Turbo-Filtration
Water & Wastes Digest
July 2008
By Chris Shuster
A custom Type 316 stainless steel manifolding fabricated by Miller-Leaman to accommodate future expansion of the Turbo-Disc Filter system; used for demonstration and water testing purposes.
PDF Version
Turning to Filtration
Water & Wastes Digest
December 2007
ITT/F.B. Leopold Co.
A deep-bed biofiltration system maintains nitrate/nitrogen compliance despite rapid service expansion
PDF Version
Exploiting Surface Water Resources
Water & Wastes Digest
November 2007
By Evelyn M. Scibelli
Membrane ultrafiltration technology helps a Texas town get more from its unique aquifer
Retro Fit a Hit
Water & Wastes Digest
October 2007
By Hui Lin, P.E.
The sand filter basins at an Illinois treatment plant gained capacity from a cloth media filter retrofit
Going Multi-Barrier
Water & Wastes Digest
October 2007
By Daniel L. Willers, P.E.
Combining two-stage clarification, media filtration and UV disinfection to improve treatment plant performance
Recycling & Reusing
Water & Wastes Digest
September 2007
By Paul Schuler
The U.S. Army and Aqua Engineers team up to establish an award-winning wastewater reuse system on a Hawaiian Army base
PDF Version
Diamond in the Rough
Water & Wastes Digest
October 2006
By Keith Dayton
Cloth media filter retrofit solves hydraulic loading problem
How Long Can You Go?
Water & Wastes Digest
October 2006
By Mario Benisch, Dave Clark, April Z. Gu & JB Neethling
Recently, there has been increasing demand to achieve very low effluent total phosphorus (TP) due to more stringent discharge limits imposed on wastewater treatment plants.
Trends in Drinking Water Treatment
Water & Wastes Digest
November 2005
By Philip J. Brandhuber, Ph.D.
Needs spur the development of new water treatment technologies that may be more effective, less costly
Adapting to Arsenic Rules
Water & Wastes Digest
August 2005
By Wendy L. Chambers and Roman J. Aguirre
The proposal consisted of supplying more than 300 tons of GFH adsorption media and 35 large diameter pressure vessels, including instrumentation and controls as well as backwash storage tanks.
Reservoir Tank Is One of A Kind
Water & Wastes Digest
May 2005
By Judy Horning
This expansion project is part of a long-term citywide capital improvement program to improve the infrastructure and services that provide San Diegans with safe drinking water.
Time Saved Testing Pays Off
Water & Wastes Digest
May 2005
By Adam Potter
Many wastewater plants are switching from fecal coliforms to monitoring for E. coli and Enterococcus, because the EPA has identified these bacteria as the best indicators of fecal contamination in water.
Filtration
Water Quality Products
March 2005
Scale… it is a vicious never-ending problem that can kill the overall efficiency of water-cooling systems or towers. It can also clog sand-type filtering systems and turn the sand to cement, eventually shutting it down altogether.
PDF Version
Sand Plays Prominent Role at Canadian Ski Lodge
Water & Wastes Digest
March 2005
By Dennis Hallahan, P.E.
These traditional technologies, often upgraded with new design and technology, provide quality treatment and disposal without the capital cost of sewering and centralized treatment plants.
Using Baseline Monitoring Techniques to Assess Filter Run Performance
WWDmag.com
January-December 2005
Michael J. Sadar and Kathleen Bill
Determining if a filter run is approaching a breakthrough condition is a daily challenge for water treatment plant (WTP) operators. Current techniques look for upward trends in either turbidity or particle counts of the filter effluent. However, this does not consistently predict actual filter breakthrough. This study’s objective is to determine if data from different particle detection technologies can be better utilized to characterize filter performance.
