CN111236322A - Simple landfill garbage leachate collection system - Google Patents
Simple landfill garbage leachate collection system Download PDFInfo
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- CN111236322A CN111236322A CN201811447093.7A CN201811447093A CN111236322A CN 111236322 A CN111236322 A CN 111236322A CN 201811447093 A CN201811447093 A CN 201811447093A CN 111236322 A CN111236322 A CN 111236322A
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- 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
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/02—Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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Abstract
The invention relates to a garbage leachate collecting system for a simple landfill, which comprises an ecological protection system and a leachate collecting system, wherein the ecological protection system is positioned on the surface of the simple landfill, the ecological protection system is provided with an ecological barrier layer, the ecological barrier layer directly covers the surface of a pollution source of the simple landfill, the leachate collecting system is provided with leachate collecting ditches and leachate adjusting pools, the leachate collecting ditches are distributed around the side with the lowest potential of the simple landfill, the leachate collecting ditches and the pollution source are isolated by water passing walls, and the leachate adjusting pools are positioned at the lowest potential of the simple landfill and are communicated with the leachate collecting ditches. The simple landfill garbage leachate collection system achieves the purposes of controlling pollution and collecting garbage leachate in a surface covering and low-level collection mode. Provides necessary prepositive technology for treating simple landfill sites.
Description
Technical Field
The invention relates to a simple landfill garbage leachate collecting system.
Background
Along with the improvement of living standard, the garbage output industry in China is greatly increased. In the prior art, the domestic garbage is frequently treated by a landfill method, a burning method and a composting method, and the landfill method is adopted in most areas of China. In the 80 s of the 20 th century, the landfill treatment of domestic garbage in most cities in China belongs to a simple stacking mode, so that the peripheries of a plurality of cities are surrounded by simple landfills left by the histories at present, and the urban population dense area is closer to the simple landfills originally located in suburbs due to the development and expansion of the cities. The early-stage landfill of the simple landfill sites is not standard, measures such as anti-seepage treatment, gas control, percolate collection treatment and the like of the landfill sites are not carried out, even if the landfill sites are not filled, the landfill sites are rotten due to long-term complex physical and chemical change effects and the degradation characteristics of the landfill sites, and a large amount of gas and percolate can be generated in the process of rotten landfill. The gas and the percolate generated in the garbage rotting process are discharged at will without being effectively controlled. The landfill leachate directly flows to a river channel or permeates into an underground water layer, so that the water quality of the river channel or the underground water is seriously polluted, and the water quality of the river channel can not meet the requirement of environmental functions after being influenced. The gas generated by the simple landfill site comprises carbon dioxide, methane, hydrogen sulfide and the like, the gas is large in quantity and can form stink, the gas contains various toxic and harmful substances, the air pollution to the simple landfill site and the surrounding environment is great, and the living environment and the physical and mental health of residents around the landfill site are directly threatened. The method has the advantages that the method cannot be effectively controlled due to inherent structural defects of the simple landfill site, and the method becomes an obvious unstable factor in the urban development process, so that the sustainable development of local economy, society and environment and the construction process of a harmonious society are severely restricted.
As mentioned above, the simple landfill site has no pretreatment, no anti-seepage treatment, no gas control, and no leachate collection treatment. The malodorous gas in the simple landfill is in a disordered discharge state; a large amount of percolate generated in the process of water accumulation and garbage degradation is also in a disordered discharge state; a great amount of bacteria and flying dust are generated, a great amount of mosquitoes and flies are bred, and the like, which brings many negative effects to the surrounding environment. The existing garbage disposal process is carried out on the basis of a complete anti-seepage and closed structure, so that the prior art cannot effectively solve the problem of pollutant collection and protection of the simple landfill.
Disclosure of Invention
The invention aims to solve the technical problem of how to collect seeped pollutants of a simple landfill, thereby obtaining a simple landfill garbage leachate collecting system.
In order to solve the technical problems, the invention adopts the following technical scheme: this simple and easy landfill rubbish filtration liquid collection system includes ecological protection system, filtration liquid collection system, ecological protection system is located simple and easy landfill surface, ecological protection system is equipped with ecological barrier layer, ecological barrier layer directly covers the pollution source surface at simple and easy landfill, ecological barrier layer includes gravel layer, the compound geomembrane of HDPE, cobble layer, gravel layer, the compound geomembrane of HDPE, cobble layer are arranged one by one in the action of gravity direction, filtration liquid collection system is equipped with filtration liquid collection ditch and filtration liquid equalizing basin, states the filtration liquid and collects the ditch around the minimum side distribution of simple and easy landfill position, and keeps apart through crossing the water wall between filtration liquid collection ditch and the pollution source, filtration liquid equalizing basin is located the minimum of the position of simple and easy landfill and collects the ditch intercommunication with filtration liquid.
