Filtration In Water and Wastewater Analysis   Water Quality Products December 2004   L.P. Raman
As simple as it looks, the filtration media and how it works is more complex that what meets the eye.
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Whole House Filtration   Water Quality Products April 2004   Sophie Waghorn
Whole house filtration systems are the end of the line in defense against contaminated water. They are becoming more popular as a non-visible way (compared with end of faucet filters) to ensure safety at point of entry in the house.
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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.
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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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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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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.
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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.

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.
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Dried Up: Raisin Producer's New Process Cuts Wastewater and Odors   Water Engineering & Management January 2003   David Pearson
Thanks to a new membrane filtration system, National Raisin Company, Fowler, Calif., not only has been able to cut its wastewater costs, but it also has opened up a potentially lucrative source of additional income.
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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.
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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.

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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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.

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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Packaged Treatment Plant Treats Tough Water Supplies Consistently, Economically   Water & Wastes Digest May 2002   Darin St. Germain
Since the 1960s, municipalities and industries have used packaged water treatment plants to successfully and economically treat small water supplies. These packaged plants have offered a smaller footprint, lower capital cost and easy operation.

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.
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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.
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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.
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Slowsand - Nanofiltration in Small Drinking Water Systems   Water Quality Products January 2002   C. Brent Cluff, Ph.D.
The patented combination of slowsand with nanofiltration offers benefits that merit considerable discussion. This combination successfully was piloted by the University of Arizona beginning in 1987.
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Biofilm Elements Treat Colorado Town   Water Engineering & Management January 2002
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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.
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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.
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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.
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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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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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Process Effectively Strips Hydrogen Sulfide Gas from Wastewater   Water Engineering & Management November 2001
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Products In Action   Water & Wastes Digest November 2001
Microfiltration, Nanofiltration Help Meet EPA Standards at Lake Mead

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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Editorial Emphasis: Wastewater Treatment   Water & Wastes Digest September 2001   Infiltrator Systems Inc.
Exfiltration System Uses Distribution Chambers To Protect Sensitive Lake Erie

Evaluation of the Use of Crushed Recycled Glass as a Filter Medium: Part 2   Water Engineering & Management August 2001   Richard W. Elliott, P.E.
Performance studies show that crushed recycled glass can provide capital and annual cost savings over traditional sand filter media.
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Evaluation of the Use of Crushed Recycled Glass as a Filter Medium: Part 1   Water Engineering & Management July 2001   Richard W. Elliott, P.E.
When compared with traditional sand filter media, crushed recycled glass can provide significant capital and annual cost savings.
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How to Remove Emulsified Oil from Wastewater with Organoclays   Water Engineering & Management July 2001   George R. Alther
This article defines what organoclays are and details how they are being used to remove oil and grease from wastewater.
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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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Continuous Microfiltration System Ensures Safe Drinking Water For Wisconsin Residents   Water & Wastes Digest May 2001
The Kenosha Water Utility treatment facility, located on the shores of Lake Michigan in Wisconsin, needed to upgrade its two plants to meet the expanding water needs of the community it services. Continuous microfiltration helped meet those needs.
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Filter Cartridges   Water Quality Products May 2001   Compiled by Wendi Hope King, WQP Staff
The following is some basic information compiled from industry experts at diverse companies. Additional information is available at the contact information provided.
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A Leading Team   Water Quality Products March 2001   Wendi Hope King, WQP Staff
After nine months of silence, the Osmonics team emerges renewed and ready for a future full of success.
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Seawater Desalination With Reverse Osmosis   Water Quality Products March 2001   Jorg Menningmann, Waterlink Pure Water Division
Desalination technology has brought fresh water and hence industrial and commercial development to areas of the world that otherwise might have remained unproductive. Not only has development been enhanced by this technology but, more importantly, the health and welfare of many people have been improved by the supply of sanitary fresh water supplies.
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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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Water Softening   Water Quality Products January 2001   Nancy Lucas, Cargill Salt
Among the many challenges water softening dealers face, one of most difficult can be the presence of iron in a customer’s water supply, particularly in areas where iron content is high. Iron can be a challenge to identify, let alone to recommend an effective and efficient treatment.

