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Microorganism control system and use thereof

A technology for controlling systems and microorganisms, which can be used in chemicals for biological control, botanical equipment and methods, biocides, etc., and can solve problems such as high toxicity, instability, and inability to effectively control microorganisms.

Active Publication Date: 2016-06-01
ECOLAB USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dichloramine and trichloramine are undesirable microbicides because they are less stable, highly volatile, and more toxic than monochloramine
However, the results showed that the addition of sulfuric acid and citric acid, while able to avoid the increase in system pH, also resulted in the microbicidal activity and biofilm removal of halogen-containing biocides and stabilized halogen-containing biocides such as hypochlorite Decreased or even lost ability to effectively control microorganisms

Method used

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  • Microorganism control system and use thereof
  • Microorganism control system and use thereof
  • Microorganism control system and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] This example demonstrates that when a stabilized halogen-containing bactericide is added to a stock (e.g., broke stock and white water stock), it results in an increase in the pH of the stock; and, when sulfuric acid or citric acid When adjusting the pH value of the halogen-containing bactericide, it will cause the halogen-containing bactericide to become unstable, and its available chlorine content will drop significantly. However, when using sulfamic acid to adjust the pH value of the halogen-containing bactericide, not only effectively avoid the fluctuation (that is, rise) of the pH of the halogen-containing bactericide and the slurry, but also make the halogen-containing bactericide remain stable, The available chlorine content does not change significantly (that is, does not decrease significantly), effectively maintaining the bactericidal effect of the halogen-containing bactericide.

[0060]Take the white water sample and broken paper sample from the paper mill, ...

Embodiment 2

[0081] The present embodiment confirms: when sulfuric acid is used to adjust the pH value of the halogen-containing bactericide (sodium hypochlorite) stabilized by ammonium sulfate, it will cause the halogen-containing bactericide to become unstable, and the content of its active component monochloramine is significantly reduced, and Undesirable by-products such as dichloramine are produced. However, when the pH of ammonium sulfate-stabilized halogen-containing fungicides was adjusted using sulfamic acid, the halogen-containing fungicides remained stable without significant changes in the content of the active ingredient monochloramine and without producing undesired side effects. products such as dichloramine.

[0082] As mentioned above, ammonium sulfate-stabilized sodium hypochlorite was prepared according to the ratio of available chlorine to ammonium sulfate molar ratio of 1:1 in sodium hypochlorite, and the available chlorine content of the used sodium hypochlorite was 1...

Embodiment 3

[0087] This embodiment confirms: when using sulfamic acid to adjust the pH value of halogen-containing bactericide, the biofilm removal ability of halogen-containing bactericide is enhanced, that is, sulfamic acid is to the biofilm removal ability of stable halogen-containing bactericide Has a synergistic effect.

[0088] The white water of the acidic papermaking process was taken from the paper mill, filtered, and its pH was measured to be 5.10. Add casein broth medium to the filtered white water sample, distribute to 24-well plates, and then shake and culture at 37°C at 150 rpm for 48 hours until biofilm is formed. Afterwards, the biofilm was gently rinsed with phosphate buffered saline and removed for later use.

[0089]The ammonium sulfate stabilized halogen-containing fungicide sodium hypochlorite was formulated as described in Example 2. The ammonium sulphate stabilized halogen-containing fungicide that is prepared is divided into two parts, one of which adds sulfamic ...

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Abstract

The invention relates to the field of microorganism control in the paper pulp and / or water treatment process in a papermaking technology, and concretely provides a microorganism control system. The system includes a first component and a second component which are separate, the first component comprises a stabilized halogen-containing bactericide (such as stabilized hypochlorite), and the second component includes a sulfamic acid reagent (such as sulfamic acid). The invention also provides a method for controlling microorganisms in the paper pulp and / or water treatment process in the papermaking technology. The microorganism control system is used in the method.

Description

technical field [0001] The present invention relates to the field of microbial control during pulp and / or water treatment in the papermaking process. More specifically, the present invention provides a microbial control system comprising a separate first component and a second component, the first component comprising a stabilized halogen-containing bactericide (e.g., stabilized hypochlorite salt), and the second component comprises a sulfamic acid reagent (eg, sulfamic acid). The present invention also provides a method for controlling microorganisms during pulp and / or water treatment in a papermaking process comprising the use of the microorganism control system of the present invention. Background technique [0002] Halogen compounds and stabilized halogen-containing compounds have been widely used in the control of microorganisms (such as bacteria) in pulp and water treatment processes in the papermaking process. For example, stabilized hypochlorite has been used to co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/22A01N25/00A01N59/02A01N59/00A01N43/64A01N41/06A01P1/00A01P3/00D21H21/36D21H21/38C02F1/50C02F1/66
CPCC02F1/50C02F1/76C02F1/766D21H17/11D21H21/02D21H21/04D21H23/08C02F2103/28C02F2303/04D21H21/36D21H21/38A01N59/00D21H17/09D21H17/66
Inventor 涂文利吕玉梅
Owner ECOLAB USA INC
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