CN113800657B - In-situ treatment method and treatment device for underground water DNAPLS - Google Patents
In-situ treatment method and treatment device for underground water DNAPLS Download PDFInfo
- Publication number
- CN113800657B CN113800657B CN202111186245.4A CN202111186245A CN113800657B CN 113800657 B CN113800657 B CN 113800657B CN 202111186245 A CN202111186245 A CN 202111186245A CN 113800657 B CN113800657 B CN 113800657B
- Authority
- CN
- China
- Prior art keywords
- absorption
- absorbent
- pipeline
- aeration
- dnapls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses an in-situ treatment method and a treatment device for underground water DNAs PLs, and relates to the technical field of water treatment. The method for in-situ treatment of groundwater DNAs comprises the following steps: extending an absorption pipeline to the bottom of the extraction well, introducing an absorbent into the absorption pipeline, and then aerating in the absorption pipeline; after the aeration is finished, extracting the absorbent; wherein, the absorbent is an organic solvent which has density lower than that of water and is not mutually soluble with water. The method comprises the steps of treating the DNAPLS phases by using a physical absorption method, stirring the bottom DNAPLS phases by using an aeration method to make the bottom DNAPLS phases turn and surge, contacting and absorbing with an absorbent in an absorption pipe, and pumping out the absorbent after aeration is completed.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to an in-situ treatment method and a treatment device for underground water DNAs PLs.
Background
Petrochemicals and petrochemical products often contaminate soil, aquifers and groundwater in the form of non-aqueous liquids (NAPLs). Dense non-aqueous phase liquids (DNAPLs) with density greater than water are often deposited on a water-isolated bottom plate, and because the distribution is dispersed and the buried depth is deep, incompletely processed DNAPLs are compatible and easily cause repeated pollution. The DNAPLS phase is usually difficult to be treated by a multiphase extraction mode, and for the DNAPLS phase with deeper burial depth, the DNAPLS phase cannot be treated by a complete extraction-ectopic treatment mode, and even if a submersible pump-water pump combined mode is adopted, the problem of incomplete extraction exists.
At present, the treatment of the DNAPLS phase mainly adopts a circulating well technology, and the repair is carried out in a mode of adding medicaments in situ, and a part of the treatment also adopts an electrochemical mode. The method is not only by chemical agents or electrochemistry, but also brings higher operation cost, and can damage the ecology of a repair site, so that the method is not ideal in economic benefit. Therefore, groundwater DNAPLs phase remediation requires processes and equipment that are less expensive to operate.
In view of this, the invention is particularly proposed.
Disclosure of Invention
The invention aims to provide an in-situ treatment method and a treatment device for underground water DNAs PLS, aiming at reducing the operation cost and realizing good phase treatment effect of DNAs PLS.
The invention is realized by the following steps:
in a first aspect, the present invention provides a method for in situ treatment of groundwater DNAPLs, comprising: extending an absorption pipeline to the bottom of the extraction well, introducing an absorbent into the absorption pipeline, and then aerating in the absorption pipeline; after the aeration is finished, extracting the absorbent; the aeration absorption is carried out by a plurality of circulations, and each circulation comprises: introducing an absorbent into the absorption pipeline, and then aerating in the absorption pipeline; after aeration is finished, standing and layering are carried out, and an absorbent is extracted;
wherein the absorbent is an organic solvent which has a density lower than that of water and is immiscible with water.
In an alternative embodiment, the standing time is greater than 1 hour; preferably, aeration is performed at the bottom end position of the absorption line.
In alternative embodiments, the aeration time is 0.5 to 3 hours; preferably 1-2h.
In an alternative embodiment, the amount of absorbent added per cycle is controlled to be 2-10cm above the water level in the absorption line.
In an alternative embodiment, after the absorbent is withdrawn, the next cycle is performed after the water level is replenished above the inlet point of the line for withdrawing absorbent.
In an alternative embodiment, the absorbent is an organic solvent that is less dense than water and immiscible with water.
In an alternative embodiment, the absorption pipeline comprises an absorption outer pipe and an absorption inner pipe for introducing an absorbent, the absorption inner pipe is positioned in the absorption outer pipe to form a sleeve structure, and the bottom end of the absorption inner pipe is higher than the bottom end of the absorption outer pipe; a plurality of sieve holes are arranged on the side wall of the bottom of the absorption outer tube.
In an alternative embodiment, a radial water-stop sheet is arranged between the absorption inner pipe and the absorption outer pipe, and the radial water-stop sheet is positioned above the topmost sieve mesh of the absorption outer pipe.
