Progressive Cavity Cake Pumps Replace Conveyor System   Water & Wastes Digest July 2003   Fred Murillo
Costly, time-consuming and persistent maintenance problems, coupled with unacceptable odor levels, prompted a major southwest wastewater treatment plant to scrap its sludge handling system.

New Wastewater Treatment Technology Emerges from Nevada Desert   Water & Wastes Digest January 2003
Out of a landscape parched for water?but certainly not ideas?comes a unique innovation in wastewater treatment from Premier Wastewater International (PWI tm). Based in southern Nevada, PWI has developed an economical treatment process that can remove more than 90 percent of the organic matter, according to Matt Russell, president and CEO.

Recent Advancements in Wastewater Sludge Composting   Water Engineering & Management October 2002   Izrail S. Turovskiy, D. Sc. and Jeffrey D. Westbrook, P.E.
Many utility providers face growing problems with the disposal of the wastewater sludges (residuals) that are created as part of the wastewater treatment process. Other providers are looking to additional methods for converting the residuals into fertilizer/soil conditioner with a higher economic and social value. The new technology presented in this paper provides a composting method to address the disposal and/or use of wastewater residuals. By maintaining the recommendations presented in this paper, a Class A biosolid can be produced. This Class A biosolid provides the utility operator the maximum flexibility for its disposal or use as a fertilizer, soil conditioner, etc.
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Floating Membrane Cover System Solves Odor Problem At Australian Treatment Plant   Water & Wastes Digest February 2002

Vortex System Proves Effective Mixing Biosolids In Storage Tanks   Water & Wastes Digest January 2002   J. Mark Crump
The Springfield Metro Sanitary District (SMSD), a wastewater treatment facility that serves Springfield, Illinois and surrounding communities, needed to meet the pathogen and vector-attraction reduction requirements and prevent nitrate levels from contaminating groundwater. After careful study, the SMSD selected a process that would allow it to store digested biosolids that accumulated when the sludge could not be applied.

Pretreatment System Reduces Pollutants in Rendering Facilities   Water Engineering & Management November 2001
The rendering industry contributes tremendously to efforts to maintain a clean and healthful environment and prevent a waste disposal problem by turning this otherwise unusable material into usable commodities. The CAF system has been successful at numerous rendering facilities.
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Microwave Propagation Helps Measure Sludge Density   Water Engineering & Management October 2001   John Hemphill
Measuring sludge density using microwave propagation can offer a high degree of accuracy even under the worst process conditions.
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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: Sludge Equipment   Water & Wastes Digest September 2001   Flo Trend
Trailer-mounted System Spreads Digested Sludge In Texas

Products In Action: Sludge Equipment #2   Water & Wastes Digest September 2001   Red Valve
Pinch Valves Control Flow at Georgia Solids Treatment Process Plant

Automated Heat Drying System Produces Class A Biosolids, Aids Storage   Water & Wastes Digest September 2001   USFilter
he rainy winter months in Forest City, North Carolina, posed a major challenge for the city’s wastewater treatment plant. In addition to treating wastewater, the city also recycled and stored biosolids — a byproduct of the wastewater treatment process.

Belt Filter Presses: Still a Cost-Effective Solution - Myth or Reality?   Water Engineering & Management September 2001   Glenn Curtis
When faced with upgrading or searching for alternative methods, the staff of one facility had to determine if their belt filter presses were still a cost-effective solution for their solids dewatering process.
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Technological Improvements for the Aerobic Digestion of Sludge   Water Engineering & Management August 2001   Izrail S. Turovskiy, D. Sc.
Aerobic digestion of low concentrated activated sludge with the heating of digested sludge can produce biosolids that meet 503 Class A sludge regulations.
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A New Process for the Drying and Gasification of Sewage Sludge   Water Engineering & Management May 2001   Brendan McAuley, Julie Kunkel and Stanley E. Manahan
Gasification can completely sterilize sewage sludge while circumventing many of the problems commonly encountered with incineration.

Bulk Tank Polymer Hauler Uses Economical Separator - Wins State, Local Ecological Awards   Water & Wastes Digest March 2001   WWD Staff
Trimac Transportation Company of Hayward, Calif. has been awarded a Certificate of Merit from the California Water Environment Association and the Hayward Environmental Achievement Award for Industrial Wastewater Control.
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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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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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Centrifuge Helps Filter Water and Process Fluids Automatically   Water Engineering & Management February 2001
Customers’ calls documenting the ability to remove solids that build up in their water in their production and processing plants continue to confirm for Jeffery Beattey, president of Midwest Engineered Products Corp., an original equipment manufacturer based in Indianapolis, Ind., that his recent invention of a new centrifuge for fluid filtration was just in time.
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City Converts Sludge to Biosolids for Reuse as a Soil Conditioner   Water Engineering & Management November 2000

Philadelphia Sewer Replacement A Work of Art   Water & Wastes Digest September 2000
Facing a task that might have daunted even Rocky, engineers from Philadelphia’s Water Department needed to replace the deteriorating Central Schuylkill east side intercepting sewer line running beneath the city’s famed Art Museum. They decided to install a parallel sewer line and use the existing sewer as an overflow line.

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.

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.

