Method for treating organic polluted soil

An organic pollution and soil technology, applied in the field of organic pollution soil treatment, can solve the problems of low cost and short treatment time, and achieve the effects of low cost, simple operation and improved biodegradability

Active Publication Date: 2012-06-27
苏州市环境科学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and provide a new method for treating organically pollu

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Select two plots of 5×5 meters with moderate organic pollution (marked as S1-O 3 and S2-O 3 ), all adopt the treatment method of ozone oxidation first, and then add biological soil purifier; take another 5 × 5 m plots with medium concentration of organic pollution (marked as S1-bacteria and S2-bacteria respectively), and use The treatment method of directly adding biological soil purifier.

[0045] The experimental results select the relevant data in the "Soil Environmental Quality Standards" (GB15618-2009) (draft for comments), see the table below:

[0046] name

Residential land (mg / kg)

Commercial use (mg / kg)

toluene

5.0

26

Petro

1000

3000

carbon tetrachloride

0.1

0.17

Chloroform

0.1

0.4

[0047] The specific experimental process and effects are discussed as follows:

[0048] 1. Processing time: the total processing time is 31 days, of which S1-O 3 , S2-O 3 Ozone t...

Embodiment 2

[0063] In this example, the medium-concentration organically polluted soil of 5m×5m is used as a unit, and the treatment method of ozone oxidation treatment + biological soil purifier + planting vetiver is used to treat the contaminated soil of Suhua Plant, as follows:

[0064] (1) Weeds and cement bricks and other wastes were removed, and soil sampling and analysis before treatment were carried out at 4m×4m points (6 points in total).

[0065] (2) Dig a 2m x 2m pit in the center of the selected test area, the depth of which is more than 2.5m, determined by the depth of the polluted layer. Build bricks around to separate it from other polluted areas, and pile the soil around the periphery of the 5m×5m square test area and the periphery of the 2m×2m central pit, with a width of about 0.5m and a height of about 0.5m. The pile of soil should be dense, so that the extracted ozone water is limited to the test area, and it infiltrates evenly from the soil surface to ensure that the ...

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PUM

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Abstract

The invention relates to a method for treating organic polluted soil. The method comprises the following steps of: performing ozone oxidation treatment on the organic polluted soil, and then performing biodegradation treatment on the soil subjected to the ozone oxidation treatment. Non-degradable organic substances in the soil are degraded into small molecular degradable organic substances by using the strong oxidation effect of ozone, so that the biodegradability of the substances is improved, and a good foundation is laid for the next biological treatment. The biodegradation method adopted after the ozone treatment is low in cost and most obvious in effect and does not cause the problem of secondary pollution. Further, based on the ozone oxidation treatment and the biodegradation treatment, vetiveria zizanioides is planted, and microbes can be successfully distributed in the polluted soil by using the well-developed root system of the vetiveria zizanioides, so that the pollutants inthe soil are thoroughly removed. Compared with the prior art, the invention has the advantages that: the method is easy and convenient to operate, economic and practical; and by the method, the medium organic substance polluted soil can meet the requirements of related standards after only 5 to 8 months of treatment.

Description

technical field [0001] The invention relates to a method for treating polluted soil, in particular to a method for treating organic polluted soil. Background technique [0002] At present, there are two main methods for the treatment of organic polluted soil: displacement repair and in-situ repair, and the corresponding treatment options are as follows: [0003] Option 1: Replace the soil, that is, remove the soil layer containing harmful substances and use fresh soil to backfill. Then treat the toxic soil taken away and use it elsewhere; [0004] Plan 2: Irrigation, that is, dilute some toxic substances to the ground through irrigation, and then drill wells around to let the diluted water seep into the well, and the water is taken out for treatment to meet the sewage discharge standard; [0005] Option 3: Drying, that is, digging up the toxic soil layer for drying treatment, eliminating toxic substances, and then backfilling the dried soil; [0006] Option 4: Irrigate st...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/08B09C1/10
Inventor 杨积德张建荣申进忠周克风
Owner 苏州市环境科学研究所
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