Biology in situ renovation method for biomass strengthen mix contaminated soil of stone oil-salt

A technology for contaminated soil and bioremediation, applied in the restoration of contaminated soil, fungi, bacteria, etc., to achieve the effect of improving fertility, ensuring bioaccumulation, and improving remediation efficiency

Inactive Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0006] Aiming at the existing problems in the treatment of mixed petroleum-salt contaminated soil, the present i

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  • Biology in situ renovation method for biomass strengthen mix contaminated soil of stone oil-salt

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Embodiment 1

[0033] This experiment was carried out in 2006 in 11 mu of oil-salt-associated contaminated soil in Zhongyuan Oilfield, Puyang, Henan. Puyang is located in the northern part of Henan Province, with an average annual precipitation of 500mm to 600mm, which is a relatively dry area in Henan; the salt content of the contaminated soil used in the test is 4 to 10 times that of normal cultivated land, and the content of petroleum hydrocarbons in local areas exceeds 1%. Soil salinization is serious, and pH reaches 9.5 in local areas.

[0034] The harvested wheat straw is used as the biomass added for the treatment of oil-salt mixed contaminated soil.

[0035] The specific implementation steps are as follows:

[0036] (1) First, add P. chrysosporium according to the ratio of 20mg / kg wheat straw, 10 10 Add Pseudomonas aeruginosa that can degrade cellulose (the strain is from the China Ordinary Microorganism Culture Collection Center) at the ratio of individual / kg wheat straw; after mi...

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Abstract

The invention discloses an in situ biological repairing method of biomass strengthening petroleum -salt-mixed contaminated soil, which is to add biomass degradation agent into biomass, and then the biomass degradation agent is plowed and landfilled under plough horizon, water logging and salt washing are utilized to reduce soil salt content, and then petroleum hydrocarbon degradation bacteria agent is added to degrade petroleum hydrocarbon, The invention utilizes the biomass to interdict capillary salt uprise phenomenon possibly generated; carbohydrate substance generated by biomass degradation can be taken as a good quality carbon source of the petroleum hydrocarbon degradation bacteria agent, so as to accelerate the growth of the petroleum hydrocarbon degradation bacteria agent; lignin generated by the biological degradation can absorb petroleum hydrocarbon pollutant, to prevent being diffused in the water logging and salt washing, bio surfactant generated by microorganism in the petroleum hydrocarbon degradation bacteria agent can accelerate the digestion of the petroleum hydrocarbon pollutant and further be converted into carbon dioxide and water by the petroleum hydrocarbon degradation bacteria agent biology. The efficiency of the degradative petroleum hydrocarbon pollutant of the invention method is high, and the speed is quick.

Description

technical field [0001] The invention relates to an in-situ bioremediation method of biomass-enhanced petroleum-salt mixed polluted soil, which belongs to the restoration technology of polluted soil. Background technique [0002] Soil pollution caused by oilfield production is often accompanied by relatively serious salt pollution. Bioremediation of oil-contaminated soil by microbial degradation is a hot research topic at home and abroad. However, most petroleum hydrocarbon degrading bacteria cannot tolerate higher salt concentrations, and the presence of salt pollution greatly reduces the efficiency of petroleum hydrocarbon degradation. Therefore, the bioremediation of oil-contaminated soil often requires the treatment of salt pollution first. To restore the planting capacity of the polluted soil, the co-treatment of oil-salt mixed pollution must be achieved. [0003] Water leaching salt is a commonly used method to treat saline-alkali land, but with the evaporation of su...

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Application Information

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IPC IPC(8): B09C1/00B09C1/10B09C1/02C12N1/20C12N1/14
Inventor 刘铮张坤徐圆圆花秀夫张敏莲
Owner CHINA PETROLEUM & CHEM CORP
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