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Contaminated soil heterotopic biological repairing method and special processing installation thereof

A contaminated soil and bioremediation technology, applied in the field of contaminated soil remediation, can solve the problems of secondary pollution of the environment and groundwater, and achieve the effect of simple structure, fast speed and optimized process conditions

Inactive Publication Date: 2003-10-15
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, and plowing twice a week were used to treat for 183 days, and the concentration of crude oil in the soil dropped from 85g / kg to 16g / kg, and the degradation rate was 81.6%. It is bacteria, 2 strains of Pseudomonas and 1 strain of Xanthomonas. The nutrients are urea and potassium dihydrogen phosphate. Without special facilities, it is easy to cause secondary pollution to the environment and groundwater
The bioremediation technology of organic polluted soil has attracted more and more attention from environmental scientists in my country, but it is still only in the laboratory test and pilot test stage, and it has not been reported as an engineering-scale application, more standardized treatment technology and treatment facilities.

Method used

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  • Contaminated soil heterotopic biological repairing method and special processing installation thereof
  • Contaminated soil heterotopic biological repairing method and special processing installation thereof
  • Contaminated soil heterotopic biological repairing method and special processing installation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 As shown, the special treatment facility of the inventive method mainly comprises baffle plate 3, prefabricated bed 4, vent pipe 5, air vent 6, air passage 8, anti-seepage layer 9, reservoir 11, mixing tank 13, and described prefabricated The bed 4 is made of stainless steel, the steel plate is 20m long, 10m wide, and 10mm thick. It is used for stacking pre-treated polluted soil. The baffle 3 is used as the side wall and has a ceiling 1, wherein: the baffle 3 is vertically installed around the prefabricated bed 4. The wall is 1m high and made of iron plate material. There is a space between the baffles 3, and there is a reinforced fence on it, connected to the ceiling 1. Its function is to prevent the polluted soil and floating dust from polluting the surrounding environment, and the reinforced fence plays a role of reinforcement; the prefabricated bed 4 The bed body is provided with vent holes 6—fancy drilled holes with a spacing of 0.2m and a hole dia...

Embodiment 2

[0049] The difference from Example 1 is:

[0050] In this embodiment, the ground crude oil near a certain oil well in Shenyang Oil Production Plant and the polluted soil around the oil well are excavated. The crude oil type is high pour point oil, and its density is 0.87~0.88g.cm -3 , the colloid+bitumen content is 11.5~24.3%, the wax content is 32.1~34.3%, the viscosity is 6.31~6.18mPa.s (100 ℃), the truck transports to the processing site, puts into the mixing pool 13, and the pretreatment pollution Add 219kg (2.8%) of organic fertilizer to the weight ratio of 7.3 tons of soil, and 219kg (2.8%) of solid bacterial agent. After fully stirring and evenly stacking on the prefabricated bed 4, 15 piles of polluted soil piles are 8m long, 2m wide, and 0.38m high. strips, with an interval of 0.5m between piles 2 The vertical air hole 6 is inserted into the air pipe 5 . During the treatment, pH and moisture were adjusted and controlled at 6.8 and 18.1%, respectively. The physical ...

Embodiment 3

[0067] The difference from Example 1 is:

[0068] In this embodiment, the ground crude oil near a certain oil well in Ciyutuo Oil Production Plant and the polluted soil around the oil well are dug up. The type of crude oil described is heavy oil, and its density is 0.93~0.96g.cm -3 , the colloid+bitumen content is 21.5~33.9%, the wax content is 4.2~7.4%, the viscosity is 566.6mPa.s (100 ℃), the truck is transported to the treatment site, puts into the mixing pool 13, and the polluted soil is pretreated as described Add 346kg (3.8%) of organic fertilizer in the weight ratio of 8.6 tons, and 215kg (2.3%) of solid bacterial agent, fully stir and stack on the prefabricated bed 4, and pile up 15 piles of polluted soil with a length of 8m, a width of 2m, and a height of 0.45m. Strip shape, with a stacking interval of 0.5m 2 The vertical air hole 6 is inserted into the air pipe 5 . During the treatment process, pH and moisture were adjusted and controlled at 8.0 and 16.8%, respecti...

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Abstract

The present invention relates to biological restoring technology of polluted soil, and is especially one method of biological restoring method and apparatus for polluted soil. Polluted soil is mixedwith composite organic fertilizer in 2-5 wt%, solid bacterial agent in 1-5 wt% and water in 14-25 wt%, pH regulated to 6-8, conveyed to prefabricated bed, piled in bars and treated while some ventilating pipes are inserted and in conditions of maintaining humidity and ventilating until reaching the exhaust standard. The special treating apparatus includes prefabricated bed with baffles, ceiling and ventilating pipes installed vertically in the ventilating holes; water jets in the ceiling; ventilating duct and anti-permeating layer below the prefabricated bed; and mixing pond beside the prefabricated bed. The present invention may be used in engineering scale.

Description

technical field [0001] The invention relates to a polluted soil remediation technology, in particular to a polluted soil heterotopic bioremediation method and a special treatment facility. Background technique [0002] The bioremediation technology of contaminated soil is mainly divided into in-situ treatment and ex-situ treatment. The in-situ biological treatment method is to directly adopt the bioremediation technology in the polluted area; this technology is suitable for large areas of lightly polluted soil, and the cost is low, but due to Environmental conditions are not easy to control, so the processing cycle is long. 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 application prospects. ...

Claims

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Application Information

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IPC IPC(8): B09C1/10
Inventor 张海荣李培军郭书海马学军孙铁珩巩宗强姜昌亮贾宏宇张春桂
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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