PDF Version
The Application of Simplified Process Statistical Variance Techniques to Enhance the Detection of Filtration Integrity Loss
WWDmag.com
January-December 2005
Mike Sadar
Process monitoring for loss of filtration integrity is often performed using basic light scatter detection methods such as turbidity and particle counting. These methods monitor for the presence of particles in the filtration effluent (permeate). The industries where these parameters are most widely used include drinking water and ultra-pure water production. The recent upward trend in the application of membrane systems for drinking water production enhances the need for technologies with higher sensitivity and greater reliability because the loss of filtration integrity could directly impact human health.
PDF Version
Tapping into the Ocean
Water & Wastes Digest
January 2005
By Nikolay Voutchkov
The mineral/salt content of the water is usually measured by the water quality parameter total dissolved solids (TDS), in milligrams per liter (mg/L) or parts per thousand (ppt).
A Permanent Element
Water & Wastes Digest
November 2004
A. R. Rubin
Reuse has been a common practice for generations. Only recently has it received the attention necessary to sustain it as an element of the onsite and decentralized wastewater industry
RO Can Make Sense
Water & Wastes Digest
November 2004
By Michael Norton, Birol Shaha and Dr. YuJung Chang
Pristine water
is being used to
irrigate golf courses. One choice may be
to learn to use reclaimed water
to do this job.
The First Seven Years of Operation at an Ultrafiltration Plant
Water & Wastes Digest
October 2004
By James J. Vecchio and Antonia von Gottberg
Many membrane filtration plants for municipal applications have been installed over the last few years, but few plants have been in operation for seven years, and even fewer use the original membranes
Keeping Up With the Times
Water & Wastes Digest
October 2004
By Tim Gregorski
WWD examines some of North America’s the latest municipal upgrades.
Wastewater Treatment for Unserviced Land Development
Water & Wastes Digest
October 2004
By James Hotchkies
Residential, industrial, or recreational construction on non-sewered land frequently raises many questions about the most reliable and cost-effective strategy for managing the future wastewater stream.
After All These Years
Water & Wastes Digest
October 2004
By Ron Singleton
The Water District researched the many choices of filtration technologies available and eventually sent requests for proposals to six different manufacturers.
A Combination Deal
Water & Wastes Digest
October 2004
Fountain Hills combines cloth media filtration and membrane system to get quality effluent
The Technology of Choice
Water & Wastes Digest
October 2004
By Tim Gregorski
Membrane-related technology can offer near-complete treatment
to a variety of water applications.
The Evolution of Low-Pressure, Immersed Membrane Technology
Membrane Technology
October 2004
by T. David Chinn, P.E.
Today, after nearly 25 years of championing the innovation and evolution of low-pressure, immersed membrane technology, ZENON continues to be a leader in this rapidly growing and dynamic market.
Addressing Membrane FAQs
Membrane Technology
October 2004
by Karen Decampli
With this growth and discovery stems questions about specific uses and maintenance.
Science Applied to Optimize Membrane Treatment
Membrane Technology
October 2004
by Paul Dittman
CWS hired Black & Veatch (B&V) to evaluate a treatment system to process 20 MGD of water from the Kern River for the city of Bakersfield. B&V selected a treatment system that uses coagulation and sedimentation with ferric chloride as coagulant.
UF Pretreatment for RO Systems
Membrane Technology
October 2004
By John McArdle, Antonia von Gottberg, Ben Antrim and Dawn Halpern
Because of the increasing awareness of the need for adequate pretreatment, there has been significant interest in UF as pretreatment for RO for municipal applications in brackish and seawater desalination plants.
Providing a One-Two Punch
Water & Wastes Digest
September 2004
Lianna Mah
The Oakville plant treats 109 million liters per day of water from Lake Ontario.
New Desalination Method Reduces Energy Costs
Water & Wastes Digest
August 2004
By Denise Covelli
The Long Beach Seawater Desalination Research and Development Facility will be the nation’s largest, using dual-stage nanofiltration technology up to 30% more energy efficient than conventional methods
DCWW Power, Politics and Paradigm
Water & Wastes Digest
August 2004
By Craig Lindell
However, its real capacity (decentralized wastewater treatment) to address budget challenges, nonpoint pollution and the watershed agenda remains unrealized.
