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A device and method for ectopic biopile gas phase extraction-biological ventilation repair of organic contaminated soil

A biological ventilation and gas phase extraction technology, applied in the field of environmental organic pollutant restoration, can solve the problems of pollutants cannot be effectively removed, secondary pollution, tailing, etc., and achieve in-situ rapid repair and treatment, equipment Easy installation and low operating costs

Inactive Publication Date: 2017-12-22
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the treatment of such volatile organic pollutants, methods such as physical extraction or chemical oxidation are often used to remove them. However, due to the occurrence of chemical reactions in such treatment, it is easy to cause secondary pollution, and physical extraction often causes "tailing" phenomenon. , leading to the ineffective removal of pollutants

Method used

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  • A device and method for ectopic biopile gas phase extraction-biological ventilation repair of organic contaminated soil
  • A device and method for ectopic biopile gas phase extraction-biological ventilation repair of organic contaminated soil
  • A device and method for ectopic biopile gas phase extraction-biological ventilation repair of organic contaminated soil

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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the device of the present invention includes a biological pile 7, a ventilation module I, a pollutant monitoring module II, an exhaust gas treatment module, a drip irrigation module, a leachate collection module and a power supply control system. The ventilation module Ⅰ is connected with the pollutant monitoring module Ⅱ and distributed in the soil of the biopile 7; the tail gas treatment module is connected with the aeration module Ⅰ, the drip irrigation module is distributed on the top of the biopile 7, the leachate collection module is distributed around the biopile 7, and the power supply control The system is connected to the ventilation module I. Ventilation module I includes a high-pressure vortex air pump 1, a gas-liquid separator 2, and an air extraction well 6 that doubles as an aeration well. One end of the high-pressure vortex air pump 1 is connected to the power supply control system, one end is connected to the gas-liquid separ...

Embodiment 2

[0031] The working process of the device of the present invention under the biological ventilation mode is as follows: as image 3 As shown, the gas flow rate is low in the biological ventilation mode, and the gas enters the ventilation well 6 through the high-pressure vortex air pump 1, the flow meter 3, and the gas-liquid separator 2, and diffuses into the soil of the biopile 7 to promote the growth of indigenous microorganisms in the soil Metabolism, so as to achieve the biodegradation of organic pollutants, to achieve the purpose of reducing biodegradable organic pollutants in the soil.

[0032] In a diesel polluted site in Guangdong, the device and method of the present invention were used to carry out ectopic biopile restoration demonstration. After 25 days of bioventilation restoration, the original average concentration of total petroleum hydrocarbon TPH in the soil was 1252 mg / kg, and the average concentration of pollutants dropped to 152mg / kg, the removal rate of die...

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Abstract

The invention discloses an ectopic biological reactor gas-phase extraction / biological ventilation repair device and a method of organic contaminated soil, belongs to the technical field of repair of organic environmental pollutants, and is suitable for the repair treatment of places with target pollutants as volatile organic compounds and biodegradable organic matters and having good soil permeability. The device comprises a biological reactor, a ventilation module, a pollutant monitoring module, a tail gas treatment module, a drip irrigation module, a percolate collecting module and a power supply control system. All module systems are cooperated to realize the ectopic extraction and biodegradation treatment of volatile organic pollutants in the organic contaminated soil; two repair technologies of soil gas-phase extraction and biological ventilation are coupled to realize quick and effective removal of the volatile organic compounds and the biodegradable organic matters in the soil; and the device and the method are simple in equipment installation, reasonable in system design and lower in operation cost, are suitable for the repair of places with higher volatile organic pollutant concentration in the soil, and can realize ectopic quick repair and treatment in place.

Description

technical field [0001] The invention belongs to the technical field of remediation of environmental organic pollutants, and in particular relates to a device and method for gas-phase extraction-biological ventilation remediation of heterotopic biological piles of organic polluted soil. Background technique [0002] Soil is an important part of the human ecological environment. With the acceleration of urbanization and the rapid development of modern industry and agriculture, more and more smelting and organic chemical industry relocation sites have been replaced by urban planning. The organic pollutants caused by the phenomenon enter the soil, which not only destroys the ecological system of the soil itself, but also poses a threat to groundwater resources; in addition, the pollution and leakage of oil extraction, smelting, use and transportation, and the discharge of oily wastewater have polluted the soil. It has also become the focus of the current international soil ecolo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/10
CPCB09C1/005B09C1/10
Inventor 廖晓勇阎秀兰马栋
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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