U.S. Water News Online
PITTSBURGH -- Calgon Carbon Corporation has been granted a
Canadian patent for controlling cryptosporidium in drinking water
using ultraviolet (UV) light. The company had been previously granted
patents for controlling cryptosporidium in the U.S. and the
Netherlands. It has also applied for patents in Asia, Australia,
Europe, and South America.
Cryptosporidium, a microscopic parasite present in almost all
surface waters, is highly resistant to traditional treatment methods
such as chlorination. Prior to Calgon Carbon's breakthrough
discovery, it was thought that very high doses of UV light were
required to kill cryptosporidium. Calgon Carbon's research discovered
that low levels of UV could be used to prevent the parasite from
Calgon Carbon's research was used to commercialize a reliable
barrier against viruses, bacteria, and parasites such as
cryptosporidium at a fraction of the cost of other treatment methods.
Also, the technology that does not produce disinfection by-products.
In addition to marketing, Calgon Carbon is licensing its patented
continuous wave UV technology to water producers on a
Bob O'Brien, senior vice president of Calgon Carbon, said, "We are
very pleased that the Canadian Intellectual Property Office has
recognized the significance of Calgon Carbon's groundbreaking
research and technology by granting our company a patent for
controlling cryptosporidium. Their action strengthens our leadership
position in the growing market for disinfection of drinking water
using ultraviolet light."
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