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Biological restoring method for contaminative soil and equipment therefor

A contaminated soil and bioremediation technology, applied in the field of contaminated soil remediation, can solve problems such as single experimental conditions, secondary pollution of the environment and groundwater, and inconvenient control, and achieve the effect of meeting survival needs, various environmental conditions, and preventing pollution

Inactive Publication Date: 2007-01-10
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Measures such as adding water, adding bacteria, adding slag, adding nutrients, plowing twice / week, etc., treated for 183 days, the soil crude oil concentration dropped from 85g / kg to 16g / kg, and the degradation rate was 81.6%. Bacteria are bacteria, 2 strains of Pseudomonas and 1 strain of Xanthomonas. The nutrients are urea and potassium dihydrogen phosphate. However, due to the lack of suitable treatment facilities, the effective control of experimental conditions is affected, and it is easy to cause damage to the environment. and secondary pollution of groundwater
In addition, the experimental conditions are single, and it is not easy to control

Method used

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  • Biological restoring method for contaminative soil and equipment therefor
  • Biological restoring method for contaminative soil and equipment therefor
  • Biological restoring method for contaminative soil and equipment therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] like figure 1 As shown in the figure, the restoration facility of the present invention is a shed-like structure composed of a ceiling 12 and a shed wall 11 and has rainproof performance. The anti-seepage layer 4, above the central 1 meter high of the heap rot pond 1, install the sprinkler 2 through the water pipe 3 (it can be convenient to replenish the water, and can be used to spray water at any time according to the requirements of the test on the moisture content). The ventilation pipes 5 of the ventilation holes 7 are respectively arranged in parallel to the composting tank 1; plastic sheets are laid on the ceiling 12, and the ventilation pipes 5 are connected with the blower 14 through the gas pipeline 9, and the ventilation pipes 5 in each composting tank 1 are connected to A gas control valve 8 is installed on the gas pipeline 9 between the blowers 14, and a total gas valve 15 is installed at the blower 14;

[0022] A gas flow meter 6 can be added between the ...

Embodiment 2

[0041] The difference from Example 1 is that in this example, the ground crude oil near the oil well in the Shuguang Oil Production Plant and the polluted soil around the oil well, the crude oil is heavy oil, and its density is 0.97g.cm. -3 , the content of gum+asphalt is 35.7%, the content of wax is 6.2%, and the viscosity is 3026.5mPa.s (50℃). The guest soil was collected from uncontaminated soil far from oil wells in the region, all belonged to salinized meadow soil, and was transported to the test site by truck.

[0042] Grind the large pieces of oily soil, and pass the oily sludge and polluted soil through a 5mm sieve. The preparation of pretreated soil is as follows:

[0043] KB: 80kg of oil-contaminated soil is added with 20kg of foreign soil (Comparative Example 1);

[0044] CK: 80kg of oil-contaminated soil was added with 20kg of foreign soil, 1.36kg of urea and 0.5kg of superphosphate were added (Comparative Example 2);

[0045] F: 80kg of oil-contaminated soil wa...

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Abstract

The invention relates to a recovery technology for contaminated soil, which concretely is a recovery method and appliance for contaminated soil. The method puts in fertilizer according to the weight of the contaminated soil, in the material, C:N:P=80-120:9-11:1-2, 1-5% solid bacteria agent and 14-25% water, the pH value is adjusted to 6-8, they are put into the pile corroding pool after being blended. The device is canopy type structure, in which there has a pile corroding pool, on which there is the contaminated soil piles, there has a penetration resisting layer under the pool, there has a water pipe for assembling nozzle above the pool, in the pool there also has ventilation pipe distributed with ventilation apertures, which are connected to the fan; there lays with plastic cloth on the canopy. The invention is easy to be controlled, and it has no contamination.

Description

technical field [0001] The invention relates to a contaminated soil remediation technology, in particular to a contaminated soil bioremediation method and facility. Background technique [0002] Bioremediation of organic matter-contaminated soil includes oil-contaminated soil. At present, there are mainly two types of in-situ treatment and ex-situ treatment. The in-situ biological treatment method is to directly use bioremediation technology in the contaminated area. This technology is suitable for large areas of lightly polluted soil. The cost is low, but the treatment cycle is long because the environmental conditions are not easy to control. Ectopic bioremediation technology is to transport contaminated soil to a specific project site for bioremediation. This method can ensure ideal conditions for biodegradation, so it has a good treatment effect on contaminated soil and can prevent the transfer of pollutants. It is regarded as a It is a processing technology with broad ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10
Inventor 李培军孙铁珩台培东马学军蔺欣巩宗强许华夏张海荣
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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