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A three-stage remediation method and device for groundwater polluted by organic chlorinated hydrocarbons

A restoration method and groundwater technology, applied in the direction of contaminated groundwater/leachate treatment, water/sewage multi-stage treatment, water pollutants, etc., can solve the problems of increasing the difficulty and cost of groundwater restoration, and achieve simple structure and convenient operation , good removal effect

Active Publication Date: 2016-01-20
JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After the formation of DNAPL, it is slowly released into the groundwater, especially in the case of complex hydrogeology, which will increase the difficulty and cost of groundwater restoration

Method used

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  • A three-stage remediation method and device for groundwater polluted by organic chlorinated hydrocarbons
  • A three-stage remediation method and device for groundwater polluted by organic chlorinated hydrocarbons
  • A three-stage remediation method and device for groundwater polluted by organic chlorinated hydrocarbons

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specific Embodiment

[0042] Specific embodiment: the groundwater polluted by chlorinated hydrocarbons (wherein: 2.98mg / L of trichlorethylene, 260mg / L of tetrachlorethylene, 49.1mg / L of 1,2-dichloroethane) is pumped and sent into the thermal blowing off aeration oxidation tower 4, and at the same time pass hot air at 35°C to 50°C and 250 to 300mmAq in the aeration oxidation section for intermittent aeration, and intermittently pass into an oxidant to carry out the oxidation reaction, and every aeration is 30 minutes, The oxidant was fed for 10 minutes, the oxidant was Fenton’s reagent, the gas-water ratio was controlled to be 10, and after the system reached stability, the effluent of thermal blowing and aeration oxidation tower 4 was detected: the concentration of trichlorethylene was about 0.057mg / L, and the concentration of tetrachlorethylene was about 0.057mg / L. The concentration is 0.41mg / L, the concentration of 1,2-dichloroethane is 0.023mg / L, and the overall removal effect reaches over 99%. I...

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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 organically polluted groundwater treatment, in particular to a three-stage restoration method and device for groundwater polluted by organic chlorinated hydrocarbons. Background technique [0002] In recent years, with the development of industrialization and urbanization in our country, a large number 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 waste water and the infiltration of waste residues into the ground through surface water have caused groundwater pollution. pollution. According to statistics, 90% of the groundwater in my country has been polluted to varying degrees. Especially in northern cities, groundwater is the main source of urban water supply. The pollution of groundwater aggravates the shortage of water resources, poses a serious threat to people's safe water supply, and poses a huge potenti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/20C02F1/72C02F1/78C02F101/36C02F103/06
CPCY02W10/37
Inventor 钟晓梅唐晓声姚凯李海建
Owner JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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