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.
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Montgomery County Works With EPA To Upgrade Infrastructure   Water & Wastes Digest May 2003
More and more communities face the dual problem of aging infrastructure and overdevelopment due to population growth. Under the Federal Clean Water Act (CWA), EPA is keeping a vigilant eye on the problem. When a community does not meet CWA regulations for sewage overflow, EPA works with that community through long-term loans and expertise to develop a solution. Such is the case in Montgomery County, Ohio.

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.
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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.
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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.
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Integrated Technology Simplifies Dewatering Process at Two Municipal STPs   Water & Wastes Digest February 2003   Robert W. Mau, USFilter
The borough of West Mifflin, Penn., is a community located about nine miles southeast of downtown Pittsburgh. For years, the West Mifflin Sanitary Sewer Municipal Authority (WMSSMA) hauled liquid from its New England STP (a 1.2 mgd plant) to the Thompson Run facility (a 4.5 mgd plant), where it was processed on a belt press for dewatering. However, the hauling and associated labor proved very costly, and it was not always easy to coordinate dewatering schedules for both plants. Additionally in the late 1990s, the WMSSMA faced a requirement to achieve higher cake solids and provide odor control that would respect nearby homes and businesses. Moreover, space constraints and staffing reductions necessitated a simple-to-operate installation.

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.
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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.
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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.
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Impact of Mixing Chlorine and Chlorine Dioxide on Total Trihalomethane Formation - Part 1   Water Engineering & Management August 2002   Douglas Rittmann, Ph.D., P.E., and Anthony Tarquin, Ph.D., P.E.
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.
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Stormwater Retrofitting to Protect Drinking Water Reservoirs from the Impacts of Urban Runoff - Part 2   Water Engineering & Management July 2002   James D. Benson, AICP, and Melissa Beristain
The Kensico Reservoir Stormwater Management Program is designed to reduce fecal coliform bacteria and turbidity delivered to the reservoir by controlling and treating stormwater. The first phases of the project, assessment of the watershed, site selection and the screening and design of stormwater control and treatment facilities, were completed in July 1998. Facility construction began in the spring of 1999 and completed early in 2001. DEP has committed to monitoring and evaluating facility performance and maintaining the facilities.
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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.
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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.
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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.

Effects of Recharge of Chlorinated State Water Project Waters to Groundwaters in Lancaster Area of California   Water Engineering & Management April 2002   Hisam A. Baqai, P.E., G.E.
As the population in Southern California increases, more and more demands are being put on the state’s groundwater resources, further exacerbating the overdraft problem. Many communities in Southern California are recharging their aquifers with imported surface waters to combat this problem. The major recharge normally is carried out during wet weather periods when surface water is plentiful. However, recharging these groundwater aquifers with imported surface water can create the potential for water quality degradation. The problem can start when surface water is disinfected with chlorine to prevent biofouling and remove pathogens.
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Practical Engineering Combined with Sound Operations Optimizes Phosphorus Removal   Water Engineering & Management April 2002   Daniel Bolduc and James Fitch, P.E.
Built in the early 1970s, The Oakland, Maine, Wastewater Treatment Facility (WWTF) treats and discharges approximately 300,000 gallons per day (gpd) of wastewater to the Messalonskee Stream. The facility was designed as a conventional activated sludge secondary treatment system to be used principally for BOD and TSS removals. The secondary effluent enters the Messalonskee Stream upstream of several impoundments. This practice has resulted in a steady decline in the water quality of the stream as evidenced by increased algae blooms and other signs of euthophication in impoundments located downstream of the discharge.
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Advanced Treatment for Groundwater: Treating Low-Quality Groundwater for Municipal Use   Water Engineering & Management November 2001   By Ralph Gelvin, P.E., and Don Novak, P.E.
Groundwater sources that can be used for drinking water purposes are requiring increasing degrees of treatment to meet the requirements of both the regulating agencies and the consumer.
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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.
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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.
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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.
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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.