drinking water treatment system Articles
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Multicriteria decision analysis for the selection of a small drinking water treatment system
The selection of a small drinking water treatment system for a hydro-electrical plant is addressed within a multicriteria and participatory decision analysis process. As a first step, based on problem constraints, we identified and retained three water treatment systems alternatives. In close collaboration with the stakeholders, we then defined and obtained weights for criteria that take into ...
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Acute toxicity and inactivation tests of CO2 on invertebrates in drinking water treatment systems
In addition to the esthetic problem caused by invertebrates, researchers are recently starting to be more aware of their potential importance in terms of public health. However, the inactivation methods of invertebrates which could proliferate in drinking water treatment systems are not well developed. The objective of this study is to assess the acute toxicity and inactivation effects of CO2 on ...
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Practical challenge testing of a ceramic membrane module in a full-scale mobile drinking water treatment system
Challenge testing was carried out of full-scale prefiltration and ceramic ultrafiltration (UF) modules in a mobile drinking water treatment system. Three consecutive indirect integrity tests were performed using naturally contaminated public drinking water, stocking with wastewater as well as addition of powdered activated carbon. Besides checking the removal efficiency and integrity of the ...
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Inhibition of Daphnia magna's occurrence in drinking water treatment process by controlling its phototactic behavior
Cladocera zooplankton as carriers of bacteria result in biological risk due to their occurrence in drinking water treatment systems. In this paper, bench-scale experiments were performed to investigate the inhibition effect on Daphnia magna (D. magna) by controlling its phototactic behavior. The results showed that UVA had a negative effect on the phototaxis of D. magna, indicating an active ...
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Fouling of low-pressure membranes during drinking water treatment: effect of NOM components and biofiltration pretreatment
Fouling is a major challenge for low-pressure membrane drinking water treatment systems. Previous research has demonstrated that under the right conditions, biofiltration is an effective method to reduce fouling of low-pressure polymeric membranes. This study provides additional insight into the effect of biofiltration as a pretreatment for fouling reduction by using river water with different ...
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Innovative Solutions for Decentralized Wastewater Treatment
Chlorination and UV light are currently the most common methods used for disinfection of wastewater. While these processes are generally well-adapted to community or municipal installations, their operation and maintenance needs present some limitations to assure sustainable performance at the level of individual wastewater treatment systems. As reported in many papers (U.S. EPA. 1999), use of ...
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4 Benefits of Sodium Zeolite Media for Drinking Water Filtration
Potable water treatment systems have little room for error after treatment at the risk of public health. Use of treatment systems that effectively target and treat toxic and undesirable contaminants is essential to drinking water production. There are typically four stages in a standard drinking water treatment system process, coagulation/.flocculation, sedimentation/clarification, filtration and ...
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What is Sustainable Flocculation and What are Sustainable Flocculants?
What is Sustainable Flocculation? In most standard drinking water and wastewater treatment systems, there is a flocculation process that is used to reduce the concentrations of solids within the effluent stream. This particular process makes use of substances that aid in the clumping together of suspended particles among other contaminants in a clarifier system. Sustainable flocculation ...
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Identifying drinking water and water treatment systems vulnerabilities using the CARVER matrix method
Originally designed for target analysis, CARVER is an acronym for the vulnerability assessment elements of criticality, accessibility, recuperability, vulnerability, effect and recognisability. Every category is assessed for each component or subcomponent of a designated target. Scoring can be based on any scale but typically ranges from the lowest significance of 1, to the highest significance ...
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Using Biological Filtration to Remove Arsenic from Drinking Water
In 2001, the U.S. Environmental Protection Agency changed the standards for arsenic levels in drinking water. At that time, the agency had estimated that more than 36 million Americans were drinking water that contained arsenic levels at or above 3 parts per billion. A new standard was set, lowering the maximum contaminant level to 10 parts per billion (ppb) from the previous standard of 50 ppb. ...
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World Toilet Day 2022 Making the invisible visible
Despite the progress over the past twenty years, sanitation is still one of the Sustainable Development Goals that is furthest out of reach. For this reason, on November 19, Almar Water Solutions mobilizes to make the invisible visible. Access to sanitation and hygiene services are vital for people’s health. However, the figures for poor water management and quality are alarming. 3.6 ...
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Orchard Highlands - USEPA Arsenic Treatment Demonstration - Goffstown, New Hampshire
In 2004 AdEdge Technologies Inc. (AdEdge) was selected to implement six fullscale arsenic treatment demonstration projects as part of the USEPA Office of Research and Development arsenic research program (Round 2). These six sites were in addition to three USEPA Round 1 demonstration sites awarded to AdEdge in 2003. The purpose of the research effort is to provide information to fill-in gaps ...
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Monitoring, environmental emergencies management and water treatment improvement of freshwater lakes in China: the Chao Lake case study
Severe eutrophication of freshwater lakes, with the subsequent risk of algal blooms, has a critical effect on the safety of drinking water supplies in China and is one of the main environmental emergencies in the country. This paper focuses on Chao Lake, a large, shallow eutrophic lake used as a source of drinking water. The study considers the possibilities of improving the lake monitoring ...
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What are the storm water treatment areas and how is it beneficial for the beneficiaries?
Safe drinking water is going scarce all around the world for the growing population and pollution! Increased rates of water usage in industrial as well as residential areas are the specific reasons behind this. Billions of people are away from easy access to safe drinking water. Apart from this, water borne illness has turned as one of the leading cause for growing the death rates. Lack of clean ...
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Benefits of Anthracite Carbon Media for Municipal Potable Water Treatment Applications?
Treating water to be of potable water quality requires fairly considerable treatment based on initial water quality. Many tend to jump straight to thinking about more technologically advanced treatments like reverse osmosis and the similar. Of course, there is a bit more involved in drinking water treatment for municipalities. However, anthracite carbon media has been used extensively in ...
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System Life Cycle EvaluationSM (SLiCE): harmonizing water treatment systems with implementers' needs
One of the methods proposed to improve access to clean drinking water is the mobile packaged water treatment system (MPWTS). The lack of published system performance comparisons combined with the diversity of technology available and intended operating conditions make it difficult for stakeholders to choose the system best suited for their application. MPWTS are often deployed in emergency ...
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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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What Makes GWT Advanced Treatment Technologies Different than Others
Advanced oxidation systems can treat water from a wide range of sources. All kinds of industries produce pollutants that conventional treatment systems cannot typical treat; this requires advanced treatment technologies. If those pollutants are not treated, they typically end up in water sources that are used for drinking water. If conventional drinking water treatment systems cannot treat & ...
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Filtronics’ NSF Certified Electromedia sets the standard for water filtration industry
The key to any water treatment system and its efficiency and effectiveness is its filtering media, or the sand or gravel that helps to remove pollutants and contaminants from a water source. Filtronics’ exclusive Electromedia is a permanent filtering media that is National Sanitation Foundation (NSF) certified and easily the most effective and economic filtering media available today. With ...
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Recycle of waste backwash water in ultrafiltration drinking water treatment processes
In drinking water treatment, ultrafiltration (UF) membrane systems are generally operated at 90 to 95% recovery with production losses resulting from waste residual streams such as backwash water and clean-in-place (CIP) liquid residuals. In drought-prone regions, it may be desirable to apply alternative UF plant design configurations to increase recovery rates and minimize water loss. This ...
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