Process and article for disinfecting water

Details Process and article for disinfecting water Process and article for disinfecting water

1994-12-15

1996-07-23

McCarthy, Neil

Liquid purification or separation

With means to add treating material

210764, 422261, 422277, 252175, 252176, C02F 150

Patent

active

055386296

ABSTRACT:
Disclosed is a process for disinfecting water which provides a visual indication after the disinfection is complete. First, the water to be disinfected is generally simultaneously intermixed with at least three items. The items are: (1) a disinfectant which is adapted to render harmless substantially all pathogens present in the water upon the disinfectant being intermixed with the water for a time period T.sub.k ; (2) a colorant; and (3) a material which can remove substantially all of the disinfectant and colorant from the water over a time period t.sub.r, where T.sub.r is greater than T.sub.k. Secondly, the water, disinfectant, colorant and the removing material are allowed to remain intermixed for a time period of T.sub.r or greater. At the end of the time period T.sub.r, substantially all pathogens in the water will be rendered harmless, substantially all of the disinfectant will be removed from the water and substantially all of the colorant will be removed from the water. As a result of the removal of the colorant, the water will become uncolored which will give the consumer a visual indication after the disinfection process is complete and the water is safe to drink. Articles for use in carrying out the process are also disclosed.

REFERENCES:
patent: 4039444 (1977-08-01), Bory et al.
patent: 4389311 (1983-06-01), LaFreniere
patent: 4505823 (1985-03-01), Klein
patent: 4707263 (1987-11-01), Nishimori et al.
patent: 5217626 (1993-06-01), Yahya et al.
Trade literature accompanying AccuFilter.TM. "The Straw", AccuFilter International, Inc., Beaverton, OR.
Trade literature accompanying POTABLE AQUA.RTM. Drinking Water Germicidal Tablets, Wisconsin Pharmacal Co., Inc., Jackson, WI.
The PUR EXPLORER, Outside Magazine, Aug. 1994, p. 117.
Skoog, West & Holler, Fundamentals of Analytical Chemistry, 5th ed., Saunders College Publishing, Fort Worth, TX, 1988, p. 780.

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