Ultraviolet for Disinfection

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.

Deck: 

The science, selection and applications

About The Author: 

Tom Schaefer is the national sales manager at Aquionics, Erlanger, Ky., a manufacturer of ultraviolet technology for disinfection, deozonation, dechlorination and total organic carbon removal. He can be reached at toms@aquionics.com or 800-925-0440 ext. 118.

Activation Date: 
March 27, 2002
Issue Reference: 
Legacy
Legacy ID: 
13031

New Test Technique Measures Light to Gauge Toxicity

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?

Deck: 

System developed for UK military now available to water companies in America

Activation Date: 
June 16, 2002
Legacy
Legacy ID: 
12885

Bioterrorism May Pose Threat to Water Supplies

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.

Deck: 

Can POU/POE technology aid the war on bioterrorism?

About The Author: 

Wendi Hope King is the editor of Water Quality Products and may be reached at wqpeditor@sgcmail.com. Linda Chaloux is an environmental industry analyst for Frost & Sullivan and is focused on water and wastewater applications, specifically on water recycling. She has authored 125 technical articles in 30 publications, completed two industry reports and published a field testing method for Hexavalent Chromium (VI).

Activation Date: 
December 4, 2001
Issue Reference: 
Legacy
Legacy ID: 
12809

Water and Air UV Treatment

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.

Deck: 

Successful Ultraviolet for Commercial Applications

About The Author: 

Bak Srikanth is manager of applications and project proposals at Aquafine Corp. He has been with Aquafine since 1994, where he previously was senior applications engineer. He manages all applications engineering, process R&D and capital project proposal functions. He has several years of work experience in the water treatment and purification industry. He may be reached at 800-423-3015, ext. 651; Bak@AquafineUV.com.
David Witham is vice president of new technology at UltraViolet Devices, Inc. where he has been since 1996. Previously, he was director of engineering. He is responsible for developing UV technology, intellectual property and new business opportunities. Witham has spent a large portion of the last three years in developing the application of UV in indoor air as well as special water applications and the development of modeling and software to assist in UV dosing and system design. He may be reached at 661-295-8140; davew@uvdi.com.

Activation Date: 
November 9, 2001
Files: 
Issue Reference: 
Legacy
Legacy ID: 
12760

Reclaim Greenhouse Water

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.

Deck: 

Copper Ionization, Ozone Provide Effective Pythium Treatment

About The Author: 

Jeff Roseman is a CWS-I with the Water Quality Association. He is the owner of Aqua Ion Plus+ Technologies and has designed and developed ionization and ozone systems for use in the greenhouse and agriculture industries. With a background in chemistry and physics from studies at Purdue University in electrical engineering, he is poised and ready to help the industry find methods to control pathogens and disease. For more information he can be reached at jeff@aquaionplus.com. More information is available at www.aquaionplus.com.

Activation Date: 
October 12, 2001
Legacy
Legacy ID: 
12699

Ultraviolet

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.

Deck: 

Unraveling Local Regulations

About The Author: 

Adam Donnellan is vice president of sales for Sunlight Systems. He represents the third generation of his family to be involved with UV water disinfection. He can be reached at adam@sunlightsystems.com

Activation Date: 
July 30, 2001
Files: 
Issue Reference: 
Legacy
Legacy ID: 
12467

Commercial, Industrial Ultraviolet Systems

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.

Deck: 

Available technologies and their use in C&I applications

About The Author: 

Adam Donnellan is vice president of sales for Sunlight Systems. He represents the third generation of his family to be involved with UV water disinfection. He can be reached at adam@sunlightsystems.com.

Activation Date: 
June 11, 2001
Files: 
Legacy
Legacy ID: 
12395

Ultraviolet System Design

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.

Deck: 

Understanding Residential and Commerical UV

About The Author: 

Adam Donnellan is vice president of sales for Sunlight Systems. He represents the third generation of his family to be involved with UV water disinfection. He can be reached at adam@sunlightsystems.com

Activation Date: 
May 10, 2001
Files: 
Issue Reference: 
Legacy
Legacy ID: 
12355

Basic Essentials

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.

Deck: 

Understanding Ultraviolet Terminology

About The Author: 

Adam Donnellan is vice president of sales for Sunlight Systems. He represents the third generation of his family to be involved with UV water disinfection. He can be reached at adam@sunlightsystems.com

Activation Date: 
May 9, 2001
Legacy
Legacy ID: 
12346

Oxidizing Arsenic III to Arsenic V for Better Removal

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).

About The Author: 

Dr. Dennis Clifford, P.E., is a professor of environmental engineering and chair of the Department of Civil and Environmental Engineering at the University of Houston. He has more than 30 years experience in teaching, research and consulting related to water and soil treatment. During the last 20 years, he and his students have extensively researched the subject of arsenic speciation, oxidation and treatment.

Ganesh Ghurye received his master’s degree in environmental engineering from the University of Houston, where he currently is a researcher in the area of water treatment. He has five years experience in developing arsenic treatment methods.

Activation Date: 
March 14, 2001
Files: 
Issue Reference: 
Legacy
Legacy ID: 
12210