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Method for restoring crude oil-polluted soil by using sludge generated in yeast production

A technology of polluted soil and sludge, applied in the field of environmental restoration, can solve the problems of difficult separation of oil and soil, achieve the effect of increasing soil permeability, improving micro-ecological environment, and promoting synergistic degradation

Inactive Publication Date: 2012-12-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

[0004] Oil-contaminated soil can be repaired by using native petroleum hydrocarbon-degrading microorganisms in the soil. However, due to the combination of soil particles and petroleum pollutants, it is difficult to separate oil from soil. The impact of these pollutants is more significant, thereby slowing down the degradation rate of these pollutants

Method used

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Embodiment Construction

[0019] The application effects of the present invention are further described below through examples, but the present invention is not limited.

[0020] The implementation process is as follows:

[0021] A method for remediating crude oil-contaminated soil with yeast production sludge, including detection of crude oil-contaminated soil, detection of sludge released from yeast production, and restoration, maintenance and detection of crude oil-contaminated soil by removing sludge from yeast production; It is characterized in that the yeast production sludge containing 40-48% of organic matter, 3.12-3.6% of nitrogen, 0.28-0.56% of phosphorus, and 5.38-6.1% of potassium is directly used for the remediation of crude oil contaminated soil, and the remediation steps are:

[0022] a) Use the sludge from yeast production with a water removal rate of 95-100% containing 40-48% of organic matter, 3.12-3.6% of nitrogen, 0.28-0.56% of phosphorus, and 5.38-6.1% of potassium to be directly u...

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Abstract

The invention discloses a method for restoring crude oil-polluted soil by using sludge generated in yeast production, comprising the following steps of: detecting the crude oil-polluted soil, detecting the sludge generated in yeast production, and storing the crude oil-polluted soil by using the sludge generated in yeast production, wherein the sludge which is generated in yeast production and contains 40-48% of organic material, 3.12-3.6% of nitrogen, 0.28-0.56% of phosphorus and 5.38-6.1% of potassium by mass and has the water removal rate of 95-100% is directly used for the restoration of the crude oil-polluted soil, and the ratio of the crude oil-polluted soil to the sludge generated in yeast production and blended in the crude oil-polluted soil is 100:(10-15) so that oil in the blended soil has the weight of 30mg / Kg and the pH value of 6.8-8.0; and maintaining and growing acid-resisting plants or alkali-resisting plants in the soil to form farming lands.

Description

technical field [0001] The invention belongs to the technology of environmental remediation, and in particular relates to a method for remediating crude oil polluted soil with yeast production sludge. Background technique [0002] Before the 1980s. Treatment of petroleum hydrocarbon-contaminated soil is limited to physical and chemical methods, namely heat treatment and chemical leaching. Heat treatment is through incineration or calcination, which can purify most of the organic pollutants in the soil. But at the same time, it also destroys the soil structure and components, and it is expensive and difficult to implement. Chemical leaching and water washing can also achieve better degreasing effect. However, the secondary pollution of the chemical reagents used limits its application. Back in the 1970s. In order to solve the problem of soil being polluted by oil when oil pipelines and oil storage tanks fail and oil spills, Esso Research and Engineering Company of the Un...

Claims

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Application Information

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IPC IPC(8): B09C1/10
Inventor 王海峰李阳王增林张建丁慧黄文升
Owner CHINA PETROLEUM & CHEM CORP
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