Pool & Spa Disinfection   Water Quality Products May 2003   Jeff Roseman, CWS-I, Aqua Ion Plus+ Technologies
This article will address the use of ozone, copper ionization and proper injection of chlorine for a reduced approach to chemicals in providing a clean, clear, healthy pool and spa experience.
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E. Coli   Water Quality Products May 2003   Danielle Duclos
This article provides a general overview of E. coli and drinking water as well as current and emerging monitoring and decontamination technologies.
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Nonchemical Alternatives to Cooling Tower Disinfection   Water Quality Products April 2003   Jeff Roseman, CWS-I, Aqua Ion Plus+ Technologies
By explaining some tips and tricks, maybe more water treatment dealers can understand these technologies and use them in their arsenal of treatment methods. Filtration, ozonation, copper ionization and UV light may not be an option on some water supplies or applications, but their usefulness and alternatives to chemical dosing should be considered as an option.
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Taking the Mystery Out of UV Air Purification   Water Quality Products February 2003   Cameron Tapp, ClearWater Tech LLC
The U.S. Environmental Protection Agency's (EPA's) studies of human exposure to air pollutants indicate that indoor levels of pollutants may be two to five times--and occasionally more than 100 times--higher than outdoor levels. For many dealers, it is a natural progression from improving a home's water quality to improving its air quality. Ultraviolet (UV) air purification is both a simple and cost-effective option for many consumers. Alone or combined with other technologies, UV can help address many of the concerns consumers have about their home's air quality.

Disinfection, Part 1: Developments in Ultraviolet Disinfection   Water Quality Products January 2003   Bruce Laing, Trojan Technologies, Inc.
One of the fastest growing technologies in the water treatment industry is ultraviolet (UV) disinfection. UV disinfection adds no chemicals, and it does not produce byproducts. Additional benefits include easy installation, low maintenance, minimal space requirements and whole-house (point-of-entry) treatment.
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Ultraviolet Technology   Water Quality Products December 2002   Jeff Roseman, Aqua Ion Plus+ Technologies
The use of quartz sleeves in ultraviolet (UV) light's treatment of water has been the medium of choice for many years. Now there seems to be an upheaval in the ranks, which brings into light compact system designs, longer contact times, less shadowing, cost savings and easier, safer change outs. Coiled fluoropolymer tubes are not new--they have been used in the Asian market for more than eight years. They may not be as time tested as their quartz counterpart, but the coiled tubes offer a very promising change in UV water treatment.
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Air Purification with Ultraviolet Light   Water Quality Products December 2002   John Garrett, Biozone Scientific
While consumer demand has escalated for water purifying devices, it pales in comparison to what has happened in air purifying. The indoor air purification industry still is in its infancy, yet is recognized by the Environmental Protection Agency (EPA) to be a market valued well into the billions.
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Ultraviolet Disinfection of Drinking Water: A Growing Trend   Water Engineering & Management November 2002   Richard G. Protasowicki, P.E.
The use of ultraviolet (UV) light for the treatment of drinking water is becoming more acceptable by both the public and regulatory agencies as an alternative disinfectant. Water suppliers that are developing new water treatment facilities or modifying existing ones now commonly investigate this technology to determine its applicability to their treatment processes.
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Situation Normal During a UV Disinfection Retrofit   Water Engineering & Management November 2002   Brian M. Balchunas, P.E., and Lawrence H. Hentz, P.E., D.E.E.
At the Patuxent Water Reclamation Facility in Anne Arundel County, Md., a carefully considered construction sequence will keep the facility in operation during its retrofit from chlorine to UV disinfection. Construction started in June 2002 and is expected to be complete by summer 2003.
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Developments in Ozone Technology   Water Quality Products July 2002   Rip G. Rice, Ph.D., RICE International Consulting Enterprises
Ozone technology developments have opened new applications for these established water treatment technologies. Driving these changes has been the identification of new, more disinfection-resistant microorganisms such as Giardia and Cryptosporidium cysts and governmental regulations designed to protect the public health from the hazards of ingestion of these microorganisms. Additionally, the desire to prevent or minimize the formation of halogenated disinfection byproducts formed during chlorination has stimulated new interest in the use of ozone. Combinations of ozone with hydrogen peroxide and/or ultraviolet (UV) radiation can destroy many contaminants present in ground water.
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Ultraviolet Dechlorination Technology   Water Quality Products July 2002   Aquionics
At the Procter & Gamble manufacturing plant in Greensboro, N.C., an Aquionics ultraviolet (UV) dechlorination unit was installed before two banks of reverse osmosis (RO) membranes. Trials that ran soon after the UV system’s installation showed a dramatic reduction in the RO membrane wash frequency—down from an average of eight cleanings per month to only two per month.
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River Contaminates Town’s Water Supply When State Leaves It to Beavers   Water Engineering & Management July 2002   Louis Manring
For nearly 70 years, the public water system in the Town of Sterling, Massachusetts operated without incident, delivering clean water to more than 2,000 homes. Because the water from the town’s well field was clean and free of contamination, there was no need for a permanent disinfection system. That all changed in September 1999 when a storm caused by Hurricane Floyd and the state’s increasing beaver population combined to cause bacterial contamination in the town’s water supply.
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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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Back to the Basics, Part 1   Water Quality Products May 2002   Jeff Roseman, CWS-1, Aqua Ion Plus+ Technologies
Basic water chemistry, terminology and applications can be very complicated and not seem so basic to individuals without a chemistry background. This series of articles will help shed light on the chemistry of water and the mysteries that it can contain, plus explain the technologies used to treat water so the purchaser can make an educated attempt to find the right solution for a particular application. There are no cut-and-dry formulas for water treatment and certainly no cure-all for every application or problem, but with an understanding of how water works and the technologies developed to treat water, a person can utilize his resources to come up with solutions for his particular need or application.
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Ultraviolet for Disinfection   Water Quality Products April 2002   Tom Schaefer, Aquionics
Historically, industry has relied on hazardous chemicals such as chlorine and expensive processes such as pasteurization to rid its water supplies of pathogens. Currently, though, the use of ultraviolet (UV) light, the same as the portion of the electromagnetic spectrum of sunlight responsible for killing microorganisms, is providing a safe, reliable and highly effective method of getting the job done.
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New Test Technique Measures Light to Gauge Toxicity   Water & Wastes Digest January 2002
Security measures do exist to safeguard our public water supply. Utilities routinely employ techniques such as chlorination, filtration, and ultraviolet treatment, to name a few. However, given the changes that have taken place in the world since September 11, 2001, the prospect for intentional contamination seems more possible than ever before. We want to have confidence that our existing security measures and analytics are adequate but with so many possibilities, how can we?

