Method for preventing replication in Cryptosporidium parvum using ultraviolet light

• US 6,129,893 A
• Filed: 05/13/1998
• Issued: 10/10/2000
• Est. Priority Date: 05/13/1998
• Status: Expired due to Fees

• Current Assignee: Calgon Carbon Corporation (Kuraray Company Limited)
• Original Assignee: Calgon Carbon Corporation (Kuraray Company Limited)
• Inventors: Stevens, R. D. Samuel, Bolton, James R.
• Primary Examiner(s): MCKANE, ELIZABETH L
• Application Number:
  US09/078,116
• Time in Patent Office: 881 Days
• Field of Search: 422/22, 422/24, 422/23, 422/186, 422/186.3, 210/748
• US Class Current: 422/23
• CPC Class Codes: C02F 1/32 with ultraviolet light
• CPC Class Codes: C02F 2201/326 Lamp control systems

Abstract

A method for prevention of cryptosporidium oocysts and similar organisms in water by irradiating the water with ultraviolet light in a range of 200 to 300 nm in doses of about 10 mJ/cm² to 175 mJ/cm².

Claims

1. A method for the prevention of cryptosporidium oocysts comprising irradiating water with a continuous broad band of ultraviolet light in doses of from about 10 mJ/cm² to about 175 mJ/cm 2.

2. A method as set forth in claim 1 wherein said broad band is a frequency of 200 to 300 nm using an UV lamp.

3. A method as set forth in claim 1 or 2 wherein said dose is about 20 mJ/cm² to about 30 mJ/cm².

4. A method as set forth in claim 1 wherein said broad band is a frequency of 200 to 300 nm using a medium pressure UV lamp.