Reclaim Greenhouse Water

Reclaiming water in the greenhouse industry will soon be something the government will be mandating the growers in the industry to do, as more wells are becoming contaminated from nitrates and phosphorus levels are becoming a concern for public health.

Deck: 

Copper Ionization, Ozone Provide Effective Pythium Treatment

About The Author: 

Jeff Roseman is a CWS-I with the Water Quality Association. He is the owner of Aqua Ion Plus+ Technologies and has designed and developed ionization and ozone systems for use in the greenhouse and agriculture industries. With a background in chemistry and physics from studies at Purdue University in electrical engineering, he is poised and ready to help the industry find methods to control pathogens and disease. For more information he can be reached at jeff@aquaionplus.com. More information is available at www.aquaionplus.com.

Activation Date: 
October 12, 2001
Legacy
Legacy ID: 
12699

Ultraviolet

While UV disinfection is an effective way to deliver microbiologically safe water, understanding local regulations for its use can be more complicated than understanding how UV scrambles a microorganism’s DNA.

Deck: 

Unraveling Local Regulations

About The Author: 

Adam Donnellan is vice president of sales for Sunlight Systems. He represents the third generation of his family to be involved with UV water disinfection. He can be reached at adam@sunlightsystems.com

Activation Date: 
July 30, 2001
Files: 
Issue Reference: 
Legacy
Legacy ID: 
12467

Commercial, Industrial Ultraviolet Systems

In past articles, we discussed the benefits of ultraviolet (UV) disinfection as well as the many available options. In this article, we will focus on the available technologies and provide an overview of how these technologies are being applied in commercial and industrial applications.

Deck: 

Available technologies and their use in C&I applications

About The Author: 

Adam Donnellan is vice president of sales for Sunlight Systems. He represents the third generation of his family to be involved with UV water disinfection. He can be reached at adam@sunlightsystems.com.

Activation Date: 
June 11, 2001
Files: 
Legacy
Legacy ID: 
12395

Ultraviolet System Design

In the last issue, we reviewed ultraviolet (UV) disinfection as a suitable technology for treating biologically unsafe water supplies. In this article, we will focus on system design and understanding the many available options for residential and commercial applications.

Deck: 

Understanding Residential and Commerical UV

About The Author: 

Adam Donnellan is vice president of sales for Sunlight Systems. He represents the third generation of his family to be involved with UV water disinfection. He can be reached at adam@sunlightsystems.com

Activation Date: 
May 10, 2001
Files: 
Issue Reference: 
Legacy
Legacy ID: 
12355

Basic Essentials

The benefits of ultraviolet (UV) light in destroying waterborne diseases are well established. This article (part one in a continuing series) will focus on explaining the basic terminology associated with the technology.

Deck: 

Understanding Ultraviolet Terminology

About The Author: 

Adam Donnellan is vice president of sales for Sunlight Systems. He represents the third generation of his family to be involved with UV water disinfection. He can be reached at adam@sunlightsystems.com

Activation Date: 
May 9, 2001
Legacy
Legacy ID: 
12346

Oxidizing Arsenic III to Arsenic V for Better Removal

On June 22, 2000, the U.S. Environmental Protection Agency (EPA) proposed lowering the maximum contaminant level (MCL) for arsenic from 50 down to 5 micrograms/L (Federal Register, 2000).

About The Author: 

Dr. Dennis Clifford, P.E., is a professor of environmental engineering and chair of the Department of Civil and Environmental Engineering at the University of Houston. He has more than 30 years experience in teaching, research and consulting related to water and soil treatment. During the last 20 years, he and his students have extensively researched the subject of arsenic speciation, oxidation and treatment.

Ganesh Ghurye received his master’s degree in environmental engineering from the University of Houston, where he currently is a researcher in the area of water treatment. He has five years experience in developing arsenic treatment methods.

Activation Date: 
March 14, 2001
Files: 
Issue Reference: 
Legacy
Legacy ID: 
12210

Comparison of Ultraviolet Pilot Trial with Full-Scale Operation

This article offers a method for comparing the results of a UV pilot system with a full-scale UV system.

Deck: 

Disinfection Systems

About The Author: 

Ken Hartz, Ph.D., P.E., is an engineer with URS Greiner Woodward Clyde, Seattle, Wash.
 
Jeff Griffith works for the Midway Sewer District, Kent, Wash.

Activation Date: 
January 17, 2001
Files: 
Legacy
Legacy ID: 
11979

Choosing the Right Disinfection Technology for a Municipal Drinking Water Plant - Part 2

These profiles of various disinfection processes can help managers decide which process is best suited for their treatment plant.

Deck: 

Water Treatment

About The Author: 

Dr. Hubert Fleming is vice president of water purification solutions, Severn Trent Services, Inc., Fort Washington, Pa.

Wayne Huebner is general manager of Capital Controls Group, Severn Trent Services, Inc., Colmar, Pa. With headquarters outside Philadelphia, Pa., Severn Trent Services, Inc. is a provider of water purification products, laboratory and operating services and information technology solutions.

Activation Date: 
January 16, 2001
Files: 
Legacy
Legacy ID: 
11973

Choosing the Right Disinfection Technology for a Municipal Drinking Water Plant - Part 1

Managers of water treatment plants must be able to choose the right disinfection system to bring their plants into compliance with government regulations.

Deck: 

Regulations

About The Author: 

About the Authors:
Dr Hubert Fleming is vice president of Water Purification Solutions, Severn Trent Services, Inc., Fort Washington, PA.

Wayne Huebner is general manager of Capital Controls Group, Severn Trent Services, Inc., Colmar, PA. With headquarters outside Philadelphia, PA, Severn Trent Services, Inc. is a provider of water purification products, laboratory and operating services and information technology solutions.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11922

A New Look at Disinfection Byproducts in Drinking Water

The application of disinfectants in drinking water treatment for controlling microbial quality has drawbacks. These include the formation of potentially harmful disinfection byproducts (DBPs) that can be potential carcinogens (e.g., trihalomethanes [THMs] when chlorine is used as a disinfectant). The general equation is:

 

ÊÊÊNOM + Disinfectant -> DBP

ÊÊÊWhere NOM = Natural Organic Matter

About The Author: 

Dr. Taha F. Marhaba is assistant professor in the Department of Civil & Environmental Engineering and the New Jersey Institute of Technology (NJIT). He is involved in drinking water research, more specifically disinfection and disinfection by-products. His recent research accomplishments were the development of the spectral fluorescent signatures (SFS) method for rapid determination of natural organic matter fractions in water. He is a registered professional engineer in the states of New Jersey and Delaware.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11528