Featured Articles
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White Paper: Boiler Water Treatment Chemicals, Feed, And Control - Perhaps It Is More Complicated Than We Thought
3/18/2011
Chemicals used to treat steam boiler systems are applied based upon the demand and mode of reaction of each chemical used. The theoretical versus actual consumption and the ease of control of these chemicals can vary according to many factors specific to each application. By Dave Christophersen, Veolia Water Technologies
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Article: Microbiological Control Strategy In Cooling Tower Systems
8/26/2010
Because evaporative cooling tower systems are open to the atmosphere and sunlight, they are prone to microbiological (MB) activity and the resulting adverse affects. Pathogenic microbes such as Legionella pneumophila can create health concerns. By Dave Christophersen, Vice President/Technical Manager
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Article: Using Reverse Osmosis For Boiler Pretreatment
8/26/2010
There are numerous makeup water pretreatment strategies for boiler systems including softeners, dealkalizers, demineralizers, and reverse osmosis. By James McDonald and Dave Christophersen, CWT
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White Paper: Understanding Differences Of Boiler Feedwater Pretreatment Equipment
8/26/2010
As a water treatment professional, there are several reasons for understanding the various types of boiler pretreatment equipment. It is helpful to grasp all selection criteria for the type of pretreatment. These factors are used for deciding what new equipment to install or why the existing equipment is appropriate or not appropriate. By Dave Christophersen, Veolia Water Technologies
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White Paper: Water Reuse Strategies: Steel Industry Case Studies
8/26/2010
The steel industry has historically presented challenges for effective water treatment because it is a high water user and the applications may involve high heat, critical noncontact cooling, direct contact cooling, high suspended solids waters, oil and grease contamination, and complicated cascading. By Dave Christophersen, Veolia Water Technologies
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Article: Reducing Cooling Tower Operating Costs
8/25/2010
A midwestern industrial plant had a problem. The plant had a cooling tower that supplies cooling water to air compressors, oil coolers, air dryers, and various process equipment. By James McDonald, PE, CWT
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Innovative Technologies For Stormwater And Combined Sewer Management
4/18/2010
Stormwater flows have historically been considered as harmless by the general public and system designers. Recent studies have shown that these flows cannot be dismissed as easily. Chebbo (1992), Marsalek (1997) and Valiron (1992) have shown that stormwater is a source of diffuse pollution with a high source of suspended solids (SS), adsorbed hydrocarbons (HC), nutrient loads (N, P, etc.) and heavy metals (Pb, Cr, etc.), which ultimately influence the quality of the receiving body of water. By Martin Couture and Gianfranco Maragno, Veolia Water Technologies
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Global Approach To Wet Weather Issues: Key Steps To An Improved Water Quality
12/28/2008
Wet Weather issues have evolved over the last generation. From an environmental side issue twenty years ago, they have gained the forefront of environmental concerns. This paper will present the key steps to achieve a global approach to Wet Weather issues. Each of the best management practices available have been ranked and reduced to critical steps that can be implemented sequentially in order to achieve an optimized global approach to wet weather issues. By Martin Couture, Alan Steele, Veolia Water Technologies
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Article: Developing Sustainable Water Strategies
10/7/2008
Sustainable strategies can be defined in many ways for an organization. In the context of water resources, a framework can be placed around the definition of sustainable strategies for the purposes of developing a formalized plan for addressing water resources.
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Evidence Of A Critical Velocity In Underflow Baffle Design For Floatables Control In Combined Sewer Overflows (CSOs)
5/22/2008
Underflow baffles have gained in popularity over the last few years as a viable mean to intercept floatables in Combined Sewer Overflows (CSOs). This has happened in consideration of the extremely low application cost of the solution although the efficiency of underflow baffles has never been clearly proven.