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Achromobacter sp. strain for degradation of polycyclic aromatic hydrocarbon organic pollutants and application thereof

A technology of organic pollutants and Achromobacter, which is applied in the field of environmental organic pollutant restoration and treatment, can solve problems that threaten human health, reduce crop yield, and PAHs accumulation, and achieve the effect of efficient and rapid degradation ability

Active Publication Date: 2014-10-15
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, PAHs pollution in soil will destroy the soil ecological environment, affect soil productivity, and reduce crop yield; at the same time, it will lead to the accumulation of PAHs in agricultural products, which directly threatens human health

Method used

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  • Achromobacter sp. strain for degradation of polycyclic aromatic hydrocarbon organic pollutants and application thereof
  • Achromobacter sp. strain for degradation of polycyclic aromatic hydrocarbon organic pollutants and application thereof
  • Achromobacter sp. strain for degradation of polycyclic aromatic hydrocarbon organic pollutants and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1W143

[0021] The isolation and identification of embodiment 1W143 bacterial strain

[0022] The long-term oil-contaminated soil from Qianjiang Jianghan Oilfield in Hubei was used as the screening soil. The specific screening scheme is as follows:

[0023] 1) Take 10g of soil, add it to the inorganic salt medium MSM without carbon source, and then add Phenanthrene to make the final concentration 100mg / L; culture with shaking at 28°C for 5 days, and then inoculate with 5% into the corresponding fresh medium; transfer 5 times in succession;

[0024] 2) Take 0.1ml of the enriched culture solution, spread it on the MSM solid plate containing phenanthrene, and after static culture at 28°C for 5 days, transfer the colonies grown on the plate to the plate containing phenanthrene, and continue to grow; then Select fast-growing colonies for plate streak purification;

[0025] 3) Pick stable growing colonies, inoculate them into MSM medium containing 100 mg / L phenanthrene, culture them with ...

Embodiment 2W143

[0029] Degradation characteristics of polycyclic aromatic hydrocarbons in embodiment 2W143 bacterial strain

[0030] The inventors conducted research on the ability of the W143 strain to degrade common polycyclic aromatic hydrocarbons. Based on the MSM medium without carbon source, add different polycyclic aromatic hydrocarbons as the sole carbon source, so that the final concentration is 100 mg / L; then inoculate the W143 culture in logarithmic growth phase with 1% inoculum , placed at 28°C for 5 days with shaking culture, measured the OD of the culture 600 absorbance value. The medium without any carbon source was used as negative control. Since no carbon source other than polycyclic aromatic hydrocarbons was added to the medium, the growth rate and biomass of the strain reflected the ability of the strain to utilize and degrade polycyclic aromatic hydrocarbons.

[0031] Such as figure 2 As shown, W143 has the maximum utilization ability for phenanthrene, and has strong ...

Embodiment 3W143

[0032] The degradation characteristics of embodiment 3W143 bacterial strain to phenanthrene

[0033]In order to further analyze the degradation characteristics of the W143 strain provided by the present invention to polycyclic aromatic hydrocarbons, the inventor tested the growth rate and degradation rate of the W143 strain with phenanthrene as the sole carbon source. The W143 strain in the logarithmic growth phase was inoculated with 1% inoculum into the MSM medium with 500 mg / L phenanthrene as the sole carbon source, and cultured with shaking at 28°C. Meanwhile, measure the OD of the culture every 12 hours 600 value and concentration of residual phenanthrene.

[0034] Such as image 3 It was shown that W143 bacteria had the ability to degrade phenanthrene from the beginning of inoculation, and the degradation ability and strain growth increased rapidly after 12 hours, and, as the residual phenanthrene concentration in the culture decreased, the growth of the strain gradual...

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Abstract

Belonging to the bioremediation field of organic pollutants, the invention specifically discloses an Achromobacter sp. strain W143. The strain is preserved in China Center for Type Culture Collection with a preservation number of CCTCC NO:M2014154. The strain disclosed by the invention has efficient and fast degradation ability to phenanthrene, naphthalene, fluorene, fluoranthene and other organic pollutants. The strain also has wide pH value, salinity and temperature adaptability, and is an excellent material for bioremediation of soil or environmental polycyclic aromatic hydrocarbon organic pollutants.

Description

technical field [0001] The invention belongs to the field of restoration and treatment of environmental organic pollutants. Specifically, it relates to an Achromobacter strain used for degrading polycyclic aromatic hydrocarbon organic pollutants and its application. Background technique [0002] Polycyclic aromatic hydrocarbons (Polycyclic Aromatic Hydrocarbons, PAHs) are a class of organic compounds containing two or more benzene ring structures. Stable, and become typical persistent organic pollutants. PAHs have "carcinogenic, teratogenic, and mutagenic" effects, and have great potential harm to environmental ecological safety and human health. Since the 1980s, environmental protection bureaus around the world have listed PAHs as priority monitoring pollutants in the environment. PAHs in the environment mainly come from petroleum production and transportation, petroleum refining, organic industry, fossil energy combustion, vehicle exhaust emissions, etc.; natural volcan...

Claims

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Application Information

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IPC IPC(8): C12N1/20B09C1/10A62D3/02C12R1/025A62D101/26
Inventor 陈雯莉黄巧云汪方奎李偲王少一
Owner HUAZHONG AGRI UNIV
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