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.
Understanding Ultraviolet Terminology
The occurrence of Cryptosporidium parvum and other pathogens in water supplies poses a dangerous problem to the water industry and human health. Read about a new technology that is helping rid of this problem.
While temperature is acknowledged to be an important factor in water treatment, remarkably little study has been made of the adverse influence of low temperatures on physical treatment process effectiveness. An early study concluded that "there is no preventative or retarding effect on alum floc formation with low raw water temperatures."
Part 4: Microbiologically-Mediated Deterioration in Surface Water Supplies
This article offers a method for comparing the results of a UV pilot system with a full-scale UV system.
These profiles of various disinfection processes can help managers decide which process is best suited for their treatment plant.
Escherichia coli, a.k.a. E. coli. A terrible, but familiar word to the public suggests sewage or animal waste contamination. E.
Recent outbreaks of E. coli have brought consumer’s attention to their drinking water. Understanding its source, regulations and prevention will be key to combating this waterborne illness
Managers of water treatment plants must be able to choose the right disinfection system to bring their plants into compliance with government regulations.
There are more than 2,000 installations worldwide that use ozone to treat drinking water. Ozone is an effective disinfectant for treating municipal and industrial wastewater, enabling the end user to meet EPA pre-treatment standards.
An analysis of the raw well water (Table 1) shows a pH of 7.9 and 30 color units with >20 mg/L hydrogen sulfide, 5.6 mg/L iron and 0.6 mg/L manganese. Odor was detected at 10 threshold odor number (TON), indicative of the high hydrogen sulfide levels. To meet these water problems head-on, the homeowners formed the Bassi Ranch Mutual Water Co. in 1992.
Part one of this article appeared in the July issue and discussed microfiltration and utrafiltration. This article discusses nanofiltration and reverse osmosis.