CN113830936A - Vertical interception and neutralization treatment structure and method for leachate leakage of acid solid waste landfill - Google Patents
Vertical interception and neutralization treatment structure and method for leachate leakage of acid solid waste landfill Download PDFInfo
- Publication number
- CN113830936A CN113830936A CN202111298650.5A CN202111298650A CN113830936A CN 113830936 A CN113830936 A CN 113830936A CN 202111298650 A CN202111298650 A CN 202111298650A CN 113830936 A CN113830936 A CN 113830936A
- Authority
- CN
- China
- Prior art keywords
- neutralization
- monitoring
- underground water
- curtain
- wells
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a vertical interception and neutralization treatment structure and a method for leachate leakage of an acidic solid waste landfill, wherein the structure comprises a solid waste landfill and a leakage area in the solid waste landfill, a vertical seepage-proof curtain is arranged in the downstream direction of lateral leakage of the leakage area, and a plurality of first in-curtain monitoring and pumping wells are arranged between the vertical seepage-proof curtain and the leakage area; and a plurality of second rows of monitoring and feeding wells are sequentially arranged in the downstream direction of the vertical impervious curtain, a neutralization material diffusion area, an acid underground water neutralization area and an alkaline underground water neutralization area are respectively arranged at the downstream side of the second rows of monitoring and feeding wells, and a third row of monitoring wells are arranged in the downstream direction of the neutralization material diffusion area, the acid underground water neutralization area and the alkaline underground water neutralization area. The acid solid waste landfill leachate is intercepted and neutralized by the method, so that pollution is controlled, and the quality of underground water reaches the standard.
Description
Technical Field
The invention belongs to the fields of underground engineering technology, geology and landfill, and particularly relates to a vertical interception and neutralization treatment structure and method for leachate leakage of an acidic solid waste landfill.
Background
With the high importance of the national level on the ecological environment protection, a series of regulations and regulations for ecological environment protection are continuously provided, wherein strict requirements are imposed on the construction and operation of solid waste landfill sites. For the general industrial solid wastes of the II type, the landfill site is generally processed by horizontal paving and seepage-proofing treatment, and the leachate is extracted and then processed in a centralized way. Due to problems of horizontal paving construction processes and techniques, local leakage of solid waste landfill sites during operation often results, causing leachate to pollute the surrounding environment.
At present, to the filtration liquid that the seepage came out, because prevention of seepage membrane seepage area is difficult to the accurate positioning, is difficult to realize restoreing the fixed point of horizontal bedding, and filtration liquid gets into underground rock-soil body after, along with groundwater flow direction seepage and diffusion, the degree of depth is big, and the distribution is wide, and the difficult conventional extraction mode that adopts is handled. Aiming at leakage, an impervious curtain or an impervious wall can be arranged in the downstream direction of a leakage area for interception, the impervious wall is high in cost and limited in depth, is difficult to implement in bedrock areas, and the impervious curtain cannot meet 10 of the standard requirement-7The permeability coefficient of cm/s requires that a small amount of percolate which permeates out needs to be further treated, pollution is controlled, and the percolate reaches the standard and is discharged.
Disclosure of Invention
The invention aims to systematically solve the in-situ interception and neutralization treatment of leachate leakage in an acidic general industrial solid waste landfill, ensure that the acidic leachate does not continuously diffuse through an interception and neutralization treatment structure and method, and avoid the problem of new underground water pollution caused by adding a treatment reagent.
The invention is realized by the following steps:
a vertical intercepting and neutralizing treatment structure for leachate leakage of an acidic solid waste landfill comprises a solid waste landfill and a leakage area in the solid waste landfill, wherein a vertical seepage-proof curtain is arranged in the downstream direction of lateral leakage of the leakage area, and a plurality of first drainage-in-monitoring and pumping wells are arranged between the vertical seepage-proof curtain and the leakage area; and a plurality of second rows of monitoring and feeding wells are sequentially arranged in the downstream direction of the vertical impervious curtain, a neutralization material diffusion area, an acid underground water neutralization area and an alkaline underground water neutralization area are respectively arranged at the downstream side of the second rows of monitoring and feeding wells, and a third row of monitoring wells are arranged in the downstream direction of the neutralization material diffusion area, the acid underground water neutralization area and the alkaline underground water neutralization area.
