April 2002
Volume 44 Number 4
 
Cover
Membrane Separation: Primary Factors Influencing RO Membrane Permeate Flow
by David H. Paul
Membrane water treatment involves applying water under pressure to a synthetic, semipermeable membrane to purify water by means of -- most often -- reverse osmosis...  read more
 
Features
New WQA President’s Report: Building Pathways to a Greater Association in 2002
by Robert B. Ruhstorfer, CWS-V
Bob Ruhstorfer, head of RainSoft/Division of Aquion Partners LP, Elk Grove, Village, Ill., is the 2002-2003 president of the Water Quality Association...  read more
 
Drinking Water, Microbiology and Home Defense
by Dale W. Griffin, MSPH, Ph.D.
Most of us don't give a second thought to drinking out of our home taps. We assume it poses little if any risk to our welfare. The reality is there is a risk...  read more
 
Microbial Waterborne Disease: Are We at Risk?
by Kristina D. Mena, MSPH, Ph.D.
Using USEPA recommended levels of acceptable risk for different pathogens, risk assessments for microbiological contamination in various water sources are vital to protect public health...  read more
 
Chlorine, Chloramine and Chlorine Dioxide Regulations in California
by Terry Macaulay and Loretta Trapp
The following is a clarification of new rules in California regarding disinfectants and devices that may remove them from drinking water...  read more
 
Meeting the New Arsenic Standard with a New Iron-Based Adsorbent Media: POU Applications
by Gary L. Hatch, Ph.D.
POU drinking water treatment units that utilize this new granular ferric hydroxide adsorbent can offer small community water systems an economical solution for effective removal of As III and As V, simultaneously, to meet the new USEPA arsenic standard...  read more
 
In the Aquarium with Ozone: A Matter of Living Clarity?
by John M. Overby
Unlike most water treatment applications, public aquariums need to preserve the many living organisms existing in the water. To that end, ozone has become a valuable alternative...  read more
 
Getting Ready for Spring: Water in an Emergency
by Chris Floyd
With spring come droughts, floods, tornadoes, mudslides -- and let's not forget hurricane season. Here are preparedness tips from the Tallahassee, Fla., chapter of the American Red Cross...  read more
 
Growth Alert: U.S. Cleans Up with Bioremediation Markets
by Karen Rasmussen
With groundwater contamination from contaminants such as MTBE and perchlorate, bioremediation and water treatment show great promise, says the Environmental Research Group manager of Frost & Sullivan...  read more
 
Web Exclusive
Columns
Viewpoint: European excursion into water market shows promise, some discord read more
 
POU/POE at Four International Shows in February: A Whole Lot of Water Between Paris and Atlanta read more
 
Drinking Water Dollars: Mergers & Acquisitions in the Water Industry, Part 2 -- Factors to Evaluate and How to Put a Deal Together read more
 
Carrying on the Blake Name: AquaAir Technologies of Murfreesboro, Tenn., Changes with the Times read more
 
World Spotlight: The Safe Water System -- A Household-Based Water Quality Intervention Program for the Developing World read more
 
Cruisin’ with Krudico’s Kruse read more
 
Water Softeners & Septic Tanks: A Compatible Combination? read more
 
Microbial Resistance to Disinfectants read more
 
Website of the Month: Airing It Out in Public, Stripping the Facts Bare on the Web -- Aeration & Air Stripping Online read more