Double Dewatering
Water & Wastes Digest
February 2004
Completion of this project will make the Broward County facility one of the five largest belt filter press dewatering facilities in the U.S.
Filter Provides Legionella Barrier for Hospitals
Water Quality Products
November 2003
Point-of-use units are increasingly gaining acceptance in such applications as hospitals and nursing homes. This technology allows these facilities to produce high-quality water as needed at a lower cost.
PDF Version
Activated Carbon for Bromate Reduction
Water Quality Products
November 2003
Kimberly D. Thompson and Neal E. Megonnell
Various authors have studied the use of activated carbon and for the most part have concluded activated carbon is not a cost-effective solution. However, these authors have failed to realize the limitations of carbon validation methods or the fact that not all carbons are alike, especially when chemical reactions control the process.
PDF Version
Finding a Sweet Result
Water & Wastes Digest
October 2003
David Pearson
A new membrane filtration system manufactured by PCI Membrane Systems, Inc. allowed National Raisin Co. of Fowler, Calif., to not only cut their wastewater costs, but they have also opened up a potentially lucrative source of income.
Old School No Longer
Water & Wastes Digest
October 2003
Thomas C. Schwartz
When the country's oldest private boarding school had to upgrade and modernize its wastewater treatment facility, it employed a new and innovative technology to resolve an administrative consent order (ACO) to bring itself into compliance and avoid the possibility of paying hefty fines.
Talkin About Regeneration
Water & Wastes Digest
October 2003
Tim Gregorski
Studies show that membrane regeneration typically results in a 40% increase in permeate flow, a 38% decrease in differential pressure and a 3% increase in salt rejection. The Bakersfield membrane regeneration facility has the ability to process up to 60 membranes continuously for 24 hours a day, which allows the facility to produce better than average turn-around times.
Filtering Through the Options
Water & Wastes Digest
August 2003
Elaine Floyd
The Watsonville Wastewater Treatment Facility currently pumps 400 gallons per minute through the Tekleen water filter manufactured by Automatic Filters in Los Angeles.
Turnkey Automation Available To Water Works Industry
Water & Wastes Digest
August 2003
David Rizzo
Although the basic components of any filtering system include the filter console, the communications link, the actuators and the instrumentation, it is the turnkey integration of these components into a pre-packaged, pre-engineered and even pre-programmed system that merits its classification as a major step forward.
Farm Animals Need Clean Water, Too
Water Quality Products
July 2003
In 2001, the Minnesota State Fair built the Miracle of Birth Center to reflect modern animal production practices in the existing Children's Barnyard at the fairgrounds. Dechlorinated water was one very important step that could be made to keep the animals comfortable and healthy at the fair.
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NSF Conference Addresses Public Water System Compliance Using POU/POE
Water Quality Products
June 2003
In February, NSF International arranged for many experts to cover the issues and facets of point-of-use and point-of-entry (POU/POE), how they can be used for PWS compliance and other opportunities for the manufacturers and users. This article is intended to provide opinions and a broad conference overview.
PDF Version
Arsenic Treatment
Water Quality Products
June 2003
Ley Hathcock, Ph.D., Rich Cavagnaro & Greg Gilles
A wide range of technologies, some new and some more traditional, is being marketed and applied for arsenic treatment. Each of these technologies has specific properties impacting its suitability for any particular scale of application. While rare, the ability of a single water treatment technology to perform effectively across many treatment platforms is not unique.
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E. Coli
Water Quality Products
May 2003
Danielle Duclos
This article provides a general overview of E. coli and drinking water as well as current and emerging monitoring and decontamination technologies.
