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System and method for repairing polluted underground water by using discontinuous permeation reaction walls

A technology of infiltration reaction wall and groundwater, which is applied in the field of in-situ remediation of polluted groundwater and discontinuous infiltration reaction wall in the field of remediation of polluted groundwater, can solve problems such as shortening construction period, wall blockage, difficulties, etc., and achieve the effect of improving remediation efficiency.

Active Publication Date: 2016-11-23
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the system for repairing polluted groundwater with the discontinuous permeable reaction wall described in this application does not require deep trenching, which greatly shortens the construction period and saves costs. Solve the problems of traditional PRB technology that the medium in the wall is deactivated and difficult to replace, and the wall is blocked

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  • System and method for repairing polluted underground water by using discontinuous permeation reaction walls

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Embodiment 1

[0043] This embodiment provides a system for repairing polluted groundwater with a discontinuous osmotic reaction wall, including an injection unit and an injection well group.

[0044] The system for repairing polluted groundwater using the discontinuous seepage reaction wall repairs the groundwater of a landfill site polluted by hexavalent chromium. The groundwater of the site is polluted by hexavalent chromium, and the pollution depth exceeds 10m. When the chromium concentration exceeds 100mg / L, EHC agent (provided by Beijing Yiwei Kaimu Environmental Technology Co., Ltd.) is selected as the restoration agent to reduce hexavalent chromium to trivalent chromium and reduce toxicity.

[0045] The method for repairing polluted groundwater by the discontinuous osmotic reaction wall comprises the following steps:

[0046] (1) Pollution investigation of groundwater on site

[0047] According to the requirements of the "Technical Guidelines for Site Environmental Investigation" (H...

Embodiment 2

[0063] This embodiment provides a system for repairing polluted groundwater with a discontinuous osmotic reaction wall, including an injection unit, a group of injection wells and a monitoring well.

[0064] Use the system for repairing polluted groundwater with discontinuous osmotic reaction walls to repair the groundwater in a landfill site. The groundwater in this site is polluted by nitrate, the pollution depth exceeds 15m, and the nitrate concentration exceeds 50mg / L. The emulsified vegetable oil is used as a restoration agent, and it is used as a carbon source to increase the activity and quantity of denitrifying bacteria in the underground area of ​​the site, and the denitrifying bacteria are used to denitrify nitrate, so that the concentration of nitrate in groundwater is reduced.

[0065] The method for repairing polluted groundwater by the discontinuous osmotic reaction wall comprises the following steps:

[0066] (1) Pollution investigation of groundwater on site

...

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Abstract

The invention provides a system for repairing polluted underground water by using discontinuous permeation reaction walls. Repairing chemicals are injected into injection walls by high-pressure pumps under a certain pressure, so that the repairing chemicals are sprayed out from water outlet holes of the injection wells and are uniformly diffused all around, the diffusion ranges of the repairing chemicals sprayed out from the adjacent injection wells are overlapped to form repairing reaction zones which are perpendicular to the underground water flowing direction and are similar to walls, and therefore, the underground water passing through the repairing reaction zones is repaired. The system for repairing the polluted underground water by using the discontinuous permeation reaction walls is simple to construct, a repairing material is convenient to change, a repairing blind zone does not exist, and the repairing efficiency of the polluted underground water reaches up to 80%-99%.

Description

technical field [0001] The invention relates to a system and a method for repairing polluted groundwater by a discontinuous osmotic reaction wall, which belongs to the in-situ repair technology of polluted groundwater. Background technique [0002] As a precious fresh water resource for human beings, groundwater has been polluted to varying degrees with the continuous development of industrialization in modern society. Since the 1960s, groundwater pollution has gradually increased, so groundwater restoration technology has also been developed. [0003] Groundwater pollution remediation technologies include ex-situ remediation, in-situ remediation and monitoring natural attenuation technologies. Ex-situ remediation technology is a technology that pumps contaminated groundwater to the surface for treatment. This technology has a large processing capacity and high processing efficiency in a short period of time, but long-term application generally has phenomena such as tailin...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F3/34
Inventor 高艳丽李书鹏张秋子孙尧全燕苹魏晓飞王璇李洪毅
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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