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Ex-situ-in-situ combined bioremediation method for high-concentration petroleum-contaminated soil

An oil pollution and combined biological technology, applied in the field of contaminated soil remediation, can solve the problems of unevenness, low remediation efficiency and long duration of in situ bioremediation technology, and achieve the effect of fertilizing soil and improving in situ remediation efficiency.

Active Publication Date: 2017-06-23
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the oil-contaminated soils in my country are characterized by relatively high salinity in soil, simple vegetation types, high concentration of oil pollution and uneven distribution in the soil, and complex forms of oil in the soil. The repair efficiency of in situ biotechnology
Especially when the concentration of oil pollution is higher than 2000mg / kg, in-situ bioremediation technology has low repair efficiency and takes a long time

Method used

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  • Ex-situ-in-situ combined bioremediation method for high-concentration petroleum-contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The ex-situ-in-situ combined bioremediation method for high-concentration petroleum-contaminated soil comprises the following steps:

[0045] Step 1, ectopic repair:

[0046] Add reed straw, initiator, leavening agent and high-efficiency oil-degrading bacteria to the polluted soil, and adjust the carbon-nitrogen ratio and water, and use forced ventilation static stacking for ex-situ repair. The specific operations are as follows:

[0047] (1) Storage yard design: according to the national standard HJ 2035-2013;

[0048](2) Forced ventilation design: U-shaped pipes with holes are laid on the bottom of the pile as the ventilation pipeline system, and the blower is used as the ventilation power system. Air-dried reed straw with a thickness of 3 cm is laid on the pipeline to ensure uniform air distribution; the ventilation The diameter of the hole opened on the pipe of the pipeline system is 5mm, the angle between each adjacent small hole is 180° and the distance is 20cm t...

Embodiment 2

[0069] The ex-situ-in-situ combined bioremediation method for high-concentration petroleum-contaminated soil comprises the following steps:

[0070] Step 1, ectopic repair:

[0071] Add reed straw, initiator, leavening agent and high-efficiency oil-degrading bacteria to the polluted soil, and adjust the carbon-nitrogen ratio and water, and use forced ventilation static stacking for ex-situ repair. The specific operations are as follows:

[0072] (1) Storage yard design: according to the national standard HJ 2035-2013;

[0073] (2) Forced ventilation design: U-shaped pipes with holes are laid on the bottom of the pile as the ventilation pipeline system, and the blower is used as the ventilation power system. Air-dried reed straw with a thickness of 4 cm is laid on the pipeline to ensure uniform air distribution; The diameter of the hole opened on the pipe of the pipeline system is 6mm, the angle between each adjacent small hole is 180° and the distance is 25cm to 30cm;

[007...

Embodiment 3

[0094] The ex-situ-in-situ combined bioremediation method for high-concentration petroleum-contaminated soil comprises the following steps:

[0095] Step 1, ectopic repair:

[0096] Add reed straw, initiator, leavening agent and high-efficiency oil-degrading bacteria to the polluted soil, and adjust the carbon-nitrogen ratio and water, and use forced ventilation static stacking for ex-situ repair. The specific operations are as follows:

[0097] (1) Storage yard design: according to the national standard HJ 2035-2013;

[0098] (2) Forced ventilation design: U-shaped pipes with holes are laid on the bottom of the pile as the ventilation pipeline system, and the blower is used as the ventilation power system. Air-dried reed straw with a thickness of 3.5 cm is laid on the pipeline to ensure uniform air distribution; The diameter of the hole opened on the pipe of the ventilation pipeline system is 5.5mm, the angle between each adjacent small hole is 180° and the distance is 22cm to...

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Abstract

The invention relates to an ectopic-in-situ combined bioremediation method of high-concentration petroleum contaminated soil, and belongs to the technical field of contaminated soil remediation. The ectopic-in-situ combined bioremediation method comprises the following steps: firstly, high-concentration petroleum contaminated soil is subjected to ectopic biological piling, so that the concentration of petroleum hydrocarbon in soil is reduced greatly; then a certain amount of the piled materials are returned to the field, so that the concentration of petroleum hydrocarbon in soil after field return is less than 2000mg.kg<1-> to meet the in-situ remediation requirement; finally, the remediation requirement is achieved after in-situ remediation. The ectopic-in-situ combined bioremediation method is combined skillfully so as to achieve the economical and efficient remediation effect.

Description

technical field [0001] The invention belongs to the technical field of contaminated soil remediation, and in particular relates to an ex-situ-in-situ combined bioremediation method for high-concentration petroleum-contaminated soil. Background technique [0002] Bioremediation technology is currently the most valuable and vital oil-contaminated soil remediation technology. However, most of the oil-contaminated soils in my country are characterized by relatively high salinity in soil, simple vegetation types, high concentration of oil pollution and uneven distribution in the soil, and complex forms of oil in the soil. The restoration efficiency of in situ biotechnology. Especially when the concentration of oil pollution is higher than 2000mg / kg, the in-situ bioremediation technology has low recovery efficiency and takes a long time. Therefore, how to overcome the deficiencies of the prior art is an urgent problem to be solved in the technical field of remediation of high-con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 成杰民任慧鲁成秀
Owner SHANDONG NORMAL UNIV
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