Upgrade Undertaking   Water & Wastes Digest May 2008   By Neda Simeonova
How one city handles plant improvements and funding challenges to comply with new regulations and meet future water needs
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Saving Money Under the Sun   Water & Wastes Digest January 2008   By Bob Nobile
Three applications demonstrate how solar-powered circulators produce cost savings, odor control and energy efficiency
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Sludge Solutions   Water & Wastes Digest September 2007   By Dan Tumis
Sludge blanket level analyzers prove effective in King County, Wash., wastewater treatment plant
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High-Speed Technology Brings Low Costs   Water & Wastes Digest August 2007   By Gerald Shumaker
By replacing aeration blowers, the DePere WWTP reduced operating and maintenance costs and experienced other unforeseen benefits
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The 90-Inch Double-Stopple Project   Water & Wastes Digest July 2007   By Neda Simeonova & Clare Pierson
To make room for a new runway, Chicago’s O’Hare Modernization Project required that a 90-in. water main be relocated without disrupting service to 300,000-plus residents in seven communities
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Indy Implements Infrastructure Rehab   Water & Wastes Digest July 2007   By Carlton Ray
Indianapolis takes on the largest investment in clean water infrastructure in city history
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Georgia On My Mind   Water & Wastes Digest July 2007   By Tim Gregorski
The Tussahaw Reservoir and Water Treatment Facility opens to serve a fast growing community and a drought-stricken state
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Utility Finds Answer in Tablet Chlorination   Water & Wastes Digest July 2007   By Scott Betcher
Colorado water and sanitation district chooses Accu-Tab tablet chlorination for a supplemental system to locate at well sites
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Mehan on Water: God Gave Us the Water, but Who Pays for the Pipes?   Water & Wastes Digest May 2007   By G. Tracy Mehan, III
The EPA’s Four Pillars of Sustainable Infrastructure provide the basis for the future of infrastructure management

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

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

ACE06 Offers Plenty of Highlights to Industry   Water & Wastes Digest January 2006   Tim Gregorski

ACE06 Offers Plenty of Highlights to Industry   Water & Wastes Digest January 2006   Tim Gregorski

Standing Up to a Stern Test   Water & Wastes Digest October 2005   Nadia Abbott

All in a Day’s Work   Water & Wastes Digest February 2005   By Tim Gregorski
Ongoing water wars, responding to hurricanes and protecting watersheds part of the daily grind for the Southwest Florida Water Management District

Steady But Sure   Water & Wastes Digest December 2004   By Tim Gregorski
Additionally, WWD asked those interviewed for their comments on what the industry can expect in 2005.

The First Seven Years of Operation at an Ultrafiltration Plant   Water & Wastes Digest October 2004   By James J. Vecchio and Antonia von Gottberg
Many membrane filtration plants for municipal applications have been installed over the last few years, but few plants have been in operation for seven years, and even fewer use the original membranes

Keeping Up With the Times   Water & Wastes Digest October 2004   By Tim Gregorski
WWD examines some of North America’s the latest municipal upgrades.

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

Dealt A Straight Flush   Water & Wastes Digest August 2004   By Dan McKeague
“Flushing, especially early in the year, was taking my employees away from other, more productive tasks” said Jason Green, owner of CWS.

Ending Odor Complaints   Water & Wastes Digest May 2004
A long-running odor problem was solved by tapping a 30,000-cfm-capacity biofilter array into a 14 mgd average, 55 mgd maximum sewage transfer line. The line discharges into underground junction box, with the odor control system’s main collection duct evacuating box headspace air above ground for humidification and biofiltration before discharge to atmosphere through fan stacks.

Public-Private Partnerships Continue to Flourish   Water & Wastes Digest May 2004   By Eric Risch
While the number of public-private partnerships continues to grow, the full potential of private sector involvement has yet to be realized.

