◽  
pp. 29-36
Author(s):  
Arkady N. KIM ◽  
Elena O. GRAFOVA ◽  
Yury P. EFTIFEEV
Keyword(s):  
Water Treatment ◽  
Water Supply ◽  
Water Consumption ◽  
Wash Water ◽  
Water Supply Systems ◽  
Water Treatment Plants ◽  
Single Industry ◽  
Reagent Treatment ◽  
The Republic ◽  
Supply Systems

On the example of single-industry towns of the Republic of Karelia the article shows the possibility of restoring the activities of enterprises depending on the state of engineering support of water supply systems. There was a decrease in water consumption, high wear of water treatment plants, the lack of reagent treatment of colored water and, as a result, ineffi cient operation of facilities. It is shown that the reconstruction is possible with the application of the investment program. Projects have been developed for the reconstruction of the technological scheme for purifying low-turbid, high-color water and creating a circulating system for cleaning the wash water of contact illuminators.

scholarly journals Natural water treatment system: the potential of applying artificial floating island technology in lakes, ponds and dam lakes in Turkey

2021 ◽  
Vol 4 (4) ◽  
pp. 376-394
Author(s):  
Mert Minaz ◽  
Ayşegül Kubilay
Keyword(s):  
Natural Waters ◽  
Organic Pollution ◽  
Pilot Scale ◽  
Treatment System ◽  
Added Value ◽  
Pollution Load ◽  
Negative Effects ◽  
Floating Island ◽  
Scale Establishment ◽  
Economical Alternative

In this study, the implementation potential of artificial floating island (AFI) technology, which is a phytoremediation strategy, was investigated in Turkish lakes, ponds and reservoirs. The pressure on water resources is increasing ever with the global warming as well as the effect of climate change. In addition, increasing environmental pollution directly and/or indirectly harms the organisms thus has negative effects on their lives. In this context, the importance of lakes, ponds and dam lakes in Turkey against adverse global and environmental conditions has increased in recent years. Innovative, sustainable and economical solutions are required for the improvement of lakes, ponds and dam lakes, considering that these are main resources of drinking water, irrigation of agricultural lands, and recreational activities. Considering the current trophic state of natural waters in our country, many lakes, ponds or dam lakes have been identified with eutrophication potential. AFI technology, which is widely established globally to remediate such organic pollution load, is a highly economical alternative treatment system. Previous studies have generally focused on the laboratory and pilot scale implementation of AFI technology. In the future, full-scale establishment of AFI technology will provide significant added value for both the scientific and the national economy.

APPLICATION OF SODA IN STABILIZATION WATER TREATMENT IN REVERSE CYCLES OF WATER SUPPLY OF GAS-CLEANED UNITS OF BOFS

2019 ◽  
pp. 51-60
Author(s):  
S.I. Epshtein ◽  
◽  
S.E. Nikulin ◽  
Yu.A. Shliakhova ◽  
A.I. Kondratenko ◽  
...  
Keyword(s):  
Water Treatment ◽  
Water Supply

An instrument for the measurement of colour and turbidity in natural waters

1998 ◽  
Vol 37 (12) ◽  
pp. 263-267 ◽  
Author(s):  
Henry O. Edwards
Keyword(s):  
Water Treatment ◽  
Natural Waters ◽  
Beam Intensity ◽  
Compensation Technique

The development of a sensor to measure colour and turbidity of natural waters is described. Filtration of the water is not required, so maintenance intervals and costs will be reduced. A four-beam intensity compensation technique is used for robust measurement and resistance to fouling. Results of the operation of a prototype at a water treatment works are presented.

Enhanced rapid gravity filtration and dissolved air flotation for pre-treatment of river thames reservoir water

1998 ◽  
Vol 37 (2) ◽  
pp. 35-42 ◽  
Author(s):  
M. J. Bauer ◽  
R. Bayley ◽  
M. J. Chipps ◽  
A. Eades ◽  
R. J. Scriven ◽  
...  
Keyword(s):  
Water Treatment ◽  
Water Supply ◽  
21St Century ◽  
Reservoir Water ◽  
Dissolved Air Flotation ◽  
Lowland Rivers ◽  
Air Flotation ◽  
Pre Treatment ◽  
Counter Current ◽  
Dissolved Air

