Key Issues & Industry Updates
Water Quality Products
September 2007
By Stephanie Harris
Water Quality Products invited Joseph F. Harrison, P.E., CWS-VI, technical director of the Water Quality Association (WQA), to give an overview of current industry issues and what to expect at the upcoming Mid-Year Leadership Conference, to be held Sept. 5-7 in Nashville, Tenn.
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Desalination Challenges
Water Quality Products
July 2006
By Zoe Grosser
Overcoming measurement obstacles in the desalination process
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RO Membrane Technology
Water Quality Products
April 2005
By Jorg Menningmann
Desalination systems based on reverse osmosis technology are increasing the availability and quality of clean drinking water in Toas Island in Lake Maracaibo, Venezuela
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Selecting a Pump for Seawater Reverse Osmosis
Water Quality Products
September 2003
Darla Jean Thompson, CAT PUMPS
Although the pump is a relatively small part of the overall cost of an RO system, expenses resulting from downtime and inefficiency quickly can diminish the productivity of the system and your return on investment. Due to the corrosive atmosphere and high demands on these sea water RO systems, special attention is required in the pump selection process. There are several key factors that will help to ensure optimum pump and system performance.
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Brominated Resins
Water Quality Products
July 2003
Ken Korslin, CWS-III, Pentair Water Treatment, Plymouth Products Division
In 1957 The Dow Chemical Corp. addressed the negatives of using bromine by creating a brominated ion exchange resin, which opened up the use of bromine in offshore water treatment applications.2 Today, polybromide resin is used in many offshore water treatment systems. The fact that bromine can be added to water that previously has been chlorinated makes polybromide resin a practical solution to accommodate the multiple sources of water in offshore applications.
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Taking the Salt Out
Water Engineering & Management
April 2003
Bill Swichtenberg
Five large municipal water agencies have combined to advocate a significantly increased federal role in encouraging desalination. The group sees desalination as a viable, cost-effective way of making seawater and brackish groundwater reliable sources to supplement national drinking water supplies.
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Desalination in America
Water Quality Products
November 2002
John B. Tonner, Water Consultants International
On average there are 50 to 75 significant desalination projects per year in the United States with an average capacity of approximately 1 million gallons per day. The majority of these projects utilize membrane processes such as nanofiltration (NF) or reverse osmosis (RO).
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Groundwater Crisis and Sustainable Agriculture in Northern China
Water Engineering & Management
April 2002
Zhang Guang-xin and Deng Wei
Although China ranks sixth in the world in total water resources, there is a shortage. The average water resources per capita is 2,300 m3, making it only one fourth of the world average per capita, while the unit plantation area of water resources is only one half the world’s average value.
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Production of High Purity Water From Seawater
Water Quality Products
March 2002
Contributed by Ted Prato, Erik Schoepke, Lance Etchison, Tom O’Brien, Brian Hernon and Kit Perry, I
The Diablo Canyon Power Plant at Avila Beach in California utilizes seawater for both cooling water and makeup water for steam generation. Ionics, Inc., Watertown, Mass., designed and built and now operates a complete water treatment system serving the high-purity water needs of this power plant. Over the past eight years, the seawater treatment section has demonstrated excellent long-term performance as a result of strong design, consistent maintenance and qualified operators.
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Project Compares Brackish Water Desalination Technologies – Part 2
Water Engineering & Management
March 2002
Jim Passanisi, Janet Persechino and Todd K. Reynolds
Part one of this article appeared in the February issue and described how nanofiltration, reverse osmosis and electrodialysis reversal are being run side-by-side at the Brackish Water Demonstration Facility in California.
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Project Compares Brackish Water Desalination Technologies - Part 1
Water Engineering & Management
February 2002
Jim Passanisi, Janet Persechino and Todd K. Reynolds
In Port Hueneme, California, a state-of-the-art desalination facility uses three brackish water desalination technologies: reverse osmosis (RO), nanofiltration (NF) and electrodialysis reversal (EDR), operated side-by-side to produce over three million gallons per day (mgd) of high quality drinking water. The Brackish Water Reclamation Demonstration Facility (BWRDF) is the cornerstone of the Port Hueneme Water Agency’s (PHWA) Water Quality Improvement Program. In addition to providing desalted water for local use, the BWRDF also serves as a full-scale research and demonstration facility.
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High-Tech Products: Instrumentation
Water & Wastes Digest
October 2001
Sensors and Analyzers Prove Instrumental in Preserving Civil War Sub: Recovered Submarine Requires Chloride Removal to Prevent Rust and Corrosion
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Seawater Desalination With Reverse Osmosis
Water Quality Products
March 2001
Jorg Menningmann, Waterlink Pure Water Division
Desalination technology has brought fresh water and hence industrial and commercial development to areas of the world that otherwise might have remained unproductive. Not only has development been enhanced by this technology but, more importantly, the health and welfare of many people have been improved by the supply of sanitary fresh water supplies.
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Improving the Quality of Deionizers
Water Quality Products
March 2000
Jim Sabzali and C.F. Chubb Michaud
Though both the cation and the anion resin are responsible for the quality of a deionization (DI) system effluent, it is the cation resin that is the big contributor to leakage.
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Desalination of Seawater and Brackish Water
Water Quality Products
January 2000
Wil Pergande and Barry Abolmaali
The increasingly broad range of requirements for water quality has motivated the water treatment industry to refine existing techniques, combine methods and explore new water purification technologies including desalination.
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Guidelines for Cation Resin Replacement
Water Quality Products
September 1999
Francis J. DeSilva
This article discusses strong acid cation resin typically used in water softeners or as the first unit in a two-bed cation-anion demineralizer.
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