Amino acid composite biomembrane remover

A biofilm stripping agent, amino acid technology, applied in biocides, animal repellents, plant growth regulators, etc., can solve problems such as difficult to suppress the environment, pollution, waste of resources, etc., to overcome environmental pollution, low cost, and materials convenient effect

Active Publication Date: 2014-04-23
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The task of the present invention is to provide an amino acid composite biofilm stripping agent to overcome the problems of a series of environmental pollution and waste of resources caused by existing industrial fungicides that are difficult to inhibit microorganisms under the biofilm

Method used

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  • Amino acid composite biomembrane remover
  • Amino acid composite biomembrane remover
  • Amino acid composite biomembrane remover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Amino acid, quaternary ammonium salt and solvent are compounded and mixed according to Table 1 and act on free SRB. And compared with simple quaternary ammonium fungicide. Use the unique dilution method to carry out according to the method specified in SY / T5890-1993, and the measurement conditions are as follows.

[0019] Inject the bactericide into the water sample at room temperature and sterilize for 3 hours. The sterilized water sample and the blank sample were injected into the test bottle, and incubated in a 37°C incubator. The experiment adopts the 3-tube method. The sterilization rate was calculated using the following formula:

[0020]

[0021] Table 1 The bactericidal ability of several formulations of composite biofilm strippers to free SRB

[0022]

[0023]

[0024] It can be seen from Table 1 that the addition of amino acids will not affect the bactericidal ability of the fungicide on free bacteria, and the bactericidal efficiency of the amino ...

Embodiment 2

[0026] Inhibitory Ability of Amino Acid Compound Biofilm Stripping Agent to Bacteria in Biofilm

[0027] The amount of bacteria under the biofilm is much higher than that in the free medium. In order to evaluate the inhibitory ability of the composite biofilm stripping agent to SRB under the biofilm, the test piece with mature SRB biofilm was cultivated in the laboratory, and compared with the four groups in Table 1. After the sub-agents were exposed for 4 hours, the number of bacteria in the biofilm was detected by the extinction dilution method. The results are shown in Table 2.

[0028] Table 2 The bactericidal ability of several formulations of composite biofilm strippers to free SRB

[0029]

[0030] It can be seen from Table 2 that the number of bacteria under the biofilm is much more than that in the free medium. After adding the amino acid composite biofilm stripping agent, the ability to inhibit the bacteria under the film is better than that of a simple fungicide...

Embodiment 3

[0032] Electrochemical Evaluation of Biofilm Stripping Ability of Amino Acid Composite Biofilm Stripping Agent

[0033] Electrochemical AC impedance technology is used to evaluate the stripping effect of fungicides on biofilm. The principle is that the surface of carbon steel material is a multi-layer complex structure composed of loose biofilm layer and dense corrosion product layer. By applying alternating current of different frequencies, Obtaining information such as the capacitance and resistance of the biofilm on the carbon steel surface can indirectly evaluate the stripping effect of the fungicide on the biofilm. The experiment adopts a three-electrode system. The test piece covered with biofilm after being in contact with different samples for 12 days is used as the working electrode, the saturated calomel electrode is used as the reference electrode, and the platinum electrode is used as the auxiliary electrode. EIS spectrum. 3% NaCl solution was used as the experime...

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Abstract

The invention relates to the fields of bactericide and biomembrane remover. The amino acid composite biomembrane remover provided by the invention comprises: one or a plurality of amino acid components and traditional non-oxidation type quaternary ammonium salt bactericide and solvents, which are compounded, wherein, the weight percentage of amino acid in the composite biomembrane remover is 1-10%, and the amino acids comprise one or two types of D-tyrosine or L-tyrosine; the weight percentage of the quaternary ammonium salt bactericide in the composite biomembrane remover is 40-49%; the weight percentage of the solvent is 41-59%. The composite biomembrane remover changes effect approach of the traditional bactericide for bacteria under biomembrane, and substantially promote inhibition of the quaternary ammonium salt bactericide for the bacteria under biomembrane as well as removing capability for biomembrane, and the material is easily and conveniently available, and the composite biomembrane remover has wide application values for removing biomembrane and controlling biomembrane corrosion in the industrial circulating water, oil field produced water, vessel cabin and other closed systems.

Description

technical field [0001] The invention belongs to the field of bactericides and biofilm strippers, and specifically relates to an amino acid composite biofilm stripper for biofilm stripping and corrosion control in closed systems such as industrial circulating water, oil field produced water, and ship cabins. Background of the invention [0002] Studies have shown that problems such as microbial corrosion, related scaling and biological slime are mainly closely related to the biofilm on the equipment pipeline and surface. [0003] Bacterial biofilm refers to a membrane-like multi-bacteria complex composed of bacterial cells and their secreted water-containing polymeric matrix (mainly exopolysaccharide) formed by attaching to the surface of objects during the growth process. Bacterial biofilm is a special form of existence formed by bacteria to adapt to the natural environment. It is a form of existence corresponding to wandering cells. Most bacteria have gradually formed a fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N37/44A01P1/00A01N33/12
Inventor 刘宏芳秦双陈碧顾停月
Owner HUAZHONG UNIV OF SCI & TECH
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