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Soil repair method for treating polychlorinated biphenyl pollutants

A soil remediation and polychlorinated biphenyl technology, applied in the field of soil remediation, can solve problems such as direct mineralization and decomposition without PCBs, and achieve low-cost effects

Active Publication Date: 2011-02-09
浙江博世华环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, there is currently no relevant report on the study of direct mineralization and decomposition of PCBs

Method used

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  • Soil repair method for treating polychlorinated biphenyl pollutants

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Comparison scheme
Effect test

Embodiment 1

[0065] A soil remediation method for dealing with polychlorinated biphenyl pollutants sequentially includes building greenhouses, site scarification, anaerobic-aerobic alternate composting and phytoremediation;

[0066] Greenhouse construction:

[0067] The working area is protected by a special multi-span greenhouse. The single-span width of the greenhouse is 8.0m, and the length is 40m. It is supported by φ25 steel pipes with a wall thickness of 1.8mm. The highest is 4.2m. The polyvinyl chloride non-drip film with good waterproof, light transmittance and heat preservation functions is selected for the construction of the greenhouse and has strong toughness.

[0068] Ground loosening:

[0069] Use an excavator to pre-loosen the soil at a depth of 60cm in the operation area, break and level the larger soil clods, and then transport the contaminated soil within 60cm depth outside the operation area to the operation area for stacking, and at the same time, carry out the operat...

Embodiment 2

[0081] A soil remediation method for dealing with PCB pollutants consists of greenhouse construction, site plowing, two anaerobic-aerobic alternating composting, the first phytoremediation, and the third anaerobic-aerobic alternating composting , the second phytoremediation; wherein anaerobic composting and aerobic composting complete an anaerobic-aerobic composting cycle. The plowing in the anaerobic-aerobic alternate stacking system is completed by the joint operation of excavators, rotary tillers, and compost turners. The rotary tillage of each operation unit is divided into two layers, each layer is 30cm, and the operation procedure is as follows:

[0082] 1) First use an excavator to dig out the soil at a depth of 30cm from the surface of the first unit, and then apply organic fertilizer to the soil at a depth of 30cm at the bottom of the first unit at a rate of 3.75kg / m 2 ;

[0083] 2) Use a rotary tiller to plow and stir the 30cm-thick soil at the bottom of the first u...

Embodiment 3

[0097] A soil remediation method for dealing with PCB pollutants consists of greenhouse construction, site plowing, two anaerobic-aerobic alternating composting, the first phytoremediation, and the third anaerobic-aerobic alternating composting , The second phytoremediation. An anaerobic-aerobic alternate composting cycle is completed through anaerobic composting and aerobic composting.

[0098] Greenhouse construction:

[0099] The working area is protected by a special multi-span greenhouse. The single-span width of the greenhouse is 8.0m, and the length is 40m. It is supported by φ25 steel pipes with a wall thickness of 1.8mm. The highest is 4.2m. The polyvinyl chloride non-drip film with good waterproof, light transmittance and heat preservation functions is selected for the construction of the greenhouse and has strong toughness.

[0100] Ground loosening:

[0101] Use an excavator to pre-loosen the soil at a depth of 60cm in the operation area, break and level the la...

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Abstract

The invention relates to a soil repair method for treating polychlorinated biphenyl pollutants, which comprises steps of greenhouse construction, anaerobic-aerobic alternated piling and plant repair, wherein the plant repair step comprises that: alfalfa for decomposing polychlorinated biphenyl and cocozelle for enriching the polychlorinated biphenyl are planted after the piled body is flattened, one-time plant repair time is controlled to be between 2 and 6 months, and the planted alfalfa and the planted cocozelle are directly returned to a field. The method repairs the soil by using anaerobic-aerobic alternated piling and plant repair modes, so different from a chemical method which produces new pollutants, the method has no pollution or damage to the repaired place; and the method is also different from obligate bacteria treatment technology for treating the soil. The soil repair method is an optimized soil repair method with low cost, no pollution and no damage to a soil ecologicalsystem.

Description

technical field [0001] The invention relates to a soil remediation method, in particular to a soil remediation method for treating organic pollutants, and belongs to the technical field of soil remediation. Background technique [0002] Polychlorinated Biphenyls (PCBs) are a class of stable, acute and chronic toxic, typical persistent organic pollutants (POPs), used as insulating oil for capacitors and transformers, batteries, carbon paper, inks, paints Lubricants, fire retardants, binders, paraffin wax extenders, fuel dispersants and pesticide delay agents are widely used in the fields of electric power industry, plastic processing industry, chemical industry and printing industry. Due to their persistence and resistance to degradation, It is still one of the most important pollutants in the environment. [0003] PCBs can enter animals and humans through the biological chain and accumulate, concentrate and amplify, and have inducing effects on lesions and even cancers in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 陈昆柏况武王中伟邵晓周
Owner 浙江博世华环保科技有限公司
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