The ecological protection system mainly serves the ecological environment of the earth surface and has the primary function of preventing gas exhausted by a pollution source in the simple landfill from entering air as much as possible; thus, the ecological protection system is arranged on the surface of the simple landfill. The ecological barrier layer is used as a core structure of an ecological protection system and comprises a three-layer structure, wherein a pebble layer is used for paving a hard substrate on the surface of a pollution source so as to lay an HDPE (high-density polyethylene) composite geomembrane flatly, and a gravel layer covers the HDPE composite geomembrane to provide a flat surface for the whole ecological barrier layer and provide shading and protection functions for the HDPE composite geomembrane. When solving the gas discharge problem, collect landfill leachate through leachate collecting system in this technical scheme. Although the pollution source of the simple landfill, i.e. the garbage, is in contact with the ground, the permeable part of the percolate is limited to the soft surface layer of the ground, and the hard part of the ground can block the diffusion of the percolate, so the percolate collecting ditch can collect the percolate from the ground if the percolate collecting ditch is deep enough. In practice, the depth is generally the landfill depth of a simple landfill. The diffusion of the percolate is realized by gravity, so the percolate collecting ditch is arranged at the lowest side of the simple landfill site. Leachate collected from the leachate collection trough is collected in a leachate conditioning tank, whereby control of landfill leachate is obtained.
The leachate is isolated after being collected, the leachate is subjected to sealing treatment, which plays an important role in avoiding secondary pollution, for this reason, the leachate collecting ditch is of a closed structure, the leachate collecting system further comprises a rainwater collecting ditch which is also distributed around the lowest side of the potential of the simple landfill site, the rainwater collecting ditch is positioned on the surface of the simple landfill site, the ecological protection system is positioned on one side of the rainwater collecting ditch, and the leachate collecting ditch is positioned on the other side of the rainwater collecting ditch. In the technical scheme, rainwater is isolated from the percolate, so that the percolate is prevented from being diluted to generate more pollutants; and to prevent other foreign contaminants from penetrating into the leachate.
In the technical scheme, the thickness of the gravel layer is 20-40 cm, and the thickness of the pebble layer is 10-20 cm. The design can further compact the simple landfill site, and can obtain a solid bearing surface, thereby facilitating the basic requirements of mechanical construction on the infrastructure.
The treatment of simple landfills not only requires technical solutions for essentially treating the problems, but also requires consideration of the specific beautifying effect of the beautiful environment in the process of treating the environment. For this reason, ecological protection system still includes ecological restoration layer, ecological restoration layer includes planting clay and afforestation vegetation, afforestation vegetation is planted in planting clay, ecological restoration layer is located ecological barrier layer surface. The ecological restoration layer plays a role in beautifying the environment and has a certain function of purifying air, so that the land of the simple landfill site is convenient to recycle.
Preferably, the greening vegetation is one or more of zoysia japonica, buffalo grass, bermuda grass, carpet grass, blumea grass, eremochloa ophiuroides, ryegrass, bluegrass and glume grass.
Ecological protection system still is equipped with the foul smell and collects the subassembly, the gaseous subassembly of collecting includes gaseous drainage guide pipe, air exhauster and foul smell treatment facility, gaseous drainage guide pipe is located the planting clay on ecological restoration layer, gaseous drainage guide pipe passes through the gas-supply pipe and is connected with the air exhauster, the air exhauster passes through the gas-supply pipe and is connected with foul smell treatment facility.
The invention adopts the technical scheme that: the simple landfill garbage leachate collection system achieves the purposes of controlling pollution and collecting garbage leachate in a surface covering and low-level collection mode. Provides necessary prepositive technology for treating simple landfill sites.
Drawings
The present invention will be described in more detail with reference to the accompanying drawings and embodiments.
FIG. 1 is a schematic diagram of a first embodiment of the simple landfill leachate collection system of the present invention in use I;
fig. 2 is a schematic diagram ii illustrating the use of the simple landfill leachate collection system according to the first embodiment of the present invention.
Fig. 3 is a schematic structural view of an odor collection assembly of a first embodiment of a simple landfill leachate collection system of the invention.
