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Device and method for biologically repairing high concentration petroleum pollution soil

A technology for oil pollution and bioremediation, applied in the field of oil pollution treatment, to achieve high treatment efficiency, low petroleum hydrocarbon content, significant economic and social benefits

Inactive Publication Date: 2010-08-11
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to develop on-site bioremediation technology for high-concentration petroleum-contaminated soil, and to provide a highly efficient, economical, long-lasting and less disturbing environmental treatment scheme - a bioremediation device and method for high-concentration petroleum-contaminated soil, to overcome Shortcomings of existing technology

Method used

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  • Device and method for biologically repairing high concentration petroleum pollution soil
  • Device and method for biologically repairing high concentration petroleum pollution soil

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Experimental program
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Effect test

Embodiment 1

[0019] Collect about 4 cubic meters of high-oil soil (50g / Kg), first disperse the high-oil soil evenly, adjust the carbon-nitrogen ratio to 50 (C:N=50:1), and the pH value to 8.0, and then mix it with 2 times the volume of auxiliary materials As stockpiling material, the auxiliary material composition and its mixing ratio are straw: wood chips: coal ash = 1: 1: 0.5, and the humidity of the stockpiling material is adjusted to be 50%. Then lay the bottom ventilation layer, the gravel layer laying height 15cm, and the corn stalk layer, bean stalk layer, sawdust layer and massive cinder layer laying height are respectively 5cm. Then the uniformly mixed stockpiles are stacked above the bottom ventilation layer, and ventilation pipes are arranged at the same time, and the oxygen supply method combining natural ventilation and forced ventilation is adopted. After 80 days, the petroleum hydrocarbon content in the soil decreased to 9.6g / Kg, that is, the degradation rate was 80.8%. At ...

Embodiment 2

[0021] Collect about 4 cubic meters of high-oil soil (50g / Kg), first disperse the high-oil soil evenly, adjust the carbon-nitrogen ratio to 90 (C:N=90:1), and the pH value to 8.0, and then mix it with 1 volume of auxiliary materials As stockpiling material, the auxiliary material composition and its mixing ratio are straw: sawdust: coal ash = 1: 1: 0.5, and the humidity of the stockpiling material is adjusted to be 60%. Then lay the bottom ventilation layer, the gravel layer laying height 15cm, and the corn stalk layer, bean stalk layer, sawdust layer and massive cinder layer laying height are respectively 5cm. Then the uniformly mixed stockpiles are stacked above the bottom ventilation layer, and ventilation pipes are arranged at the same time, and the oxygen supply method combining natural ventilation and forced ventilation is adopted. After 40 days, the petroleum hydrocarbon content in the soil decreased to 21g / Kg, that is, the degradation rate was 58%. At this time, the s...

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Abstract

The invention relates to a biology repair of soil polluted by the petroleum with high concentration and the method thereof. The method is that gravel layer, corn stalk layer, soybean stalk layer, sawdust layer and cinder layer are laid from bottom in sequence to form the bottom gas ventilation layer, on the bottom gas ventilation layer the stacking is piled formed by mixing the high oil soil withthe supplement. The processing condition of the stacking is regulated and at least one ventilating pipe is arranged through the stacking. Considering the requirement for the forced ventilation, the ventilating pipe mouth extending from the gravel layer is connected with a blower. A sealing cover is arranged in the ventilating pipe mouth which extends from the top of the stacking body. The oxygen supply mode that combines the intermittent forced ventilation and natural ventilation is adopted. With simple process technique, low engineering and operation cost, less process time and high process efficiency, the method as a high efficient, economic and lasting treatment proposal which disturbs a little to the environment, thus finally gets the soil which contains low petroleum hydrocarbon content and is suitable for the seed to germinate and the plant to grow with the obvious economic and social profits.

Description

technical field [0001] The invention belongs to the technical field of oil pollution treatment, and in particular relates to a bioremediation device and method for high-concentration oil-contaminated soil. Background technique [0002] In the process of large-scale oil exploitation, transportation and processing, the ground crude oil produced by omission, blowout, oil pipeline leakage and other accidents has seriously polluted the soil environment. And under the scouring effect of rainfall, it spreads to the surrounding area with the surface runoff. Due to the special physical and chemical properties of petroleum, it seriously threatens the safety of the regional ecosystem, makes the ecosystem fragile, and causes great harm to human health. Therefore, it is imminent to remediate oil-contaminated soil and restore its ecological functions. [0003] The environmental problem of oil pollution is becoming more and more prominent, and has been widely concerned in the world. Ove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 高冬梅王震宇许颖李锋民
Owner OCEAN UNIV OF CHINA
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