In a second aspect, the present invention provides a treatment apparatus for implementing the method for in-situ treatment of groundwater DNAPLs according to any one of the preceding embodiments, comprising an absorption pipeline, an absorbent inlet pipeline, a liquid outlet pipeline, and an aeration pipeline; the absorbent liquid inlet pipeline, the absorbent liquid outlet pipeline and the aeration pipeline all extend into the absorption pipeline, and the bottom pipe orifice position of the absorbent liquid outlet pipeline is lower than that of the absorbent liquid inlet pipeline.
In an alternative embodiment, the aeration line extends to the bottom within the absorption line.
The invention has the following beneficial effects: the inventor creatively utilizes a physical absorption method to process the DNAPLS phase, utilizes an aeration method to stir the bottom DNAPLS phase to surge, contacts with the absorbent in the absorption pipe for absorption, and carries out aeration absorption in a plurality of cycles, and the absorbent is extracted after aeration is finished. The processing method provided by the embodiment of the invention can obviously reduce the processing cost, can well remove the DNAPLS phase and has good application prospect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram illustrating the operation of an in-situ treatment apparatus for groundwater DNAs.
Icon: 110-an absorption line; 111-an absorption outer tube; 112-an absorption inner tube; 113-radial water stop sheet; 114-mesh screen; 120-absorbent inlet line; 130-a liquid outlet pipeline; 140-aeration line.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
An embodiment of the present invention provides an in-situ treatment apparatus for underground water DNAPLs, as shown in fig. 1, the treatment apparatus includes an absorption pipeline 110, an absorbent inlet pipeline 120, a liquid outlet pipeline 130, and an aeration pipeline 140.
When in use, the absorption pipeline 110 extends into the bottom of the extraction well, the absorbent is introduced into the absorption pipeline 110 by using the absorbent inlet pipeline 120, and then aeration is carried out in the absorption pipeline 110 by using the aeration pipeline 140; after the aeration is completed, the absorbent is pumped out through the liquid outlet line 130. Therefore, the bottom nozzle of the outlet pipe 130 is located below the bottom level of the absorbent to extract the upper aqueous phase and the absorbent, so as to ensure the complete extraction of the absorbent.
The absorbent is an organic solvent having a density lower than that of water and immiscible with water, such as diesel oil, toluene, and the like, and is not limited herein.
Specifically, the absorbent inlet pipe 120, the liquid outlet pipe 130 and the aeration pipe 140 all extend into the absorption pipe 110, and the bottom nozzle position of the liquid outlet pipe 130 is lower than that of the absorbent inlet pipe 120. After the absorption pipeline 110 is extended to the bottom of the extraction well, a water level with a certain height exists in the absorption pipeline 110, and the absorbent is located above the water level after the absorbent is added, so that the bottom orifice of the absorbent inlet pipeline 120 is higher, and the bottom orifice of the absorbent outlet pipeline 130 is lower in order to ensure that the absorbent is completely extracted.
In some embodiments, aeration line 140 extends to the bottom within aspiration line 110 to provide aeration in the bottom region of aspiration line 110 for bubbling through the bottom DNAPLs into contact with the absorbent.
In some embodiments, the absorption pipeline 110 includes an absorption outer tube 111 and an absorption inner tube 112 for introducing an absorbent, the absorption inner tube 112 is located inside the absorption outer tube 111 to form a sleeve structure, and a bottom end of the absorption inner tube 112 is higher than a bottom end of the absorption outer tube 111; a plurality of sieve holes 114 are provided on the bottom side wall of the absorption outer tube 111. The absorption pipeline 110 is designed to be of a sleeve structure, so that aeration can be performed for multiple times in a circulating manner to improve the absorption effect.
Specifically, aeration and the addition of the absorbent are both performed in the absorption inner tube 112, a certain amount of water exists between the absorption outer tube 111 and the absorption inner tube 112, and the water in the well can enter the absorption outer tube 111 through the sieve holes 114 on the side wall of the bottom of the absorption outer tube, so that the water level in the absorption inner tube 112 is supplemented after the absorbent is extracted.
In some embodiments, a radial water stop sheet 113 is disposed between the absorption inner tube 112 and the absorption outer tube 111, and the radial water stop sheet 113 is located above the topmost screen of the absorption outer tube 111. When the absorption inner pipe 112 is damaged, the radial water stop sheet 113 can prevent the absorbent from leaking to pollute the water body. Therefore, the position where the radial water stop sheet 113 is provided may be slightly higher than the position of the uppermost portion of the sieve hole 114.
