Petroleum pollution remediation method, petroleum hydrocarbon degradation agent and flora

A petroleum hydrocarbon degrading bacteria and petroleum pollution technology, which is applied in the field of environmental pollution control, can solve problems such as poor treatment effect, increased construction cost, and damage to soil structure properties, so as to reduce the demand for heat sources, increase degradation speed, and excellent catalytic activity. Effect

Pending Publication Date: 2021-08-03
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0004] Chemical treatment can remove petroleum hydrocarbon pollutants remaining in the soil quickly and at low cost, but for heavily oil-contaminated soil, its treatment effect is limited, for example, the treatment effect on polycyclic aromatic hydrocarbons is not ideal, and multiple additions A large number of oxidizing agents have problems such as destroying the structural properties of the soil and greatly increasing the construction cost
Microbial treatment is an important method to remove petroleum hydrocarbon pollution including polycyclic aromatic hydrocarbons. It has the advantages of complete degradation, simple process operation, and environmental friendliness. Aromatics processing cycle is too long and other issues
Therefore, both the chemical treatment method and the microbial treatment method have the problems of poor treatment effect, long cycle and high cost for high-concentration and high-molecular-weight petroleum hydrocarbon pollutants.

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  • Petroleum pollution remediation method, petroleum hydrocarbon degradation agent and flora

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Effect test

Embodiment 1

[0025] Embodiment 1 of the present invention provides a method for remediating oil pollution, the process of which is as follows figure 1 shown, including the following steps:

[0026] Step S11: Inject the petroleum hydrocarbon oxidation degradation agent into the petroleum-contaminated land.

[0027] Specifically, it may include firstly injecting the mixed solution of ferrous sulfate and citric acid into the oil-contaminated land; after determining that the pH value of the oil-contaminated land reaches the first set range, injecting the hydrogen peroxide solution into the oil-contaminated land.

[0028] The oxidative decomposition of hydrogen peroxide requires Fe 2+ Catalysis, and Fe 2+ The catalytic effect of the catalyst will be better at a suitable pH value, and citric acid can reduce the pH value of the reaction system, so inject the catalytic solution (ferrous sulfate and citric acid mixed solution) before injecting the oxidizing solution (hydrogen peroxide solution) ...

Embodiment 2

[0044] Embodiment 2 of the present invention provides an application example of a method for remediating oil-contaminated soil.

[0045] After removing the pollution source containing petroleum NAPL, the site is to repair and control the pollution of part of the groundwater of the pollution source. The main pollutants are petroleum hydrocarbons such as benzene, ethylbenzene and xylene, and the pollution range is 4000m 2 , the pollution depth range is near the groundwater surface, the vadose zone and unconfined aquifer with a thickness of 3-5m, and the groundwater restoration target is the third-class standard of groundwater quality, that is, the benzene concentration is less than 0.12mg / L.

[0046] Arrange the injection wells according to the pollution situation, use the pressure grouting pump to inject the mixed solution of ferrous sulfate and citric acid, and measure the pH change and Fe 2+ Concentration change, after reaching the pH condition of the oxidation reaction (pH v...

Embodiment 3

[0050] Embodiment 3 of the present invention provides an application example of another oil-contaminated soil remediation method.

[0051] The site pollution refers to the lower polluted soil after removing the solid waste containing oil sludge and waste residue. The soil pH ranges from 7.9 to 8.6, and the main pollutants are petroleum hydrocarbons, including aromatic hydrocarbons such as benzene and toluene, and polycyclic aromatic hydrocarbons such as naphthalene and benzopyrene. The scale of polluted soil is 28000m 3 , the concentration range of petroleum hydrocarbons is 20900-25000mg / kg, with an average of 23000mg / kg, of which the maximum concentration of benzene is 8.7mg / kg, and the maximum concentration of naphthalene is 181mg / kg; the repair technology adopts the ex-situ repair method combining oxidation and microorganisms, and the repair target According to the [Guideline value for soil pollution risk screening of construction land (second consultation draft)] the scre...

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Abstract

The invention discloses a petroleum pollution remediation method, a petroleum hydrocarbon degradation agent and a flora. The petroleum pollution remediation method comprises the following steps of injecting a petroleum hydrocarbon oxidative degradation agent into a petroleum pollution plot, and after determining that a set condition is met, injecting the petroleum hydrocarbon degrading bacterial liquid into the oxidized petroleum pollution plot. The method can comprehensively utilize chemical and microbial methods to realize deep degradation of petroleum hydrocarbon in petroleum pollution plots, and has the advantages of low energy consumption, low cost and no damage to the environment.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to a petroleum pollution restoration method, a petroleum hydrocarbon degradation agent and a bacterial group. Background technique [0002] Petroleum is one of the main energy sources of the modern economy. However, various leakage accidents in the process of oil exploration, mining, storage, transportation and use of oil products, as well as improper storage methods of solid waste in the production process have caused oil pollution to soil or water bodies to varying degrees. Petroleum pollution will destroy the soil structure. Petroleum pollutants will block the soil pores, reduce the water permeability and air permeability of the soil, change the carbon-nitrogen ratio and carbon-phosphorus ratio of soil organic matter, cause changes in the number of soil microorganisms and community structure, and destroy the soil micro-ecological environment; At the same ...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/10C09K17/48C09K17/14C12N1/20C12R1/01
CPCB09C1/08B09C1/10C09K17/48C09K17/14C12N1/20B09C2101/00
Inventor 李璐璐王利刚李洋铭翟勇温焕君高悦王文文张书畅杨慧萍徐文博尹伟隋宗津刘登峰
Owner BC P INC CHINA NAT PETROLEUM CORP
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