Membrane Filtration for Water and Wastewater

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.

Activation Date: 
December 28, 2000
Issue Reference: 
Legacy
Legacy ID: 
11283

Strategies for Minimizing Ozonation Byproducts in Drinking Water

This paper summarizes ozonation and by-product formation chemistry as well as ways to control by-product formation.

Deck: 

Water Disinfection

About The Author: 

Thomas Grosvenor is an environmental engineer with Foster Wheeler Environmental Corporation, Livingston, N.J. His focus has been directed toward the areas of process/project engineering, air permitting and pollution prevention.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11292

Fiber Optic Fieldbus Makes Connection at Sanibel Water Company Reverse Osmosis Plant

By replacing copper wiring and hardwired relays with fieldbus systems, this plant eliminated nuisance trips and outages.

Deck: 

System Architecture

About The Author: 

John Leiter is the electronics technician for the Island Water Association, Inc., Sanibel Island, Florida.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11248

Shoring Up Future Water Supplies with RO Sea Water Plants

As competition for limited water supplies increases, sea water treated by reverse osmosis will become more viable.

Deck: 

Reverse Osmosis

About The Author: 

Alan Smith is the general chairman of the International Water Conference. The 1998 International Water Conference will be held October 19-21, 1998 in Pittsburgh. For a complete program listing and registration information, please contact IWC Conference Manager Ruth Gregg at e-mail: conf@eswp.com; phone: 412-261-0710 ext. 11; or fax: 412-261-1606.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11203

Reverse Osmosis Used to Purify and De-nitrify Water in a Municipal Plant

Culligan International Company has been providing services to small municipalities since the 1970s, but in February of 1997 the company signed a $1.9 million contract with the city of Abilene, Kansas, to remove nitrates from the city's water system.


The overall cost of the project was estimated at $6 million. This marked the largest domestic municipal project for Culligan and led to the creation of a municipal markets division within the company.


Fertilizers used in this farming area raised nitrate levels in the water beyond those allowed by state law.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11079

Advanced Water Treatment Technologies May Bring Repurified Water to San Diego

"In four years, half of San Diego may be filling its glasses with tap water that once ran through its toilets."

About The Author: 

This article was written by Inge Bisconer of Osmonics Desal, Vista, California. Osmonics Desal is a leading manufacturer of spiral wound reverse osmosis, nanofiltration, ultrafiltration and microfiltration membranes for the residential, commercial, institutional and industrial marketplaces.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11044

Changing Reverse Osmosis Membranes

Changing membranes in pressure vessels is easy with the proper tools

About The Author: 

Dorothy Korszen, P.E., J.D., is the executive vice president of Environmental Products USA, Inc., a manufacturer of membrane systems and pressure vessels.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10524

Rethinking ANSI/NSF Standard 58

As the organization that develops and maintains the consensus standards for the point-of-use, point-of-entry drinking water treatment unit industry, it is sometimes difficult to admit that the standards development process is not always perfect. Sometimes, as was recently revealed by NSF during a complaint investigation, there is a provision in the current standard which may not be technically accurate.

Deck: 

The Joint Committee voted to remove the arsenic reduction claim from Standard 58 until a new test method is developed

About The Author: 

Nancy Culotta is general manager of the Drinking Water Treatment Units division of NSF Intl.

Publication Date: 
December 28, 2000
Activation Date: 
December 28, 2000
Files: 
Company Reference: 
Legacy
Legacy ID: 
10468

Microfiltration: How Does it Compare?

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.

About The Author: 

Thomas Muilenberg is an applications engineer specializing in the area of membrane systems with General Filter Company, a manufacturer of water and wastewater process equipment for municipal and industrial applications.

Publication Date: 
December 28, 2000
Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10467

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