Ultrafiltration Basics

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.

Deck: 

The application of membrane technology

About The Author: 

Lynn Cotterill graduated from Liverpool J.M. University with a BSc Honors degree in chemistry. She recently moved to the U.S. and works for NWW Acumem Inc., Carlsbad, California.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10354

Cost-Effective Treatment for High Quality Water Sources: Extreme/High-Rate Serial Filtration

Pilot tests have demonstrated that EHRSF can meet Surface Water Treatment Rule requirements.

Deck: 

Filtration

About The Author: 

Craig M. Thompson was the process design engineer on the pilot testing project for the Humboldt Bay Municipal Water District. Thompson is registered as a Professional Engineer (P.E.) in California and is an Environmental Engineer with Kennedy/Jenks Consultants in San Francisco, California.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10270

Coagulation and Filtration Performance Optimized With Liquid Borne-Particle Counters

No longer are turbidimeters the sole measurement method for water purity levels.

Deck: 

Measurement

About The Author: 

Kent Horrell is an Engineer and Tony Sweazy is an Associate Chemist with Louisville Water, Louisville, Kentucky.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10271

Pulsed-Bed Sand Filters Meeting California Requirements

Wastewater is being reclaimed for non-potable uses. The use of this water is alleviating water shormance of the valve.

In addition, buried manually-actuated valves are easier to design and install if the operating valve shaft is horizontal and the gearbox input shaft is oriented toward the ground surface.

One concern with orienting the valve shaft axis horizontally is hydrostatic torque. Hydrostatic torque is a sizable operating torque component on large valves.

Deck: 

Reuse

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10248

Membrane Applications in Water Plants

Faced with upgrading aging facilities, a Florida water utility decided to incorporate reverse osmosis.

Deck: 

System Profile

About The Author: 

Ian Lisk is Editorial Director of Water Engineering & Management and Water & Wastes Digest. Significant input to this article was provided by staff at Metcalf & Eddy's Sunrise, Florida office, and at the City of Plantation, Florida.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10221

The Importance of Filtration in Wastewater Reclamation

As the discharge requirements for treated secondary effluent become more restrictive, effluent filtration is becoming a more integral part of secondary treatment. Because a high quality effluent is produced after filtration, the potential for reusing treated effluent is being examined by a number of municipalities, especially those in the water-short areas of the southwestern United States. A new concept of filtration in reuse applications and an innovative filter technology is being used to help alleviate some of these problems.

Deck: 

Effluent filtration is an integral part of secondary treatment as discharge requirements become more restrictive

About The Author: 

George Tchbanoglous and Onder Caliskaner are with the Department of Civil and Environmental Engineering at the University of California-Davis.

Publication Date: 
December 28, 2000
Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10234

Control System for Odorous Emissions From Rock Media Trickling Filters

The South Monmouth Regional Sewerage Authority's 9-mgd wastewater plant had been identified as a source of odors that bothered neighbors from time to time. As a result of work done on the plant's two trickling filters, which were shown to be the culprits generating the unpleasant odors, emissions from the filters have been significantly reduced and complaints of odors have been virtually eliminated.

Deck: 

Odor control

About The Author: 

Manuel Ponte, P.E., is vice president of Jacobs Environmental, Inc., Piscataway, New Jersey, and M. Boyd Miller, P.E. is executive director of South Monmouth Regional Sewerage Authority, Wall Township, New Jersey.

Publication Date: 
December 28, 2000
Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10204

Automated High Rate Filters Improve Performance, Reduce Costs

A Philadelphia water company improved the performance of and reduced the operating costs of its filtration system with modernized high-rate gravity filters.

Deck: 

Filtration Systems

About The Author: 

Morrison Coulter is vice president of production for the Philadelphia Suburban Water Company.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10206

Distributed Control System Offers Local & Central Access

Located near Springfield, Massachusetts, the West Parish Filter Plant has a history of planned growth to meet area water supply requirements. By the late 1960s, demand projections to the year 2020 showed a need for plant capacity to increase to around 100 million gallons per day. This was met by construction of a new 60-mgd direct filtration plant that incorporates rapid sand filtration, and replacement of 8 of the 18 existing slow sand filters.

Deck: 

A 60-mgd direct filtration plant incorporates rapid sand filtration and replaces eight existing slow sand filters

About The Author: 

David Chapman, John O'Connor, and Michael Stroshine are plant operators at the City of Springfield's West Parish Filter Plant in Westfield, Massachusetts. Mitchell Greenwald is a senior systems engineer at Bailey Controls, a unit of Elsag Bailey Process Automation, Warminster, Pennsylvania.

Publication Date: 
December 28, 2000
Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10185

Planting Waste Process Includes Microfiltration

A metal plating business in Massachusetts has installed a pollution control system that treats the company's wastewater to the point that it is cleaner than most household wastewater.

Deck: 

A specialized pollution control system is used for pretreatment at a metal plating business in Massachusetts

About The Author: 

Michael Dineen, Jr., is president of Absolute Metal Finishing, Norwood, Massachusetts.

Publication Date: 
December 28, 2000
Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10176