And adding a neutralizing material into a second row of monitoring and feeding wells for monitoring the over-standard underground water to form a neutralizing well. The neutralization material is placed in the material bag, the material bag is fixed on the wellhead fixing piece through the traction rope, and the wellhead fixing piece is fixed on the corresponding wellhead of the second row monitoring and feeding well in a pre-buried mode. The neutralization material is quicklime.
The vertical interception and neutralization treatment method for the leachate leakage of the acidic solid waste landfill adopting the structure comprises the following steps:
1) finding out the groundwater seepage direction and the lateral seepage range AB of the leachate seepage of the general acidic industrial solid waste landfill, finding out the influence depth CD of polluted groundwater, and arranging a vertical anti-seepage curtain for interception;
2) arranging first row-curtain internal monitoring and pumping wells at two ends of the upstream of the vertical impervious curtain, monitoring the underground water level and the water quality of the end head of the curtain in the curtain, and stopping up the underground water polluted by the percolate at the end head in the curtain;
3) arranging a second row of monitoring and feeding wells at a certain distance at the downstream of the vertical impervious curtain in the groundwater seepage direction;
4) after the second row of monitoring and feeding wells monitor over-standard underground water, the abnormal monitoring well and the adjacent monitoring well are changed into a neutralization well, a neutralization bag is put into the well, the neutralization material in the bag is quicklime, and the quicklime reacts with the underground water to generate Ca (OH)2Dissolved in underground water and diffused downstream along the underground water to form a neutralized material diffusion area, and the diffusion halo of each hole is in a certain distance shape at the downstreamAn acidic groundwater neutralizing area formed by an alkaline groundwater water curtain; OH-in the water curtain of the alkaline groundwater and H + in the acidic polluted water are subjected to neutralization reaction, and the generated carbonate substances are precipitated in the cracks of the neutralization curtain to weaken the permeability of rock mass;
5) excess Ca (OH)2HCO widely existing with groundwater downstream of alkaline groundwater neutralization zone3Reaction to CaCO3The sediment is precipitated in the crack pores of the neutralization area of the alkaline underground water, and the permeability of rock and soil mass is weakened; the groundwater flow passing through the alkaline neutralization area is the groundwater up to the standard;
6) a third row of monitoring wells are arranged at the downstream, and the neutralization material consumption of the second row of monitoring and feeding wells is adjusted or a new feeding well is supplemented according to the pH value condition of water quality
Compared with the prior art, the acid solid waste landfill leachate is intercepted and neutralized by the method, so that pollution is controlled, and the quality of underground water reaches the standard. Firstly, intercepting a main leakage channel by using an anti-seepage curtain, monitoring the high sewage congestion at the upstream of the curtain, and performing pumping treatment if necessary. And (3) monitoring underground water through a monitoring well at the downstream of the curtain, changing the monitoring well into a neutralizing well if acid pollution exists, adding an alkaline material to perform a neutralization reaction with the acid underground water, continuously monitoring at the downstream, and monitoring and adjusting the using amount of the neutralizing material to realize self-purification of redundant neutralizing material, wherein sediment substances generated by the neutralization and self-purification are filled in cracks and pores of the rock-soil body, so that the permeability of the rock-soil body is further weakened. By three-layer monitoring of upstream and downstream pumping drainage, interception and neutralization and three-layer control three-dimensional protection, the leakage of the acidic solid waste landfill can be controlled, and the groundwater environment around the landfill is ensured not to be polluted.
