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A method for adjusting the ratio of carbon, nitrogen and phosphorus in oil-contaminated soil

A technology for oil pollution and soil, which is applied in the restoration of polluted soil and other directions to achieve the effects of convenient operation, easy operation and simple improvement method.

Active Publication Date: 2020-04-17
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems existing in the regulation of C׃N׃P in oil-polluted soil at present, and provides a simple, efficient, waste resource utilization biochar and biomass composite material mixed with pig-raising wastewater to regulate oil-polluted soil The method of C׃N׃P

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for regulating oil-contaminated soil C׃N׃P, using the following steps:

[0031] (1) Raw material pretreatment:

[0032] Collect the remaining corn stalks and rice stalks in the farmland, choose a flat and dry ground, dry the corn stalks and rice stalks, and set aside.

[0033] (2) Preparation of biochar materials:

[0034] Cut the dried corn stalks into 0.5cm and 1cm long sections with a cutting machine, cut the rice stalks into 0.5cm long sections, crush the other part, and pass through a 40-mesh sieve. The above-mentioned prepared raw materials were placed in a crucible, sealed and carbonized in an atmosphere box furnace, and pyrolyzed in anaerobic manner at 300 °C for 3 h to prepare biochar.

[0035] (3) Biomass material preparation:

[0036] Crush the rice stalks into flocs with a pulverizer and set aside.

[0037] (4) Preparation of composite materials:

[0038] Corn straw biochar and rice straw biochar with different particle size and length were mix...

Embodiment 2

[0046] A method for regulating oil-contaminated soil C׃N׃P, using the following steps:

[0047] (1) Raw material pretreatment:

[0048] Collect the remaining corn stalks and rice stalks in the farmland, choose a flat and dry ground, dry the corn stalks and rice stalks, and set aside.

[0049] (2) Preparation of biochar materials:

[0050] Cut the dried corn stalks into 0.5cm and 1cm long sections with a cutting machine, cut the rice stalks into 0.5cm long sections, crush the other part, and pass through a 40-mesh sieve. The above-mentioned prepared raw materials were placed in a crucible, sealed and carbonized in an atmosphere box furnace, and pyrolyzed in anaerobic manner at 300 °C for 3 h to prepare biochar.

[0051] (3) Biomass material preparation:

[0052] Crush the rice stalks into flocs with a pulverizer and set aside.

[0053] (4) Preparation of composite materials:

[0054] Corn straw biochar and rice straw biochar with different particle size and length were mixed...

Embodiment 3

[0063] A method for regulating oil-contaminated soil C׃N׃P, using the following steps:

[0064] (1) Raw material pretreatment:

[0065] Collect the remaining corn stalks and rice stalks in the farmland, choose a flat and dry ground, dry the corn stalks and rice stalks, and set aside.

[0066] (2) Preparation of biochar materials:

[0067] Cut the dried corn stalks into 0.5cm and 1cm long sections with a cutting machine, cut the rice stalks into 0.5cm long sections, crush the other part, and pass through a 40-mesh sieve. The above-mentioned prepared raw materials were placed in a crucible, sealed and carbonized in an atmosphere box furnace, and pyrolyzed in anaerobic manner at 300 °C for 3 h to prepare biochar.

[0068] (3) Biomass material preparation:

[0069] Crush the rice stalks into flocs with a pulverizer and set aside.

[0070] (4) Preparation of composite materials:

[0071] Corn straw biochar and rice straw biochar with different particle size and length were mix...

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Abstract

The invention relates to a method for regulating the ratio of carbon to nitrogen to phosphorus in petroleum contaminated soil. The method is characterized in that charcoal and a mixture of bio-composites and swine wastewater are added into the petroleum contaminated soil, meanwhile the water content of the soil is regulated, the soil is scarified moderately, the content of N and P in the petroleum contaminated soil is improved, and the purpose of regulating the ratio of C to N to P in the petroleum contaminated soil is achieved; specifically, 10 kg of air-dried petroleum contaminated soil is taken as the reference, 5-8 percentage by weight of a uniformly stirred mixed material of charcoal and rice straw floccules after immersion is added, the water content is regulated to 50%-60%, water complement is carried out and the soil is scarified at regular times. According to the method for regulating the ratio of carbon to nitrogen to phosphorus in the petroleum contaminated soil, through determination and calculation of the ratio of C to N to P in the petroleum contaminated soil, the ratio of C to N to P in the petroleum contaminated soil is effectively regulated; besides, the resource utilization of agricultural wastes and swine wastewater is realized, and therefore the method is simple, easy to implement and free from secondary contamination.

Description

technical field [0001] The invention relates to a method for adjusting the ratio of carbon, nitrogen and phosphorus in oil-polluted soil, in particular to a method for adjusting the ratio of carbon, nitrogen and phosphorus in oil-polluted soil by using biochar and biomass composite materials to mix pig raising wastewater. Background technique [0002] In the process of petroleum exploration and development, soil pollution caused by drilling, downhole operations, oil production and other accidents such as blowout and leakage has become one of the important issues of widespread concern at home and abroad. After petroleum pollutants enter the soil environment, some strong polar groups will combine with organic matter and some nutrients in the soil. For example, the combination of humus, inorganic nitrogen and phosphorus, etc., limits the nitrification, denitrification and phosphorylation in the soil. It reduces the organic matter, nitrogen and phosphorus content in the soil th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
CPCB09C1/00
Inventor 王艳杰李法云陈佳勃
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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