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Chesapeake Seals the Deal
Water Engineering & Management
May 2003
Watertight Storm Sewer Group
The City of Chesapeake, Va. is located in the region called Hampton Roads, the 27th largest metro area in the country with more than 1.5 million residents. With an annual rainfall of approximately 48", its designers must contend with the prospects of determining where 294 billion gallons of water will go. A large share of this rainfall will find its way into the storm sewers. Last year, the City Council appropriated an extra $467,600 for contract cave-in repairs. The City of Chesapeake has recognized this problem and is developing a program to address it.
PDF Version
George Warren Fuller, Industry Pioneer
Water Engineering & Management
May 2003
Bill Swichtenberg
The George Warren Fuller Award is presented annually to one member of each section of the American Water Works Association (AWWA). It is based on recommendations from the sections for distinguished service in the water supply field and "in commemoration of the sound engineering skill, the brilliant diplomatic talent and constructive leadership talent" that characterized Fuller's life.
PDF Version
Water Treatment: Thinking Small
Water & Wastes Digest
May 2003
Richard Merwin
As populations grow, as urban, suburban and ex-urban areas expand, demand for water increases and safety standards rise. An effective and creative way to deal with problems of growth and resource management might just be to think small. A case in point is the Olivenhain Municipal Water District's (OMWD) treatment facility in San Diego County, California.
Zero Waste: A Look at the Future of Reverse Osmosis
Water Quality Products
March 2003
Josh Hanford, Watts Industries
Most reverse osmosis systems waste as much as 20 gallons just to produce one gallon of product water. The new technology called "ZeroWaste" eliminates this problem by returning the concentrate water from the reverse osmosis system back to the home's plumbing, resulting in 100 percent efficiency.
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Filtration Fundamentals
Water Quality Products
March 2003
Bill Kavey
Over the years, water quality has noticeably deteriorated worldwide. This decline in water quality stems from the extreme demand on very limited natural resources. Various principles of filtration are used in many applications to improve the general quality of the water that is being treated. Along with screen filters, coagulation/filtration, neutralizing filters, oxidizing filters, clairifying filters and carbon filters are other treatment methods that may be used.
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Greensand Process Removes Iron, Manganese, Arsenic from Groundwater
Water & Wastes Digest
March 2003
Manganese greensand is a specially processed medium for iron, manganese, and hydrogen sulphide removal. This premium non-proprietary filter medium is processed from glauconitic greensand on which a shiny, hard finite thickness manganese oxide coating is formed and is firmly attached on every grain by a controlled process.
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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Point-of-Use Reverse Osmosis
Water Quality Products
February 2003
Tony Pagliaro
As the residential point-of-use (POU) reverse osmosis (RO) industry approaches its 35th anniversary, it is time for a reality check on the industry's progress to date as well as a look ahead to new technologies or improvements that the industry may introduce for POU RO systems in 2003.
PDF Version
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.
Reverse Osmosis - Anion-Filtration Water Plant Run by a Single Automation Platform with Fieldbus Communications
Water Engineering & Management
January 2003
Robert Oreskovich, John Contestable, Ken Flatt, Ian C. Watson, P.E., and John Rifleman
A new 3.0 mgd water treatment plant on North Carolina's Cape Hatteras is believed to be the first in the United States to apply Foundation fieldbus for device-level control communications. The plant, built by the Dare County Water Department near the famous Cape Hatteras Lighthouse, has been operating without a problem since startup more than two years ago. Fieldbus has been widely applied in all process industries including electric power generation, an industry also cautious to adapt new technology.
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A New Option in Valve Actuators Strengthens Control of Filtering Operations
Water Engineering & Management
January 2003
Water works engineers are now turning to a new generation of pneumatic valve actuators that are capable of executing the instructions of electronic control systems with the necessary precision to accurately control effluent flow. Surprisingly simple but rugged in construction, this new breed of actuators also is meeting the need to reduce downtime, as some of the first ones to debut in 1981 are still in operation without needing a spare (new) part.
