Method for the inactivation of cryptosporidium parvum using ultraviolet light
AssigneeCalgon Carbon Corporation
InventorsJames R. Bolton, R. D. Samuel Stevens, Bertrand Dussert
Life of this patent
Estimating the term…
Abstract
A method for the inactivation of Cryptosporidium oocysts, Giardia cysts and similar organisms comprising irradiating water with ultraviolet light in doses of from about 1 mJ/cm2 to about 175 mJ/cm2.
Claims14
A method for the prevention of infection from cryptosporidium oocysts found in drinking water comprising irradiating said water with continuous ultraviolet light having predominant wavelength bands that falls within about 200 nanometers to about 300 nanometers with a dose of from about 1 mJ/cm2 to about 175 mJ/cm2.
A method for the prevention of replication of cryptosporidium oocysts or giardia cysts in drinking water treatment comprising irradiating said water with a continuous source of light having predominant wavelength bands that falls within about 200 nm to about 300 nm and a dose of from about 1 mJ/cm2 to about 175 mJ/cm2.
A method of treating drinking water containing contaminants including cryptosporidium comprising exposing said water to a continuous broad band of ultraviolet radiation with a dose of about 1.0 mJ/cm2 to about 175 mJ/cm2, wherein said exposing step is the sole process for rendering cryptosporidium in said drinking water noninfectious.
Dependencies are inferred from the claim text.