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[ Filtration Menu ] Building from Scratch   Water & Wastes Digest August 2008   By Clare Pierson A city with no previous method of treatment for its drinking water embarks on an ambitious treatment plant to treat high levels of arsenic Membrane Week 2008   Water & Wastes Digest July 2008   By Water & Waste Digest AMTA/SEDA Joint Conference & Exposition focuses on membranes AMTA Charges Ahead   Water & Wastes Digest July 2008   By Clare Pierson Membranes Pass All the Right Tests   Water & Wastes Digest April 2008   By Warren Casey A plant expands its treatment options to address feedwater that increases in salinity by the day PDF Version Award-Winning Plant Meets Growing Needs   Water & Wastes Digest April 2008   By Stratton Tragellis A design-build-finance concept through one provider worked well for this Colorado plant PDF Version MBR System Takes Center Stage in Community Development   Water & Wastes Digest April 2008   By Christopher Lewis The new system will use water reuse & submerged membranes to produce high-quality effluent PDF Version The Ins & Outs of MBRs   Membrane Technology March 2008   By Terry Gellner An introduction to membranes, their surrounding systems and future PDF Version Understanding the Alpha Factor   Membrane Technology March 2008   By Malcolm E. Fabiyi Applying the alpha factor and pure oxygen to reduce aeration power demand Membrane Week 2008   Membrane Technology March 2008   By AMTA AMTA/SEDA Joint Conference & Exposition focuses on membranes PDF Version Ultrafiltration Gains Performance Edge   Membrane Technology March 2008   By Emily Gilbert & Kate Koerber The XIGA dead-end filtration concept provides for a wide dynamic operating range, requiring fewer flow controls and operating modes Improving Membrane Performance with Pretreatment   Membrane Technology March 2008   By Brian S. Fraser Phillipsburg, Kan., facility uses pretreatment to maintain high-quality feedwater PDF Version Nutrient Removal   Membrane Technology March 2008   By Fred R. Gaines & Christopher Lewis Controlling the discharge of nutrients from U.S. wastewater treatment plants (WWTPs) PDF Version Built to Last   Membrane Technology March 2008   By Craig Granlund RO elements stand the test of time at a North Dakota electric utility PDF Version Membranes Reclaim Wastewater at 86% Recovery in Singapore   Water & Wastes Digest March 2008   By Niann-Tsyr Yuen Filmtec fouling-resistant membranes provide a technical solution PDF Version Pioneering Water Reuse   Water & Wastes Digest January 2008   By John Koch A New Mexico village implements a water conservation and potable reuse project using membrane technology PDF Version Providing a Strong Defense   Water & Wastes Digest January 2008   Koch Membrane Systems Department of Defense speeds deployment of tactical water purification systems with commercial off-the-shelf ultrafiltration membranes 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 Operation & Maintenance of Membrane Facilities   Water & Wastes Digest November 2007   American Membrane Technology Association Bromley on Membranes: Assessing Membrane Technology   Water & Wastes Digest November 2007   By David Bromley A close look at the problem of membrane fouling Expanding Capacity Without Expanding Size   Water & Wastes Digest October 2007   By Clare Pierson MBR technology solves a plant’s age-old problem of needing more capacity but not having the room for it 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 Membrane Bioreactors 101   Water & Wastes Digest September 2007   By Guillermo Garcia The use of MBR technology in wastewater treatment facilities is on the rise PDF Version Options for Inland Membrane Concentrate Disposal   Water & Wastes Digest July 2007   By Phil Brandhuber Five options for waste disposal when treating brackish water PDF Version Gambling on Membranes   Water & Wastes Digest July 2007   By Clare Pierson AMTA celebrates its 35th year of operation at its upcoming July convention in Las Vegas PDF Version Membranes in Manitowoc   Water & Wastes Digest May 2007   by Clare Pierson Manitowoc Public Utilities is one of the few to operate pressurized and submerged membrane filtration side by side Pioneering MBR Technology in Missouri   Water & Wastes Digest April 2007   by Clare Pierson This new facility is disguised as just another house on the block Rasing the Bar   Membrane Technology March 2007   By Dennis Livingston and Jennifer Qin Delphos, Ohio WWTP upgrade incorporates MBR system Reliable Barrier   Membrane Technology March 2007   Sunny Yoshitomi, Craig Olson and Kevin Kennedy Using low-pressure membranes to achieve surface water treatment rule compliance The Future of Desalination   WWDmag.com January-December 2007   American Membrane Technology Association As water use increases, membrane technology use expands. Expanding Capacity and Quality   WWDmag.com January-December 2007   Tony Kobilnyk Membranes provide perfect fit for Utah water treatment plant upgrade Helping Mother Nature   Water & Wastes Digest November 2006   By Evelyn M. Scibelli East Shoshone County, Idaho, incorporates membrane water treatment system to reduce turbidity and increase drinking water quality The Rising Tide of Brackish Water Desalination   Water & Wastes Digest November 2006   By Erik Nottleson and Robin Puskas UF system will enable North America’s first tidally influenced, brackish water desalination plant