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New method for combined remediation of compound contaminated soil

A compound pollution and joint restoration technology, applied in the field of compound polluted soil and joint restoration of compound polluted soil, can solve the problems of poor restoration effect of compound pollution polluted soil, unfavorable large-scale application, long restoration period, etc., so as to shorten the restoration time, The effect of low residual rate and simple repair method

Inactive Publication Date: 2012-01-18
杭州韦尔茂通环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can effectively remediate the soil polluted by polycyclic aromatic hydrocarbons, it only remediates the soil with a single pollutant, and the remediation effect on the polluted soil with compound pollution is poor, and the required remediation period is also long, which is not conducive to large scale application

Method used

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  • New method for combined remediation of compound contaminated soil
  • New method for combined remediation of compound contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Choose 100g of compound polluted soil polluted by heavy metals and polycyclic aromatic hydrocarbons, then add humic acid and activated sludge, wherein the addition of humic acid is 0.5% of the dry weight of the compound polluted soil, and the addition of activated sludge is the dry weight of soil Then adjust the pH value to 6.5, and then set the volume to 200mL, then put it into a shaker, control the culture temperature at a constant temperature of 35°C, shake the culture and restore it for 48 hours, and then realize the compound polluted soil. Restoration, to get the repaired soil.

[0032] The activated sludge mentioned above is obtained after culturing the sludge in the aeration tank of the sewage treatment plant. The specific cultivating method is:

[0033] The sludge selected from the aeration tank of the sewage treatment plant was added to the culture medium, and the temperature was controlled at 35°C, and the shaker speed was 200r / min, and the shaker culture was ...

Embodiment 2

[0036] Choose 100g of composite polluted soil polluted by heavy metals and polycyclic aromatic hydrocarbons, then add humic acid and activated sludge, wherein the addition of humic acid is 1.0% of the dry weight of the composite contaminated soil, and the addition of activated sludge is soil dry weight Then adjust the pH value to 7.5, then set the volume to 200mL, put it into a shaker, control the culture temperature at a constant temperature of 26°C, and shake the culture for 56 hours to repair the compound polluted soil. Restoration, to get the repaired soil.

[0037] The above-mentioned activated sludge is activated sludge after cultivation, and the specific cultivation method of activated sludge is:

[0038] The sludge selected from the aeration tank of the sewage treatment plant was added to the culture medium, and the temperature was controlled at 30°C, and the shaker speed was 150r / min, and the shaker culture was carried out. During the culture process, BOD 5 :Nitrogen...

Embodiment 3

[0041] Choose 100g of compound polluted soil polluted by heavy metals and polycyclic aromatic hydrocarbons, then add humic acid and activated sludge, wherein the addition of humic acid is 0.1% of the dry weight of the compound polluted soil, and the addition of activated sludge is the dry weight of soil Then adjust the pH value to 8.5, then adjust the volume to 200mL, put it into a shaker, control the culture temperature at a constant temperature of 20°C, and shake the culture for 60 hours to repair the composite polluted soil. , to obtain the repaired soil.

[0042] The above-mentioned activated sludge is activated sludge after cultivation, and the specific cultivation method of activated sludge is:

[0043] The sludge selected from the aeration tank of the sewage treatment plant was added to the culture medium, and the temperature was controlled at 40°C, and the shaker speed was 250r / min, and the shaker culture was carried out. During the culture process, BOD 5 :Nitrogen:Ph...

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Abstract

The invention relates to a new method for combined remediation of compound contaminated soil, which belongs to the technical field of regeneration of the contaminated soil. The method comprises the following steps: adding humic acid and activated sludge into the compound contaminated soil, adding water, then regulating the pH value to 6.0-8.5, controlling the culture temperature at 15 DEG C-40 DEG C, and performing remediation for 1-6 days so as to get the soil subjected to remediation. The method has the advantages that the used raw materials are easy to get, the production process is simpleand easy to operate, the remediation method is simple, the remediation effect on the compound contaminated soil is better, the residual rate of heavy metals in the soil and the residual rate of polycyclic aromatic hydrocarbons are lower after the remediation, and the degradation effect is obvious.

Description

technical field [0001] The invention relates to a compound polluted soil, in particular to a new method for jointly repairing the compound polluted soil, and belongs to the technical field of polluted soil regeneration. Background technique [0002] Soil refers to the loose surface layer on the land surface that is fertile and capable of growing plants. Its thickness is generally about 2m. The soil not only provides mechanical support for plant growth, but also provides water, fertilizer, air, heat, etc. for plant growth and development. Fertility elements are also the basis of human activities. However, with the rapid development of social economy and industry, solid wastes are continuously stacked and dumped on the soil surface, harmful waste water is continuously infiltrated into the soil, and harmful gases and floating dust in the atmosphere are constantly falling into the soil with rainwater, resulting in soil pollution. , and soil pollution is becoming more and more s...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/10
Inventor 于红艳张昕欣杨伟群
Owner 杭州韦尔茂通环境技术有限公司
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