Method for increasing utilization rate of petroleum-contaminated soil through miscanthus sinensis, biochar and pig raising wastewater

A technology of oil pollution and biochar, applied in the restoration of polluted soil and other directions, can solve the problem of low soil utilization rate, and achieve the effects of strong treatment effect, improvement of soil properties and simple method.

Active Publication Date: 2017-06-23
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] Aiming at the problem that the utilization rate of petroleum-contaminated soil is not high at present, the present invention provides a method for using petroleum-contaminated so...

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for improving the utilization rate of oil-contaminated soil by utilizing miscanthus, biochar and pig raising wastewater, adopting the following steps:

[0026] (1) Raw material pretreatment:

[0027] 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;

[0028] (2) Preparation of biochar materials:

[0029] Cut the dried corn stalks into 0.5cm and 1cm long sections with a cutting machine, cut a part of the rice straw into 0.5cm long sections, crush the other part, and pass through a 40-mesh sieve; the 0.5cm and 1cm long corn stalks are pressed Mass ratio 1׃1 mixed, 0.5cm long and 40 mesh sieved rice straw powder mixed by mass ratio 1׃1. Put the above-mentioned prepared raw materials in a crucible, seal it, carbonize it in an atmosphere box furnace, and crack it at 300 °C for 3 h in the anoxic state to prepare biochar;

[0030] (3) Preparation of composite material...

Embodiment 2

[0037] A method for improving the utilization rate of oil-contaminated soil by utilizing miscanthus, biochar and pig raising wastewater, adopting the following steps:

[0038] (1) Raw material pretreatment:

[0039] 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.

[0040] (2) Preparation of biochar materials:

[0041] 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.

[0042] (3) Preparation of composite materials

[0043] Corn straw biochar and rice straw biochar with different particle size and length were mixed at a mass ratio of 1׃1.

[0044] (4) ...

Embodiment 3

[0054] A method for improving the utilization rate of oil-contaminated soil by utilizing miscanthus, biochar and pig raising wastewater, adopting the following steps:

[0055] (1) Raw material pretreatment:

[0056] 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.

[0057] (2) Preparation of biochar materials:

[0058] 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.

[0059] (3) Preparation of composite materials

[0060] Corn straw biochar and rice straw biochar with different particle size and length were mixed at a mass ratio of 1׃1.

[0061] (4) ...

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Abstract

The invention relates to a method for increasing the utilization rate of petroleum-contaminated soil through miscanthus sinensis, biochar and pig raising wastewater. A biochar composite material mixed with the pig raising wastewater is added in the petroleum-contaminated soil; meanwhile the moisture content of the soil is adjusted, and the soil is stirred moderately to improve the permeability and water-holding capacity of the soil and improve the N and P contents; and on the basis, the energy plant miscanthus sinensis is planted to further improve the using efficiency of the petroleum-contaminated soil. By measuring and calculating the survival rate of the miscanthus sinensis and biomass of the soil as well as the total petroleum hydrocarbons content change in the soil, it is shown that according to the method, the utilization efficiency of the petroleum-contaminated soil is improved effectively, and the energy plant with the high yield and energy is gained; and meanwhile resource utilization of agricultural waste and the pig raising wastewater is achieved, and the method is simple and feasible and without secondary pollution.

Description

technical field [0001] The invention relates to a method for improving the use efficiency of oil-polluted soil by combining physical methods and biological methods, in particular to a method for improving the use efficiency of oil-polluted soil by using miscanthus, biochar and pig raising wastewater. Background technique [0002] During the process of oil development, transportation, storage and processing, oil enters into the soil environment due to the leakage of oil, causing oil pollution in the soil. After petroleum pollutants enter the soil environment, they will destroy the original structure of the soil, reduce the permeability of the soil, and affect the coordination of the proportion of nutrients in the soil, which in turn affects the survival of microorganisms and the growth of plants in the soil, resulting in waste of land resources. Contents of the invention [0003] Aiming at the problem that the utilization rate of petroleum-contaminated soil is not high at p...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/10
Inventor 李法云王艳杰陈佳勃
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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