Municipal Sludge Dryer Produces Higher Solids Off the Press   Water & Wastes Digest February 2000
A municipal sludge dryer was designed and installed by USFilter’s Davis Products for the Oconee County South Carolina Sewer Commission at the Coneross Wastewater Treatment Plant. The dryer is integrated into existing dewatering facilities for the purpose of drying sludge into a Class A biosolid product.

Portable Level Detector Uses Probe to Locate Sludge Level in Clarifiers, Settling Tanks   Water & Wastes Digest April 1999

Cost-Effective Reduction of High-Strength Wastewater by Adsorption-Based Activated Sludge Technology   Water Engineering & Management December 1998   Botho Boehnke, Ph.D. mult., Rainer Schulze-Rettmer, Ph.D. and Stefan W. Zuckut, Ph.D.
The adsorption-biooxidation process has proved to be a cost-effective alternative to standard activated sludge technology.

Disposal Method Converts Animal Waste into Fuel   Water Engineering & Management July 1998

Digestion Process Stands Up to Extreme Cold and Rule 503 Compliance   Water Engineering & Management July 1998   Del Senst
To comply with EPA regulations, one wastewater plant turned to an innovative sludge digestion process and concrete tanks.

Generating Less F-006 Sludge   Water Engineering & Management May 1998

New Techniques for Wastewater and Sludge Treatment in Northern Regions   Water Engineering & Management May 1998   I. Turovskiy
A new method of wastewater purification bypasses primary settling to simplify treatment and reduce sludge volume.

Controlled Aerobic Digestion of Thickened Sludge: Challenges and Opportunities   Water & Wastes Digest February 1998
With the introduction of the new 503 Class B sludge regulations, operations managers must now look closely at the process of digestion and design systems that optimize performance while keeping capital and operating costs in line.

Wastewater Reclamation Plant Solves Sludge Pumping Problem   Water Engineering & Management January 1998

Mobile Unit Cuts Sludge Dewatering Costs for Rural Water Authority   Water Engineering & Management December 1997
A streamlined method of dewatering digested wastewater sludge is helping cut costs for one rural Virginia water authority.

Facility Expansion Eliminates Off-Site Hauling of Biosolids   Water Engineering & Management August 1997

Oxygen-enhanced Incineration Increases Throughput, Decreases Emissions   Water & Wastes Digest February 1997
In most wastewater treatment facilities, solids handling is the single most expensive operation. Innovative oxygen injection technology, combined with vacuum pressure swing adsorption (VPSA) oxygen supply systems, allows a plant to achieve a dramatic increase in personnel and equipment productivity with a minimal capital expense Ñ while reducing emissions.

Automating Wastewater Flows for Billing: Philadelphia's Success In Process for Profit (Part 2)   Water Engineering & Management October 1996   Thomas J. Day
The second half of this article gives guidelines for a successful Òsewage for profitÓ system development.

Automating Wastewater Flows for Billing: Philadelphia's Success in Process for Profit (Part 1)   Water Engineering & Management September 1996   Thomas J. Day
A municipal agency can act as a profit-making entity without losing sight of its primary goals

How to Ensure Passage of Wastewater Utility Investments   Water Engineering & Management August 1996   Margaret Norton-Arnold
As a basis for King County's recent planning effort, the agency chose to focus on products over technology.

Monitoring Reclaimed Wastewater Usage on Public Parkland Vegetation to Reduce Risks   Water Engineering & Management November 1995   G. Fred Lee and Anne Jones-Lee
A minimum monitoring program should be conducted to reduce the threat to public health and the environment when using reclaimed wastewater.

Scalping Biosolids: A Sludge Dewatering Alternative   Water Engineering & Management November 1995   Lawrence M. Kaplan, P.E.
By constructing and operating a scalping facility, some wastewater treatment plants can achieve great reductions in hauling and tipping fees.

One Piece of Equipment Solves Two Sludge Handling Problems   Water Engineering & Management October 1995   Robert E. Evans and Richard A. Seaburg
New equipment improves a wastewater plant's anaerobic digestion process and sludge disposal situation.

New Jersey Wastewater Authority Buys Farmland for Biosolids Disposal   Water Engineering & Management July 1995   Dennis W. Palmer and Clark G. Shimp
By buying farmland fpr dosposal of its biosolids waste, an enlarged New Jersey wastewater plant is on the way toward achieving a conservation goal.

Wastewater Disposal Goes Underground   Water Engineering & Management February 1995   Craig W. Lichty
A susbsurface percolation system has been adapted to handle the wastewater from a California town.

Long Range Planning for Biosolids Management   Water Engineering & Management February 1995   Margaret Norton-Arnold, Lisa Fitzhugh and Vicki Fischer
Given the regulatory demands imposed on sludge disposal, options for action have to be investigated carefully.

Applying Sludge to Agricultural Land - Within the Rules   Water Engineering & Management February 1995   George J. McDonald
A number of approaches to treating sludge for agricultural application are discussed.

Better Polymer Solution Quality Improves Wastewater Plant Performance   Water Engineering & Management November 1994   Hugh Taylor
Polymer mixing/feeding method enhances biosolids program.

Greening of the Desert   Water Engineering & Management November 1994   Bill Schoenecker
Sludge from three wastewater plants helps farm land.

Biosolids Management Demands All-Around Attention   Water Engineering & Management September 1994   John Nelson and Peter Wernsdorfer