to handle wide TDS fluctuations with minimal maintenance Superior Water Quality   Water & Wastes Digest November 2006   Amy Osgood Water & Wastes Digest asked David L. Brown, president of the American Membrane Technology Association and director of utilities for Jupiter, Fla., to discuss Jupiter’s pioneering and award-winning water utility, as well as the role membrane technology will play in addressing future water issues. Implementing Pressure & Submerged Membrane Filtration   Membrane Technology November 2006   Lisa Sorgini Plant expansion doubles treatment capacity in half the footprint Adding to the Value   Membrane Technology November 2006   Complied by Jeff Garwood and Steve Watzeck GE brings complete, integrated offerings to municipalities A Cost-Effective Solution   Membrane Technology November 2006   Tim Gregorski, editorial director Tim Gregorski, editorial director tgregorski@sgcmail.com Marco Island Welcomes Recycled Water   Membrane Technology November 2006   By Jenn Watt Packaged MBR plant maximizes WWTP expansion on resort island Control Strategy   Membrane Technology November 2006   By Dennis Livingston, Hiren Trivedi & Chintan Parikh Examining the MBR system at the Yulee Wastewater Treatment Plant Advocating Membrane Technology   Membrane Technology November 2006   By Ben Movahed The AMTA works to improve national water supplies Eliminating Membrane Fouling   Membrane Technology November 2006   By James E. Farmerie Gravity filtration proves effective for RO pretreatment 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. Laser Nephelometers Provide Ultra-Sensitive Membrane Performance Monitoring   Water & Wastes Digest September 2006   By Michael Sadar Ultra-low turbidity detection helps water district protect public health, meet regulatory requirements Accommodating Growth   Water & Wastes Digest September 2006   By Rusti Holguin Small wastewater plant upgrade incorporates MBRs and extended aeration to help with sludge World’s Second Largest Potable UF Plant Begins Production   Water & Wastes Digest May 2006   By Chad Hill and Jonathan Pressdee Membrane filtration plant will provide Minneapolis residents high-quality water for years to come Protecting Historic Charm   Water & Wastes Digest May 2006   By Ian Page Historic village of Dundee, Mich., upgrades MBR and aerobic digestion system to ensure problem-free treatment Evolution of Low-Pressure Membrane Technology   Membrane Technology March 2006   By Dr. Thomas Lebeau Technological advances have made membrane filtration a viable option for a variety of applications Power Station Utilizes RO Membranes   Membrane Technology March 2006   By Brad Buecker Suspended solids control with membranes—a developing technique for the power industry Alternative Solutions for a Sustainable Future   Membrane Technology March 2006   By Mark W. LeChevallier, Ph.D. Membrane filtration applications provide sustainable water managementBy Mark W. LeChevallier, Ph.D. Treating the Cause, Not the Symptom   Membrane Technology March 2006   By Dennis Livingston & Hiren Trivedi Understanding membrane performance in MBR applications through biohydraulics Dissolved Air Flotation   Membrane Technology March 2006   By James E. Farmerie DAF system proves effective in membrane pretreatment Setting New Standards   Membrane Technology March 2006   By T. David Chinn Twin Oaks Valley WTP provides high quality potable water and meets regulations Optimizing Pretreatment   Membrane Technology March 2006   By Steve Siverns ZeeWeed UF membranes offer lower life-cycle costs for seawater desalination Consistency is Key   Membrane Technology March 2006   By Lisa Sorgini Membranes solve taste, odor, turbidity and algae problems at Sunrise Water Authority Port Hope’s Dream Comes True   Water & Wastes Digest February 2006   By Tim Gregorski Small community home to new water treatment plant that can expand along with population Supply from the Sea—Exploring Ocean Desalination   Water & Wastes Digest January 2006   By Jeff Szytel, P.E. Although barriers exist in large-scale implementation of ocean desalination, the development of projects is expected to continue well into the future Follow the footprint   Water & Wastes Digest November 2005   Michael Norton Kennewick, Wash., water treatment plant doubles capacity following membrane retrofit Mile High Membranes   Water & Wastes Digest November 2005   By Tim Gregorski WWD talks with Bud Hart, water supply, treatment and quality manager at the Columbine (Colo.) Water Treatment Plant about the results of their membrane-related upgrades Do Membranes Fit Your Needs   Water & Wastes Digest November 2005   Karen DeCampli The Ideal Partnership   Membrane Technology November 2005   By Steve Siverns & Peter Wolf MBR Package Plant Offers Environmental, Economic Benefits   Membrane Technology November 2005   By Chris Plott & Teresa Sullivan Affordable and rapid retrofit of existing wastewater treatment plant ends sewer moratorium in Tennessee community The Key to Future Wastewater Treatment   Membrane Technology November 2005   By Dr. Klaus Vossenkaul A Model for Muni Treatment of Surface Water   Membrane Technology November 2005 As the first plant in the U.S. to combine the Actiflo pretreatment with the KMS ultra- filtration membranes, Cass County’s Public Water Supply District #7 serves as a model for municipal treatment of surface water. Membranes Offer Water Plant Flexibility   Membrane Technology November 