It should be added that the treatment device is operated intermittently during use, valves for adjusting the switches are disposed on the absorption pipeline 110, the absorbent inlet pipeline 120, the liquid outlet pipeline 130 and the aeration pipeline 140, and the liquid outlet pipeline 130 can be connected to a pump for providing power. After the water layer is stabilized, a certain amount of absorbent solvent is added firstly, then the absorbent liquid inlet pipeline 120 is closed, and the aeration pipeline 140 is opened to introduce air to start aeration.
In some embodiments, the top height of the absorption inner tube 112 is higher than the top height of the absorption outer tube 111.
The embodiment of the invention also provides an in-situ treatment method of underground water DNAs, which utilizes the in-situ treatment device of underground water DNAs to carry out treatment and comprises the following steps: extending the absorption pipeline 110 to the bottom of the extraction well, introducing an absorbent into the absorption pipeline 110, and then aerating in the absorption pipeline 110; after the aeration is completed, the absorbent is withdrawn. And (3) processing the DNAPLs by using a physical absorption method, stirring the bottom DNAPLs by using an aeration method to make the bottom DNAPLs flush, contacting and absorbing with an absorbent in an absorption pipe, and extracting the absorbent after the aeration is finished.
In some embodiments, for better absorption, the aeration absorption is divided into a plurality of cycles, each cycle comprising: introducing an absorbent into the absorption pipeline 110, and then aerating in the absorption pipeline 110; after the aeration is finished, standing and layering are carried out, and the absorbent is extracted. The absorption effect of the DNAPLS phase can be obviously improved through repeated operation of a plurality of cycles, the cycle number is not limited, and the removal rate required is achieved. Specifically, the standing time is preferably more than 1h, so that the water and the absorbent are fully layered.
Further, it is necessary to wait for the liquid level of the absorption inner tube 112 to reach above the inlet position of the liquid outlet line 130 between two cycles, and generally wait for more than 0.5h after the absorbent is pumped out.
In order to sufficiently flush the bottom DNAPLs phase, aeration is preferably performed at the bottom position of the absorption pipe 110, i.e., the absorption inner pipe 112.
Further, the aeration time is 0.5-3h; preferably 1-2h, the effect of absorption can be further enhanced by controlling the absorption time in each cycle. The aeration time may be 0.5h, 1.0h, 1.5h, 2.0h, 2.5h, 3.0h, etc., or any value between the above adjacent time values. The aeration flow rate is 0.5-1.5L/min, such as 0.5L/min, 1.0L/min, 1.5L/min, etc.
Further, the adding amount of the absorbent in each cycle is controlled to be 2-10cm higher than the water surface in the absorption pipeline 110, such as 2cm, 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, 9cm, 2cm, 10cm and the like, and the absorption effect can be further improved by further controlling the using amount of the absorbent.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The present embodiment provides an in-situ processing method of underground water DNAPLs, which utilizes the apparatus in fig. 1 to perform processing, and specifically includes the following steps:
(1) Constructing a model: in a sand box of 1.6m × 0.8m × 1.2m, a clay layer of about 0.2m is laid on the bottom (the top is equivalent to the water separation layer in fig. 1), sand soil of about 0.9m is laid on the middle layer, surface soil of about 0.1m is laid on the upper layer, and the total water level is added to the position of 1.0m of the height of the sand box. Injecting 1,2-dichloroethane at a preselected point, wherein the injection depth is 1.0m, opening a well at the preselected point after injection, measuring the concentration of 1,2-dichloroethane at 1.0m in the water body by 412ug/L, and measuring the concentration of 1,2-dichloroethane at 1.0m in the water body by 399ug/L after placing for 3 days.
(2) In-situ treatment: the casing processing device in the figure 1 is arranged in a well, and the total burial depth is 1.0m; adding absorbent (toluene) with a height of about 5cm, closing the absorbent inlet, aerating from the air inlet at an aeration flow rate of 1.0L/min for 2h, then closing the gas pipeline, pumping out liquid from the liquid outlet, standing for 1.0h, adding absorbent again, and circulating. After circulating for 20 times, no absorbent is added, standing for 3 days, and sampling and detecting.
The results show that: 1,2-dichloroethane concentration 57ug/L was measured, the removal rate was 85.7%, and no absorbent residue was detected.
