Biological method used for organic contaminated soil remediation

A soil remediation and organic pollution technology, which is applied in the biological field of organic polluted soil remediation, can solve the problems of low treatment cost and high degradation efficiency, achieve the effect of less labor and equipment investment, optimize soil ecological environment, and low cost

Inactive Publication Date: 2018-01-23
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are no relevant reports on biological treatment methods with low treatment cost, high degradation efficiency, and large-scale application.

Method used

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  • Biological method used for organic contaminated soil remediation
  • Biological method used for organic contaminated soil remediation
  • Biological method used for organic contaminated soil remediation

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The biological method of the present invention specifically includes the following steps: crushing and sieving the soil with a concentration of 72.08 mg / kg of HCH pollution in a certain chemical industry site, removing large stones, and using a sieve with an aperture of 50 mm; degrading bacteria, urea and phosphoric acid Potassium dihydrogen is dissolved in water, and the obtained mixed liquid is evenly added to the polluted soil with a water-to-soil mass ratio of 1:5 to make the soil water content 20%; after adding degrading bacteria and nutrient salts to the soil, the C and N in the soil , P element mass ratio is 100:10:1 and the contents are 8000mg / kg, 800mg / kg, 80mg / kg respectively, the total number of colonies is 1.2×10 5 cfu / g. The soil is stacked. The stacking scale is 10 meters long at the bottom, 7 meters long at the top, 8 meters wide at the bottom, 5 meters wide at the top, and 1.5 meters high. Probes, humidity probes, and according to the sampling test resu...

Embodiment 2

[0032] The biological method of the present invention specifically comprises the following steps: crushing and sieving the soil with a concentration of 182.14 mg / kg of HCH pollution in a certain chemical industry site to remove large stones, and the sieve aperture used is 40 mm; the degrading bacteria, urea and phosphoric acid Potassium dihydrogen is dissolved in water, and the obtained mixed liquid is evenly added to the polluted soil with a water-to-soil mass ratio of 1:7 to make the soil moisture content 14.3%; after adding degrading bacteria and nutrient salts to the soil, the C and N in the soil , P element mass ratio is 100:10:1 and the contents are 5000mg / kg, 500mg / kg, 50mg / kg respectively, the total number of colonies is 1.01×10 5 cfu / g. The soil is stacked. The stacking scale is 10 meters long at the bottom, 7 meters long at the top, 8 meters wide at the bottom, 5 meters wide at the top, and 1.5 meters high. Probes, humidity probes, and according to the sampling test...

Embodiment 3

[0034] The biological method of the present invention specifically includes the following steps: crushing and sieving the soil with a concentration of 72.08 mg / kg of H6H pollution in a certain chemical industry site, removing large stones, and using a sieve with an aperture of 40 mm; degrading bacteria, urea and phosphoric acid Potassium dihydrogen is dissolved in water, and the obtained mixed liquid is evenly added to the polluted soil with a water-to-soil mass ratio of 1:4 to make the soil water content 25%; after adding degrading bacteria and nutrient salts to the soil, the C and N in the soil , P element mass ratio is 100:10:1 and the contents are 10000mg / kg, 1000mg / kg, 100mg / kg respectively, the total number of colonies is 2.24×10 5cfu / g. The soil is stacked. The stacking scale is 10 meters long at the bottom, 7 meters long at the top, 8 meters wide at the bottom, 5 meters wide at the top, and 1.5 meters high. Probes, humidity probes, and according to the sampling test r...

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Abstract

The invention discloses a biological method used for organic contaminated soil remediation. The biological method comprises the operating steps that first, contaminated soil is crushed and sieved, sothat large stones are removed; second, degradation bacteria and nutritive salt are dissolved in water and then are added into the contaminated soil, the soil moisture content is kept to be 14.3%-25%,and the contents of C, N and P elements in the soil are 5000-10000 mg / kg, 500-1000 mg / kg and 50-100 mg / kg correspondingly; third, the soil is stacked, an aerator pipe with opening holes and a monitoring probe are arranged in the stacking process, the aerator pipe is connected with an air compressor, and air is conveyed to the soil through the aerator pipe; and fourth, the oxygen content, the moisture content and the temperature of the soil are monitored, the soil pH value and the organic pollutant concentration are subjected to sampling and detecting at regular intervals until the target pollutant concentration is lowered to be below the remediation target value, and then remediation is finished. According to the biological method used for organic contaminated soil remediation, the efficient degradation bacteria and nutrient substances are added, the microbial remediation effect is enhanced through a biopile technology, the biological remediation efficiency is improved, and the biological method has the advantages that the cost is low, operation is easy, no secondary pollution occurs, and manpower and equipment investment is reduced; and the biological method can be applied to organic contaminated site remediation at scale.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, in particular to a biological method for remediation of organic polluted soil. Background technique [0002] my country's economic development mode is generally extensive, the industrial structure and layout are still not reasonable, the total amount of pollutant discharge is relatively high, and the soil, as the final receptor of most pollutants, has a significant impact on its environmental quality. Due to the wanton discharge of industrial waste and excessive use of pesticides and fertilizers, organic pollutants are widely distributed in the environment and enriched in the soil environment, eventually endangering human health through bioaccumulation. Soil pollution is concealed, hysteresis, cumulative, irreversible, etc., making it difficult or expensive to remediate contaminated soil. [0003] Pollutants in soil come from a wide variety of sources and can be generally divided into i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
Inventor 杨崎峰周永信谢湉张德明蒋林伶黄大厅廖长君薛天利
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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