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

Cryptosporidium - A brief overview of a new technology

The occurrence of Cryptosporidium parvum and other pathogens in water supplies poses a dangerous problem to the water industry and human health. Read about a new technology that is helping rid of this problem.

About The Author: 

Danielle Duclos is a technical writer at Foresight Science & Technology, a firm specializing in bringing people and technology together. The company’s customers range from major corporations and the U.S. government to small firms. Foresight Science & Technology, New Bedford, Mass., is a contractor for EPA, DoD and several other federal agencies tasked with assessing the utility of this new technology work. Foresight maintains an active federally and in-house sponsored research and development program. Additional information can be obtained at www.seeport.com; 508-984-0018, ext. 13.

Activation Date: 
March 14, 2001
Issue Reference: 
Legacy
Legacy ID: 
12204

Water Quality Deterioration in Distribution Systems

While temperature is acknowledged to be an important factor in water treatment, remarkably little study has been made of the adverse influence of low temperatures on physical treatment process effectiveness. An early study concluded that "there is no preventative or retarding effect on alum floc formation with low raw water temperatures."

Deck: 

Part 4: Microbiologically-Mediated Deterioration in Surface Water Supplies

About The Author: 

Thomas L. O’Connor, BSEE, MBA, is the project director for H2O’C Limited, Columbia, Missouri.

John T. O’Connor, EngD, P.E., is the prinicipal for H2O’C, Limited, Columbia, Missouri. Phone: 877-22-WATER; e-mail: water@H2OC.com.

Activation Date: 
February 19, 2001
Legacy
Legacy ID: 
12162

Comparison of Ultraviolet Pilot Trial with Full-Scale Operation

This article offers a method for comparing the results of a UV pilot system with a full-scale UV system.

Deck: 

Disinfection Systems

About The Author: 

Ken Hartz, Ph.D., P.E., is an engineer with URS Greiner Woodward Clyde, Seattle, Wash.
 
Jeff Griffith works for the Midway Sewer District, Kent, Wash.

Activation Date: 
January 17, 2001
Files: 
Legacy
Legacy ID: 
11979

Choosing the Right Disinfection Technology for a Municipal Drinking Water Plant - Part 2

These profiles of various disinfection processes can help managers decide which process is best suited for their treatment plant.

Deck: 

Water Treatment

About The Author: 

Dr. Hubert Fleming is vice president of water purification solutions, Severn Trent Services, Inc., Fort Washington, Pa.

Wayne Huebner is general manager of Capital Controls Group, Severn Trent Services, Inc., Colmar, Pa. With headquarters outside Philadelphia, Pa., Severn Trent Services, Inc. is a provider of water purification products, laboratory and operating services and information technology solutions.

Activation Date: 
January 16, 2001
Files: 
Legacy
Legacy ID: 
11973

Roundtable Discussion: E. coli (Escherichia coli)

Escherichia coli, a.k.a. E. coli. A terrible, but familiar word to the public suggests sewage or animal waste contamination. E.

Deck: 

Recent outbreaks of E. coli have brought consumer’s attention to their drinking water. Understanding its source, regulations and prevention will be key to combating this waterborne illness

About The Author: 

Wendi Hope King is the editor of Water Quality Products magazine.

Publication Date: 
December 28, 2000
Activation Date: 
December 28, 2000
Issue Reference: 
Legacy
Legacy ID: 
11900

Choosing the Right Disinfection Technology for a Municipal Drinking Water Plant - Part 1

Managers of water treatment plants must be able to choose the right disinfection system to bring their plants into compliance with government regulations.

Deck: 

Regulations

About The Author: 

About the Authors:
Dr Hubert Fleming is vice president of Water Purification Solutions, Severn Trent Services, Inc., Fort Washington, PA.

Wayne Huebner is general manager of Capital Controls Group, Severn Trent Services, Inc., Colmar, PA. With headquarters outside Philadelphia, PA, Severn Trent Services, Inc. is a provider of water purification products, laboratory and operating services and information technology solutions.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11922

An Overview of Ozone in Water, Wastewater Treatment

There are more than 2,000 installations worldwide that use ozone to treat drinking water. Ozone is an effective disinfectant for treating municipal and industrial wastewater, enabling the end user to meet EPA pre-treatment standards.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11894

Well Water Treatment: Ozone Helps Solve Water Problems at Bassi Ranch

An analysis of the raw well water (Table 1) shows a pH of 7.9 and 30 color units with >20 mg/L hydrogen sulfide, 5.6 mg/L iron and 0.6 mg/L manganese. Odor was detected at 10 threshold odor number (TON), indicative of the high hydrogen sulfide levels. To meet these water problems head-on, the homeowners formed the Bassi Ranch Mutual Water Co. in 1992.

About The Author: 

Ted Rich has been the director of marketing for ClearWater Tech LLC of San Luis Obispo, Calif., since 1992. The company manufacturers a complete line of mid-sized ozone generators for a variety of water treatment applications. For more information, visit the ClearWater Tech website at www.cwtozone.com; 800-262-0203; cwt@cwtozone.com

Activation Date: 
December 28, 2000
Issue Reference: 
Legacy
Legacy ID: 
11830

Membrane Filtration As an Alternative: Part 2

Part one of this article appeared in the July issue and discussed microfiltration and utrafiltration. This article discusses nanofiltration and reverse osmosis.

About The Author: 

Dr. Mohamed Lahlou is the technical assistance specialist for the National Drinking Water Clearinghouse. This article originally appeared as a tech brief for the NDWC.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11813