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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Water and Air UV Treatment   Water Quality Products November 2001   By Bak Srikanth, Aquafine Corp., and David Witham, UltraViolet Devices, Inc.
UV is an accepted and rapidly growing technology for treating wastewater in the United States. In Europe, it commonly is used as a primary disinfectant in municipal drinking water systems. Other applications include food and beverage, pharmaceutical, semiconductor and power generation. This article will discuss three other commercially successful and growing applications.
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Reclaim Greenhouse Water   Water Quality Products October 2001   Jeff Roseman, CWS, Aqua Ion Plus+ Technologies
Reclaiming water in the greenhouse industry will soon be something the government will be mandating the growers in the industry to do, as more wells are becoming contaminated from nitrates and phosphorus levels are becoming a concern for public health.
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Ultraviolet   Water Quality Products July 2001   Adam Donnellan, Sunlight Systems
While UV disinfection is an effective way to deliver microbiologically safe water, understanding local regulations for its use can be more complicated than understanding how UV scrambles a microorganism’s DNA.
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Commercial, Industrial Ultraviolet Systems   Water Quality Products June 2001   Adam Donnellan
In past articles, we discussed the benefits of ultraviolet (UV) disinfection as well as the many available options. In this article, we will focus on the available technologies and provide an overview of how these technologies are being applied in commercial and industrial applications.
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Ultraviolet System Design   Water Quality Products May 2001   Adam Donnellan
In the last issue, we reviewed ultraviolet (UV) disinfection as a suitable technology for treating biologically unsafe water supplies. In this article, we will focus on system design and understanding the many available options for residential and commercial applications.
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Oxidizing Arsenic III to Arsenic V for Better Removal   Water Quality Products March 2001   Dr. Dennis Clifford and Ganesh Ghurye, University of Houston
On June 22, 2000, the U.S. Environmental Protection Agency (EPA) proposed lowering the maximum contaminant level (MCL) for arsenic from 50 down to 5 micrograms/L (Federal Register, 2000).
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Basic Essentials   Water Quality Products January 2001   Adam Donnellan, Sunlight Systems
The benefits of ultraviolet (UV) light in destroying waterborne diseases are well established. This article (part one in a continuing series) will focus on explaining the basic terminology associated with the technology.
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Choosing the Right Disinfection Technology for a Municipal Drinking Water Plant - Part 2   Water Engineering & Management January 2001   Dr. Hubert Fleming and Wayne Huebner
These profiles of various disinfection processes can help managers decide which process is best suited for their treatment plant.
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Comparison of Ultraviolet Pilot Trial with Full-Scale Operation   Water Engineering & Management January 2001   Ken Hartz, Ph.D., P.E. and Jeff Griffith
This article offers a method for comparing the results of a UV pilot system with a full-scale UV system.
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Ultraviolet Disinfection of Pathogens in Drinking Water: Inactivating Genetic Material in Path ogenic Protozoa, Bacteria and Viruses   Water Quality Products November 2000   Gail Sakamoto
The groundbreaking research since 1998, by various groups in North America has shown that very low doses of ultraviolet (UV) light inactivate Giardia cysts and Cryptosporidium oocysts.

