Three-stage restoration method and three-stage restoration device of organic-chlorohydrocarbon-polluted underground water

Abstract

The invention relates to the field of government of organically polluted underground water and especially relates to a three-stage restoration method and a three-stage restoration device of organic-chlorohydrocarbon-polluted underground water. The method particularly includes following steps: 1) feeding hot air from the bottom of a thermally air-stripping aerating oxidization column, wherein the hot air contacts with polluted underground water in a thermally air-stripping section; 2) carrying out a batch-type aeration operation to the underground water in an aerating oxidization section; 3) feeding the underground water to an ordered mesopore liquid-phase adsorption column and carrying out a deep adsorption process, and if the underground water is qualified, pumping the underground water to a recharge well to enable the underground water to be recharged to an underground water layer, if the underground water is not qualified, feeding the underground water back to the thermally air-stripping aerating oxidization column for reprocessing. Compared with the prior art, the invention is advantaged in that the method and the device are energy-saving and environmental-protective, are free of secondary pollution, have a total removal effect being more than 99%, can achieve continuous underground water restoration, can greatly increase a treatment efficiency of the organically polluted underground water and can save a treatment cost.

Description

Technical field

[0001] The invention relates to the field of organic polluted groundwater treatment, in particular to a three-level repair method and device for groundwater polluted by organic chlorinated hydrocarbons. Background technique

[0002] In recent years, with the development of industrialization and urbanization in China, a large amount of "three wastes" are discharged into the environment every year, which not only causes serious pollution to the soil, but also the direct discharge of wastewater and the infiltration of waste residues through surface water into the ground, causing groundwater. Pollution. According to statistics, 90% of groundwater in my country has been polluted to varying degrees. Especially in northern cities, groundwater is the main source of urban water supply. Groundwater pollution has aggravated the shortage of water resources, posing a serious threat to people's safe water supply, and posing a huge potential harm to the ecological environment. ...

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