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Permeable reactive barrier system and method for in-situ remediation of petroleum hydrocarbon in groundwater by enhanced anaerobic biotechnology

A technology of osmotic reaction wall and biotechnology, applied in the field of groundwater in-situ remediation, can solve the problems of low solubility of petroleum hydrocarbons, high treatment cost, limited application, etc., to increase hydraulic retention time, accelerate anaerobic degradation efficiency and treatment cost. reduced effect

Active Publication Date: 2017-03-15
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the actual problems in the biodegradation method in the prior art to treat petroleum hydrocarbon-contaminated groundwater: (1) the ex-situ treatment method needs to pump out the groundwater, and the treatment cost is high; (2) the aerobic or anaerobic in-situ bioremediation The technology not only has the problem of low solubility of petroleum hydrocarbons in groundwater and the difficulty of pollutants being degraded by contact with microorganisms, but also has low oxygen mass transfer efficiency in aerobic biological treatment, and the addition of a single electron acceptor in enhanced anaerobic biological treatment leads to treatment Low effect and other defects; the above problems limit the application of biodegradation technology in the in-situ remediation of petroleum hydrocarbon-contaminated groundwater

Method used

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  • Permeable reactive barrier system and method for in-situ remediation of petroleum hydrocarbon in groundwater by enhanced anaerobic biotechnology
  • Permeable reactive barrier system and method for in-situ remediation of petroleum hydrocarbon in groundwater by enhanced anaerobic biotechnology
  • Permeable reactive barrier system and method for in-situ remediation of petroleum hydrocarbon in groundwater by enhanced anaerobic biotechnology

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Effect test

Embodiment 1

[0048] The geological analysis of the implementation area shows that it is composed of sand and clay at about 1.2 meters from the surface to the ground, and low-plastic silty clay at 3 meters underground.

[0049] like figure 1 As shown, the groundwater level 12 fluctuates at approximately 3.1 meters below the ground, and the direction of groundwater flow 10 is as follows figure 1 As shown in the vadose zone 11, monitoring found that the main organic pollutants in the groundwater of the site are petroleum pollutants. In the aquifer 13, there is a petroleum hydrocarbon with a length of about 200 meters, a width of about 130 meters, and a thickness of about 5.9 meters. Pollution plume. Construction of an osmotic reaction wall system for in-situ remediation of petroleum hydrocarbon-contaminated groundwater using enhanced anaerobic biotechnology, including monitoring well 1, well pipe 3 filled with sand 5, baffle 4, water barrier 14 and injection well 2, injection well The wel...

Embodiment 2

[0061] Geological analysis of the implementation area shows that it is composed of sand, gravel and clay from the surface to about 1 meter underground, and is composed of weathered rock at 2.5 meters underground. The groundwater level fluctuates about 2.8 meters below the ground.

[0062] Monitoring found that the main organic pollutant in the groundwater of the site was benzene, and there was a benzene pollution plume about 60 meters long, 40 meters wide and 4 meters thick in the aquifer. Construction of an in-situ osmotic reaction wall system utilizing enhanced anaerobic biotechnology to remediate petroleum hydrocarbon-contaminated groundwater, including monitoring well 1, well pipe 3 filled with sand 5, baffle 4, aquifer 14 and injection well 2; The osmotic reaction wall system is provided with a groove downstream of the groundwater pollution plume 9 and perpendicular to the direction 10 of groundwater flow, the well pipe 3 filled with sand 5 is placed in the groove, and a ...

Embodiment 3

[0074] The geological analysis of the implementation area shows that the geological analysis of the implementation area shows that it is composed of gravel, fine-medium sand and clay at about 1.5 meters from the surface to the ground, and is composed of silt and fine sand at 3.2 meters below the ground. The groundwater level fluctuates about 3.5 meters below the ground.

[0075] Monitoring found that the main organic pollutants in the groundwater of the site were benzene and toluene, and there was a benzene and toluene pollution plume about 160 meters long, 100 meters wide and 5.2 meters thick in the aquifer. Construction of an in-situ osmotic reaction wall system utilizing enhanced anaerobic biotechnology to remediate petroleum hydrocarbon-contaminated groundwater, including monitoring well 1, well pipe 3 filled with sand 5, baffle 4, aquifer 14 and injection well 2; The osmotic reaction wall system is provided with a groove downstream of the groundwater pollution plume 9 and...

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Abstract

The invention discloses a permeable reactive barrier system and a method for in-situ remediation of petroleum hydrocarbon in groundwater by an enhanced anaerobic biotechnology, and belongs to the field of groundwater remediation. Groundwater containing the petroleum hydrocarbon flows through a permeable reactive barrier along the water flow direction, nitrate-reducing bacteria and sulfate-reducing bacteria formed by microorganisms under anaerobic conditions are utilized to degrade the petroleum hydrocarbon in groundwater, and accordingly the purpose of remediation of the petroleum hydrocarbon polluted groundwater is achieved. The permeable reactive barrier system and the method effectively solve the problems of low efficiency and high power consumption in a method for in-situ remediation of the petroleum hydrocarbon in the groundwater with the aid of indigenous microbial flora, and have the advantages of low acting time, high remediation efficiency, strong operability and good remediation effect.

Description

technical field [0001] The invention relates to an in-situ repairing technology of groundwater, and more particularly relates to a system and method for repairing the osmotic reaction wall of petroleum hydrocarbons in groundwater by utilizing enhanced anaerobic biological technology. Specifically, it is an in-situ remediation method for anaerobic biodegradation of petroleum hydrocarbons by activating nitrate-reducing bacteria and sulfate-reducing bacteria in indigenous biological communities in groundwater through enhanced anaerobic microbial technology. Background technique [0002] In petrochemical production areas, gas stations and other places, due to underground operations in the process of oil extraction, leakage of oil and gas gathering and transportation, pipelines, oil tanks or other means of transportation, leakage of oily sewage in sewage pipes and canals, and accidental leakage, etc. , so that a large number of petroleum pollutants enter the soil or groundwater. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34C02F101/32C02F103/36
CPCC02F3/286C02F3/343C02F2101/32C02F2209/001C02F2103/365C02F2305/04
Inventor 王津南吴燕吴超越
Owner NANJING UNIV
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