Making the Most of Modular Pumps

In order to ensure municipal water demands were met, the city of El Dorado, Arkansas contracted with Tanner Engineering & Carter-Burgess to design five new deep wells, water transmission mains, ground storage tanks, pump station, and chlorination facilities. In order to complete the project before the sultry days of summer, the municipality and engineering firm decided to save time and energy by installing a modular pumping system.

Activation Date: 
August 7, 2002
Legacy
Legacy ID: 
13259

Impact of Mixing Chlorine and Chlorine Dioxide on Total Trihalomethane Formation - Part 1

Two rules in 1986 amendments to the Safe Drinking Water Act are challenging many water utilities to meet stricter water quality requirements. The Surface Water Treatment Rule (SWTR)2 and the Disinfection?Disinfection By-Products (D-DBP) Rule3, are requiring utilities to implement more advanced technologies in water treatment. The Surface Water Treatment Rule emphasizes the need for utilities to meet minimum levels of disinfection for surface waters, whereas the Disinfection/Disinfection By-Products Rule limits the disinfectant byproducts. Therefore, utilities will have to implement a treatment approach that balances the benefits of disinfection against disinfection byproducts.

About The Author: 

Douglas Rittmann, Ph.D., P.E., is a water/wastewater consultant and a lecturer at the University of Texas at El Paso Civil Engineering Department. He was previously the division manager for the El Paso Water Utilities.

Anthony Tarquin, Ph.D., P.E., is a professor in the Department of Civil Engineering at the University of Texas at El Paso.

Activation Date: 
August 5, 2002
Files: 
Legacy
Legacy ID: 
13244

Measuring Ammonia with Online Analyzers

Treatment facilities use online ammonia analyzers to monitor and control treatment processes. Controlling ammonia levels can make treatment processes more reliable and cost effective. Currently, there are three major types of online ammonia analyzer technologies available to measure ammonia concentration in a treatment process stream.

Deck: 

Equipment Selection

About The Author: 

Tony Palmer is the executive director for the Instrumentation Testing Association, Henderson, Nev. For more information about ITA and its testing contact, 702-568-1445.
Maureen Ross, P.E., is involved with technical programs for the Instrumentation Testing Association.
Stephen G. Nutt, P.E., is a partner with XCG Consultants Ltd., headquartered in Cincinnati, Ohio.

Activation Date: 
July 2, 2002
Legacy
Legacy ID: 
13200

River Contaminates Town’s Water Supply When State Leaves It to Beavers

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.

Deck: 

Ultraviolet Disinfection

Activation Date: 
July 2, 2002
Legacy
Legacy ID: 
13199

The Practical Use of Ozone for the Well Water Application

We'll discuss the well ozone water treatment application. Each application is a potential business in itself, which means greater revenue and profit. All that is necessary from you is the motivation to boldly go where you have not gone before.

About The Author: 

Roger Nathanson is president of Ozone Pure Water, Inc., Sarasota, Fla. Ozone Pure Water has been a full service ozone/water treatment supplier since 1980. Nathanson heads the system design, system allocation and R&D departments. His background includes mechanical engineering, plumbing/pipe fitting, swimming pool remodeling/repair, sales and marketing. He holds a U.S. patent on a proprietary ozone unit/ozone generator design. Nathanson can be contacted at 800-633-8469 or 941-923-8528; fax 941-923-8231; [email protected]; www.ozonepurewater.com.

Publication Date: 
June 26, 2002
Activation Date: 
June 26, 2002
Issue Reference: 
Legacy
Legacy ID: 
13173

Ultraviolet Dechlorination Technology

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.

Deck: 

Reverse Osmosis Membranes Maintenance Costs Reduced

About The Author: 

Aquionics offers more than 20 years experience in the manufacture, application and development of UV equipment for progressive, nonchemical disinfection and contamination control. For more information, call 800-925-0440; www.aquionics.com.

Activation Date: 
June 26, 2002
Issue Reference: 
Legacy
Legacy ID: 
13172

Developments in Ozone Technology

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.

Deck: 

Small Systems Adopt Ozone Technology to Protect Against Cryptosporidium, Giardia

About The Author: 

Rip G. Rice, Ph.D., is the owner of RICE International Consulting Enterprises in Ashton, Md. He is the author of many papers regarding ozone and ultraviolet technologies, as well as a speaker on the subjects.

Activation Date: 
June 26, 2002
Issue Reference: 
Legacy
Legacy ID: 
13171

Back to the Basics, Part 3

In this last section of a three-part series, the use of ozone, ionization, distillation and aeration is discussed in a simple fashion to help the beginner rationalize the importance for a full understanding of these technologies and the need, again, for a professional water treatment specialist.

This is the final article in a three-part series discussing water chemistry and technology basics.

Deck: 

Brushing up on water treatment 101, part 3

About The Author: 

Jeff Roseman is a Certified Water Specialist–I with the Water Quality Association. He has a vast knowledge of chemistry and physics from studies in electrical engineering at Purdue University and has helped develop a UV light air purifier and ionization controller. Roseman is a master distributor of Ethylene Control, Inc., and distributes Hanna Instrument, Pura and Hydrotechnology Filtration Systems and Pro-Zone International Ozone Products. He is the owner of Aqua Ion Plus+ Technologies and can be e-mailed at [email protected]; 219-362-7279; www.aquaionplus.com.

Publication Date: 
June 26, 2002
Activation Date: 
June 26, 2002
Issue Reference: 
Legacy
Legacy ID: 
13170

Automated Chlorine Control Brings Precision to Water Reclamation Operation

Using reclaimed water for non-potable purposes as a means of conserving potable water supplies is the most prevalent method of water reuse in the United States today. One of the significant challenges for water reclamation facilities is to keep up with the demands for safe, compliant chlorine (Cl2) treatment. One utility that is effectively meeting this challenge is Southern California’s Otay Water District.

About The Author: 

Steve Kobler is the water disinfection technician for the Otay Water District, Otay, Calif.

Activation Date: 
May 6, 2002
Legacy
Legacy ID: 
13089

Advanced Technology Brings the Power to Chlorine Dioxide

Chlorine dioxide is an extremely effective and powerful biocide that has been used for many years as a bleaching agent and slimicide in the pulp and paper industry, as a disinfectant in municipal water treatment and in many other industrial water treatment operations. However, significant capital and operating costs have limited the use of chlorine dioxide to large-scale applications. New technology now makes it practical to use the biocide in a wider range of water treatment applications.

About The Author: 

Michael Cochran is the business development manager for the Aseptrol technology at Engelhard Corp., a material science and surface chemistry company based in Iselin, N.J.

Activation Date: 
April 25, 2002
Issue Reference: 
Legacy
Legacy ID: 
13070
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