Water Reuse for Drought-proof Industrial Water Supply in San Diego   Water & Wastes Digest November 2000
A 200,000 gallon per day (gpd) advanced microfiltration system treats secondary wastewater effluent for reuse as process water for Toppan Electronics, Inc. in San Diego, Calif.

Pennsylvania Filtration Plant Helps Meet NPDES Discharge Requirements   Water & Wastes Digest October 2000
In the early 1990s, the Milford-Trumbauersville Area Sewer Authority in Bucks County, Pennsylvania, recognized the need to upgrade the existing sewage treatment plant. This was necessary to increase capacity and to meet future more stringent requirements set by the Pennsylvania Department of Environmental Protection for Unami Creek.

New Equipment Provides Economical Dewatering in Waste Storage Tank   Water & Wastes Digest October 2000
In 1999, the GNI Group was faced with a growing problem at its facility in Corpus Christi, Texas. A 200,000 gallon waste storage tank was beginning to fill with accumulated solids, reducing the working capacity of the tank.

Valve Control Network Helps Bring Aging Water Plant Up to Date   Water Engineering & Management August 2000
The City of Bismark, N.D., in 1996 drafted a plan to upgrade the filter beds in its 43-year-old water treatment plant. The goal was to advance into a networked automation system that would provide up-to-date control of its filters and be easily expandable to keep pace with future automation demands.

Legionella: Minimizing Risks   Water Engineering & Management August 2000   W. Craig Meyer
Legionellosis, the disease caused by Legionella spc., is common, though most people would guess it is extremely rare. Outbreaks of Legionellosis, defined as a cluster of three or more cases in a single locale, occur regularly in the United States and much of the developed world.

Membrane Filtration As an Alternative: Part 2   Water Engineering & Management August 2000   Dr. Mohamed Lahlou
Part one of this article appeared in the July issue and discussed microfiltration and utrafiltration. This article discusses nanofiltration and reverse osmosis.

Nuclear Power Plants Crosslinked Resin Ion Exchange System Provdes the Right Reactor Water Chemistry   Water Quality Products July 2000   James Stahlbush and Stephen Najmy
In the nuclear power industry, finding an ion exchange system that provides the right feedwater and reactor water chemistry is a delicate balancing act. That?s why engineers at Niagara Mohawk?s Nine Mile Nuclear Power Station?Unit Two, a boiling water reactor with deep-bed condensate polishers in central New York, turned to The Dow Chemical Co. for help in meeting stringent industry guidelines for feedwater iron.

Membrane Filtration as an Alternative: Part 1   Water Engineering & Management July 2000   Dr. Mohamed Lahlou
Once considered a viable technology only for desalination, membrane processes are increasingly employed for removal of bacteria and other microorganisms, particulate material and natural organic material that can impart color, tastes and odors to the water.

Precision Tubing Ensures Purity of Water Filtration System   Water Engineering & Management June 2000
In today's laboratory environment, it is essential that pure water is available for numerous applications.

Bulk Bag Unloader, Flexible Conveyor Improve Filtration Effectiveness at Winery   Water Engineering & Management April 2000
Beringer Wine Estates, St. Helena, Calif., improved filtration effectiveness in its diatomaceous earth (DE) unloading and winery waste filtration area by an automated bulk bag unloader and flexible screw conveyor.

Ceramic Filters: The Fight Against Bacteria, Viruses and Protozoa   Water Quality Products April 2000   David Webb
How can someone protect himself from consuming water contaminated with Cryptosporidium or other microorganisms? One durable and competitively priced option is ceramic filters.

Exploring the Multifunctional Nature of Activated Carbon Filtration   Water Quality Products January 2000   Francis J. DeSilva
Granular activated carbon (GAC) is commonly used for removing organic constituents and residual disinfectants in water supplies. Activated carbon is a favored water treatment technique because of its multifunctional nature and the fact that it adds nothing detrimental to the treated water.
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Media Filters Reduce Biocide Costs at Dairy   Water Quality Products January 2000
A PEP SMF-FG-24 media filter from Process Efficiency Products, Inc., was installed on the remote sump to reduce biocide costs at the dairy.

Filter Design Helps Eliminate Fouling   Water Quality Products December 1999   Bill Hall, Sr.
Filtration is an important part of most water treatment systems. Filters range from simple cartridge systems to large commercial/industrial multi-tank systems, not to mention the large municipal systems that filter drinking water.