Thames Water treats approximately 2800Ml/d of water originating mainly from the lowland rivers Thames and Lee for supply to over 7.3million customers, principally in the cities of London and Oxford. This paper reviews aspects of Thames Water's research, design and operating experiences of treating algal rich reservoir stored lowland water. Areas covered include experiences of optimising reservoir management, uprating and upgrading of rapid gravity filtration (RGF), standard co-current dissolved air flotation (DAF) and counter-current dissolved air flotation/filtration (COCO-DAFF®) to counter operational problems caused by seasonal blooms of filter blocking algae such as Melosira spp., Aphanizomenon spp. and Anabaena spp. A major programme of uprating and modernisation (inclusion of Advanced Water Treatment: GAC and ozone) of the major works is in progress which, together with the Thames Tunnel Ring Main, will meet London's water supply needs into the 21st Century.

scholarly journals Addressing the challenges in projects of water treatment plants and storage of potable water: a case studies of the water supply system in the state of Goiás, Brazil

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Anne Louise de Melo Dores ◽  
Felipe Corrêa Veloso dos Santos
Keyword(s):  
Water Treatment ◽  
Water Supply ◽  
Treatment Plant ◽  
Water System ◽  
Treatment Phase ◽  
Water Treatment Plant ◽  
Operating Efficiency ◽  
Water Supply Systems ◽  
Storage Tanks ◽  
Variation Curve

AbstractTo elaborate efficient and economical water supply systems is one of the main objectives in the sanitation companies water system projects. In order to address the challenges faced in reaching this objective, this study aims to identify, first, the relation between the percentage of non-conformed samples in treated water and the inefficiency of the filtering units installed in the water treatment plant, and second, if, by drawing the consumption variation curve it is the most efficient way to predict the storage tanks volume—comparing necessary capacity, determined by the consumption curve, and installed capacity, predict by the outdated Brazilian normative. In order to reach answers for these two questions, this study measured the operating efficiency of the treatment plant as well as have set a quantitative comparison between the two dimensioning criteria for storage tanks volume present in the literature. As a result, the analysis provided the authors to detect a focus of contamination in the single-layered filtering units, limited by the filtering capacity of 2–6 m3/(m2 day), whilst operating at 333.13 m3/(m2 day). As well as to detect by the drawing of the consumption variation curve an oversize of 68% and 60% in the dimensioning of the studied storage tanks. With the results provided by this analysis approach, it was possible to efficiently detect and correct critical impairments in the treatment phase and to conclude that a long-term analysis should be drawn in order to affirm if the consumption variation curve is the best design methodology for the reservoirs.

Experiences with the practical implementation and operation of biological nitrification for a small-scale drinking water treatment plant

2016 ◽  
Vol 16 (4) ◽  
pp. 922-930 ◽  
Author(s):  
L. Richard ◽  
E. Mayr ◽  
M. Zunabovic ◽  
R. Allabashi ◽  
R. Perfler
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Supply ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Drinking Water Supply ◽  
Small Scale ◽  
Treatment Performance ◽  
Biological Nitrification

The implementation and evaluation of biological nitrification as a possible treatment option for the small-scale drinking water supply of a rural Upper Austrian community was investigated. The drinking water supply of this community (average system input volume: 20 m3/d) is based on the use of deep anaerobic groundwater with a high ammonium content of geogenic origin (up to 5 mg/l) which must be treated to prevent the formation of nitrites in the drinking water supply system. This paper describes the implementation and operation of biological nitrification despite several constraints including space availability, location and financial and manpower resources. A pilot drinking water treatment plant, including biological nitrification implemented in sand filters, was designed and constructed for a maximum treatment capacity of 1.2 m3/h. Online monitoring of selected physicochemical parameters has provided continuous treatment performance data. Treatment performance of the plant was evaluated under standard operation as well as in the case of selected malfunction events.

Removal of pesticides during the drinking water treatment process at Florence water supply, Italy

1999 ◽  
Vol 48 (5) ◽  
pp. 177-185 ◽  
Author(s):  
O. Griffini ◽  
M. L. Bao ◽  
D. Burrini ◽  
D. Santianni ◽  
C. Barbieri ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Supply ◽  
Treatment Process ◽  
Drinking Water Treatment ◽  
Water Treatment Process
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