Understanding the Alpha Factor
Membrane Technology
March 2008
By Malcolm E. Fabiyi
Applying the alpha factor and pure oxygen to reduce aeration power demand
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
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
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
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
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
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.
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.
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
Control Strategy
Membrane Technology
November 2006
By Dennis Livingston, Hiren Trivedi & Chintan Parikh
Examining the MBR system at the Yulee Wastewater Treatment Plant
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.
Accommodating Growth
Water & Wastes Digest
September 2006
By Rusti Holguin
Small wastewater plant upgrade incorporates MBRs and extended aeration to help with sludge
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
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
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.
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.
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.
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.
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.
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
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
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—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
Chlorination and Its Alternatives
Water Quality Products
March 2002
By Anne Penkal and Nadia Abboud, Severn Trent Services, Inc.
Purification of drinking water containing microbiological contamination requires some form of disinfection treatment to kill or render microbiological organisms harmless.
Of the available disinfection treatment methods for private water systems, chlorination in the most commonly used.
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
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
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.
PDF Version
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.
PDF Version
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.
PDF Version
Biofouling in Raw Water Supply Wells and Its Impact
Water Engineering & Management
October 2001
Frederick Bloetscher, P.E., Gerhardt M. Witt, P.G. and Robert E. Fergan, P.E.
As membrane systems become more prominent in the treatment of well water supplies, more care must be taken to review the effects of microbiological contamination.
PDF Version
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.
PDF Version
Orlando Shines Its Spotlight on Drinking Water
Water Quality Products
May 2001
Wendi Hope King, WQP Staff
In the midst of sunny Orlando (well, sort of) with theme parks and shopping galore, lay a convention center filled with great promise. Innovative products, treatment options, expertise, networking and a sharing of ideas: all of these are what the WQA promised at this year?s Conference and Trade Show in March. Did it succeed in providing these things to its attendees?
PDF Version
Verification Testing: The First Step to Clean Water
Water Engineering & Management
April 2001
Gene C. Koontz, P.E., and Andrea L. Santa
Who is testing manufacturers’ purification systems and equipment? This article describes EPA’s Environmental Technology Verification Program.
New Cartridge-type D.O. Sensor Saves Time, Money
Water & Wastes Digest
April 2001
By Jim Klauer
To address the inherent measurement problems of electrode contamination, electrolyte depletion, and membrane coating, GLI International, Inc. has introduced a dissolved oxygen sensor featuring a replaceable membrane cartridge.
PDF Version
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.
PDF Version
Nanofiltration Membranes
Water Quality Products
January 2001
Harold Nicoll
Nanofiltration is a liquid separation membrane technology positioned between reverse osmosis (RO) and ultrafiltration.
PDF Version
| 
RSS: WWD Articles