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Construction method of organic fertilizer nutrition system for remedying petroleum-contaminated soil through biostimulation

A technology of oil pollution and biological stimulation, applied in the field of construction of organic fertilizer nutrition system, can solve the problems of easy loss of inorganic nutrients, hindered growth and proliferation of microorganisms, secondary pollution, etc., so as to improve the repair efficiency and enhance the repair effect. The effect of secondary pollution

Active Publication Date: 2018-10-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic nutrient addition method can also repair soil, but inorganic nutrient substances in the soil are easy to lose, easy to eutrophication, and easy to cause secondary pollution. After excessive pH value is too high, microbial growth and proliferation are hindered and other shortcomings, the development is limited to a certain extent. limit

Method used

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  • Construction method of organic fertilizer nutrition system for remedying petroleum-contaminated soil through biostimulation
  • Construction method of organic fertilizer nutrition system for remedying petroleum-contaminated soil through biostimulation
  • Construction method of organic fertilizer nutrition system for remedying petroleum-contaminated soil through biostimulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] After high-temperature fermentation, sterilization, deodorization and other measures, 7 kinds of organic fertilizer chicken manure, cow manure, pig manure, sheep manure, duck manure, horse manure and humic acid are air-dried and air-dried, then crushed and passed through a 40-80 mesh sieve for later use . The basic physical and chemical properties were determined, including organic matter, total nitrogen, total phosphorus, available phosphorus, and hydrolyzed nitrogen content.

[0037] Among them, the basic physical and chemical properties determination methods are as follows:

[0038] Potassium dichromate volumetric method-dilution heat method was used for organic matter; Kjeldahl method was used for total nitrogen content; alkali fusion-molybdenum antimony anti-spectrophotometry was used for total phosphorus content; NaHCO was used for available phosphorus content 3 Extraction-molybdenum antimony anti-colorimetric method; hydrolyzed nitrogen content was determined by...

Embodiment 2

[0041] The oil-contaminated soil of Shengli Oilfield was used as the experimental soil. The soil sample was crushed and turned until loose. After air-drying, it passed through a 2mm sieve to remove relatively large impurities and was used in the flowerpot restoration experiment. The ratio of C, N, and P in the soil was adjusted to 100: (5-15): 1. During the repair process, the water content in each flower pot is adjusted by weight reduction method to keep it at 15-30%. , The pH is 7.0-7.5, the temperature is 25-35°C, and the soil is turned every 2-3 days.

[0042] The seven kinds of organic fertilizers in Example 1 were added to the petroleum-contaminated soil separately at a mass ratio of 5%, and after 30 days of restoration, the remaining petroleum hydrocarbon content in the soil was determined by ultrasonic extraction-ultraviolet spectrophotometry.

[0043] Wherein, ultrasonic extraction-ultraviolet spectrophotometry is used to measure the remaining petroleum hydrocarbon co...

Embodiment 3

[0048] Chicken manure and cow manure, which have a better effect of degrading petroleum hydrocarbons in Example 2, were used in different initial test mass ratios of 1:5, 1:4, 1:3, 1:2, 1:1, 2:1, 3:1, 4 :1, 5:1 mixture, applied to the remediation of petroleum hydrocarbon contaminated soil.

[0049] The soil used in the experiment was consistent with that in Example 2, and the determination method of the remaining petroleum hydrocarbon content in the soil was the same as in Example 2.

[0050] After 30 days of restoration, the degradation rates of chicken manure and cow manure to petroleum hydrocarbons were 30.01%, 33.76%, 32.04%, 23.98%, 31.98%, 38.33%, 39.27%, 38.96%, 34.09%, respectively, of which 2:1 The repair effect is better in the range of -4:1.

[0051] and combined with image 3 It can be seen that compared with the mixing ratios of 1:5, 1:4, 1:3, 1:2, 1:1, and 5:1, the degradation effects of 2:1, 3:1, and 4:1 are better. Excellent degradation performance.

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Abstract

The invention relates to a construction method of an organic fertilizer nutrition system for remedying petroleum-contaminated soil through biostimulation. The construction method comprises the following steps that basic physical and chemical properties of seven types of organic fertilizer are determined and analyzed, and the two optimal types of organic fertilizer, namely chicken manure and cow dung, are preliminarily screened out to construct the organic fertilizer nutrition system. The organic fertilizer nutrition system is added to petroleum hydrocarbon-contaminated soil by a mass ratio of5% so that the soil environment can be improved, the activity of indigenous microorganisms is improved, and accordingly, degradation of petroleum hydrocarbon pollutants is accelerated through organicfertilizer biostimulation. Compared with other physical and chemical remediation methods, the construction method has the advantages that raw materials are extensive, cheap and easy to obtain, multifunctional fertilizer is improved, the remediation efficiency be improved, soil can be improved, and a dual-remediation effect is achieved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for constructing an organic fertilizer nutrient system for biological stimulation to remediate petroleum-contaminated soil. Background technique [0002] During the production, use, and transportation of petroleum, it is discharged into the soil environment in various ways, endangering human activities and the natural environment. At home and abroad, hundreds or even tens of millions of tons of oil enter the natural environment every year, mainly through leaks, accidents, waste pollution, air pollution and other ways to enter the soil, causing soil oil pollution. In the soil environment, these pollutants destroy the soil environment by changing the pore size of the soil and the ratio of carbon, nitrogen and phosphorus. The harmfulness of oil pollution in soil has developed to the stage that it must be treated in time. [0003] In the process of treating soil o...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/10B09C2101/00
Inventor 张秀霞张博凡胡旸熊鑫刘会娥顾莹莹刘春爽
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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