Part one of this article appeared in the July issue and discussed microfiltration and utrafiltration. This article discusses nanofiltration and reverse osmosis.
Once considered a viable technology only for desalination, membrane processes are increasingly employed for removal of bacteria and other microorganisms, particulate material and natural organic material that can impart color, tastes and odors to the water.
Legionellosis, the disease caused by Legionella spc., is common, though most people would guess it is extremely rare. Outbreaks of Legionellosis, defined as a cluster of three or more cases in a single locale, occur regularly in the United States and much of the developed world. Outbreaks have been reported in Australia, Holland, Thailand, Japan, England and many other countries. In the U.S., the Center for Disease Control (CDC) receives reports of 1,000 cases of Legionellosis annually.
In today's laboratory environment, it is essential that pure water is available for numerous applications.
A new low cost technology for purifying arsenic contaminated groundwater assists the government of India in removing this slow but steady assassin from their midst.
System requires no electricity, treats 1,000 liters per day in West Bengal
How can someone protect himself from consuming water contaminated with Cryptosporidium or other microorganisms? One durable and competitively priced option is ceramic filters.Until recently, the United States was essentially a carbon filter market, in that chlorine, dirt, foul taste and odor were thought to be the only problems with drinking water. With the advent of the Cryptosporidium parvum outbreak in Milwaukee in 1993, the general public and water treatment dealers started to question the quality of municipally treated water and private wells.
New liquid phase-based processes to regenerate spent AC have been conducted. Two liquid processes, competitive adsorbate displacement and supercritical fluid (SCF) regeneration, will be discussed.
Beringer Wine Estates, St. Helena, Calif., improved filtration effectiveness in its diatomaceous earth (DE) unloading and winery waste filtration area by an automated bulk bag unloader and flexible screw conveyor.
An oily water treatment facility on the Sabine River near Port Arthur, Texas, was not in compliance and had a large inventory of wastewater on site.
For a long time, the commercial and industrial (C&I) markets have been accepted as one sector of the water industry. Although considered different from such other markets as residential, agricultural and wastewater, there is a large murky area when being separated from each other.
With the recent proposals to create standards for the C&I markets comes the question of whether C&I should continue as one sector or be severed into separate entities. If a separation is in order, should it be determined by the application, flow rate or size of the equipment?