2005   Lisa Sorgini Submerged membrane system doubles Kennewick plant’s capacity Advantages of Pressure MF Systems Over Vacuum Systems   Membrane Technology November 2005 Today, the value of the U.S. membrane market is more than $2 billion & growing at a rate of 8% per year. Realizing the Benefits of Improving RO Technology   Membrane Technology November 2005   Rich Franks and Craig Bartels Recent improvements in the design and construction of the RO element have come by focusing attention on the details of glue line placement, feed spacer configuration and the selection of the permeate carrier. Membranes Tailored as Needed   Membrane Technology November 2005   Warren Casey Taking Treatment Plants to a New Level   Membrane Technology November 2005 How to Handle Membrane Reject Water   Membrane Technology November 2005   Van Kile and Susie Kippenberger Mile High Membranes   Membrane Technology November 2005   By Tim Gregorski WWD talks with Bud Hart, water supply, treatment and quality manager at the Columbine (Colo.) Water Treatment Plant about the results of their membrane-related upgrades Just Another Day at the Beach   Water & Wastes Digest May 2005   By Don Richard Together, these systems were insufficient for near-term demand and they fell far short of the projected future needs for this fast-growing community. Wisconsin Shaping Water Treatment   Water & Wastes Digest May 2005   By Tom Bunker, Mark White and Scott Lenhardt Racine WTP opted for membranes because of their ability to provide an extra barrier against waterborne pathogens to the 110,000 people served by the plant. 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. Siphoning Out a Solution   Water & Wastes Digest April 2005   By Bob Patterson and Sophie Pease For years the city had relied on the nearby Thornhollow Springs and a series of eight wells for water, until the EPA concluded that the aquifer was under the influence of surface water and raised concerns that waterborne pathogens could contaminate the springs. 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 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 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. 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. Membranes Meet Total Water Treatment Needs for Growing City   Membrane Technology October 2004   by Tom Foley After more than two decades of outsourcing its wastewater treatment, city officials in American Canyon began to consider constructing plant of their own. 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. Ten Things You Need to Know   Membrane Technology October 2004   by Charles Liu, Ph.D., P.E., DEE The removal credit for any membrane system can be only granted as it can be verified by integrity testing. 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. Trouble-Free Operation   Membrane Technology October 2004   By James J. Vecchio and Antonia von Gottberg Manganese was present in the water at 0.70 mg/l, and iron concentrations were around 0.30 mg/l. Membranes Offer Flexible & Economical Water Treatment Options   Membrane Technology October 2004   by Stratton Tragellis and Ed Jordan Innovative and highly adaptable membrane technologies are discussed in the following case studies 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 The Great White North   Water & Wastes Digest August 2004   By Andrew Farr and Scott Lenhardt The objectives of the expansion stated that the plant should remain within the existing footprint, produce the highest quality drinking water at a reasonable cost and provide sufficient capacity to serve the region’s future needs. Tampa Bay Water’s Desalination Plant to Run Less Often, Undergo Repairs   Water & Wastes Digest August 2004   By Denise Covelli A critical 14-day performance test done in May 2003 uncovered 31 deficiencies in the plant. Membrane Filtration Aids Spring Water Clean-up   Water & Wastes Digest May 2004 “It was cost-effective, modular to fit our limited area, had a quiet backwash and filtered prechlorinated water.” Answering the Challenge   Water & Wastes Digest May 2004   By Eugene R. Reahl San Diego uses EDR technology to produce low salinity irrigation water from reclaimed municipal wastewater A Reliable Tool   Water & Wastes Digest April 2004   By Rick Davis By implementing fluorescent technology in the measurement of DO levels, wastewater professionals may have a reliable tool that allows for the optimization of the biological processes and a reduction in the aeration costs related to energy usage. The Next Step in Aeration Process Control   Water & Wastes Digest March 2004   By Jim Klauer This new control technology allows cost-effective oxygen profiling throughout the aeration basin, thereby improving plant performance and leading to additional energy savings. Double Option   Water & Wastes Digest January 2004   John Volbeda There are two primary technology options available for continuous dissolved oxygen measurement in aeration basins--bare- or open-electrode sensors, and membrane sensors. Both options are viable and offer plants specific benefits. The key is for plants to select which sensor will work best for their application and production workflow needs. 