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
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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
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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
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One Great View
Water & Wastes Digest
May 2007
By Tim Gregorski
The world’s largest immersed UF plant is now fully operational
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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
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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
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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.
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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.
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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
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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.
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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.
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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.
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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%.
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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.
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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.
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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.
PDF Version
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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.
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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
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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
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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.
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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.
PDF Version
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Ultraviolet System Design
Water Quality Products
May 2001
Adam Donnellan
In the last issue, we reviewed ultraviolet (UV) disinfection as a suitable technology for treating biologically unsafe water supplies. In this article, we will focus on system design and understanding the many available options for residential and commercial applications.
PDF Version
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Ultrafiltration
Water Quality Products
December 2000
Mike Sadar
Ultrafiltration (UF) rapidly is becoming a common and practical method of preparing pure water that is free of particulate matter.
PDF Version
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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.
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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.
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Teamwork Provides Water Recovery/Waste Dehydration Process Success
Water Engineering & Management
July 2000
Andrew Starzecki
Goulston Technologies has practiced evaporator techniques over four years to separate water from oil and surfactant mixture. A joint development effort was pursued with a local company, Recovery Technologies Corporation (RTC), Charlotte, N.C., to take the evaporation process one step further in terms of dewatering, and also toward active product recovery and potential recycle.
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The Challenge of Membrane Maintenance
Water Quality Products
February 2000
Peter Cartwright
The membrane processing technologies of microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) are widely used to separate suspended and dissolved materials from water solutions in numerous industrial, medical and drinking water applications.
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Desalination of Seawater and Brackish Water
Water Quality Products
January 2000
Wil Pergande and Barry Abolmaali
The increasingly broad range of requirements for water quality has motivated the water treatment industry to refine existing techniques, combine methods and explore new water purification technologies including desalination.
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Manufacturing with Membranes
Water Quality Products
March 1999
Steve Morris
An overview of various filtration methods and their applications.
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Membrane Filtration for Water and Wastewater
Water Quality Products
February 1999
Membrane filtration, widely used in chemical and biotechnology processes, is already established as a valuable means of filtering and cleaning wastewater and industrial process water.
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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
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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.
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Membrane Applications in Water Plants
Water Engineering & Management
August 1995
Ian Lisk
Faced with upgrading aging facilities, a Florida water utility decided to incorporate reverse osmosis.
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