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Biological restoring method for contaminative soil and equipment therefor

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

Inactive Publication Date: 2005-01-26
SHENYANG INST OF APPLIED 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] Such as figure 1 As shown, the restoration facility of the present invention is a shed-like structure consisting of a ceiling 12 and a shed wall 11, which has rainproof performance, and a heap rotting pool 1 is arranged inside, on which is a pile of contaminated soil 10, and below the heap rotting pool 1 is set Anti-seepage layer 4, sprinkler head 2 is installed through running water pipe 3 above the 1 meter high place in the center of heap rot pool 1 (it can be convenient to replenish water, and can be used for spraying water at any time according to the requirements of water content in the test), wherein there are walls covered with The ventilation pipes 5 of the ventilation holes 7 are respectively arranged in parallel to the rotting pool 1; the ceiling 12 is covered with plastic cloth, and the ventilation pipe 5 is connected to the air blower 14 through the gas pipeline 9, and the ventilation pipe 5 in each heaping rot pool 1 is connected with the air blower 14. A g...

Embodiment 2

[0049] The difference from Example 1 is that in this example, the ground crude oil near the oil well of Shuguang Oil Production Plant and the polluted soil around the oil well are used. The crude oil is heavy oil with a density of 0.97g.cm -3 , the colloid + bitumen content is 35.7%, the wax content is 6.2%, and the viscosity is 3026.5mPa.s (50°C). The guest soil is collected from the uncontaminated soil far away from the oil well in this area, which belongs to the salinized meadow soil, and is transported to the test site by truck.

[0050] Grind the large lumps of oily soil, and pass through a 5mm sieve for the oily sludge and contaminated soil. The pretreatment soil preparation is as follows:

[0051] KB: 80kg of oil-contaminated soil was added to 20kg of guest soil (comparative example 1);

[0052] CK: 80kg of oil-contaminated soil was added to 20kg of guest soil and 1.36kg of urea and 0.5kg of superphosphate were added (comparative example 2);

[0053] F: Add 20kg fore...

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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 polluted soil remediation technology, in particular to a polluted soil bioremediation method and facility. Background technique [0002] Bioremediation of organic matter-contaminated soil includes petroleum-contaminated soil. At present, there are two main types: in-situ treatment and ex-situ treatment. The in-situ biological treatment method is to directly adopt bioremediation technology in the polluted area. This technology is suitable for large areas of lightly polluted soil. The cost is low, but the processing cycle is long because the environmental conditions are not easy to control. Ex-situ bioremediation technology is to transport contaminated soil to a specific engineering 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 A processing technology with broad applicati...

Claims

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Application Information

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Patent Type & Authority Applications(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 APPLIED ECOLOGY - CHINESE ACAD OF SCI
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