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Method for biologically repairing soil polluted by petroleum hydrocarbon compounds and application

A bioremediation and petroleum hydrocarbon technology, applied in the field of soil remediation, can solve the problems of difficult application of soil remediation technology, restricted degradation, slow mass transmission speed, etc., and achieve the effects of shortening soil remediation time, simple implementation and wide applicability

Inactive Publication Date: 2015-07-15
恒大绿洲(青岛)生态草业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this slow mass transfer rate restricts the degradation of pollutants by microorganisms, which brings difficulties to the application of soil remediation technology.

Method used

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  • Method for biologically repairing soil polluted by petroleum hydrocarbon compounds and application
  • Method for biologically repairing soil polluted by petroleum hydrocarbon compounds and application
  • Method for biologically repairing soil polluted by petroleum hydrocarbon compounds and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The remediation process of oil-contaminated soil in the Central Plains (Henan Province), the process can be roughly found in figure 1 shown. The soil contains 5600ppm of heavy oil; the area is 1.5 hectares of typical local farmland; the crops (wheat and corn) are not growing; in February 2010, the land was prepared, leveled, fertilized (N: 10 kg / mu), and remediation biological agent (100 kg per mu) and rotary tillage; sowing in early March, mixing annual ryegrass (Lolium multiflorum), perennial ryegrass (Lolium perenne) and tall fescue grass (Festuca arundinacea) in a ratio of 2:1:1, the dosage per mu was 16 kg; Carry out bacterium liquid coating before sowing, coating bacterium is Pseudomonas cedrina UW3 and Pseudomonas putida UW4 fermentation bacterium stoste (patent 200810181327.8 embodiment 1 is prepared to the bacterium liquid that step (16) obtains), by 8ml / kg seed coating, 20,000 Bacterial cells / granule; during the repair process of 8 months, cut 2 times, at the...

Embodiment 2

[0074] The remediation process of coal tar-contaminated soil in Northeast China (Liaoning Province). The soil contains 3100ppm of coal tar pollution; the area is 2.1 hectares; crops (wheat and corn) cannot grow; in March 2011, the land was prepared, leveled, fertilized (N: 10 kg / mu), and remediation biological agents (100 kg / mu) were applied and rotary tillage; sowing in early April, mixing annual ryegrass (Lolium multiflorum), perennial ryegrass (Lolium perenne) and tall fescue grass (Festuca arundinacea) at a ratio of 2:1:1, with an amount of 20 kg per mu; Bacteria solution coating, the coating bacteria solution is Pseudomonas cedrina UW3 and Pseudomonas putida UW4, 20,000 bacterial cells / grain; during the repair process of 6 months, cut twice, at the end of June and August; sampling in early October (30 pieces) Analysis and testing, the results are summarized as follows: the degradation rate of the new technology is 82%, the traditional microbial technology is 43%, and the ...

Embodiment 3

[0093] Remediation Process of Heavy Oil Contaminated Soil in Northeast China (Heilongjiang Province). The soil contains 1200ppm of heavy oil pollution (mainly the part of 15-25C molecules); the area is 0.5 hectares in April 2009, land preparation, leveling, fertilization (N: 10 kg / mu), application of remediation biological agents (50 kg / mu) and Rotary tillage; sow on May 20, mix annual rye and tall fescue grass (Festuca arundinacea) at a ratio of 3:1, and use 20 kg per mu; seeds are coated with bacterial solution before sowing, and the coated bacterial solution is Pseudomonas cedrina UW3 and Pseudomonas putida UW4, 20,000 bacterial cells / grain; during the repair process of 5 months, harvested once, in mid-July; on October 20, the initial sampling (3) was analyzed and tested, and the results are summarized as follows: Degradation of new technology The rate is 55%, and the traditional microbial technology is 15%. The result is as Figure 4 shown.

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Abstract

The invention provides a method for biologically repairing soil polluted by petroleum hydrocarbon compounds. The method comprises the steps of planting repairing plants in the soil and applying repairing biological agents to the soil. The repairing plants are compositions of one or more of annual ryegrass, perennial ryegrass, tall fescue grass and prairie gramineous crops. The repairing biological agents at least comprise bacterium solutions containing plant promoting bacteria, and the bacterium solutions contain plant promoting bacteria Pseudomonas cedrina UW3 and Pseudomonas putida UW4. With the method, time of soil repairing can be greatly shortened, and generally in the seriously-polluted area, the soil can be repaired to the level before pollution within three years to five years.

Description

technical field [0001] The invention relates to the field of soil remediation, in particular to a method for bioremediating soil polluted by petroleum hydrocarbon compounds and its application. Background technique [0002] With the development of modern industry, soil pollution has gradually become one of the global environmental problems. Especially mining, metal smelting, oil extraction and chemical industry production, the most serious soil pollution. The content of heavy metals, hydrocarbons and various toxic salts in the soil is too high, and it is difficult to eliminate them by natural decomposition for a long time. [0003] Petroleum hydrocarbons contain a large number of harmful substances, such as benzene series, polycyclic aromatic hydrocarbons and other refractory toxic and harmful substances. Soil polluted by petroleum hydrocarbons not only has a direct toxic effect on the human body, but also leads to a reduction in food production. [0004] Petroleum hydroc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 黄晓东
Owner 恒大绿洲(青岛)生态草业有限公司
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