UVC Lights Enhance Air Quality
Water & Wastes Digest
December 2007
By Robert Scheir
Indoor air quality problems are solved by an odor control system and UVC lights
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Using UV for dechlorination
Water & Wastes Digest
November 2007
By Jon McClean
UV proves to be an effective dechlorination technique without drawbacks
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Going Multi-Barrier
Water & Wastes Digest
October 2007
By Daniel L. Willers, P.E.
Combining two-stage clarification, media filtration and UV disinfection to improve treatment plant performance
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Emerging Trends in UV Disinfection
Water & Wastes Digest
May 2007
By Jon McClean
Stage is set for dramatic growth in the drinking water market, especially if new technologies can bring increased efficiency and lower cost
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Top Hats Prove Effective
Water & Wastes Digest
November 2005
Andrew Barr, P.E.
Plant maintains production during UV installation with innovative construction tie-in detail
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Trends in Drinking Water Treatment
Water & Wastes Digest
November 2005
By Philip J. Brandhuber, Ph.D.
Needs spur the development of new water treatment technologies that may be more effective, less costly
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A Benchmark UV Drinking Water Facility
Water & Wastes Digest
November 2004
By Jim Cosman
Seattle’s Cedar Treatment facility represents the largest application of UV technology for municipal drinking water in the world
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A Novel Approach Tested in Oregon
Water & Wastes Digest
May 2004
By Rob Baur and Jacques Bourbonnais, Ph.D., P.Eng.
If operators can optimize the use of existing facilities and delay expansion, there could be significant capital savings.
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On the Contrary
Water & Wastes Digest
November 2003
Keith Bircher and Walter Tramposch, Ph.D.
Since 1993, increased and more stringent water treatment rules by the U.S. EPA have intensified the need for a comprehensive, cost-effective solution to treat Cryptosporidium, Giardia and other waterborne pathogens in drinking water. The solution was not chlorine.
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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.
PDF Version
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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.
PDF Version
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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.
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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.
PDF Version
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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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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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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.
PDF Version
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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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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.
PDF Version
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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.
PDF Version
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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.
PDF Version
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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.
PDF Version
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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.
PDF Version
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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.
PDF Version
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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.
PDF Version
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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).
PDF Version
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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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