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Hawaii-RO
Membrane Filtration
November 2007
By Water Quality Products
Twin multimedia filters improve water quality at a Hawaii power plant
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Reverse Osmosis
Water Quality Products
December 2005
Derek Sajdak
Evaporative cooling or misting systems have become one of the most popular tools to deal with hot weather in the southwestern U.S. Typically, the systems are used commercially to cool outdoor public spaces such as restaurant dining areas, patios and pavilions, and common areas at community parks and hotels. But they can also be found in “wandering” areas at nurseries, in tents and even ticket lines.
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Reverse Osmosis
Water Quality Products
November 2005
David Lazar
In 1954, the U.S. Navy launched the Nautilus, the first nuclear powered submarine. Using nuclear power to generate steam to drive a submarine’s propulsion system allows the vessel to stay under water for long periods of time without refueling. Nuclear power is now the primary method of generating power for propulsion for the U.S. Navy’s fleet of fast attack and ballistic missile submarines.
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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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Perchlorate Removal
Water Quality Products
March 2005
By Frank DeSilva
The dissolution of ammonium, magnesium, potassium, or sodium salts into the groundwater pose a threat to drinking water supplies.
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Chromium: Getting the Facts Straight
Water Quality Products
April 2004
By Wendi Hope Bishop, WQP Staff
Chromium is most toxic in the man-made form produced in the manufacturing of paint pigments, metal coatings, cement, rubber, glass and other materials.
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Navigating Changing Feedwater Conditions
Water Quality Products
March 2004
Contributed by Crane Environmental
Crane Environmental installed a reverse osmosis unit to supply clean feedwater to boiler units for electricity at a resource recovery plant.
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Preengineered Systems Don't Always 'Fit'
Water Quality Products
September 2003
Dale B. Langefels, Tenergy Water LLC
Whether it is an issue of limited space, material compatibility or just challenging feed water, there always will be a need for custom-engineered solutions in the water treatment industry. Lee Co. of Nashville, Tenn., first looked at preengineered reverse osmosis (RO) systems from its local water treatment equipment dealers. The company quickly realized that this approach would not fit a particular situation.
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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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Metals Plant Needs High-Purity Water
Water Quality Products
July 2003
Crown Solutions, Inc.
Dayton Progress Corp.'s focus has been on manufacturing metal punches, punch blanks and metal stamping tools. It also would take experienced water treatment professionals to ensure that the proper quality water was used in each process. That is why it relied on Crown Solutions, Inc. to manage the point-of-use (POU) and point-of-entry (POE) water treatment for each of its manufacturing processes that required water.
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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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Chesapeake Seals the Deal
Water Engineering & Management
May 2003
Watertight Storm Sewer Group
The City of Chesapeake, Va. is located in the region called Hampton Roads, the 27th largest metro area in the country with more than 1.5 million residents. With an annual rainfall of approximately 48", its designers must contend with the prospects of determining where 294 billion gallons of water will go. A large share of this rainfall will find its way into the storm sewers. Last year, the City Council appropriated an extra $467,600 for contract cave-in repairs. The City of Chesapeake has recognized this problem and is developing a program to address it.
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Zero Waste: A Look at the Future of Reverse Osmosis
Water Quality Products
March 2003
Josh Hanford, Watts Industries
Most reverse osmosis systems waste as much as 20 gallons just to produce one gallon of product water. The new technology called "ZeroWaste" eliminates this problem by returning the concentrate water from the reverse osmosis system back to the home's plumbing, resulting in 100 percent efficiency.
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Arsenic Treatment Options for the Southwest
Water Quality Products
February 2003
Arizona Water Quality Association
While high concentrations of arsenic are found mostly in the Western region of the United States, parts of the Midwest and New England show levels of arsenic
that exceed the newly approved U.S. Environmental Protection Agency (EPA) standard of 10 parts per billion (ppb). Individuals not willing to wait for their water system's compliance with the arsenic standard currently are looking for treatment systems to use in their homes. POU and even point-of-entry (POE) treatment systems are an attractive solution for these individuals. The process should begin with a basic understanding of arsenic contamination and the element's chemistry, a complete water quality analysis of the application-specific water and the knowledge of available technologies.
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Point-of-Use Reverse Osmosis
Water Quality Products
February 2003
Tony Pagliaro
As the residential point-of-use (POU) reverse osmosis (RO) industry approaches its 35th anniversary, it is time for a reality check on the industry's progress to date as well as a look ahead to new technologies or improvements that the industry may introduce for POU RO systems in 2003.
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Have You Hugged Your RO Today?
Water Quality Products
January 2003
Carl Davidson
You have to be completely sold and very enthusiastic about your product in order to be able to sell. I thought you might be interested in how I was made more aware of just how wonderful it is to own an RO system.
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Reverse Osmosis - Anion-Filtration Water Plant Run by a Single Automation Platform with Fieldbus Communications
Water Engineering & Management
January 2003
Robert Oreskovich, John Contestable, Ken Flatt, Ian C. Watson, P.E., and John Rifleman
A new 3.0 mgd water treatment plant on North Carolina's Cape Hatteras is believed to be the first in the United States to apply Foundation fieldbus for device-level control communications. The plant, built by the Dare County Water Department near the famous Cape Hatteras Lighthouse, has been operating without a problem since startup more than two years ago. Fieldbus has been widely applied in all process industries including electric power generation, an industry also cautious to adapt new technology.
