Brominated Resins   Water Quality Products July 2003   Ken Korslin, CWS-III, Pentair Water Treatment, Plymouth Products Division
In 1957 The Dow Chemical Corp. addressed the negatives of using bromine by creating a brominated ion exchange resin, which opened up the use of bromine in offshore water treatment applications.2 Today, polybromide resin is used in many offshore water treatment systems. The fact that bromine can be added to water that previously has been chlorinated makes polybromide resin a practical solution to accommodate the multiple sources of water in offshore applications.
PDF Version

Advanced Surface Water Treatment Plant's Enhanced Coagulation Treatment Process Requires Tough Protective Coatings   Water Engineering & Management May 2003   Lake H. Barrett, Jr.
Lake H. Barrett, Jr., is the director of water and wastewater operations at Tnemec in Kansas City, Mo. He holds a Bachelor's degree from Penn State University and is pursuing a Master's degree in management. He is an active member of SSAC, NACE, ASME, AWWA and WEF.
PDF Version

Assessing Leakage in Water Supply Networks Using Flowmeters   Water Engineering & Management March 2003   Richard Furness, PhD., CEng. and ISA Fellow
Flowmeter usage is diverse and central to the entire water cycle control within the industry. The metering process directly or indirectly influences resource management, process control, new works planning, distribution management, leakage detection, financial control and environmental issues.
PDF Version

Arsenic Treatment Options for the Southwest   Water Quality Products February 2003   Arizona Water Quality Association
While high concentrations of arsenic are found mostly in the Western region of the United States, parts of the Midwest and New England show levels of arsenic that exceed the newly approved U.S. Environmental Protection Agency (EPA) standard of 10 parts per billion (ppb). Individuals not willing to wait for their water system's compliance with the arsenic standard currently are looking for treatment systems to use in their homes. POU and even point-of-entry (POE) treatment systems are an attractive solution for these individuals. The process should begin with a basic understanding of arsenic contamination and the element's chemistry, a complete water quality analysis of the application-specific water and the knowledge of available technologies.
PDF Version

The Challenges of Stormwater Management   Water Engineering & Management November 2002   Bryan A. Coppes
Stormwater management and its role in the larger challenge of preservation of water quality around the world is an evolving issue. As commercial development continues at record levels, both the quantity of runoff and water quality are issues that need to be looked at carefully. The engineering community is being pushed to design new solutions that keep groundwater and surface water ecology safe and that also protect development economics.
PDF Version

Sprawling Out   Water Engineering & Management October 2002   Bill Swichtenberg
A report released by American Rivers, the Natural Resources Defense Council and Smart Growth America, reports that paved over land is sending billions of gallons of water into streams and rivers as polluted runoff, rather than into the soil to replenish groundwater. "Paving the Way to Water Shortages: How Sprawl Aggravates Drought" investigated what happens to water supplies when natural areas are replaced by roads, parking lots and buildings.
PDF Version

Impact of Mixing Chlorine and Chlorine Dioxide on Total Trihalomethane Formation - Part 2   Water Engineering & Management September 2002   Douglas Rittmann, Ph.D., P.E.
Part 1 described the search for more potent disinfection technologies and began the discussion of the laboratory studies.
PDF Version

Stormwater Retrofitting to Protect Drinking Water Reservoirs from the Impacts of Urban Runoff - Part 1   Water Engineering & Management June 2002   James D. Benson, AICP, CPESC, and Melissa Beristain, CPESC
This paper summarizes the stormwater management element of the program and its control of the two key pollutants regulated by the SWTR: fecal coliform bacteria and turbidity that are conveyed to the reservoir by stormwater.
PDF Version

Arsenic in Drinking Water - Part 4   Water Engineering & Management June 2002   John T. O’Connor, EngD, P.E.
Editor’s Note: Part 1 of this series provided a timeline for the development of a drinking water standard for arsenic. It also summarized the political and public reactions to the U.S. EPA decision to delay and withdraw the arsenic rule. Part 2 dealt with human exposure and advances in knowledge concerning human health effects of exposure to arsenic. Part 3 summarized early data on the occurrence of arsenic in U.S. waters.
PDF Version

Increased Treatment Security, Process Optimization Through Improved Monitoring Techniques   Water & Wastes Digest May 2002   Robert L. Bryant
Recent implementation of the Long Term 1 Enhanced Surface Water Treatment Rule (LT1ESWTR) has increased potable water sampling and analysis requirements for an additional 11,000 treatment plants serving more than 18 million Americans.

Meeting the Challenge: Revitalizing the Las Vegas Wash   Water Engineering & Management October 2001
In response to growing concerns over water quality issues in the Wash, a committee has developed a comprehensive adaptive management plan to save this primary outlet for water flows.
PDF Version

Onsite Wastewater Treatment: A Technological and Management Revolution - Part 2   Water Engineering & Management October 2001   Stephen P. Dix, P.E.
With the ability to design systems that include the option of reuse for irrigation or stormwater drainage, onsite management will be poised to provide total water management that protects the environment for the future.
PDF Version

Reverse Osmosis Membranes Help Conserve Water At the Sydney 2000 Olympic Games   Water & Wastes Digest March 2001   WWD Staff
During the 2000 Olympic Games, U.S. Filter Australia/Vivendi Water supplied a wastewater reclamation plant that recycled sewage and rainwater runoff at the games site. Part of the purification process involved the use of reverse osmosis (RO) technology.
PDF Version

City of Hollywood Revises Industrial Pretreatment   Water Engineering & Management July 2000   Frederick Bloetscher, P.E., Lisa Meday-Futo, Whitifeld R. Van Cott and Robert Fergan, P.E.
The City of Hollywood (Fla.) is located in southeast Broward County, with a land area of approximately 29 square miles. However, the City is a regional wastewater service provider to areas outside the City that are termed "Large Users."

Sewer Infrastructure Management: New Concepts and Tools for Your Collector System   Water Engineering & Management February 1998   Thomas J. Day
This article details the new automation systems that are being designed for sewer system monitoring and managing.