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Sequential biological enhancement treatment method for severe oil-contaminated soil or oil sludge

A technology for oil pollution and bio-augmentation, which is applied in the restoration of polluted soil, biochemical equipment and methods, and methods based on microorganisms, etc. It can solve the problems of decreased number and activity of microorganisms, no increase of degradation rate, and increased repair costs. , to achieve significant degradation effect, improve degradation efficiency, and shorten the repair cycle.

Active Publication Date: 2016-09-07
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Bouchez and Patureau of the French-German National Environmental Technology Center have proved that improper use of enhanced microorganisms is likely to cause the microorganisms to die soon after inoculation, or cannot effectively repair the types of pollutants in the actual polluted environment. The degradation effect is often unsatisfactory
Even if these enhanced microorganisms are not swallowed up quickly, their degradation of pollutants will soon enter a plateau period, the degradation rate will no longer increase, and the number and activity of microorganisms will also begin to decline. Difficulty Guaranteeing Success of Restoration Strategies
In addition, Rodriguez, Pelaez, etc. proved that although the reseeding strategy in the bioaugmented remediation strategy improves the degradation efficiency of pollutants, the initial pollution level of the remediation is often low, and to a certain extent increases the actual pollution level. repair cost

Method used

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  • Sequential biological enhancement treatment method for severe oil-contaminated soil or oil sludge
  • Sequential biological enhancement treatment method for severe oil-contaminated soil or oil sludge
  • Sequential biological enhancement treatment method for severe oil-contaminated soil or oil sludge

Examples

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Effect test

Embodiment 1

[0041] Using the above-mentioned three kinds of bacteria to carry out sequential bioaugmentation treatment on heavily oil-contaminated soil, the specific method consists of the following steps:

[0042] (1) Put the heavily oil-contaminated soil collected near the oil well into the treatment pool, knock it out, and mix it evenly, with a particle size of about 30-40mm;

[0043] (2) Mix the cultured bacillus and acremonium fungal agent into the polluted soil, mix evenly, then add organic fertilizer and surfactant, add water to adjust the soil moisture, cover the surface of the treatment pool with a plastic film, and Appropriate amount of ventilation, weekly replenishment of water to keep the water content of the soil or oil sludge stable, at 15-35°C, on-site treatment for 20-40 days.

[0044] (3) Insert the Phanerochaete chrysosporium sequence into the polluted soil, mix evenly, cover the surface of the treatment tank with a plastic film, ventilate, replenish water to maintain th...

Embodiment 2

[0051] Using the above-mentioned three kinds of bacteria to carry out sequential bioaugmentation treatment on heavily oil-contaminated soil, the specific method consists of the following steps:

[0052] (1) Collect heavily oil-contaminated soil and place it in a treatment pool, crush it, and mix it;

[0053] (2) Insert the cultivated bacillus and acremonium into heavily oil-contaminated soil, mix well, then add organic fertilizer and surfactant, potassium dihydrogen phosphate, urea, add water until the moisture content of the soil or oil sludge reaches 15 ~30%, mix well, cover the surface of the treatment tank with a plastic film, ventilate, keep the moisture content of the soil or sludge stable, and treat at 15-35°C for 20-40 days;

[0054] (3) Get the same amount of bacillus and acremonium mold as in step (2), repeat the insertion into the soil after step (2), mix well, cover the surface of the treatment pool with a plastic film, ventilate, replenish water and stir Keep the...

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Abstract

The invention discloses a sequential biological enhancement treatment method for severe oil-contaminated soil or oil sludge. According to the method, a sequential biological enhancement remediation strategy is adopted; firstly, bacillus and acremonium striatisporum are inoculated; after treatment for a certain time, phanerochaete chrysosporium is inoculated, and the bacillus, the acremonium striatisporum and the phanerochaete chrysosporium are combined to act; and therefore, on-site remediation of the oil-contaminated soil or oil sludge is achieved, the degradation efficiency of the severe oil-contaminated soil or oil sludge is remarkably improved, and the remediation period is greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of remediation of heavily oil-polluted soil or oil sludge, and in particular relates to a new method for repairing and treating oil-polluted soil or oil sludge in an oilfield mining area by using microbial flora. technical background [0002] With the continuous increase of human demand for petroleum products, the amount of petroleum extraction is also increasing. In the process of adoption, once an oil spill accident occurs, it is very easy to cause pollution to the soil, sediment and water near the oil-producing area. The main types of oil-polluted soil include ground crude oil pollution produced in the process of oil exploitation; piles of oily slag, sludge, and garbage; soil pollution caused by oil extraction wastewater discharge; oil spill pollution; air pollution and vehicle exhaust emissions ( Combining with particulate matter in the atmosphere and settling into the soil to cause pollution); other so...

Claims

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Application Information

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IPC IPC(8): B09C1/10C12N1/20C12N1/14C12R1/07C12R1/645
CPCB09C1/10B09C1/105C12N1/14C12N1/20
Inventor 马小魁毛东霞李亭亭李郁宋双红
Owner SHAANXI NORMAL UNIV
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