drinking water treatment Articles
-
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 ...
-
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 ...
-
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 ...
-
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 ...
-
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 ...
-
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 ...
-
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 ...
-
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 ...
-
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 ...
-
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 ...
-
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 ...
-
Ultrasonic removal of cyanobacteria
This paper studies the ultrasonic removal of cyanobacteria. The results show that ultrasound is an effective way to reduce the water turbidity and to damage chlorophyll a, the antenna complex. Furthermore, 55% of the cyanobacteria were removed after 5 min treatment and no rebound was observed after 3 h. The ultrasonic cyanobacteria removal followed a pseudo first-order reaction and the rate ...
-
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 ...
-
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 ...
-
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 ...
-
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 ...
-
Permanganate Monitoring and Dosing for Drinking Water Treatment
Although an effective treatment aid, residual permanganate in your treated water is undesirable and often leads to consumer complaints when pink water pours out of their tap. Careful control of permanganate dosing can be achieved with real-time permanganate monitoring, resulting in many benefits including: Real-time feedback control to optimize permanganate dose Immediate corrective action to ...
-
Biological Filtration: Future of Drinking Water Treatment
Water is essential for all human life on the planet, but the fresh water supply is limited and is susceptible to being contaminated by all manner of toxins like arsenic, calcium, and mercury. There are many techniques to remove contaminants, including popular methods that add chemicals to balance others out, but one that not many people understand is biological water system filtration. Biological ...
-
Biological drinking water treatment Hong Kong
The water treatment works takes water from the river Dongjiang in the Guangdong Province north of Hong Kong. The raw water has an average turbidity level of around 11 NTU and contents, among other things, ammonia and manganese. Water temperatures range from 12 to 34oC. During planning of the waterworks use of primary aerated biological filters (PABF) was selected for removal of ammonia and ...
-
Effect of advanced oxidation processes on nonylphenol removal with respect to chlorination in drinking water treatment
Any nonylphenol compounds found in water have to be removed since they are endocrine disruptors. In this study, natural water from the river Ebro fortified with nonylphenol compounds (4n-nonylphenol and technical nonylphenol) is used as a sample in order to simulate a real situation in drinking water treatment plants. The aim is to compare conventional disinfection with advanced oxidation ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you