The removal of impurities and contamination from water supplies or industrial chemicals is a process existing all over the world to varying degrees of sophistication. Filtration systems vary enormously according to location, the type of purification required and funding available.
An overview of various filtration methods and their applications
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.
This paper summarizes ozonation and by-product formation chemistry as well as ways to control by-product formation.
By replacing copper wiring and hardwired relays with fieldbus systems, this plant eliminated nuisance trips and outages.
As competition for limited water supplies increases, sea water treated by reverse osmosis will become more viable.
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.
"In four years, half of San Diego may be filling its glasses with tap water that once ran through its toilets."
Changing membranes in pressure vessels is easy with the proper tools
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.
The Joint Committee voted to remove the arsenic reduction claim from Standard 58 until a new test method is developed
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.