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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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Mississippi Town Installs Nation's First RO/Ozone System
Water & Wastes Digest
November 2002
The City of Pascagoula, Mississippi turned to Osmonics of Minnetonka, Minn., to provide a viable solution for the removal of undesired characteristics from their water supply, ensuring compliance with existing and 2001 EPA regulations. Osmonics' process of combining low energy RO in tandem with ozone generation and contacting equipment proved to be the optimal solution to Pascagoula's water deficiencies.
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The Critical Step
Water Quality Products
July 2002
Carl Davidson
I am always shocked to see how few salespeople use a value justification. In my view, this is a critical step in the selling process. Let’s take a look at some of the advantages this technique gives you and then we will look at the actual script for a justification.
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Back to the Basics, Part 2
Water Quality Products
June 2002
Jeff Roseman, CWS-1, Aqua Ion Plus+ Technologies
How does everyone achieve effluent water that meets their needs and demands? Each situation is different, but a simplistic explanation of various technologies will be discussed in this article. Each of the following categories has had much written about them, but this article will be an overview of several methods in order to help you educate the general public so they can make an intelligent decision, purchase something of value and continually seek professional consultation.
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Electronic Scale Treatment
Water Quality Products
April 2002
Jeffrey M. Conway, ClearWater Enviro Technologies, Inc.
A new technology has emerged that can solve scale problems without the need of salts, chemicals or maintenance.
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POU Technology Demonstrates Effectiveness
Water Quality Products
March 2002
By Jennifer Mathis, Apyron Technologies, Inc.
In March 2001, the U.S. Environmental Protection Agency (EPA) withdrew a proposal for a lower maximum contaminant level (MCL) for arsenic in drinking water that would bring the standard from 50 parts per billion (ppb) to 10 ppb. At that time, the EPA commissioned three studies to examine the benefits, costs and health effects associated with a lower standard for arsenic.
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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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Plastic Pipes Handle Pressure from RO Plant
Water Quality Products
January 2002
Submitted by the Plastics Pipe Institute
The El Paso County Water Authority was in need of a cost-effective pipe for its reverse osmosis treatment project to supply clean water. A competitive price won the attention of a Texas engineering firm to high density polythylene (HDPE) pipe. HDPE?s performance won some loyalty.
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RO Maintenance
Water Quality Products
January 2002
Nevin Rudie
Understanding and reacting to the performance of a reverse osmosis (RO) system is necessary for continued successful operation. It is this interaction that allows us to quickly and correctly identify and correct issues that may arise.
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Bioterrorism May Pose Threat to Water Supplies
Water Quality Products
December 2001
Wendi Hope King
If our water supplies actually do come under attack, the question remains: Is there any way for consumers to protect themselves? Unfortunately, it seems to be too early to tell, yet some companies are beginning to emerge with products that may be the answer.
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Pure Water the Way It Was Meant to Be
Water Quality Products
November 2001
By Michael Pennington, Severn Trent Services
As the public becomes more health conscious and educated about water contamination, demand for bottled water continues to increase. In order to provide purified water, it is important to understand the reverse osmosis (RO) water purification process.
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POU Options for Arsenic
Water Quality Products
November 2001
The topic of arsenic has received a lot of press coverage this year, ever since the Bush administration halted the EPA’s newly issued maximum contaminant level (MCL) of 10 parts per billion (ppb). Since then, the MCL was reinstated back to 50 ppb and further discussions and studies have continued. This article will discuss some of these updates.
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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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Editorial: Home Buyer Awareness
Water Quality Products
January 2001
Wendi Hope King
I have started the new year on the right foot. I bought a house. I have spent many years day dreaming about my first home.
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Nanofiltration Membranes
Water Quality Products
January 2001
Harold Nicoll
Nanofiltration is a liquid separation membrane technology positioned between reverse osmosis (RO) and ultrafiltration.
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Justifying the Value of an RO
Water Quality Products
November 1999
Carl Davidson
There are solutions that work when a customer says "no" such as justifying the value and showing the customer he’ll be dollars ahead. What follows is a list of questions for the customer and then various scenerios that will refer you back to them.
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Problem Solver: Reverse Osmosis Removes Hexavalent Chromium from Groundwater
Water Quality Products
August 1997
A rural chrome plating facility faced a critical waste removal problem. Over time, a significant quantity of toxic hexavalent chromium had leaked from their facility into the ground and contaminated nearby wells. A government regulatory agency threatened legal action if the facility was not able to reduce the hexavalent chromium concentration in the groundwater by 99.9 percent.
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Reverse Osmosis
Water Quality Products
October 1996
David Lazar
Dual-pass RO system reduces cost and monitoring for Navy lab
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Rethinking ANSI/NSF Standard 58
Water Quality Products
August 1996
Nancy Culotta
The Joint Committee voted to remove the arsenic reduction claim from Standard 58 until a new test method is developed.
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