Municipal Aqueduct System Uses Fiber-Reinforced Polymer Technology for Repair and Strengthening   Water Engineering & Management March 2003   Jay Thomas and Robert St. John
The Providence Water Supply Board faced such a dilemma in 1998 when a major section of a 102"-diameter water line in Cranston, R.I., failed completely. The Providence water line failure raised valid concerns that other sections of the aqueduct also could be prone to failure, since the pipes originally had been installed as long as 50 years ago. Using lightweight, flexible carbon fiber material for strengthening the Providence Aqueduct turned out to be an innovative, cost-effective solution.
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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).
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Water Security Summit Consensus   Water Quality Products February 2002   Haestad Methods
The theme at the first-of-its-kind Water Security Summit 2001, sponsored by Haestad Methods on December 3 and 4, was “Prevent. Detect. Respond.” More than 600 water utility and government officials from the United States and 20 other countries gathered in Hartford, Conn., to hear 30 experts discuss vulnerability and security measures for the nation’s water supply infrastructure in the event of a bioterrorist attack. Both speakers and attendees explored water system vulnerabilities; discussed guidelines for implementing security plans; and reviewed existing federal, state and private resources.
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Plastic Pipes Handle Pressure from RO Plant   Water Quality Products January 2002   Submitted by the Plastics Pipe Institute
The El Paso County Water Authority was in need of a cost-effective pipe for its reverse osmosis treatment project to supply clean water. A competitive price won the attention of a Texas engineering firm to high density polythylene (HDPE) pipe. HDPE?s performance won some loyalty.
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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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Treatment Plant Cuts Hydrogen Sulfide Odor With Sodium Nitrite/Nitrate Blend   Water & Wastes Digest October 2001
The Johnstown, Penn., Wastewater Treatment Plant has found a simple and relatively inexpensive chemical solution to a chronic hydrogen sulfide odor problem.

Products In Action: Valves   Water & Wastes Digest August 2001   Jay R. Smith Mfg Co.
When one municipality needed to protect commercial and residential property from back flow in the sanitary sewer line they used the Flood-Gate Automatic Backwater Valve 7140, from Jay R. Smith Mfg. Company located in Montgomery, Alabama.

Polyethylene Pipe Chosen for Delicate Northwest Estuary/Aquarium   Water & Wastes Digest July 2001
Two plants separated by Oregon's Yaquina Bay needed to be connected with two separate pipelines: one line to bring raw sewage to the new plant and one line to carry the finished refuse back to the old plant.
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New Water Meter Thrives in Harsh Environment   Water & Wastes Digest July 2001
The Nevada desert: grit, dust, blazing hot sun by day and ground frosts by night. Just the place to stake out a water meter in an open pit and see how long it can last. That is what happened to a new SmartMeter -- with some revealing results.
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New Pumping System Helps Conserve Water, Energy for Utah Conservation District   Water & Wastes Digest July 2001
The Ogden, Utah, area sought more cost effective and energy efficient ways to optimize and conserve its natural resources.
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Using Variable Frequency Drives for Sewage Lift Stations   Water & Wastes Digest July 2001
High in the Pocono Mountains of Eastern Pennsylvania, the small town of Tobyhanna was in need of a high head, small flow sewage lift pump.
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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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Self-performed Dewatering Enhances California Sewer Line Project   Water & Wastes Digest April 2001
After years of relying on specialty subcontractors to dewater their deep ditch projects, Jaeger Construction, Inc. self-performed the work on the North Davis Sanitary Sewer Trunkline Project for the city of Salinas, California.
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Insertable Electromagnetic Flowmeter Solves Difficult Piping Problem   Water & Wastes Digest April 2001
A difficult piping arrangement that included limited distance between the metering site and pipe fittings posed a dilemma for the engineering staff at a city of Frederick, Maryland, raw water pumping station.
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Effluent Diffusers Improve Water Quality, Meet Regulations   Water & Wastes Digest March 2001   WWD Staff
In order to obtain a better permit, a Midwest plant needed to significantly reduce the pollutant concentrations being produced by its current level of discharge. Working with a consultant, management decided an effluent diffuser would be a more reliable and cost-effective option than altering the treatment process or installing a second outfall line.
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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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Pipe Installed Under LAX Runways, Terminals with No Service Disruptions   Water & Wastes Digest March 2001   WWD Staff
The challenge was to rehabilitate a 2.5 mile sewer running under one of the busiest airports in the world without interrupting flight operations or vehicular traffic. The site was Los Angeles International Airport (LAX).
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Carrier Pipe Installed In Minimal Time Using Casing Spacers   Water & Wastes Digest March 2001   WWD Staff
A recent addition to the Medina County Sanitary pipe grid included placing close to 300 feet of cased pipe under a Cleveland suburb. Project managers sought a means to do the job in minimal installation time.
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Unique Dewatering Method Minimizes Handling   Water & Wastes Digest February 2001   Edited by WWD staff
Throughout the 70s and 80s, a dramatic evolution took place in the area of environmental regulations. In the midst of these rapidly changing government mandates, numerous technological advancements were made, as business and industry raced to keep in compliance. One such technology was "dewatering."
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Data Acquisition, Legacy Systems and Your Intranet   Water & Wastes Digest February 2001   By Fred Noble
There are lots of parallels between the events of November 2000 and the events that take place in any factory or municipality that runs a process or monitors its effluent. The technology exists to achieve the much-talked-about six sigma (3.4 errors per million events) levels of measurement quality or process integrity. But antiquated legacy systems keep getting in the way. And, as is the case on the American political scene, it just is not that easy to replace those old methods of measuring things.