Example 2
The present embodiment provides an in-situ processing method of underground water DNAPLs, which utilizes the apparatus in fig. 1 to perform processing, and specifically includes the following steps:
(1) Constructing a model: in a sand box with the height of 1.6m multiplied by 0.8m multiplied by 1.2m, a clay layer with the thickness of about 0.2m is paved at the bottom, sandy soil with the thickness of about 0.9m is paved at the middle layer, surface soil with the thickness of about 0.1m is paved at the upper layer, and the total water level is added to the position with the height of 1.0m of the sand box. Injecting 1,1,2-trichloroethane at a preselected point, wherein the injection depth is 1.0m, opening a well at the preselected point after injection, measuring 1,1,2-trichloroethane concentration 653ug/L of a water body at 1.0m, and measuring 1,1,2-trichloroethane concentration 610ug/L of the water body at 1.0m after placing for 3 days.
(2) In-situ treatment: placing the casing pipe processing device in the figure 1 into a well, wherein the total buried depth is 1.0m; adding absorbent with height of about 8cm, closing the absorbent inlet, aerating from the air inlet with aeration flow of 1.0L/min for 3h, then closing the gas pipeline, pumping out liquid from the liquid outlet, standing for 1h, and adding solvent again to circulate. After 30 times of circulation, no solvent is added, standing for 3 days, and sampling and detecting.
The results show that: 1,1,2-trichloroethane concentration 71ug/L was measured, the removal rate was 88.4%, and no absorbent residue was detected.
Example 3
The present embodiment provides an in-situ processing method of underground water DNAPLs, which utilizes the apparatus in fig. 1 to perform processing, and specifically includes the following steps:
(1) Constructing a model: in a sand box with the height of 1.6m multiplied by 0.8m multiplied by 1.2m, a clay layer with the thickness of about 0.2m is paved at the bottom, sandy soil with the thickness of about 0.9m is paved at the middle layer, surface soil with the thickness of about 0.1m is paved at the upper layer, and the total water level is added to the position with the height of 1.0m of the sand box. Injecting 1,2-dichloropropane at a preselected point, wherein the injection depth is 1.0m, opening a well at the preselected point after injection, measuring the concentration of 1,2-dichloropropane at 1.0m in a water body at 703ug/L, and measuring the concentration of 1,2-dichloropropane at 686ug/L at 1.0m in the water body after placing for 3 days.
(2) In-situ treatment: the casing processing device in the figure 1 is arranged in a well, and the total burial depth is 1.0m; adding absorbent with height of about 2cm, closing absorbent inlet, aerating from air inlet with aeration flow of 1.0L/min for 2 hr, then closing gas pipeline, pumping out liquid from liquid outlet, standing for 0.5 hr, adding solvent again, and circulating. After circulating for 15 times, no solvent is added, standing for 3 days, and sampling and detecting.
The results show that: the 1,2-dichloropropane concentration was found to be 245ug/L, the removal rate was found to be 64.3%, and no absorbent residue was detected.
Example 4
The present embodiment provides an in-situ processing method of underground water DNAPLs, which utilizes the apparatus in fig. 1 to perform processing, and specifically includes the following steps:
(1) Constructing a model: in a sand box with the height of 1.6m multiplied by 0.8m multiplied by 1.2m, a clay layer with the thickness of about 0.2m is paved at the bottom, sandy soil with the thickness of about 0.9m is paved at the middle layer, surface soil with the thickness of about 0.1m is paved at the upper layer, and the total water level is added to the position with the height of 1.0m of the sand box. Injecting 1,2-dichloroethylene at a preselected point, wherein the injection depth is 1.0m, opening a well at the preselected point after injection, measuring the concentration of 1,2-dichloroethylene at 1.0m of a water body, and measuring the concentration of 1,2-dichloroethylene at 1.0m of the water body after placing for 3 days.
(2) In-situ treatment: placing the casing pipe processing device in the figure 1 into a well, wherein the total buried depth is 1.0m; adding absorbent with height of about 8cm, closing absorbent inlet, aerating from air inlet with aeration flow rate of 1.0L/min for 3 hr, then closing gas pipeline, pumping out liquid from liquid outlet, standing for 0.5 hr, adding solvent again, and circulating. After circulating for 20 times, no solvent is added, standing for 3 days, and sampling and detecting.
The results show that: 1,2-dichloroethylene concentration of 154ug/L was measured, the removal rate was 74.2%, and no absorbent residue was detected.
