drinking water treatment Articles
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Evaluation of model parameters for simulating TiO2 coated UV reactors
A CFD-based model for simulating TiO2 coated photocatalytic reactors used in drinking water treatment applications was preliminarily evaluated. The model includes aspects of hydrodynamics, mass transfer, UV-radiation field, and surface chemical reactions. Appropriate models for each of the associated physicochemical phenomena were experimentally or analytically examined. Once defined and ...
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Research on raw water quality assessment oriented to drinking water treatment based on the SVM model
Raw water quality variation has a great effect on drinking water treatment. To improve the adaptivity of drinking water treatment and stabilize the quality of treated water, a raw water quality assessment method, which is based upon the support vector machine (SVM), is developed in this study. Compared to existing raw water quality assessment methods, the assessment method studied herein is ...
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Coping with poor water supplies: empirical evidence from Kathmandu, Nepal
The authors examined the demand for clean drinking water using treatment behaviors in Kathmandu, Nepal. Water supply is inadequate, unreliable and low quality. Households engage in several strategies to cope with the unreliable and poor quality of water supplies. Some of the major coping strategies are hauling, storing, and point-of-use treatment. Boiling, filtering, and use of Uro-guard are some ...
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Removal of NOM-constituents as characterized by LC-OCD and F-EEM during drinking water treatment
Natural organic matter (NOM) is of concern in drinking water because it causes adverse aesthetic qualities such as taste, odour, and colour; impedes the performance of treatment processes; and decreases the effectiveness of oxidants and disinfectants while contributing to undesirable disinfection by-products. The effective removal of NOM during drinking water treatment requires a good ...
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YANG PYUNG, Korea: Ecoskid–Elimination of turbidity and microbiological retention
The Yang Pyung drinking water treatment plant was equipped with a sand filter process up until 2005. To improve water quality, the city chose the Aquasource technology to modernize its plant. It is the first unit equipped by Aquasource in ...
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Drinking Water Treatment Process
Most drinking water comes from a surface water source, such as a lake or river, or a groundwater source, such as a well or spring. This water requires treatment before it can be safely consumed; the level to which the water is treated depends on the source of the water and also on federal regulations. In the United States, for example, the Safe Drinking Water Act was created by the Environmental ...
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Drinking water treatment - understanding the processes and meeting the challenges
On and follow Natural organic matter (NOM) derived from soil and vegetation in water catchments is the key factor influencing most, if not all water treatment processes. The structure of the NOM and its involvement in water treatment processes requires better understanding. It seems likely that a better understanding of NOM reactions could lead to far better predictive capacity for water ...
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Influence of density flow on treated water turbidity in a sedimentation basin with inclined plate settler
The removal efficiency of particulate matter from a sedimentation basin with an inclined plate settler in drinking water treatment facilities is sometimes reduced by density flow caused by temperature increases in the raw water. In this study, the structure of the density flow and its prevention are investigated by means of three-dimensional computational fluid dynamics (CFD). The results of ...
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Control-design methodology for drinking-water treatment processes
The performance of a drinking-water treatment plant is determined by the control of the plant. To design the appropriate control system, a control-design methodology of five design steps is proposed, which takes the treatment process characteristics into account. For each design step, the necessary actions are defined. Using the methodology for the pellet-softening treatment step, a new control ...
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Identification, assessment, and control of hazards in water supply: experiences from Water Safety Plan implementations in Germany
According to the recommendations of the World Health Organization (WHO) for Water Safety Plans (WSP), a Technical Risk Management was developed, which considers standard demands in drinking water treatment in Germany. It was already implemented at several drinking water treatment plants of different size and treatment processes in Germany. Hazards affecting water quality, continuity, and the ...
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Instrumentation, control and automation in wastewater – from London 1973 to Narbonne 2013
Key developments of instrumentation, control and automation (ICA) applications in wastewater systems during the past 40 years are highlighted in this paper. From the first ICA conference in 1973 through to today there has been a tremendous increase in the understanding of the processes, instrumentation, computer systems and control theory. However, many developments have not been addressed ...
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Monitoring of reservoir feed for hydrocarbon contamination - Case Study
APPLICATION Monitoring of rural watercourse feeding a small reservoir to detect contamination from farm or food processing facilities. CUSTOMER Water Company, SW England PROBLEM Persistent small contamination events had put the reservoir which feeds a drinking water treatment plant at risk. Low level contamination preceded a large event in late ...
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Dissolved organic nitrogen (DON) in a full-scale drinking water treatment plant
Dissolved organic nitrogen (DON) is currently considered as one of the most important parameters in drinking water treatment due to its potential to form toxic nitrogenous disinfection by-products (N-DBPs). A comprehensive investigation was made in this study on the variation of DON in a full-scale drinking water treatment plant with a treatment train of coagulation/sedimentation, biofiltration ...
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Competitive adsorption of micropollutants and NOM onto activated carbon: comparison of different model approaches
Conventional adsorption models are not able to describe exactly the competitive adsorption of natural organic matter (NOM) and micropollutants during drinking water treatment with activated carbon. This problem is a consequence of the complex structure of natural organic matter. In the last years, two user-oriented model approaches, the tracer model (TRM) and the equivalent background compound ...
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Rapid small-scale column tests for Cr(VI) removal by granular magnetite
This study evaluates the possibility of using magnetite as an adsorbent for the removal of Cr(VI) in a bed column setup under continuous flow conditions. For this purpose, granular magnetite was synthesized on a large scale and tested in both batch and rapid small-scale column experiments using reliable conditions of drinking water treatment. Column tests, which were designed to scale-down ...
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Why is drinking water treatment necessary?
Water is found in ample amount almost everywhere on earth. The natural water resources such as lakes, rivers, etc. that provide water contain a lot of pollution, garbage which is unfit for human consumption. To clean the water, it should undergo numerous water treatment media procedures that make it suitable to drink. The water purifiers designed to eliminate or reduce certain types of pollutants ...
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Coagulation and flocculation in the Helsinki drinking water treatment plant
The raw water for Finland’s capital Helsinki is pumped from Lake Päijänne, located approximately 120 km away, via a tunnel to two water treatment plants, where it is treated and purified. This secures sufficient drinking water of excellent quality for around one million people. In the drinking water treatment plant in Vanhakaupunki 18 HYPERCLASSIC® Evolution7 mixers and three ...
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The effect of immobilized catalyst structure on the degradation of chemical and biological contaminants in simulated solar photocatalytic water purification
The performance of different configurations of titanium dioxide-coated foam supports as photocatalysts in an enhanced solar disinfection system for drinking water treatment was evaluated, using the reduction of methylene blue, 1-4-dioxane, and Escherichia coli as performance indicators. Reactors with immobilized catalysts were able to match or surpass the performance of a suspension ...
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AMONCOURT, France: Skid–Elimination of turbidity and microbiological retention
In 1988, the town of Amoncourt fitted out with first drinking water treatment plant using Ultrafiltration membrane process: the world first. The plant's planned operational life was 7 years. It will haveoperated to full satisfaction for 15 years. The site was specially monitored by the Ministry of Health. On the basis of these results, it gave sanitary approval to the clarification-disinfection ...
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Instrumentation, Control and Automation in wastewater ? what happened from London 1973 to Narbonne 2013. Water Science & Technology
Abstract: Key developments of instrumentation, control and automation (ICA) applications in wastewater systems during the past 40 years are highlighted in this paper. From the first ICA conference in 1973 through to today there has been a tremendous increase in the understanding of the processes, instrumentation, computer systems and control theory. However, many developments have not been ...
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