Primary Coagulant Aid Outperforms Alum, Slashes Operating Costs

At a water treatment plant in Cleveland a primary coagulant aid slashed the operating costs.

Deck: 

At Work on Chemicals

Activation Date: 
October 19, 2001
Files: 
Legacy
Legacy ID: 
12710

Primary Coagulant Aid Outperforms Alum, Slashes Operating Costs

At a water treatment plant in Cleveland a primary coagulant aid slashed the operating costs.

Deck: 

At Work on Chemicals

Activation Date: 
October 19, 2001
Files: 
Legacy
Legacy ID: 
12709

Biofouling in Raw Water Supply Wells and Its Impact

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.

Deck: 

Membrane Concerns

About The Author: 

Frederick Bloetscher, P.E., is director of engineering, operations and planning for Public Utility Management and Planning Services, Inc. (PUMPS, Inc.), Dania Beach, Fla.

Gerhardt M. Witt, P.G., is the principal of Gerhardt M. Witt & Associates, Inc., West Palm Beach, Fla.

Robert E. Fergan, P.E., is an engineer with Hazen & Sawyer, Raleigh, N.C.

Activation Date: 
October 19, 2001
Legacy
Legacy ID: 
12706

Controlling Nitrification in a Water Distribution System Using Sodium Chlorite

Engineers set out to discover whether the direct addition of sodium chlorite to a water stream might be an effective nitrification control process.

Deck: 

Water Treatment

About The Author: 

Thomas L. O’Connor, BSEE, MBA, is project director, H2O’C Engineering, Columbia, Mo. e-mail: Tom@h2oc.com
 
Bart Murphy, BSCE, is superintendent of Water, Willmar (Minn.) Municipal Utilities.
 
John T. O’Connor, EngD, PE, is principal, H2O’C Engineering, Columbia, Mo. Phone: 877-22-WATER; e-mail: John@h2oc.com.
 

Activation Date: 
September 21, 2001
Legacy
Legacy ID: 
12646

Pipeline Rehab Survives the Elements

Projects rarely are easy. However, throw in a remote site, steep siphon, a limited number of access points, harsh winter conditions and environmental concerns and you have a daunting project.

Deck: 

Products At Work

Activation Date: 
August 22, 2001
Files: 
Legacy
Legacy ID: 
12549

Waterproofing the Montsouris Reservoir: Using Hydraulic Binders and Nonwoven Geotextiles to End Leaks

Leakage problems have plagued the reservoir since it entered service.

Deck: 

At Work on Coatings

Activation Date: 
August 22, 2001
Legacy
Legacy ID: 
12547

Evaluation of the Use of Crushed Recycled Glass as a Filter Medium: Part 2

Performance studies show that crushed recycled glass can provide capital and annual cost savings over traditional sand filter media.

Deck: 

Filtration

About The Author: 

Richard W. Elliott, P.E., is a civil engineer located in Cazenovia, N.Y.

Activation Date: 
August 22, 2001
Legacy
Legacy ID: 
12546

Upgrading Well Water Disinfection Systems

Disinfection systems treat one city's groundwater supply, allowing the city's aquifers to meet EPA and local water quality regulations.

Deck: 

Hypochlorite Generation

About The Author: 

Randy Walsh is superintendent of plant operations for the Albuquerque Water Utility Division (AWUD), Albuquerque, N.M.

Activation Date: 
August 22, 2001
Legacy
Legacy ID: 
12545

August 2001 Editor's Desk

Water Matters! was the slogan of a rally dedicated to communicating the importance of safe and clean drinking water and securing support for promoting water issues with government leaders.

Deck: 

Rally Cry

About The Author: 

Bill Swichtenberg is the Editorial Director of Water Engineering & Management and Water & Wastes Digest.

Activation Date: 
August 22, 2001
Legacy
Legacy ID: 
12543

New Technology Desalinates Sea Water at 80 Percent Less Cost than Current Methods

Demand for a cheaper way to transform saltwater into fresh has spurred the development of a new technology by AquaSonics International, Inc., the Rapid Spray Distillation (RSD) process, that desalinates water at a fraction of the cost of current methods.

Deck: 

Products at Work

Activation Date: 
August 9, 2001
Files: 
Legacy
Legacy ID: 
12530