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. Capitalizing on Wastewater Treatment Process   Water & Wastes Digest September 2003   Randy Hill and Jenny Leverett Dayton Progress Corporation's focus has been on manufacturing metal punches, punch blanks and metal stamping tools. Part of the logistics behind running a global corporation includes the management of wastewater, for which Dayton relies on Crown Solutions, a water management firm. Crown's objective was the successful implementation of a tubular wastewater ultrafiltration (UF) system reducing the amount of waste hauled off-site by up to 95%. Metals Plant Needs High-Purity Water   Water Quality Products July 2003   Crown Solutions, Inc. Dayton Progress Corp.'s focus has been on manufacturing metal punches, punch blanks and metal stamping tools. It also would take experienced water treatment professionals to ensure that the proper quality water was used in each process. That is why it relied on Crown Solutions, Inc. to manage the point-of-use (POU) and point-of-entry (POE) water treatment for each of its manufacturing processes that required water. 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 Ozone Treatment for Residential Well Water   Water Quality Products June 2003   Myrle Melligan, Triple O Systems, Inc. Your customers not only are expecting to have enough water supplied from their water source, but they also demand that it is of superior quality. Ozone's technology coupled with such treatment as filters or softeners can fulfill this expectation. Ozone does not need to be complicated in order to treat small water systems. 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. Taking the Salt Out   Water Engineering & Management April 2003   Bill Swichtenberg Five large municipal water agencies have combined to advocate a significantly increased federal role in encouraging desalination. The group sees desalination as a viable, cost-effective way of making seawater and brackish groundwater reliable sources to supplement national drinking water supplies. PDF Version 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. 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 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 Municipalities Tap into Benefits of EDR Water Treatment   Water Engineering & Management February 2003 No one wants to drink radium, nitrates or arsenic. However, if not for some technologically advanced methods of removing these contaminants, we all might be sipping on some very unhealthy water. PDF Version 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. PDF Version 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. PDF Version Odor Control System   Water & Wastes Digest January 2003   Brent Howe Odor complaints have become an all too familiar subject to WWTP managers. They are not only expected to manage their plants effectively and efficiently, meeting both regulatory specs and budget requirements – they are also expected to be good neighbors and keep odor under control. This article describes the successful odor control efforts of the South Dearborn Regional Sewer District located in Lawrenceburg, Ind. New Analyzer Takes Readings During the Treatment Process   Water & Wastes Digest January 2003 A unique ammonia/phosphate analyzer designed to take readings directly in the wastewater, in other words, precisely where the nutrient concentration needs to be measured, also delivers real-time, online information about nutrient concentration in the process. 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 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. Mississippi Town Installs Nation's First RO/Ozone System   Water & Wastes Digest November 2002 The City of Pascagoula, Mississippi turned to Osmonics of Minnetonka, Minn., to provide a viable solution for the removal of undesired characteristics from their water supply, ensuring compliance with existing and 2001 EPA regulations. Osmonics' process of combining low energy RO in tandem with ozone generation and contacting equipment proved to be the optimal solution to Pascagoula's water deficiencies. 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 Practical Use of Ozone for the Well Water Application   Water Quality Products July 2002   Roger Nathanson, Ozone Pure Water, Inc. 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. PDF Version 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 Revisiting the Selection of Stainless Steel in Water and Wastewater Treatment Environments: Part 2   Water Engineering & Management June 2002   Frederick Bloetscher, Richard Bullock, Robert Fergen, Gerhardt Witt, & Gary Fries Aerobic bacteria (Crenothrix, Gallionella) primarily are encountered in the fresh surface waters, although anaerobic sulfate-reducing bacteria and facultative strains also are encountered. Ground waters are more likely to contain anaerobic and facultative bacteria, as well as Gallionella than surface waters.3 Sulfate-reducing bacteria also are found in seawater.3 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 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. PDF Version Ultraviolet for Disinfection   Water Quality Products April 2002   Tom Schaefer, Aquionics Historically, industry has relied on hazardous chemicals such as chlorine and expensive processes such as pasteurization to rid its water supplies of pathogens. Currently, though, the use of ultraviolet (UV) light, the same as the portion of the electromagnetic spectrum of sunlight responsible for killing microorganisms, is providing a safe, reliable and highly effective method of getting the job done. PDF Version 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