Process for remediation of volatile organic pollutants in groundwater

A volatile organic and groundwater technology, applied in the treatment of polluted groundwater/leachate, flotation water/sewage treatment, etc., can solve the problems of rapid decline of pollutant concentration, impact on groundwater flow field, slow release of pollutants, etc. , to achieve good repair effect, fast processing speed, and fast removal effect

Active Publication Date: 2016-06-15
JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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Problems solved by technology

The extraction-treatment technology needs to extract a large amount of groundwater, which will affect the surrounding groundwater flow field, and because the underground water-bearing medium is a solid-liquid two-phase, the pollutants in the liquid phase are easily extracted for post-treatment, while the pollutants in the solid phase The release is relatively slow, resulting in a tailing phenomenon in which the concentration of pollutants decreases rapidly in the early stage and the concentration in the later stage decreases relatively slowly during the application of extraction-treatment technology

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  • Process for remediation of volatile organic pollutants in groundwater

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Effect test

Embodiment 1

[0029] Processes for remediation of volatile organic pollutants in groundwater:

[0030] (1) Use the extraction well to extract the groundwater polluted by volatile organic pollutants at a certain flow rate and inject it into the surface aeration tank;

[0031] (2) Utilize blower or stripping tower to aerate the polluted water in the aeration tank;

[0032] (3) re-inject the polluted water after aeration into the ground at a certain flow rate through the injection well;

[0033] Wherein, the extraction well is set at the most serious groundwater pollution plume; the injection well is respectively set at the upstream and downstream of the groundwater pollution plume;

[0034] The flow rate in the steps (1) and (3) should be reasonably determined according to the layout of extraction wells and injection wells, so as to reduce the impact on the groundwater flow field as much as possible.

[0035] The aeration requirement in the described step (2) is: the water aeration rate per...

Embodiment 2

[0038] Processes for remediation of volatile organic pollutants in groundwater:

[0039] (1) Use the extraction well to extract the groundwater polluted by volatile organic pollutants at a certain flow rate and inject it into the surface aeration tank;

[0040] (2) Use a blower or a blow-off tower to aerate the polluted water in the aeration tank for a period of time;

[0041] (3) re-inject the polluted water after aeration into the ground at a certain flow rate through the injection well;

[0042] Wherein, the extraction well is set at the most serious groundwater pollution plume; the injection well is respectively set at the upstream and downstream of the groundwater pollution plume;

[0043] The flow rate in the steps (1) and (3) should be reasonably determined according to the layout of extraction wells and injection wells, so as to reduce the impact on the groundwater flow field as much as possible.

[0044] The aeration requirement in the described step (2) is: the wat...

Embodiment 3

[0047] Processes for remediation of volatile organic pollutants in groundwater:

[0048] (1) Use the extraction well to extract the groundwater polluted by volatile organic pollutants at a certain flow rate and inject it into the surface aeration tank;

[0049] (2) Use a blower or a blow-off tower to aerate the polluted water in the aeration tank for a period of time;

[0050] (3) re-inject the polluted water after aeration into the ground at a certain flow rate through the injection well;

[0051] Wherein, the extraction well is set at the most serious groundwater pollution plume; the injection well is respectively set at the upstream and downstream of the groundwater pollution plume;

[0052] The flow rate in the steps (1) and (3) should be reasonably determined according to the layout of extraction wells and injection wells, so as to reduce the impact on the groundwater flow field as much as possible.

[0053] The aeration requirement in the described step (2) is: the aer...

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Abstract

The invention aims at providing a process for repairing volatile organic pollutants in underground water. Polluted underground water is extracted to the earth surface; pollutants in the underground water are removed on the earth surface in an aeration manner; and the processed underground water is recharged to the underground water again. By adopting reasonably optimized layout and flow of an extraction well and an injection well, the range of the pollutants can be prevented from further diffusing; the hydraulic slope of an underground water flow field is increased by extraction and injection; the flow velocity of the underground water is increased; pollutants in the underground water can be rapidly removed; and the underground water within the pollution range is injected into the underground water after being extracted, so that the underground water extraction amount in the overall restoration work is reduced. After implementation of the process, the volatile organic pollutants in the underground water can be effectively reduced; the removal rate of the organic pollutants after single extraction-aeration-injection is greater than 30% in general; and the removal rate of the organic pollutants after extraction-aeration-injection for a plurality of times is greater than 80%.

Description

technical field [0001] The invention relates to the field of environmental restoration, in particular to a process for restoration of volatile organic pollutants in groundwater. Background technique [0002] Generally speaking, groundwater resources play an important role in my country's economic development and national life, but the current situation of groundwater pollution in my country is not optimistic, and some industries threaten the safety of groundwater environment. In 2009, more than 200 million tons of industrial solid waste across the country had not been effectively comprehensively utilized or disposed of, and incidents of leakage of chromium slag and manganese slag dumps to pollute groundwater occurred from time to time; the exploration, mining and production activities of the petrochemical industry significantly affected the quality of groundwater, come on The problem of station leakage polluting groundwater has become increasingly prominent. [0003] With t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/24C02F103/06
CPCC02F1/24C02F2103/06
Inventor 陈荦唐晓声
Owner JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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