Example 5
The embodiment provides an in-situ treatment method of underground water DNAPLs, which uses the apparatus in fig. 1 for treatment, and specifically includes the following steps:
(1) Model construction: in a sand box with the height of 1.6m multiplied by 0.8m multiplied by 1.2m, a clay layer with the thickness of about 0.2m is paved at the bottom, sandy soil with the thickness of about 0.9m is paved at the middle layer, surface soil with the thickness of about 0.1m is paved at the upper layer, and the total water level is added to the position with the height of 1.0m of the sand box. Chlorobenzene is injected into a preselected point, the injection depth is 1.0m, a well is opened at the preselected point after injection, the chlorobenzene concentration of water body at 1.0m is measured by 6213ug/L, and the chlorobenzene concentration of water body at 1.0m is measured by 6077ug/L after the well is placed for 3 days.
(2) In-situ treatment: the casing processing device in the figure 1 is arranged in a well, and the total burial depth is 1.0m; adding absorbent with height of about 5cm, closing absorbent inlet, aerating from air inlet with aeration flow rate of 1.0L/min for 2 hr, then closing gas pipeline, pumping out liquid from liquid outlet, standing for 0.5 hr, adding solvent again, and circulating. After circulating for 20 times, no solvent is added, standing for 3 days, and sampling and detecting.
The results show that: the chlorobenzene concentration was found to be 2054ug/L, the removal rate was 66.2%, and no absorbent residue was detected.
In summary, the present invention provides an in-situ treatment method and a treatment apparatus for DNAPLs in underground water, the inventor creatively uses a physical absorption method to treat DNAPLs, uses an aeration method to stir the bottom DNAPLs to tumble, contacts and absorbs with an absorbent in an absorption tube, and extracts the absorbent after aeration is completed. Can obviously reduce the processing cost, can well remove the DNAPLS phase and has good application prospect.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An in-situ treatment method for underground water DNAs PLs, which is characterized by comprising the following steps: extending an absorption pipeline to the bottom of an extraction well, introducing an absorbent into the absorption pipeline, and then aerating in the absorption pipeline; after the aeration is finished, extracting the absorbent; the aeration absorption is carried out by a plurality of cycles, and each cycle comprises: introducing an absorbent into the absorption pipeline, and then aerating in the absorption pipeline; after aeration is finished, standing and layering are carried out, and an absorbent is extracted;
wherein the absorbent is an organic solvent which has a density lower than that of water and is immiscible with water;
aerating at the bottom end of the absorption pipeline;
the absorption pipeline comprises an absorption outer pipe and an absorption inner pipe for introducing an absorbent, the absorption inner pipe is positioned in the absorption outer pipe to form a sleeve structure, and the bottom end of the absorption inner pipe is higher than that of the absorption outer pipe; a plurality of sieve pores are arranged on the side wall of the bottom of the absorption outer tube;
a radial water stop plate is arranged between the absorption inner pipe and the absorption outer pipe and is positioned above a sieve mesh at the topmost part of the absorption outer pipe;
the treatment device for implementing the underground water DNAPLS in-situ treatment method comprises an absorption pipeline, an absorbent liquid inlet pipeline, a liquid outlet pipeline and an aeration pipeline;
the absorbent liquid inlet pipeline, the absorbent liquid outlet pipeline and the aeration pipeline all extend into the absorption pipeline, and the position of a bottom pipe orifice of the absorbent liquid outlet pipeline is lower than that of the bottom pipe orifice of the absorbent liquid inlet pipeline;
the aeration pipeline extends into the bottom in the absorption pipeline.
2. The in situ treatment method of groundwater DNAPLs according to claim 1, wherein the standing time is greater than 1h.
3. The in situ treatment method of groundwater DNAPLs according to claim 2, wherein the aeration time is 0.5-3h.
4. The in situ treatment method of groundwater DNAPLs according to claim 2, wherein aeration time is 1-2h.
5. The in situ treatment method of groundwater DNAPLs according to claim 2, wherein aeration flow rate is 0.5-1.5L/min.
6. The method of in situ treatment of groundwater DNAPLs as claimed in claim 2, wherein the amount of the absorbent added in each cycle is controlled to be 2-10cm above the water level in the absorption pipeline.