PDF Version
Arsenic Overview Series - Part 1
WaterInfoCenter
January-December 2003
Sherry Odom
Arsenic is a naturally occurring metal found in rocks and soil, which can be released into the environment through geological events such as volcanic activity and erosion. Other releases of arsenic into the environment occur through industrial processes such as production of paints, metals, soaps, dyes, drugs, semi-conductors and wood preservatives, as well as in mining and smelting.
Arsenic Overview Series - Part 2
WaterInfoCenter
January-December 2003
Sherry Odom
Consumers unwilling to drink arsenic contaminated water are demanding a more rapid implementation. Publicly owned utilities, however, will be held hostage from implementing a more rapid solution due to government approval cycles, annual budgets, required biding processes and slow implementation schedules. As a result, in-home treatment systems, which immediately can be installed, are a very popular treatment option for individual homeowners. Other advantages such as low implementation/operating costs and improved flexibility make the POU/POE approach option appealing.
Arsenic Overview Series - Part 3
WaterInfoCenter
January-December 2003
Sherry Odom
In addition to officially sponsored research projects being performed throughout the world (see Section V for more information on research), many universities, government organizations and industry professionals are active in providing solutions to this issue. The following papers have been presented on arsenic treatment, health effects or policy issues at various tradeshows and conferences throughout the United States.
Arsenic Overview Series - Part 5
WaterInfoCenter
January-December 2003
Sherry Odom
Research on arsenic can be broken down into three general areas -- health effects, treatment options and cost evaluations.There are more than 1,000 published research papers on health effects alone. This section provides an over-view of the most prominent research related to these areas which have impacted EPA’s decisions. There also are links to research organizations that can provide access to the specific projects conducted.
Arsenic Overview Series - Part 6
WaterInfoCenter
January-December 2003
Sherry Odom
What research is being done at University's throughout the US? Colleges and universities across the U.S. are continuing their efforts in educating the population on the subject of arsenic. Both public and private universities are contributing their time, money, and expertise in areas of arsenic research such as geochemistry, health effects, and treatment options. Research programs, such as the ones listed below, are just a glimpse of the ongoing studies for arsenic. Ongoing research is necessary in order to continue to develop efficient and cost-effective solutions for the far-reaching problem of arsenic contamination.
Arsenic Overview Series - Part 7
WaterInfoCenter
January-December 2003
Wes McGowan
These terms are pulled from "All About Water: An Illustrated Dictionary of Water Terminology" by Wes McGowan
ETV Testing Verifies Membrane Filtration Plant Treats Surface Water, Meets D/DBP Rule
Water Quality Products
December 2002
PCI Membrane Systems, Inc.
A study published as part of the EPA's Environmental Technology Verification (ETV) Program verifies the performance of a Fyne Process membrane filtration plant tested on high organic-laden surface water in Barrow, Ark. The plant was able to remove significant levels of organics--precursors to disinfection byproducts such as trihalomethanes (THM) and haloacetic acids (HAA)--producing water that easily met the disinfection byproduct standards set by the EPA's stringent Stage 1 D/DBP Rule.
PDF Version
Desalination in America
Water Quality Products
November 2002
John B. Tonner, Water Consultants International
On average there are 50 to 75 significant desalination projects per year in the United States with an average capacity of approximately 1 million gallons per day. The majority of these projects utilize membrane processes such as nanofiltration (NF) or reverse osmosis (RO).
PDF Version
Australian Microfiltration System is World's Largest For Potable Water Treatment
Water & Wastes Digest
November 2002
The AQUA 2000 Project is a build-own-operate-transfer (BOOT)
project, delivered and operated by Vivendi Water Australia. It includes the
construction and operation for 25 years of a water treatment scheme for the
Coliban Water Authority in Victoria, located in southeastern Australia.
Filter Housing Design Fits Height, Seismic Stress Needs
Water & Wastes Digest
November 2002
Occasionally, height is an issue in a filtration system's housing design. A few years ago, Eden Equipment Company of Huntington Beach, Calif., was approached by a client with just this issue. Due to the client's specific requirements for their system, Eden's original ideas and drawings for this horizontal vessel needed to be redesigned. In addition to the height restrictions on their system, they also needed a design that could withstand a Seismic Zone 4 earthquake.
