Claims
- 1. A composition for inhibiting the growth of microorganisms comprising effective amounts of peracetic acid and a non-oxidizing biocide selected from the group consisting of 2-methyl-4,5-trimethylene-4-isothiazolin-3-one and 2-(thiocyanomethylthio)benzothiazole.
- 2. The composition of claim 1 wherein the amount of peracetic acid ranges from approximately 5 to 250 ppm and the amount of non-oxidizing biocide ranges from approximately 10 to 250 ppm.
- 3. A method for controlling the growth of microorganisms in industrial process water comprising the step of administering a sufficient amount of a peracetic acid and a sufficient amount of a non-oxidizing biocide selected from the group consisting of 2-methyl-4,5-trimethylene-4-isothiazolin-3-one and 2-(thiocyanomethylthio)benzothiazole to the industrial process water to inhibit the growth of the microorganisms.
- 4. The method of claim 3 wherein the industrial process water is selected from the group consisting of water of a pulp and paper mill system, cooling water and mining.
- 5. The method of claim 3 wherein the peracetic acid and the non-oxidizing biocide are added in a ratio from about 10:1 to 1:25.
- 6. The method of claim 3 wherein the amount of peracetic acid added ranges from approximately 5 to 250 ppm and the non-oxidizing biocide ranges from approximately 10 to 250 ppm.
- 7. The method of claim 3 wherein the microorganisms contain bacteria.
- 8. The method of claim 3 wherein the microorganisms contain fungi.
- 9. The method of claim 3 wherein the peracetic acid is added to the industrial water prior to the addition of the non-oxidizing biocide.
BACKGROUND OF THE INVENTION
1. Reference to Related Patent
The present application is a continuation-in-part of application Ser. No. 08/559,685, filed Nov. 15, 1995, by Judy G. LaZonby, Robert E. McCarthy and Nancy L. Casselman, entitled "Method and Composition For Inhibiting Growth of Microorganisms Including Peracetic Acid and a Non-Oxidizing Biocide", now U.S. Pat. No. 5,658,467, which is in turn a continuation-in-part of application Ser. No. 08/350,570, filed Dec. 7, 1994, now U.S. Pat. No. 5,494,588 and issued Feb. 27, 1996 to Judy G. LaZonby, entitled "Method and Composition For Inhibiting Growth of Microorganisms Including Peracetic Acid and a Non-Oxidizing Biocide", which is a continuation-in-part of application Ser. No. 08/102,286, filed Aug. 5, 1993, by Judy G. LaZonby, entitled "Method and Composition for Inhibiting Growth of Microorganisms Including Peracetic Acid and a Non-Oxidizing Biocide", now abandoned, the disclosures of which are incorporated herein by reference.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5200189 |
Oakes et al. |
Apr 1993 |
|
5494588 |
LaZonby |
Feb 1996 |
|
Continuation in Parts (3)
|
Number |
Date |
Country |
Parent |
559685 |
Nov 1995 |
|
Parent |
350570 |
Dec 1994 |
|
Parent |
102286 |
Aug 1993 |
|