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Method for bioremediation of crude oil polluted soil by utilizing plants and cryogel

A contaminated soil and bioremediation technology, applied in the restoration of contaminated soil, etc., can solve the problems of low degradation and removal rate of crude oil pollutants, unsatisfactory effect, and certain difficulties, and achieve industrial scale-up and easy application, reducing the repair process Cost, effect of improving survivability

Inactive Publication Date: 2019-10-01
陕西欧菲德环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the existing technology has a low degradation and removal rate for crude oil pollutants, and the repair period is long, so the effect is not ideal
In addition, for the in-situ remediation of oil-contaminated soil, it is difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put 1 kg of CSETIA-BR series starch compound crystal gel microbial restoration agent for immobilizing Rhodococcus and yeast into 1.25m 3 In the crude oil polluted soil, mix evenly in situ, and the oil content of the polluted soil is 4.8% (w / w, the same below) as detected by gravimetric method; add the compound fertilizer containing N, P, K, etc. required for plant growth and the microbial The required nutrients such as carbon source and nitrogen source substrate are 0.1 kg, and then flattened to form a mixed soil with a thickness of 20-30 cm; sow the seeds of Carnation double-petal in the mixed soil, supplement water to maintain the seeds germination; maintain suitable light and ventilation , moisturizing and other degradation conditions, the natural temperature is about 20~35 o C. Maintain plant growth and microbial metabolism; after one month of restoration, through the synergistic effect of plant growth and microbial degradation, the oil content of the polluted soil ...

Embodiment 2

[0028] Put 6 kg of CSETIA-BR series starch compound crystal gel microbial restoration agent for immobilizing Rhodococcus and yeast into 3 m 3 In the crude oil contaminated soil, mix evenly in situ, and the oil content of the contaminated soil is 3% by gravimetric method; add the compound fertilizer containing N, P, K, etc. required for plant growth and the carbon source and nitrogen source required for microbial growth 0.3 kg of food and other nutrients, and then flattened to make a mixed soil with a thickness of 20-30 cm; sow alfalfa seeds in the mixed soil, supplement water to maintain seed germination; maintain suitable degradation conditions such as light, ventilation, and moisture retention, and the natural temperature is about 20 ~35 o C. Maintain plant growth and microbial metabolism; after one month of restoration, through the synergistic effect of plant growth and microbial degradation, the oil content of the polluted soil was detected by gravimetric method to be 0.6%...

Embodiment 3

[0030] Put 20 kg of CSETIA-BR series starch compound crystal gel microbial restoration agent for immobilizing Rhodococcus and yeast into 2.5m 3 In the crude oil contaminated soil, mix evenly in situ, and the oil content of the contaminated soil is 0.3% by gravimetric method; add the compound fertilizer containing N, P, K, etc. required for plant growth and the carbon source and nitrogen source required for microbial growth 10 kg of food and other nutrients, and then flattened to form a mixed soil with a thickness of 20-30cm; sow the seeds of Carnation double-petal in the mixed soil, supplement water to maintain seed germination; maintain suitable degradation conditions such as light, ventilation, and moisture, and natural temperature about 20~35 o C, maintain plant growth and microbial metabolism; after 3 months of restoration, through the synergistic effect of plant growth and microbial degradation, the oil content of the polluted soil was detected by gravimetric method to be...

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Abstract

The invention discloses a method for bioremediation of crude oil polluted soil by using plants and cryogel. According to the method, herbaceous plants such as alfalfa or Gypsophila paniculata and a cryogel microbial restorer for fixing crude oil degrading bacteria and fungi are taken as objects, the synergistic growth metabolism of the plants and microorganisms is utilized to degrade crude oil inpolluted soil and remove crude oil pollutants, thus realizing bioremediation of the polluted soil. The method has the advantages of simple operation, high degradation removal rate of the crude oil pollutants, short repair period and convenient industrial application, is suitable for in-situ bioremediation of the crude oil pollutants in inland soil environment, and has wide application prospect inthe fields of oil exploitation and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for biologically remediating crude oil polluted soil by using plants and crystal glue. Background technique [0002] The remediation of oil-contaminated soil is a worldwide problem. Decades of research have been carried out on related technologies at home and abroad, and methods such as physical adsorption or emulsification, dispersion and leaching, chemical decomposition and microbial degradation have been proposed. However, physical and chemical methods cannot completely remove petroleum hydrocarbons, which are costly, difficult to treat large areas, and often cause secondary pollution; microbial methods can completely degrade petroleum, which are low in cost and can be implemented on a large scale, but the degradation rate is slow. [0003] In recent years, the collaborative remediation of microorganisms and plants has become an important ...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10
CPCB09C1/10B09C1/105B09C2101/00
Inventor 贠军贤卜涛田兵梁庆张颂红张道涛陈蒙万立之艾健强
Owner 陕西欧菲德环保科技有限公司
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