Integrated Technology Simplifies Dewatering Process at Two Municipal STPs
Water & Wastes Digest
October 2002
In the late 1990s, one western Pennsylvania sewage treatment plant (STP) sought to process Class B biosolids on-site, eliminating the expense of hauling liquid off-site and significantly decreasing associated labor costs. At the same time, the plant needed to achieve higher cake solids and provide strict odor control. In addition, the selected equipment also had to be able to greatly enhance process efficiencies at not just the one plant, but its sister facility as well. Fortunately, USFilter offered a fairly simple solution to meet the STP's seemingly complex needs.
Ultraviolet Dechlorination Technology
Water Quality Products
July 2002
Aquionics
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.
PDF Version
The Great Activated Carbon Dilemma
Water Quality Products
July 2002
Neal Megonnell, Calgon Carbon Corp
Drinking water treatment professionals have long held fast to the belief that granular activated carbon (GAC) based on bituminous coal provides the best performance for their demanding application. That’s why, when an article in 1999 cited evidence that a lignite-based GAC outperformed a bituminous-based carbon, industry experts were surprised and more than a bit skeptical.
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Revisiting the Selection of Stainless Steel in Water and Wastewater Treatment Environments: Part 3
Water Engineering & Management
July 2002
Frederick Bloetscher, Richard J. Bullock, Robert E. Fergen, Gerhardt M. Witt, and Gary D. Fries
Based on the City of Hollywood’s experience, the use of 316L stainless steel should be evaluated carefully due to the potential for problems in the erection and construction of water treatment facilities that will be in contact with high chloride water and/or other corrosive chemistries. As with many membrane facilities, much of the stainless steel is exposed (not buried), which subjected it to atmospheric as well as water quality problems. Therefore, unless the quality control of the raw and reject water (chemical, physical and microbial) can be assured, 316L stainless steel may not be the appropriate material for engineers to specify.
PDF Version
Stormwater Treatment: A Look at Various Methods, Hydrodynamic Separators
Water & Wastes Digest
July 2002
Since the passing of the Clean Water Act, the industry has made great strides in improving the quality of point source discharges to the environment. As treatment technologies continue to improve, non-point source pollution becomes a more significant contributor to environmental degradation.
Small Site Dictates Stormwater Treatment Solution in Mich. Redevelopment
Water & Wastes Digest
July 2002
Ann Arbor, a densely populated university town of 180,000, has been seeing an increase in urban redevelopment pressure in recent years as developable land has become scarce and land values have risen. The city of Ann Arbor has worked closely with the County Drain Commissioner’s office to use this redevelopment as an opportunity to improve the quality of stormwater flowing into the county drains.
Evaluating Activated Carbons
Water Quality Products
June 2002
Henry Nowicki, Ph.D., Mick Greenbank, Ph.D. and Homer Yute, M.S., PACS
New
challenges are emerging in the industry that require new methods and product
developments. This article discusses additional test methods for the AC
industry.
PDF Version
Membranes: Fouling & Cleaning
Water Quality Products
May 2002
Bjarne Nicolaisen
Membrane technology offers the possibility of managing total water resources. The spiral wound membrane element configuration is the most widely used due to its high packing density and relatively low price. This article will describe some technological advances in the area of innovative new membranes and application concepts for spiral wound membrane elements.
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Growing Awareness of POU
Water Quality Products
May 2002
Glenn Land and Bill Harrison
The future of safe drinking water lies squarely in the hands of the point-of-use (POU) water purification industry. Growing awareness among decision-makers and consumers is the force behind the increasing importance of the POU industry.
