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Remediation system and remediation method for NAPL pollution in underground water based on pollution prevention control

A technology of pollution remediation and remediation method, which is applied to the NAPL pollution remediation system in groundwater based on pollution control and its remediation field, which can solve the problems of poor pertinence, rebound phenomenon, and poor effect.

Pending Publication Date: 2020-10-23
SHANGHAI MUNICIPAL ENG DESIGN INST GRP +1
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  • Abstract
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Problems solved by technology

[0004] The invention provides a NAPL pollution repair system in groundwater based on pollution prevention and control, aiming at the shortcomings of the traditional extraction treatment method, such as poor effect, low pertinence, and frequent rebound phenomenon.

Method used

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  • Remediation system and remediation method for NAPL pollution in underground water based on pollution prevention control
  • Remediation system and remediation method for NAPL pollution in underground water based on pollution prevention control

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Embodiment Construction

[0033] Refer to attached figure 1 to attach figure 2 With embodiment, the present invention is described in further detail:

[0034] In a specific embodiment, the vertical barrier wall 2 is made of HDPE geomembrane with a thickness of 2 mm. Its upper end is 300 mm above the ground surface and is flush with the well platform of the pumping unit 3. The lower end is buried in the aquifer water-resistant floor 5 of the contaminated area. Folded 100mm to prevent the influence of foundation deformation, the vertical barrier wall mainly plays the role of blocking the polluted groundwater, separating the uncontaminated area 1 and the polluted area 6, and preventing the further spread of pollution. Wherein, "water-resisting bottom plate 7" refers to the water-resisting layer at the bottom of the aquifer. The vertical barrier wall 2 can also use other materials with waterproof barrier effect, but the performance of HDPE geomembrane is more excellent.

[0035] The pumping unit 3 pump...

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Abstract

The invention discloses a remediation system for NAPL pollution in underground water based on pollution prevention control. The system comprises a vertical barrier wall for blocking polluted underground water in the vertical barrier wall; a water pumping unit which is used for pumping out underground water in the polluted area and providing pressure difference for pollutants to flow through a vertical treatment system; a vertical treatment unit which is used for treating the polluted underground water to remove NAPL; and a recharging unit which is used for pumping out the water treated by thevertical treatment unit and recharging the water to a target water-containing layer of the polluted area. The invention provides the remediation system suitable for NAPL pollution in underground waterof various NAPL pollution types and different pollution depths in order to overcome the defects that a traditional extraction treatment method is poor in effect, low in pertinence and prone to rebounding. The method can be used for repairing DNAPL pollution in underground water and repairing LNAPL pollution, and NAPL pollutants with different pollution depths in underground water can be flexiblyand effectively repaired and removed.

Description

technical field [0001] The invention relates to the field of groundwater restoration, and discloses a NAPL pollution restoration system in groundwater based on pollution prevention and control and a restoration method thereof. Background technique [0002] In recent years, with the development of industry and agriculture, groundwater pollution has gradually increased, which has become a research hotspot at home and abroad. The most difficult to control and the most harmful in groundwater is organic pollution, especially non-aqueous phase liquid (NAPL). According to the relative density of water, NAPL is divided into LNAPL (light weight) and DNAPL (heavy weight). This kind of organic matter has low water solubility and is not easy to degrade and remove. Most of them have carcinogenic, teratogenic and mutagenic hazards. [0003] LNAPL pollutants have the characteristics of small specific gravity and immiscibility in water. The migration of LNAPL in the aquifer is controlled b...

Claims

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Application Information

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IPC IPC(8): C02F1/58C02F103/06
CPCC02F1/58C02F2103/06Y02A20/406
Inventor 向甲甲殷瑶谭学军朱煜张辰
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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