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Biological bactericide for crude oil transportation pipelines, and applications thereof

A biological fungicide and transportation pipeline technology, applied in the field of environmental engineering, can solve the problems of difficult coating, unenvironmental protection and high cost, and achieve the effects of inhibiting microbial corrosion, improving corrosion resistance and avoiding drug resistance.

Active Publication Date: 2020-04-17
GUANGZHOU MARITIME INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult and costly to paint in crude oil transportation pipelines, and once damaged, it will accelerate the corrosion of metal materials
The use of fungicides in places where these fluids exist is one of the effective methods to inhibit microbial corrosion, but with the prolongation of use time, the killing efficiency of a single fungicide will drop significantly, and finally fail, the reason is that microorganisms will produce resistance Medicinal properties
In response to this phenomenon, a "cocktail therapy" has been developed, that is, the use of several mixed fungicides, but its cost is greatly increased, and it is not environmentally friendly

Method used

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  • Biological bactericide for crude oil transportation pipelines, and applications thereof
  • Biological bactericide for crude oil transportation pipelines, and applications thereof
  • Biological bactericide for crude oil transportation pipelines, and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation of embodiment 1 biocides

[0034] Take the alkanophagous bacteria stored in 2216E liquid medium containing 20% ​​glycerol at -80°C, thaw at 25°C, inoculate 1000 μl in 2216E liquid medium, and shake at 37°C at 120r / min Cultivate for 24 hours, obtain the bacterial liquid, and dilute the bacterial liquid to 1×10 8 CFU / ml, the biocide is obtained.

Embodiment 2

[0035] The inhibitory effect of embodiment 2 biological bactericides to corrosion bacteria

[0036] Get the biological fungicide prepared by 0.001kg embodiment 1 and dilute 500-1000 times and join in the postgate substratum, then add sulfate-reducing bacteria (SRB), the addition of sulfate-reducing bacteria (SRB) and the addition of fungicide Same, its ratio is 1:1. In this embodiment, an experimental group and a control group are set up. The experimental group contains both fungicides (Alkanophagous boku) and SRB, and the control group contains only SRB.

Embodiment 3

[0037] Two kinds of bacteria relative content and pH measurement in the embodiment 3 system

[0038] Take 50ml samples of the experimental group and control group in Example 2 on 1 day, 3 days, 5 days, 7 days, 9 days, 11 days, and 14 days respectively, and send them to Meiji Biological Company for biodiversity detection, and measure The pH values ​​of the two groups.

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Abstract

The invention provides a biological bactericide for a crude oil transportation pipeline, wherein the biological bactericide comprises the following main components: Alcanivorax borkumensis, has no pathogenicity, is less in dosage, simple and convenient to use and environment-friendly compared with conventional inorganic and organic bactericides, and belongs to an environment-friendly bactericide.According to the invention, the biological bactericide can improve the pH value in the environment and effectively inhibit the microbial corrosion of metals, wherein the corrosion rate of an X70 pipeline steel can be reduced by 200 times; the biological bactericide is non-corrosive, wherein the corrosion resistance is improved along with the prolonging of the soaking time of a metal sample; according to the principle of the biological bactericide, the pH value is changed, so that the biological bactericide is not suitable for the survival of other microorganisms, and the defect that the traditional bactericide is easy to generate drug resistance is avoided; the biological bactericide disclosed by the invention is used for metal protection of crude oil transportation pipelines, is simple tooperate, has no requirements on the size and the shape of the pipeline, and can greatly reduce the cost of inhibiting microbial corrosion of the pipeline in petroleum enterprises as long as fluid flows through.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a biological fungicide used for crude oil transportation pipelines and an application thereof. Background technique [0002] Metal materials used in the environment of crude oil transportation pipelines are facing serious microbial corrosion problems. According to statistics, the corrosion of metal materials related to microorganisms accounts for 70%-80% of the total amount of metal materials. In crude oil transportation pipelines, microbial corrosion More serious, the corrosion perforation caused by it often leads to large-scale crude oil leakage, pollutes the environment, causes fluctuations in crude oil prices, and affects the national economy and people's livelihood. The annual energy consumption and corrosion losses caused by microbial corrosion are as high as hundreds of billions of dollars. A large part of this is caused by sulfate reducing bacteria (SR...

Claims

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Application Information

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IPC IPC(8): A01N63/20A01N59/16A01P1/00
CPCA01N59/16
Inventor 尹衍升郭章伟刘涛郭娜
Owner GUANGZHOU MARITIME INST
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