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Using Advanced Adsorptive Media for Arsenic Treatment
Water Engineering & Management
April 2002
Greg Gilles and Jennifer Mathis
On November 26, 2001, the new arsenic standard was signed into law—lowering the acceptable level for the contaminant from 50 parts per billion (ppb) to 10 ppb. Approximately 4,100 municipal water systems serving nearly 13 million people nationwide are affected by the law and are required to meet compliance by January 2006. According to the U.S. Environmental Protection Agency (EPA), 97 percent of these systems are small systems serving fewer than 10,000 people each. The economic impact on these small systems is likely to be large. However, there currently are options available to small municipalities that may be more affordable than central treatment.
PDF Version
Making the Filtration Buying Process Easier for Your Customers
Water Quality Products
March 2002
By David M. Marsh
If you’ve seen it once, you’ve seen it a hundred times—customers who come to you looking for a home filtration system, unaware of what their specific needs are. While many consumers simply want a system that improves their water’s taste and aesthetic qualities, the majority are looking for a product that will make their water healthier. But as you know, “healthier” is a subjective term, and without knowing the issues that are present in the customer’s water, providing them with a system that fits their needs isn’t very easy to do.
Production of High Purity Water From Seawater
Water Quality Products
March 2002
Contributed by Ted Prato, Erik Schoepke, Lance Etchison, Tom O’Brien, Brian Hernon and Kit Perry, I
The Diablo Canyon Power Plant at Avila Beach in California utilizes seawater for both cooling water and makeup water for steam generation. Ionics, Inc., Watertown, Mass., designed and built and now operates a complete water treatment system serving the high-purity water needs of this power plant. Over the past eight years, the seawater treatment section has demonstrated excellent long-term performance as a result of strong design, consistent maintenance and qualified operators.
Project Compares Brackish Water Desalination Technologies – Part 2
Water Engineering & Management
March 2002
Jim Passanisi, Janet Persechino and Todd K. Reynolds
Part one of this article appeared in the February issue and described how nanofiltration, reverse osmosis and electrodialysis reversal are being run side-by-side at the Brackish Water Demonstration Facility in California.
PDF Version
Project Compares Brackish Water Desalination Technologies - Part 1
Water Engineering & Management
February 2002
Jim Passanisi, Janet Persechino and Todd K. Reynolds
In Port Hueneme, California, a state-of-the-art desalination facility uses three brackish water desalination technologies: reverse osmosis (RO), nanofiltration (NF) and electrodialysis reversal (EDR), operated side-by-side to produce over three million gallons per day (mgd) of high quality drinking water. The Brackish Water Reclamation Demonstration Facility (BWRDF) is the cornerstone of the Port Hueneme Water Agency’s (PHWA) Water Quality Improvement Program. In addition to providing desalted water for local use, the BWRDF also serves as a full-scale research and demonstration facility.
PDF Version
Boost POE Sales by Leveraging the New Arsenic Standard
Water Quality Products
February 2002
Craig Winter, CWS-III, EnviroInvestigations &Remediation
Recent market research showed that more than 73 percent of consumers prefer to consult with a water treatment professional when dealing with arsenic. Combining this inclination with the preference for the POE approach, the treatment professional has a unique opportunity to generate significant new revenue from POE sales with minimal upfront effort.
PDF Version
Legionella Management and Monitoring: Part 2
Water Quality Products
February 2002
Paul S. Warden, Kristen S. Fallon, Ph.D., M.S.E.L., & Colin R. Fricker, Ph.D.
Well-designed water distribution and cooling systems,
coupled with sound management and operational procedures, are essential to
control Legionella in industrial facilities—and a monitoring program
should not be considered as a replacement. However, most experts even those
ill-disposed towards routine Legionella monitoring, would agree that monitoring
should be considered if enough legionellosis risk factors apply to the system
in question. No management program, regardless of its treatment, maintenance or
monitoring components, can guarantee the absence of future legionellosis, but
prudent operational practices combined with ongoing review of risk factors will
allow facility managers to minimize exposure to Legionella and to its legal consequences.