Municipal Plant Upgrades Wastewater Treatment With New Magnetic Flowmeters   Water & Wastes Digest February 2001
Wisconsin's Madison Metropolitan Sewerage District needed to replace its aging electromagnetic flowmeters at 32 points in its Nine Springs Wastewater Treatment Plant. After carefully weighing its options, the district decided to purchase UniMag magmeters from Isco, Inc.
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Innovative Odor Control -- A Good Neighbor Program   Water & Wastes Digest February 2001
The Water and Wastewater Utility Department of the city of Austin, Texas, manages the operation of a regional sludge processing facility where they faced an odor problem. Working with a consultant, they purchased a fixed bed, iron oxide based odor control system from The SulfaTreat Company.
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Nanofiltration Membranes   Water Quality Products January 2001   Harold Nicoll
Nanofiltration is a liquid separation membrane technology positioned between reverse osmosis (RO) and ultrafiltration.
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New SCADA System Reduces Downtime at Omaha Utility   Water & Wastes Digest January 2001

Like all municipalities, the agency responsible for the distribution of natural gas and water throughout the metropolitan area of Omaha, Nebraska – the Metropolitan Utilities District (MUD) – needed a SCADA system that is user-friendly and failsafe.

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Breathing New Life Into a Legacy SCADA System   Water Engineering & Management August 2000
When the Town of Derry in New Hampshire set out to upgrade its Supervisory Control and Data Acquisition (SCADA) system in the fall of 1999, it faced the challenge of adapting the new system to its existing remote telemetry units (RTUs).

Water Storage Tank Fulfills Water Needs   Water Engineering & Management August 2000
A conspicuous structure with alternating red and white stripes stands in the City of Sylacauga, 45 miles southeast of Birmingham, Ala. The brightly colored, towering object is a new water storage tank, the largest to be built in the city and a crucial contribution to the city’s present water needs and future growth.

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.

From Eyesore to State-of-the-Art Facility: Pump Station Transformation   Water Engineering & Management August 2000   Roger Frauenfelder, P.E.
What was formerly a contaminated auto wrecking yard that twice caught fire and was an eyesore to the local community is being transformed into a state-of-the-art pump station. This transformation not only resolves critical infrastructure needs but also is aesthetically pleasing.

Controls Save Sinking Systems at Two Wastewater Treatment Plants   Water Engineering & Management July 2000
Back in 1980 when the North Buffalo (N.C.) Wastewater Treatment Plant went online with a central computer linked directly to all of its field devices, operators were excited by the newfound advantages of automation.

