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Biostimulation method for remediation of oil-polluted soil

A technology for oil pollution and soil remediation, applied in the field of environmental remediation, can solve the problems of difficult oil-soil separation, achieve the effect of improving soil aeration, increasing water permeability and air permeability, and promoting the migration and conversion of substances and energy

Inactive Publication Date: 2011-01-19
SINOPEC PETROLEUM ENG DESIGN
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Problems solved by technology

[0003] Oil-contaminated soil can be repaired by using native petroleum hydrocarbon-degrading microorganisms in the soil. However, due to the combination of soil particles and petroleum pollutants, it is difficult to separate oil and soil. Without adding exogenous petroleum hydrocarbon-degrading bacteria, environmental factors The impact of these pollutants is more significant, thereby slowing down the degradation rate of these pollutants

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Embodiment Construction

[0022] The application effects of the present invention are further described below through examples, but the present invention is not limited.

[0023] The implementation process is as follows:

[0024] 1) First, the basic physical and chemical properties of the soil were measured. The average oil content of the oil-polluted soil was 2.89%, the soil viscosity was relatively high, the pH value was slightly alkaline, the total nitrogen content was 0.26g / kg, the water holding capacity was 5.51%, and the number of local hydrocarbon-degrading bacteria was 0.08×10 4 MPN, the salt content is 15.31g / kg;

[0025] 2) Crush the oil-contaminated soil from the surface to a depth of about 30cm, add 20g / kg of yellow sand to the soil, add 10g / kg of weed debris, add 15g / kg of organic fertilizer, apply 15g / kg of agricultural compound fertilizer, and 10g of agricultural water-retaining agent / kg, mix and mix the above conditioner with the soil;

[0026] 3) Turn the soil 1-2 times a week, and...

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Abstract

The invention discloses a biostimulation method for remediation of oil-polluted soil. In the method, on the premise of not adding an oil pollutant biodegrading bacterial agent, a soil conditioner is added to improve the soil environment, reduce soil stickiness, increase the soil permeability, adjust the water-retaining capacity of the soil, adjust inorganic and organic nutrients necessary for local microbe growth, maintain the pH value of the soil close to neutrality, promote oil pollutant degrading microbes in the soil to grow and propagate, and improve the oil pollutant degrading efficiency of the local microbes; by planting plants, the microenvironment of the soil near root systems of the plants is improved, the plants secrete organics with low molecular weight such as amino acid to the root systems so as to stimulate the massive propagation of the local microbes and indirectly promote oil pollutant degradation by the microbes of the root systems; and the biostimulation method has the advantages of accelerating the remediation of the oil-polluted soil and restoring the original state of the soil.

Description

1. Technical field [0001] The invention belongs to the technology of environmental remediation, in particular to a biostimulation method for remediation of petroleum-contaminated soil. 2. Background technology [0002] As the largest receptor in the environment, soil is a combination of organic and inorganic, containing a variety of petroleum hydrocarbon pollutants degrading microorganisms, so it has a strong buffer and self-repair ability for pollution. Before the soil is polluted by oil, its natural community structure or microbial population is not suitable for oil pollution; when the soil environment is polluted by oil, the microbial community structure will change, and the populations that can adapt to oil pollution continue to develop or can develop better Populations, these native microorganisms degrade petroleum pollutants while utilizing hydrocarbons in petroleum and its derivatives in the soil as their carbon and energy sources for growth and reproduction. A large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
Inventor 孙正贵张建祝威桂召龙董健史德青王田丽刘娜李毅
Owner SINOPEC PETROLEUM ENG DESIGN
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