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Circulation well method and device for removing pollutants in underground water

A groundwater and pollutant technology, applied in the field of circulating well technology, to achieve the effects of wide adaptability, reducing blindness and increasing reliability

Active Publication Date: 2013-05-22
JIANGSU DDBS ENVIRONMENT REMEDIATION
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Problems solved by technology

Unfortunately, although there are already catalytic heat treatment processes for gaseous organic pollutants, the application of these existing technologies has obvious limitations

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  • Circulation well method and device for removing pollutants in underground water

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Embodiment Construction

[0029]Application of the typical process of the present invention: the circulating well method for removing pollutants in groundwater, if the water is high-concentration organic sewage (COD is greater than 6000mg / L or higher), the present invention is a method that is greater than 100mm and deeper than 100mm in the polluted place. In a well of 1 meter, strong oxidants can be added first (such as Fenton’s reagent, ozone or high oxygen gas aeration, etc.) or ultraviolet photocatalytic oxidation (30~100min); cross aeration or aeration and Blow off and extract for 2~10 cycles, each cycle is 10~100min; add ozone at the air inlet A of the high-pressure air pump 1 for aeration, or add microbial preparations to the special storage tank for biochemical treatment for 10~48h, Then carry out cross aeration or aeration and stripping and extraction for 2 to 10 cycles. After the above treatment, if the COD is below 200mg / L, flocculant flocculation can be carried out.

[0030] The stripping ...

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Abstract

The invention relates to a circulation well method for removing pollutants in underground water. The circulation well is arranged in a polluted place and is in a continuous plum-blossom-shaped, square or hexagonal layout according to soil property, pollution level and radius of influence on soil by equipment. The circulation well is characterized in that 1-N water wells of which the diameter is not smaller than 100 mm and the depth is greater than one meter are drilled, and treatment processes of aeration, air stripping, extraction and dosing are performed to treat the polluted water in the well, wherein the air stripping treatment process: the well water (i.e. underground water) is lifted to the top of the well and is then sprayed downwards through a spray head; in the aeration and extraction treatment processes: the in-well aeration and the air-emptied extraction increase the air-liquid mass transfer interface and enhance the air stripping effect, and the dissolved oxygen content in the underground water is increased in the in-well aeration process, so that the polluted water is placed in an aerobic environment; and in the dosing treatment process: according to different pollution levels and pollutants, oxidizer, a microbial preparation, ozone or / and flocculant are added at an air inlet A of a high-pressure air pump for aeration or in a special dosing pipe.

Description

technical field [0001] The invention relates to a circulating well process for removing pollutants in groundwater, especially volatile organic pollutants, and can also extract VOC (total organic matter) from polluted soil. Background technique [0002] In the treatment of contaminated soil, the groundwater of the contaminated soil site must be treated. If the contaminated soil site after the relocation of many chemical or pesticide companies does not undergo groundwater treatment, the soil treatment work has not been completed at all. In the existing practice of groundwater remediation of contaminated soil sites, many technologies have been adopted. Based on the principle of physical removal of pollutants, aeration technology, air lift technology, and air stripping technology are widely used. Regrettably, although there are catalytic heat treatment processes for gaseous organic pollutants, the application of these existing technologies has obvious limitations. Contents of ...

Claims

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Application Information

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IPC IPC(8): C02F1/20C02F1/32C02F1/461C02F1/52C02F3/34B09C1/00C02F101/30
Inventor 何允玉王铎郭都张坚毅
Owner JIANGSU DDBS ENVIRONMENT REMEDIATION
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