City of Hollywood Revises Industrial Pretreatment   Water Engineering & Management July 2000   Frederick Bloetscher, P.E., Lisa Meday-Futo, Whitifeld R. Van Cott and Robert Fergan, P.E.
The City of Hollywood (Fla.) is located in southeast Broward County, with a land area of approximately 29 square miles. However, the City is a regional wastewater service provider to areas outside the City that are termed "Large Users."

Pipe Used in Rehab of County Sewer Inceptions   Water Engineering & Management July 2000
For ten years, Hobas Pipe USA and the Los Angeles County Sanitation District (LACSD) have united to renew many of the County's 21 to 108-inch sewer interceptors.

Computer Simulation Helps Prague Modernize and Expand Sewer System   Water Engineering & Management June 2000   John E. Richardson, Ph.D., P.E., and Karel Pryl
Computer simulation is playing a critical role in helping the City of Prague in the Czech Republic modernize and expand its sewer system.

Concrete Pipe Reduces Strain on Austin’s Water Supply   Water Engineering & Management June 2000
Since 1845 when it became the capital of the state of Texas, the City of Austin’s primary focus was on government. However, in the late 1970s, the character and employment pattern of the city began to change.

Accurate Polymer Feed System Reduces Time and Cost for Sludge Dewatering   Water Engineering & Management June 2000   Tom Kruzick
High performance dry polymer mixing and feed have boosted the efficiency of a new anaerobic digestion system at the 20 mgd Oshkosh, Wis., wastewater treatment plant.

Municipality Optimizes Aeration Process By Using Unique Aspirator Combination   Water Engineering & Management May 2000
Floating and submersible aspirators have different discharge patterns that provide different capabilities in suspending solids and distributing oxygen.

Tablet Chlorination Systems Allow Plants to Meet Stricter Government/Insurance Regulations   Water Engineering & Management May 2000
The Fort Valley municipal water plant had used chlorine gas cylinders for many years. A pair of one-ton cylinders were in operation at the wastewater plant and 150-lb. cylinders at the McLeon and Jones water plants. However, new government and insurance regulations forced management to reevaluate its chlorination strategy.

Automating the Sludge Pumping/Polymer Metering Systems   Water Engineering & Management May 2000   Ted Follest
The Duffin Creek Water Pollution Control Plant (WPCP), located near Toronto, Ontario, Canada, has installed a state-of-the-art, computer controlled system to regulate polymer injection rates.

New Arsenic Treatment Technology Tested in India   Water & Wastes Digest May 2000
A new low cost technology for purifying arsenic contaminated groundwater assists the government of India in removing this slow but steady assassin from their midst.

Water Resources Management in Grand Turk - Part 2   Water Engineering & Management April 2000   Fernando Pérez Monteagudo and María Fernandez Miquel
The first part of this article traced water resources development, its quality and the demand in Grand Turk. It appeared in the March issue.

The Gray Area: The Difference Between Commercial and Industrial   Water Quality Products February 2000   Wendi Hope King
For a long time, the commercial and industrial (C&I) markets have been accepted as one sector of the water industry. Although considered different from such other markets as residential, agricultural and wastewater, there is a large murky area when being separated from each other.

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.

Ozone Generator Improves Cobb Area County Water Quality   Water Quality Products November 1999
The Cobb Area County Water District of Middleton, Calif., achieved a major improvement in the district’s water quality by approximately 40 percent, from one of its major water sources—a well near one of its pumping stations.

Chicago Treatment Facilities Utilize Latest TechnologyIn Monitoring, Data Acquisition   Water & Wastes Digest October 1999
Chicago is home to the two largest water treatment plants in the world. The rigorous process followed must meet both U.S. Environmental Protection Agency and Illinois Pollution Control Board standards.

Wastewater Authority's Cogen System Uses Renewable Biogas   Water & Wastes Digest September 1999
The influx of neighboring residents, coupled with impending stringent environmental regulations, pushed the Encina Wastewater Authority to incorporate an ambitious four-phase facility improvement program. Major improvements included a $1.3 million investment to optimize the cogeneration facility.

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.