PDF Version
Innovations in the Activated Carbon Industry
Water Quality Products
February 2002
Henry Nowicki, Barbara Sherman and Homer Yute
Like an international cookbook, the attendees of the Ninth Annual International Activated Carbon Conference (IACC) from around the world contributed to a recipe for a successful future for the activated carbon industry. Speakers brought their new ideas and on-going practices together. This annual conference had guests from all over the United States, Canada, Australia, Sri Lanka, Indonesia, Mexico, South Africa and India. The conference connects buyers, sellers and users of activated carbon and related materials and services.
PDF Version
RO Maintenance
Water Quality Products
January 2002
Nevin Rudie
Understanding and reacting to the performance of a reverse osmosis (RO) system is necessary for continued successful operation. It is this interaction that allows us to quickly and correctly identify and correct issues that may arise.
PDF Version
Ultrafiltration Plant Provides Potable Water
Water Quality Products
December 2001
Contributed By PCI-Water
West of Scotland Water (WoSW) awarded a contract, under competitive tender, for its first ultrafiltration plant to PCI-Water. This is the first installation in the United Kingdom using a hydranautics-based UltraBar system.
PDF Version
Bioterrorism May Pose Threat to Water Supplies
Water Quality Products
December 2001
Wendi Hope King
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.
PDF Version
Filters Help Preserve Shipwreck
Water Quality Products
December 2001
The Belle, a small 17th-Century French frigate, was discovered in July 1995 in Matagorda Bay, Texas, in 12 feet of water. The delicate nature of the waterlogged wood meant it could not be allowed to dry out. The water storing the ship must be free of particulate, algae and bacteria and may contain only chemicals safe for the staff to work in. Water also must be kept particulate-free in order for the conservation solution to work properly.
PDF Version
Filters Help Preserve 17th Century Shipwreck
Water & Wastes Digest
December 2001
To most people, water clarity is important, but the nautical
archaeologists at Texas A&M University know that to rebuild a 300-year-old
ship, it is essential. They needed filtration equipment that was up to the
task.
Pure Water the Way It Was Meant to Be
Water Quality Products
November 2001
By Michael Pennington, Severn Trent Services
As the public becomes more health conscious and educated about water contamination, demand for bottled water continues to increase. In order to provide purified water, it is important to understand the reverse osmosis (RO) water purification process.
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POU Options for Arsenic
Water Quality Products
November 2001
The topic of arsenic has received a lot of press coverage this year, ever since the Bush administration halted the EPA’s newly issued maximum contaminant level (MCL) of 10 parts per billion (ppb). Since then, the MCL was reinstated back to 50 ppb and further discussions and studies have continued. This article will discuss some of these updates.
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Water and Air UV Treatment
Water Quality Products
November 2001
By Bak Srikanth, Aquafine Corp., and David Witham, UltraViolet Devices, Inc.
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.
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Q&A: Polymeric Membrane Filtration
Water Quality Products
October 2001
Wendi Hope King
The following interview is with Robert Huehmer, who currently is process manager with USFilter?s (a Vivendi Water company) Memcor, Microfloc and General Filter products division, located in Timonium, Md.
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Judicial Equities Override Filtration Requirement
Water Engineering & Management
October 2001
Dan Kucera
A recent federal court decision may have created an opportunity for relief from United States Environmental Protection Agency (EPA) rules that impose costs that substantially exceed benefits.
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Controlling Mechanisms of Contaminant Ion Leakage in Condensate Polishing Systems
Water Quality Products
September 2001
Stephen W. Najmy, The Dow Chemical Co.
Extracting the maximum benefit from condensate polishing systems continues to be a top priority among many electric utility plants. With cost reduction pressures and increasing water quality standards, owners and operators continue to evaluate the resin handling procedures that affect corrosion product transport and contaminant ion impurity levels.
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Carbon Block Manufacturing
Water Quality Products
June 2001
Michael D, Steinhardt, US Filter
Carbon block is used in a wide variety of applications and performs a wider range of filtration tasks than other products. How carbon block is engineered will determine its use.
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