Drawings
FIG. 1 is a vertical interception and neutralization treatment structure (plan view) for leachate leakage in an acidic solid waste landfill according to the present invention;
FIG. 2 is a vertical interception and neutralization treatment structure (cross-sectional view) of leachate leakage from the acid solid waste landfill of the present invention;
FIG. 3 is a schematic view of a charge well structure;
fig. 4 is a process flow diagram.
Description of reference numerals: 1-solid waste landfill, 2-leakage area, 3-lateral leakage, 4-first row of in-screen monitoring and pumping drainage wells, 5-vertical seepage-proof curtain, 6-a little amount of leakage liquid, 7-second row of monitoring and feeding wells, 8-neutralization diffusion area, 9-acid underground water neutralization area, 10-alkaline underground water neutralization area, 11-standard underground water, 12-third row of monitoring wells, 13-feeding traction rope, 14-neutralization material, 15-material bag and 16-fixing piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2, the present invention is implemented as follows:
firstly, finding out the groundwater seepage direction and the lateral seepage range AB of the seepage of the percolate of the general acidic industrial solid waste landfill 1, finding out the influence depth CD of polluted groundwater, arranging a vertical seepage-proof curtain 5 for interception, wherein the water permeability of the vertical seepage-proof curtain 5 is less than 1Lu, and adopting acid-resistant pulp (test results of acid-resistant pulp and the like) to enable the vertical seepage-proof curtain 5 to intercept the main seepage of the percolate.
And arranging first drainage and monitoring wells 4 at two ends of the upper stream of the vertical impervious curtain 5, monitoring the underground water level and water quality of curtain ends in the curtain, and changing the detection well into a drainage well to perform centralized treatment on the drainage sewage when the underground water polluted by the percolate at the curtain ends in the curtain is high and lateral seepage bypassing the curtain ends is possibly generated.
And then a second row of monitoring and feeding wells 7 are arranged at a certain distance at the downstream of the impervious curtain in the groundwater seepage direction.
And after the second row of monitoring and feeding wells 7 monitor the underground water 6 which exceeds the standard, the abnormal monitoring wells and the adjacent monitoring wells are changed into neutralizing wells. The structure of the neutralizing well is shown in figure 3, a neutralizing material bag 15 is put into the well, and the material bag 15 has better performanceThe material bag 15 is fixed on a wellhead fixing piece 16 through a traction rope 13, so that the material bag can be conveniently detached and fed, and the neutralization material 14 in the material bag is quicklime (CaO). The quicklime reacts with the groundwater to form Ca (OH)2And dissolved in underground water and diffused downstream along the underground water flow, and the diffusion corona of each hole forms an acidic underground water neutralization zone 9 which is also an acid-base neutralization reaction zone at a certain distance downstream.
OH & lt- & gt in the acidic ground water neutralization zone 9 and H & lt + & gt in the acidic polluted water are subjected to neutralization reaction in the acid-base neutralization reaction zone, and generated carbonate substances are precipitated in the cracks of the neutralization curtain to weaken the permeability of rock mass.
Ca2++2OH－+2H++2X－＝CaX2↓+2H2O
Then, excess Ca (OH)2HCO widely existing with groundwater downstream of alkaline groundwater neutralization zone3Reaction to CaCO3And precipitates in the pores of the 10 cracks in the alkaline underground water neutralization area and weakens the permeability of rock and soil mass. The groundwater flow through the alkaline groundwater neutralization zone 10 is the up-to-standard groundwater 11.
Ca2++OH－+HCO3－＝CaCO3↓+H2O
And finally, arranging a third row of monitoring wells 12 at the downstream, and adjusting the amount of the neutralizing materials in the second row of monitoring and feeding wells 7 or supplementing a new feeding well according to the pH value condition of water quality.
A flow chart of the method of the present invention is shown in fig. 4.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a vertical interception neutralization treatment structure of acid solid waste landfill leachate seepage which characterized in that: the solid waste landfill site comprises a solid waste landfill site (1) and a leakage area (2) in the solid waste landfill site (1), wherein a vertical impervious curtain (5) is arranged in the downstream direction of a lateral leakage (3) of the leakage area (2), and a plurality of first row-curtain inner monitoring and pumping wells (4) are arranged between the vertical impervious curtain (5) and the leakage area (2); a plurality of second rows of monitoring and feeding wells (7) are sequentially arranged in the downstream direction of the vertical impervious curtain (5), a neutralization material diffusion area (8), an acidic underground water neutralization area (9) and an alkaline underground water neutralization area (10) are respectively arranged on the downstream side of the second rows of monitoring and feeding wells (7), and a third row of monitoring wells (12) are arranged in the downstream direction of the neutralization material diffusion area (8), the acidic underground water neutralization area (9) and the alkaline underground water neutralization area (10).
2. The vertical intercepting and neutralizing treatment structure for leachate leakage of acidic solid waste landfill according to claim 1, wherein: and (3) adding a neutralization material (14) into a second row of monitoring and feeding wells (7) for monitoring the underground water (6) exceeding the standard to form a neutralization well.
3. The vertical intercepting and neutralizing treatment structure for leachate leakage of acidic solid waste landfill according to claim 2, wherein: the neutralization material (14) is placed in the material bag (15), the material bag (15) is fixed on a wellhead fixing piece (16) through a traction rope (13), and the wellhead fixing piece (16) is fixed on a wellhead of the corresponding second row monitoring and feeding well (7) in a pre-buried mode.
4. The vertical intercepting and neutralizing treatment structure for leachate leakage of acidic solid waste landfill according to claim 2, wherein: the neutralization material (14) comprises quicklime.
5. A vertical interception and neutralization treatment method for leachate leakage of acidic solid waste landfill adopting the structure of any one of claims 1 to 4 is characterized by comprising the following steps:
1) finding out the seepage direction and the lateral seepage range AB of the underground water of the seepage of the percolate of the general acidic industrial solid waste landfill site (1), finding out the influence depth CD of polluted underground water, and arranging a vertical seepage-proof curtain (5) for interception;
2) arranging first row-of-curtain internal monitoring and pumping wells (4) at two ends of the upstream of the vertical impervious curtain (5), monitoring the underground water level and water quality of the end heads of the curtain in the curtain, and stopping up the underground water polluted by the percolate at the end heads in the curtain;
3) a second row of monitoring and feeding wells (7) are arranged at a certain distance at the downstream of the vertical impervious curtain (5) in the groundwater seepage direction;
4) after the second row of monitoring and feeding wells (7) monitor over-standard underground water (6), the abnormal monitoring wells and the adjacent monitoring wells are changed into neutralizing wells, neutralizing bags (15) are fed into the wells, neutralizing materials (14) in the neutralizing bags are quicklime, and the quicklime reacts with the underground water to generate Ca (OH)2And dissolved in underground water, and diffused downstream along the underground water flow to form a neutralization material diffusion area (8), and the diffusion corona of each hole forms an acidic underground water neutralization area (9) formed by an alkaline underground water curtain at a certain distance downstream; OH-in the water curtain of the alkaline groundwater and H + in the acidic polluted water are subjected to neutralization reaction, and the generated carbonate substances are precipitated in the cracks of the neutralization curtain to weaken the permeability of rock mass;
5) excess Ca (OH)2HCO existing widely with groundwater downstream of the alkaline groundwater neutralization zone (10)3Reaction to CaCO3Precipitates in the crack pores of the alkaline underground water neutralization area (10) and weakens the permeability of rock and soil mass; the groundwater flow passing through the alkaline neutralization zone is up to standard groundwater (11);