Choosing the Right Disinfection Technology for a Municipal Drinking Water Plant - Part 1   Water Engineering & Management November 2000   Dr. Hubert Fleming and Wayne Huebner
Managers of water treatment plants must be able to choose the right disinfection system to bring their plants into compliance with government regulations.

A New Look at Disinfection By-Products in Drinking Water   Water Engineering & Management January 2000   Taha F. Marhaba, Ph.D., P.E.

Ultraviolet Technology: The Non-Chemical Alternative for Well Water Disinfection   Water Quality Products December 1999   Scott Russell
As consumer awareness grows in regard to the quality of water consumed every day from the numerous well water systems across America, the process that is gaining the most attention is that of disinfection.

Georgia Golf Course Greens Up With Ultraviolet Disinfection   Water & Wastes Digest October 1999
The process of reusing wastewater for sprinkling at the Sugar Hill Golf Course in Gwinnett County, Georgia, was time consuming, costly and problematic. An in-line ultraviolet disinfection unit installed at the treatment plant solved the problem.

UV Disinfection 101   Water Quality Products May 1999   by Edwin L. Roberts
An overview of UV disinfection and its applications.

UV Disinfection Q&A   Water Quality Products May 1999   by Robert Voitle
Some common UV-realted questions are answered by UV Expert Bob Voitle.

Alternative Disinfection Technologies for Small Drinking Water Systems   Water Quality Products March 1999
An overview of an American Water Works Association Research Foundation project.

Strategies for Minimizing Ozonation By-Products in Drinking Water   Water Engineering & Management February 1999   Thomas Grosvenor
This paper summarizes ozonation and by-product formation chemistry as well as ways to control by-product formation.

Standards Development Consensus Process for Alternative Water Treatment Device Systems   Water Quality Products June 1998   Nancy J. Culotta
An article announcing NSF International's letter survey to manufacturers of Alternative Water Treatment Devices (AWTDs).

Making the Third-Party Certification Choice   Water Quality Products July 1997   by Nancy Culotta
Manufacturers' claims have become more sophisticated as the industry branches into two diverse segments: water conditioning and health effects claims. Within both segments, opinions have developed that claims made by manufacturers should be truthful and not misleading--resulting in a need to have products independently tested to verify water treatment claims made and promoted in the field.

Cryptosporidium and Giardia Inactivation Device   Water Quality Products October 1996   G. Michael Furst, Jr.
A new water disinfection system has been developed to inactivate Cryptosporidium oocysts and Giardia cysts in drinking water. The technology, known as the CID, inactivates these pathogenic waterborne microorganisms using enhanced ultraviolet (UV) irradiation technology without filtrate disposal, chemical addition or related hazardous by-products.

Drinking Water Treatment Unit Certification   Water Quality Products April 1996   Nancy Culotta
You are familiar with the water quality problems in your area, but finding a line of equipment that you can have faith in, that is reliable and consistently performs as claimed, may not be as easy as it first appears

Are You Putting Your Customers at Risk?   Water Quality Products February 1996   Steven L. Richards
Being knowledgable about various technologies as well as honest and thorough when assessing and/or installing systems will benefit you in the long run

Installing Advanced Disinfection Hardware Achieves Plant Upgrade   Water Engineering & Management March 1995
A case study describes a full-scale UV disinfection system.