Method for controlling growth of microorganisms and/or biofilms in an industrial process

Patent metadata

Field	Value
Publication number	US-11490621-B2
Application number	US-201816638769-A
Country	US
Kind code	B2
Filing date	Aug 28, 2018
Priority date	Aug 29, 2017
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

Disclosed is a method for controlling a biofilm, for removing a formed biofilm and/or for controlling a growth of microorganisms, preferably bacteria, in an aqueous environment of an industrial manufacturing process including cellulosic fibre material. In the method, a composition including a compound selected from a group consisting of 3-[(4-methylphenyl)sulphonyl]-2-propenenitrile and 4-amino-N-2-thiazolyl-benzenesulphonamide is administered to the aqueous environment of the process.

First claim

The invention claimed is:

1. A method for controlling a biofilm, for removing a formed biofilm and/or for controlling growth of bacteria belonging to a genus of Meiothermus, Deinococcus and/or Pseudoxanthomonas , either alone or in any combination, in an aqueous environment of an industrial manufacturing process comprising a cellulosic fibre material, wherein the aqueous environment comprises the said bacteria, or the aqueous environment is in contact with a biofilm formed by any of said bacteria and said method comprising administering to the aqueous environment of the process a composition comprising a compound selected from a group consisting of 3-[(4-methylphenyl) sulphonyl]-2-propenenitrilex and 4-amino-N-2-thiazolyl-benzenesulphonamide.

2. The method according to claim 1 , wherein the composition is administered to the aqueous environment in an amount of 0.01-100 ppm calculated as active compound.

3. The method according to claim 1 , wherein the composition is administered to the industrial manufacturing process comprising the cellulosic fibre material, which is selected from manufacture of paper, board, pulp, tissue, moulded pulp, non-woven or viscose.

4. The method according to claim 3 , wherein the aqueous environment comprises a residual of peroxide from about 0.01 to about 100 ppm.

5. The method according to claim 1 , wherein the cellulosic fibres are lignocellulosic fibres.

6. The method according to claim 1 , wherein the composition is administered periodically in the aqueous environment for 3-45 minutes for 6-24 times a day.

7. The method according to claim 1 , wherein the composition is used in addition to other biocidal or antimicrobial agents.

8. The method according to claim 7 , wherein the aqueous environment comprises a residual of active halogen in the range from about 0.01 to about 20 ppm, given as active chlorine.

9. The method of claim 2 , wherein the composition is administered in an amount of 0.01-10 ppm, calculated as active compound.

10. The method according to claim 9 , wherein the composition is administered in an amount of 0.01-2 ppm calculated as active compound.

11. The method according to claim 10 , wherein the composition is administered to the aqueous environment in an amount of 0.01-1 ppm calculated as active compound.

12. The method according to claim 10 , wherein the composition is administered in an amount of 0.01-0.5 ppm calculated as active compound.

13. The method according to claim 12 , wherein the composition is administered in an amount of 0.01-0.3 ppm calculated as active compound.

14. The method of claim 1 , wherein the aqueous environment comprises starch, inorganic mineral particles in form of fillers and/or paper coating materials, hemicelluloses, lignin and/or dissolved and colloidal substance.

15. The method according to claim 6 , wherein the composition is administered periodically in the aqueous environment for 10-30 minutes for 12-24 times a day.

16. The method according to claim 3 , wherein the industrial manufacturing process is manufacture of pulp, paper or board.

Assignees

• Kemira Oyj
• Univ Copenhagen

Inventors

• Simell Jaakko
• Kolari Marko
• Givskov Michael
• Tolker-Nielsen Tim
• Rybtke Morten Levin
• Andersen Jens Bo

Classifications

• D21H21/36 Primary

  Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents · CPC title

• D21C9/008 Primary

  Prevention of corrosion or formation of deposits on pulp-treating equipment (D21C9/08, D21H21/02 take precedence) · CPC title

• D21H17/09

  Sulfur-containing compounds · CPC title

• A01N43/78 Primary

  1,3-Thiazoles; Hydrogenated 1,3-thiazoles · CPC title

• A01N41/10

  Sulfones; Sulfoxides · CPC title