7. The method of in situ treatment of groundwater DNAPLs as recited in claim 2, wherein after the absorbent is pumped out, the next cycle is performed after the water level is replenished above the inlet of the pipeline for pumping out the absorbent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111186245.4A CN113800657B (en) | 2021-10-12 | 2021-10-12 | In-situ treatment method and treatment device for underground water DNAPLS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111186245.4A CN113800657B (en) | 2021-10-12 | 2021-10-12 | In-situ treatment method and treatment device for underground water DNAPLS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113800657A CN113800657A (en) | 2021-12-17 |
| CN113800657B true CN113800657B (en) | 2022-11-04 |
Family
ID=78897555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111186245.4A Active CN113800657B (en) | 2021-10-12 | 2021-10-12 | In-situ treatment method and treatment device for underground water DNAPLS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113800657B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3728510B2 (en) * | 2003-03-20 | 2005-12-21 | 武 長谷川 | Soil pollution countermeasure method and soil pollution countermeasure system |
| US7659123B2 (en) * | 2004-08-31 | 2010-02-09 | Enchem Engineering, Inc. | In situ remedial alternative and aquifer properties evaluation probe system |
| US7824453B2 (en) * | 2006-09-08 | 2010-11-02 | Marathon Oil Canada Corporation | Biodiesel production and use in oil sands processing |
| WO2008123393A1 (en) * | 2007-03-29 | 2008-10-16 | Ehime University | Method of extracting polychlorinated biphenyl |
| CN103112915B (en) * | 2013-02-19 | 2014-04-16 | 江苏大地益源环境修复有限公司 | Circulation well method and device for removing pollutants in underground water |
| CN110157478B (en) * | 2018-02-11 | 2021-04-06 | 中国石油化工股份有限公司 | Pretreatment method of coal tar raw material |
| CN111360052A (en) * | 2020-04-13 | 2020-07-03 | 上海市城市建设设计研究总院（集团）有限公司 | Multi-layer circulating well system for soil and underground water remediation |
| CN111646577A (en) * | 2020-05-18 | 2020-09-11 | 中科鼎实环境工程有限公司 | Circulating well system for treating VOCs and DNAPLs in polluted underground water |
-
2021
- 2021-10-12 CN CN202111186245.4A patent/CN113800657B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113800657A (en) | 2021-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11033941B2 (en) | Soil-groundwater joint remediation device and method | |
| US6254310B1 (en) | In-well air stripping and adsorption | |
| KR101927947B1 (en) | In Situ Treatment Apparatus applying Pneumatic Fracturing and Forced Extraction for oil contaminated Soil | |
| CN105149335B (en) | The in situ chemical oxidation repairing construction engineering method of organic polluted soil | |
| CN109332369B (en) | System and process for repairing petroleum hydrocarbon polluted soil and underground water | |
| CN211664865U (en) | Groundwater circulation well normal position prosthetic devices | |
| CN103736722A (en) | In-situ polluted soil leaching system and method | |
| CN111360052A (en) | Multi-layer circulating well system for soil and underground water remediation | |
| CN105731628A (en) | In-situ chemical oxidation repair system and method for underground water polluted by hydrochloric ether | |
| CN203853374U (en) | In-situ polluted soil leaching system | |
| CN208883659U (en) | A kind of combined soil ground water circulation processing unit | |
| US20110293492A1 (en) | In situ process and method for ground water remediation and recovery of minerals and hydrocarbons | |
| WO1996000624A1 (en) | A method of decontaminating soils and/or residues in situ and ex situ combining horizontal radial flow technique and depolluting agents | |
| CN110482737A (en) | For the circulation well repair system of Organic Contamination of Groundwater object | |
| KR20030087915A (en) | Method for purifying a layer of contaminated soil and apparatus | |
| CN110104755A (en) | A kind of hydrodynamic force regulator control system for the diffusion of accelerating ground water in-situ immobilization medicament | |
| CN112142160A (en) | AS/MPE combined repairing system and method for underground water polluted by LNAPL | |
| CN211866169U (en) | In-situ leaching and chemical oxidation combined remediation system for contaminated soil | |
| CN113800657B (en) | In-situ treatment method and treatment device for underground water DNAPLS | |
| CN104709957B (en) | The device and method of extracting and separating Organic Chemicals In Groundwater and tensio-active agent | |
| CN212121196U (en) | Multi-layer circulating well system for soil and underground water remediation | |
| KR20100067161A (en) | In-situ remediation of fe and mn in groundwater using oxygen zone | |
| CN114751472A (en) | Underground water circulating well device for in-situ remediation of contaminated site and remediation method | |
| KR101275378B1 (en) | Hybrid type soil washing method using in-situ complexly contaminated soil agitation | |
| JP2006130419A (en) | Contaminated stratum cleaning system and contaminated stratum cleaning method using it |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |