CN108396784B - Refuse landfill liquid discharge treatment device - Google Patents
Refuse landfill liquid discharge treatment device Download PDFInfo
- Publication number
- CN108396784B CN108396784B CN201810463672.4A CN201810463672A CN108396784B CN 108396784 B CN108396784 B CN 108396784B CN 201810463672 A CN201810463672 A CN 201810463672A CN 108396784 B CN108396784 B CN 108396784B
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- liquid collecting
- collecting pipe
- liquid
- layer
- water guide
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- 239000007788 liquid Substances 0.000 title claims abstract description 114
- 208000028659 discharge Diseases 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000010410 layer Substances 0.000 claims abstract description 57
- 238000001914 filtration Methods 0.000 claims abstract description 28
- 239000002344 surface layer Substances 0.000 claims abstract description 14
- 238000007654 immersion Methods 0.000 claims abstract description 13
- 239000004746 geotextile Substances 0.000 claims abstract description 6
- 238000009941 weaving Methods 0.000 claims abstract description 4
- 239000004927 clay Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 239000011229 interlayer Substances 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 239000011456 concrete brick Substances 0.000 claims description 2
- 229910052900 illite Inorganic materials 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052622 kaolinite Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000010902 straw Substances 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 8
- 238000007599 discharging Methods 0.000 description 14
- 239000010813 municipal solid waste Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 239000002893 slag Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/006—Sealing of existing landfills, e.g. using mining techniques
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Revetment (AREA)
Abstract
The invention discloses a refuse landfill liquid discharge treatment device in the refuse landfill field, which comprises an anti-seepage structure and a liquid discharge structure, wherein the anti-seepage structure comprises an anti-seepage layer and a filtration layer, the filtration layer comprises a bottom layer and a surface layer, a water guide net is arranged between the bottom layer and the surface layer, and the water guide net is formed by weaving a water guide rope made of non-woven geotextile in a twisting mode; the liquid draining structure comprises a liquid collecting pipe which is vertically installed, a plurality of liquid collecting holes are formed in the side wall of the liquid collecting pipe, four slots are uniformly distributed in the side wall of the bottom end of the liquid collecting pipe along the circumferential direction, the liquid collecting pipe is inserted into a node of a water guide net and is embedded into the slots, a sliding rail is arranged on the inner wall of the liquid collecting pipe, a floating frame is arranged in the liquid collecting pipe, a water immersion pump is fixed on the floating frame and is connected with the liquid collecting pipe, and the bottom end of the liquid collecting pipe is propped against the bottom layer. The invention can solve the problem that the leachate generated after the refuse landfill pollutes the soil.
Description
Technical Field
The invention relates to the field of landfill, in particular to a liquid discharge treatment device for a landfill site.
Background
At present, landfill is the most main method for solving the problem of the way out of the household garbage in most cities in China, and a large amount of leachate exists in the garbage during the landfill treatment process of the household garbage, and the leachate can pollute soil, underground water and surface water, so that a landfill seepage prevention system becomes an important component of the existing solid waste landfill. The landfill seepage prevention system can isolate the inside and the outside of a landfill area, prevent leachate in garbage from polluting ground water and surface water, and prevent off-site water from entering the landfill area. The drainage system with leachate is often communicated in the landfill area, so that leachate in the garbage is discharged through the drainage system with leachate, and then the leachate is treated by the leachate treatment process, so that the harm of the garbage to the environment is reduced.
Disclosure of Invention
The invention aims to provide a liquid discharge treatment device for a landfill, so as to solve the problem that leachate generated after landfill pollutes soil.
In order to achieve the above purpose, the basic technical scheme of the invention is as follows: the refuse landfill liquid discharge treatment device comprises an anti-seepage structure and a liquid discharge structure, wherein the anti-seepage structure comprises an anti-seepage layer and a filtration layer, the filtration layer comprises a bottom layer and a surface layer, a water guide net is arranged between the bottom layer and the surface layer, and the water guide net is formed by weaving a water guide rope formed by twisting non-woven geotextile; the liquid draining structure comprises a liquid collecting pipe which is vertically installed, a plurality of liquid collecting holes are formed in the side wall of the liquid collecting pipe, four slots are uniformly distributed in the side wall of the bottom end of the liquid collecting pipe along the circumferential direction, the liquid collecting pipe is inserted into a node of a water guide net and is embedded into the slots, a sliding rail is arranged on the inner wall of the liquid collecting pipe, a floating frame is arranged in the liquid collecting pipe, a water immersion pump is fixed on the floating frame and is connected with the liquid collecting pipe, and the bottom end of the liquid collecting pipe is propped against the bottom layer.
The principle of the scheme is as follows: in practical application, the seepage-proofing structure is used for preventing the seepage of leachate and rainwater into underground polluted soil or underground water, and the liquid draining structure is used for directionally draining leachate and harmful gas generated by landfill waste. The seepage-proofing layer is used as a main seepage-proofing structure for preventing seepage of leachate into soil, and is used for primarily filtering and blocking the leachate, and absorbing and guiding the leachate. The bottom layer is used as an anti-seepage structure at the bottom of the filtration layer and a bearing structure of filler in the filtration layer, and the surface layer is used as a boundary between the filtration layer and landfill waste. The water guide net is used for enhancing the extensibility of the filtration layer, absorbing and guiding the leachate in the filtration layer, guiding the leachate into the liquid collecting pipe, and guiding the leachate along the water guide net by the water guide rope. The liquid collecting pipe is used for collecting leachate seeping from landfill waste and used as a guide supporting structure of the floating frame, a liquid draining and exhausting space is provided, the liquid collecting pipe is positioned by matching the slot with the water guide rope, a channel for the leachate in the leachate filtering layer to enter the liquid collecting pipe is provided, the sliding rail is used for guiding the floating frame, and the water soaking pump and the liquid draining pipe are used for draining the leachate in the liquid collecting pipe.
The advantage of this scheme is: 1. by arranging the filtration layer and the water guide net, the liquid collecting pipe can be used for collecting and discharging the leachate before the leachate contacts the impermeable layer, so that the leachate can be effectively discharged in time, and the problem that the leachate generated after the existing landfill pollutes soil is solved; 2. the vertical liquid draining structure is adopted, so that the liquid draining structure is not subjected to vertical extrusion and shearing of landfill waste, and non-woven geotextile is adopted for transverse drainage of leachate, so that the leachate layer has good ductility, and the problem that a leachate drainage system is damaged and leachate cannot be drained well due to foundation settlement caused by landfill waste can be effectively avoided; 3. the floating drainage mechanism can be automatically adjusted according to the height of the percolate in the liquid collecting pipe, so that the water immersion pump can effectively drain the percolate; 4. the non-woven geotextile is adopted to twist into the water guide rope, the materials are convenient, the water absorption and water guide performance is good, the leachate can be effectively drawn in the filtration layer, the leachate is accumulated near the water guide net, the leachate accumulated near the water guide net can be drawn into the liquid collecting pipe through the action of the liquid discharging mechanism at the node of the water guide net, the good accumulation effect is achieved on the leachate, and the drainage of the leachate is facilitated.
According to the first preferred scheme, as an improvement of the basic scheme, the surface layer is mesh cloth, the bottom layer is a geomembrane, slag is filled in the filtration layer, a support plate is clamped on the water guide rope, and the support plate is connected to the surface layer. As the filtering layer with certain supporting strength can be formed by filling slag, the position of the water guide rope in the filtering layer can be fixed by the support plate, the water guide rope is kept in the middle of the filtering layer, and the phenomenon that the water guide rope absorbs and guides leachate is prevented from being influenced by extrusion of the filtering layer in the garbage filling process.
The second preferred mode is an improvement of the first preferred mode, the floating frame comprises a bottom plate and a panel, a supporting rod is connected between the bottom plate and the panel, the water immersion pump is fixed between the bottom plate and the panel, the panel is provided with a hollow interlayer, polyethylene foam is filled in the interlayer, through holes are formed in the panel, the liquid discharge pipes are inserted in the through holes, and sliding grooves matched with the sliding rails are formed in the panel and the bottom plate. Preferably, the floating frame floats on the surface of the leachate in the liquid collecting pipe by buoyancy of the leachate on the panel, the bottom plate provides support for the water immersion pump, and the sliding groove is matched with the sliding rail to guide the floating frame so as to prevent the liquid discharging pipe from twisting.
In a third preferred aspect, as an improvement of the second preferred aspect, the panel and the bottom plate are both provided with a plurality of water permeable holes. This is arranged so that leachate which seeps from the header above the floating frame can flow to below the floating frame.
The fourth preferred embodiment is an improvement of the third preferred embodiment, the top end of the liquid collecting tube is fixed with a sealing cover, an exhaust port and a liquid outlet are fixed on the sealing cover, the top end of the liquid outlet tube is communicated with the liquid outlet, the liquid outlet tube is a corrugated telescopic tube, and the exhaust port is connected with an exhaust pipe. The corrugated telescopic pipe is used as the liquid drain pipe, and the liquid drain pipe can automatically shrink and stretch in the process that the floating frame floats up and down in the liquid collecting pipe, so that the phenomenon that the liquid drain pipe is twisted and knotted in the liquid collecting pipe to influence the drainage of leachate is avoided.
In a fifth preferred aspect, as an improvement of the fourth preferred aspect, the outer wall of the liquid discharge tube is recessed inward to form a clamping groove, and the clamping groove is clamped on the sliding rail and can slide along the sliding rail. The liquid discharge pipe can be further guided and limited in shrinkage and elongation through connection of the clamping groove and the sliding rail, and the liquid discharge pipe can be effectively prevented from being twisted or knotted in the liquid collecting pipe.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the liquid collecting pipe 1, the panel 2, the supporting rod 3, the bottom plate 4, the surface layer 5, the filtration layer 6, the impermeable layer 7, the bottom layer 8, the supporting plate 9, the water guide rope 10, the water permeable hole 11, the water immersion pump 12, the sliding rail 13, the liquid discharging pipe 14, the liquid discharging port 15, the exhaust pipe 16, the sealing cover 17 and the liquid collecting hole 18.
An example is substantially as shown in figure 1: the refuse landfill liquid discharge treatment device comprises an impermeable structure and a liquid discharge structure, wherein the impermeable structure comprises an impermeable layer 7 and a filtration layer 6, the filtration layer 6 comprises a bottom layer 8 and a surface layer 5, the surface layer 5 is a mesh fabric, the bottom layer 8 is a geomembrane, slag is filled in the filtration layer 6, a water guide net is arranged between the bottom layer 8 and the surface layer 5, the water guide net is formed by weaving a water guide rope 10 which is formed by twisting nonwoven geotextile, a support plate 9 is clamped on the water guide rope 10, and the support plate 9 is connected to the surface layer 5. The liquid draining structure comprises a liquid collecting pipe 1 which is vertically arranged, and the bottom end of the liquid collecting pipe 1 is propped against a bottom layer 8. The side wall of the liquid collecting pipe 1 is provided with a plurality of liquid collecting holes 18, four vertical slots are uniformly distributed on the side wall of the bottom end of the liquid collecting pipe 1 along the circumferential direction, and the liquid collecting pipe 1 is inserted at the node of the water guide net and the water guide rope 10 is embedded into the slots. The inner wall of the liquid collecting pipe 1 is provided with a sliding rail 13, a floating frame is arranged in the liquid collecting pipe 1, a water immersion pump 12 is fixed on the floating frame, the water immersion pump 12 is connected with a liquid discharging pipe 14, the outer wall of the liquid discharging pipe 14 is inwards sunken to form a clamping groove, and the clamping groove is clamped on the sliding rail 13 and can slide along the sliding rail 13.
The floating frame comprises a bottom plate 4 and a panel 2, a plurality of water permeable holes 11 are formed in the panel 2 and the bottom plate 4, a supporting rod 3 is connected between the bottom plate 4 and the panel 2, a water immersion pump 12 is fixed between the bottom plate 4 and the panel 2, the panel 2 is provided with a hollow interlayer, polyethylene foam is filled in the interlayer, through holes are formed in the panel 2, a liquid discharge pipe 14 is inserted in the through holes, and sliding grooves matched with sliding rails 13 are formed in the panel 2 and the bottom plate 4.
The top of the liquid collecting pipe 1 is fixed with a sealing cover 17, the sealing cover 17 is fixed with an exhaust port and a liquid outlet 15, the top of the liquid discharging pipe 14 is communicated with the liquid outlet 15, the liquid discharging pipe 14 is a corrugated telescopic pipe, and the exhaust port is connected with an exhaust pipe 16.
The impermeable layer 7 is formed by sequentially paving broken stone, bentonite, aerated concrete bricks and mixed clay from bottom to top, wherein the mixed clay comprises kaolinite clay, illite clay, water-absorbent resin and straw according to the mass ratio of 2:1.4: mixing at a ratio of 0.2:1.
The specific implementation process is as follows: the impervious layer 7 is used for preventing the infiltration of leachate into soil to pollute soil or underground water, and in the landfill process, the landfill garbage is piled up on the filtration layer, and slag protects the water guide net from being broken by sharp objects in the garbage. The leachate generated in the long-time stacking process of the garbage permeates downwards to the filtration layer, and the rainwater falling from the rain is mixed with the leachate after passing through the landfill garbage to permeate to the filtration layer, so that the leachate is primarily blocked by the geomembrane bottom layer 8 on the filtration layer. The leachate is accumulated in the leachate layer and enters the liquid collecting pipe 1 from the slot through the guide of the water guide net and the water guide rope 10, the leachate and gas generated in the garbage pile enter the liquid collecting pipe 1 through the liquid collecting hole 18, the leachate is discharged through the liquid discharging pipe 14 and the liquid discharging hole 15 on the sealing cover 17 by the water immersion pump 12 in the liquid collecting pipe 1, and the gas in the liquid collecting pipe 1 is discharged through the gas outlet and the gas discharging pipe 16. When raining leads to the leachate to increase in the short time, the leachate in entering the liquid collecting pipe 1 increases, the height of the leachate in the liquid collecting pipe 1 increases, the floating frame floats on the surface of the leachate along the sliding rail 13 under the buoyancy action of the leachate to the panel 2, so that the water immersion pump 12 is always positioned in the leachate and can continuously and stably pump away the leachate and reduce the contact with air to reduce the oxidation corrosion degree, and the corrugation on the liquid discharging pipe 14 is folded or unfolded under the guidance of the clamping groove and the sliding rail 13, so that the liquid discharging pipe 14 can automatically perform the unfolding length adjustment according to the vertical position of the floating frame.
Claims (5)
1. Landfill waste liquid processing apparatus, its characterized in that: the anti-seepage structure comprises an anti-seepage layer and a filtration layer, wherein the filtration layer comprises a bottom layer and a surface layer, a water guide net is arranged between the bottom layer and the surface layer, and the water guide net is formed by weaving water guide ropes twisted by non-woven geotextile; the liquid draining structure comprises a liquid collecting pipe which is vertically arranged, a plurality of liquid collecting holes are formed in the side wall of the liquid collecting pipe, four slots are uniformly distributed on the side wall of the bottom end of the liquid collecting pipe along the circumferential direction, the liquid collecting pipe is inserted into a node of a water guide net and the water guide rope is embedded into the slots, a sliding rail is arranged on the inner wall of the liquid collecting pipe, a floating frame is arranged in the liquid collecting pipe, a water immersion pump is fixed on the floating frame and connected with the liquid collecting pipe, the bottom end of the liquid collecting pipe is propped against a bottom layer, the floating frame comprises a bottom plate and a panel, a supporting rod is connected between the bottom plate and the panel, the water immersion pump is fixed between the bottom plate and the panel, a hollow interlayer is arranged on the panel, polyethylene foam is filled in the interlayer, through holes are formed in the panel, and sliding grooves matched with the sliding rail are formed in the panel and the bottom plate; the impermeable layer is composed of gravels, bentonite, aerated concrete bricks and mixed clay which are paved in sequence from bottom to top, wherein the mixed clay is composed of kaolinite clay, illite clay, water-absorbent resin and straw according to the mass ratio of 2:1.4: mixing at a ratio of 0.2:1.
2. The landfill liquid discharge treatment device according to claim 1, wherein: the surface course is the screen cloth, and the bottom is the geomembrane, it has the slay to strain the intussuseption of seepage layer, the joint has the extension board on the water guide cable, and the extension board is connected on the surface course.
3. The landfill liquid discharge treatment device according to claim 2, wherein: and a plurality of water permeable holes are formed in the panel and the bottom plate.
4. A landfill liquid discharge treatment apparatus according to claim 3, wherein: the top of the liquid collecting pipe is fixedly provided with a sealing cover, the sealing cover is fixedly provided with an air outlet and a liquid outlet, the top of the liquid outlet pipe is communicated with the liquid outlet, the liquid outlet pipe is a corrugated telescopic pipe, and the air outlet is connected with an exhaust pipe.
5. The landfill liquid discharge treatment device according to claim 4, wherein: the outer wall of the liquid discharge pipe is inwards sunken to form a clamping groove which is clamped on the sliding rail and can slide along the sliding rail.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201810463672.4A CN108396784B (en) | 2018-05-15 | 2018-05-15 | Refuse landfill liquid discharge treatment device |
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CN201810463672.4A CN108396784B (en) | 2018-05-15 | 2018-05-15 | Refuse landfill liquid discharge treatment device |
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CN108396784A CN108396784A (en) | 2018-08-14 |
CN108396784B true CN108396784B (en) | 2023-10-31 |
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CN109677054B (en) * | 2019-01-16 | 2020-11-24 | 中国电建集团山东电力建设有限公司 | Anti-corrosion isolation plate for garbage power generation foundation pit and preparation method thereof |
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CN208280186U (en) * | 2018-05-15 | 2018-12-25 | 贵州杉海沿环保科技有限责任公司 | Refuse landfill drain processing unit |
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2018
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CN201010984Y (en) * | 2006-12-20 | 2008-01-23 | 中国矿业大学 | Integrated pumping device for biogas and leachate in refuse landfill |
KR20100012273A (en) * | 2008-07-28 | 2010-02-08 | 주식회사 건화 | Leachate draining structure of landfill which uses the waste tire chip |
CN101736804A (en) * | 2009-12-22 | 2010-06-16 | 浙江大学 | Refuse landfill percolate pump drainage minor-caliber shaft structure and silt prevention method |
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CN208280186U (en) * | 2018-05-15 | 2018-12-25 | 贵州杉海沿环保科技有限责任公司 | Refuse landfill drain processing unit |
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