Fiber Reinforced Filter Housings   Water Quality Products April 1999   by Tom Boisseranc
A discussion of filter housings.

Innovative Housing Design Allows Three Bags in One Housing   Water Quality Products April 1999   by Edward DePouli
A history of filter housing design and one specific type which allows three bags in one housing.

CA Membranes: Under-the-Sink's Best Choice   Water Quality Products March 1999   Inge Bisconer
Cellulose acetate membranes serve as the under-the-sink choice for a host of reasons.
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Manufacturing with Membranes   Water Quality Products March 1999   Steve Morris
An overview of various filtration methods and their applications.

Alternative Technology Filtration Plant Based on California Department Regulations   Water Engineering & Management September 1998   David Pafundi and Paul Berry
Faced with exorbitant costs for conventional filtration treatment, one California city tried an alternative technology.

Activated Carbon Regeneration, Part 2   Water Quality Products April 1998   Henry G. Nowicki, Ph.D.
Conclusion of Activated Carbon Regeneration

Silica Fouling of a Weakly Basic Anion Resin   Water Quality Products April 1998

Activated Carbon Regeneration, Part 1   Water Quality Products March 1998   Henry G. Nowicki, Ph.D.
All AC applications end up with exhausted (spent) AC. This article will run in two parts and will touch on some considerations of generating spent AC and its regeneration

Advanced Water Treatment Technologies May Bring Repurified Water to San Diego   Water Quality Products March 1998   Inge bisconer
"In four years, half of San Diego may be filling its glasses with tap water that once ran through its toilets."

Comparing Type I Gel Anion Resins   Water Quality Products January 1998   Larry Gottlieb
Type I anion exchange resins are available today with a wide variety of physical and chemical properties.

Media is a Big Thing . . . But Not the Only Thing   Water Quality Products October 1997   George Ricci
Shower filter dechlorination requires its own unique design approach to meet various health requirements.

Three Basic Steps for Problem Water   Water Quality Products July 1997   by Robert E. Morgan and Scott Crawford
You, too, can be a hero in your area by successfully treating problem water. Yes, you will have homework and the job may not be as easy as other water conditions in your area, but you will be rewarded not only in accomplishment, but in future sales as other customers learn of your success.

Filtering Through the Claims of Varying Water Treatment Methods   Water Quality Products April 1997
A thorough discussion of not only water treatment systems, but also the contaminants they remove.
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Distinguishing Between Certified & Non-Certified Water Filters   Water Quality Products December 1996   Nancy Culotta
In the past year, manufacturers have begun advising consumers that the replacement elements they produce fit other manufacturers housings or pitchers and infer that the hybrid system will perform as well as the original system. This, in NSF's opinion, is not truthful information to the consumer.

Metals Removal with Ion Exchange Resins   Water Quality Products October 1996   Carl Galletti
Many impurities in water and other liquids exist as dissolved ionic species that can be removed by ion exchange processes

Microfiltration: How Does it Compare ?   Water Quality Products August 1996   Thomas Muilenberg
Increased focus on technologies that meet tighter regulatory requirements and increased public pressure has motivated municipalities to take a serious look at microfiltration (MF) membranes as a viable treatment option. This article is intended to familiarize you with the basics of microfiltration and discuss how it compares to conventional alternatives

Self-Cleaning POE System Solves Frequent Filter Clogging Problems   Water Quality Products August 1996   Gary Baxter
A new self-cleaning system avoids the premature clogging problems associated with conventional carbon filtration systems, while at the same time providing one micron or submicron filtration.

Activated Carbon Basics   Water Quality Products June 1996   Elwood V. Rhinehart
A brief summary of the sources of carbons, the activation process, the principle of adsorption, and the range of current applications
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Ultrafiltration Basics   Water Quality Products April 1996   Lynn Cotterill
Municipal and industrial sectors are looking to new and innovative technologies to meet the demands of modern day consumers' requirements. One such technology is ultrafiltration.

Cryptosporidium, Ozone & the POE/POU Industry   Water Quality Products November 1995   Ron Long
The challenge Cryptosporidium brings to all water professionals, whether municipal plant technicians or POE/POU industry members, is more than finding a means for treating a specific microbe.