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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AI-Extracted Technical Summary

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 pe...

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Method used

B) above-mentioned remediation soil is maintained, and the soil after repairing is stirred 1-3 time every month, waters and replenishes according to water content in soil, makes soil water content remain between 8%-20% and makes crude oil pollution Mi...

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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.

Application Domain

Contaminated soil reclamation

Technology Topic

ChemistryNitrogen +6

Examples

Experimental program(1)

Example Embodiment

[0019] The following examples further describe the application effects of the present invention, but do not limit the present invention.

[0020] The implementation process is as follows:

[0021] A method for remediation of crude oil-contaminated soil by yeast production sludge, including the detection of crude oil-contaminated soil, the detection of sludge produced by yeast, and the restoration, maintenance and detection of crude oil-contaminated soil by using yeast production to remove sludge; The feature is that the yeast production sludge containing 40-48% organic matter, 3.12-3.6% nitrogen, 0.28-0.56% phosphorus, and 5.38-6.1% potassium is directly used for the remediation of crude oil contaminated soil. The remediation steps are:

[0022] a) Use yeast containing 40-48% organic matter, 3.12-3.6% nitrogen, 0.28-0.56% phosphorus, and 5.38-6.1% potassium, with a water removal rate of 95-100%, to produce sludge directly used for crude oil Remediation of contaminated soil, mixing the sludge produced by yeast production and mixing the mass of sludge produced by yeast into crude oil contaminated soil: sludge produced by yeast production = 100: 10-15, so that the oil content in the mixed soil is less than 30 mg /Kg, pH value is between 6.8-8.0;

[0023] b) Maintain the above-mentioned repaired soil. Turn the repaired soil 1-3 times a month, and supplement water according to the water content in the soil to keep the soil moisture content between 8%-20% and make the crude oil contaminate the soil. Microbes are in full contact with oil pollutants and yeast production to remove organic matter 40%, nitrogen 3.12%, phosphorus 0.28%, potassium 5.38% nutrients in the sludge, and improve the degradation efficiency of crude oil pollutants;

[0024] c) Rehabilitation and maintenance of the soil shall be tested in time. When it is close to the indicators of arable plants, plant acid-tolerant plants if the acid content is strong, and plant alkali-tolerant plants if the alkalinity is too strong to utilize the co-metabolism between organisms. The synergistic effect of microorganisms in the soil before crude oil pollution continues to repair crude oil contaminated soil, turning it into a good field for farming crops.

[0025] Comparison table of crude oil contaminated soil composition before remediation and soil composition after remediation, comparison table for analysis.

[0026] Before repair After repair Soil organic matter content X% X%+(5-10)% Crude oil percentage 3% 0.26%

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Reduce soil viscosity
Improve soil properties

Process for preparing non-soluble potassium fertilizer by using potassium-bearing minerals

ActiveCN103172409AReduce soil viscosityImprove loosenessPotassium fertilisersFertilizerChemistry

Owner:TSINGHUA UNIV

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

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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