6) a third row of monitoring wells (12) are arranged at the downstream, and the neutralization material consumption of the second row of monitoring and feeding wells (7) is adjusted or a new feeding well is supplemented according to the pH value condition of water quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111298650.5A CN113830936A (en) | 2021-11-04 | 2021-11-04 | Vertical interception and neutralization treatment structure and method for leachate leakage of acid solid waste landfill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111298650.5A CN113830936A (en) | 2021-11-04 | 2021-11-04 | Vertical interception and neutralization treatment structure and method for leachate leakage of acid solid waste landfill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113830936A true CN113830936A (en) | 2021-12-24 |
Family
ID=78967035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111298650.5A Withdrawn CN113830936A (en) | 2021-11-04 | 2021-11-04 | Vertical interception and neutralization treatment structure and method for leachate leakage of acid solid waste landfill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113830936A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116377959A (en) * | 2023-06-05 | 2023-07-04 | 生态环境部南京环境科学研究所 | System and method for treating sandy soil landfill solid waste polluted river |
-
2021
- 2021-11-04 CN CN202111298650.5A patent/CN113830936A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116377959A (en) * | 2023-06-05 | 2023-07-04 | 生态环境部南京环境科学研究所 | System and method for treating sandy soil landfill solid waste polluted river |
| CN116377959B (en) * | 2023-06-05 | 2023-08-15 | 生态环境部南京环境科学研究所 | System and method for treating sandy soil landfill solid waste polluted river |
| US11959238B1 (en) | 2023-06-05 | 2024-04-16 | Nanjing Institute Of Environmental Sciences, Mee | Treatment system and method for sandy soil landfill solid waste polluted river channel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104358267B (en) | Vacuum tube well precipitation and disposal method for rapidly restoring in-situ water and soil in polluted place | |
| CN107720853A (en) | DNAPL pollution amelioration system and method in underground water based on pollution resistance control | |
| CN204999675U (en) | Soil groundwater normal position is poured into into and is extracted joint prosthetic devices with circulation | |
| CN106915796B (en) | Method for conducting PRB in-situ restoration system construction on underground aquifer | |
| AU2015263742B2 (en) | Device for strengthening water purification of first-level recession water for dry cropland | |
| CN104452656B (en) | A kind of river course segmentation Dredging Construction method | |
| CN107159698B (en) | Method for in-situ remediation of heavy metal contaminated soil by three-dimensional well leaching combined stabilization | |
| CN106734178A (en) | Comprehensive restoration system and method for polluted site | |
| CN113830936A (en) | Vertical interception and neutralization treatment structure and method for leachate leakage of acid solid waste landfill | |
| CN113444882A (en) | Ion adsorption type rare earth ore in-situ leaching field leakage mother liquor recovery system and treatment method | |
| CN113863345A (en) | Underground water pollution-removing and shunting treatment structure and method for harmful substance storage field | |
| CN202688016U (en) | In-situ repair device for underground water | |
| CN110255638A (en) | A kind of polluted underground water containing nonaqueous phase liquid original position pump-and-treat system system and method | |
| CN103523889B (en) | PRB joint control-based hydraulic power capturing method for removing contaminants in underground water | |
| CN113235710A (en) | Efficient underground water remediation system and method | |
| CN210595310U (en) | Contain non-aqueous phase liquid pollution groundwater normal position and take out processing system | |
| CN207959131U (en) | A kind of gallery arrangement of RCC dam | |
| CN205530585U (en) | Tailing storehouse underground drainage structures | |
| CN1804234B (en) | Drainage method and apparatus for red mud dump in karst terrain | |
| CN103964629A (en) | Acid mine drainage OLWS method | |
| CN114439047A (en) | Method for controlling, guiding and preventing seepage of pollution of tailing pond | |
| CN115125404A (en) | System and method for collecting ion type rare earth ore in-situ leaching field leakage liquid | |
| JP6484139B2 (en) | Pollution diffusion prevention system and pollution diffusion prevention method | |
| CN204225136U (en) | For the wire distribution well-points dewatering structure of contaminated water and soil integration in-situ immobilization | |
| CN209338160U (en) | A kind of interior circulation well system being aerated of well |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20211224 |
|
| WW01 | Invention patent application withdrawn after publication |