Detailed Description
The first embodiment of the present invention.
The pollution source in the simple landfill, namely the garbage, is directly contacted with the ground surface, and the exudation liquid is gradually compacted in the process of blowing wind and rain in the years.
As shown in fig. 1 and 2, the simple landfill leachate collecting system includes an ecological protection system and a leachate collecting system.
The percolate collecting system is formed by a building structure which is arranged at the lowest side of the simple landfill and is embedded into the ground surface, and comprises a percolate collecting ditch 1, a percolate adjusting tank 2 and a rainwater collecting ditch 3. The main body of the percolate collecting ditch 1 is formed by combining a reinforced concrete wall body 4, a water passing wall 5 and a reinforced concrete cover plate 6, the cross section of the reinforced concrete wall body 4 is L-shaped, the water passing wall 5 is built by perforated bricks, a plurality of through holes are formed in the surface of the water passing wall 5, the water passing wall 5 is positioned on one side of the reinforced concrete wall body 4, the water passing wall 5 and the reinforced concrete wall body 4 jointly form a structure with a U-shaped cross section, the structure formed by the water passing wall 5 and the reinforced concrete wall body 4 is embedded in the ground surface, and the water passing wall 5 is directly contacted with a pollution source of a simple landfill site; the depth of the reinforced concrete wall 4 buried underground exceeds the depth of the pollution source buried underground, even exceeds the depth of the soft surface layer of the earth surface and the hard part of the earth surface which can be penetrated by the percolate, so that one side of the pollution source of the simple landfill is enabled to be completely opposite to the water passing wall 5, and the percolate leaked out by the simple landfill can completely flow into the reinforced concrete wall 4. The reinforced concrete cover plate 6 is placed on the top of a structure formed by the water passing wall 5 and the reinforced concrete wall 4 together, a tubular cavity structure is formed by the water passing wall 5, the reinforced concrete cover plate, the reinforced concrete wall 4 and the water passing wall together, the inner cavity of the tubular cavity structure is the area where the percolate collecting ditch 1 is located, and the through hole on the surface of the water passing wall 5 is communicated with the percolate collecting ditch 1; therefore, the percolate collecting ditch 1 is of a closed structure. In order to facilitate observation of an operator, manholes distributed at intervals are arranged on the reinforced concrete cover plate 6. The percolate adjusting tank 2 is also positioned at the lowest part of the simple landfill site, and the percolate adjusting tank 2 is also formed by a building structure embedded into the ground surface and is a water tank structure built by solid bricks. The percolate adjusting tank 2 is communicated with the percolate collecting ditch 1, percolate flowing out of a pollution source is firstly collected in the percolate collecting ditch 1 and flows into the percolate adjusting tank 2 through the self gravity.
The rainwater collecting ditch 3 is also formed by a building structure embedded in the ground surface and is a ditch structure built by solid bricks. Rainwater collecting ditch 3 also distributes around the minimum one side of simple and easy landfill relief, and rainwater collecting ditch 3 is located the outside of crossing waterwall 5 and is located the top of crossing waterwall 5, and rainwater collecting ditch 3 is open structure, and it is located simple and easy landfill surface, and rainwater collecting ditch 3 sets up the export and directly introduces the rainwater of collecting into the earth's surface in the minimum of relief.
The ecological protection system comprises an ecological barrier layer 7, an ecological restoration layer 8 and an odor collection component. The ecological protection system is positioned on the surface of the simple landfill, wherein the ecological barrier layer 7 directly covers the surface of a pollution source of the simple landfill, and the ecological restoration layer 8 covers the upper part of the ecological barrier layer 7. The ecological protection system is close to the rainwater collection ditch 3, so that the ecological protection system is positioned on one side of the rainwater collection ditch 3, and the percolate collection ditch 1 is positioned on the other side of the rainwater collection ditch 3.
The ecological barrier layer 7 mainly has the main functions of inhibiting gas exhausted from a pollution source from diffusing to the atmosphere and preventing rainwater from permeating into the pollution source as much as possible, and comprises a gravel layer, an HDPE (high-density polyethylene) composite geomembrane and a pebble layer, wherein the gravel layer, the HDPE composite geomembrane and the pebble layer are arranged one by one in the gravity action direction, namely the pebble layer is positioned on the pollution source of the simple landfill, the HDPE composite geomembrane is positioned on the pebble layer, and the gravel layer is positioned on the HDPE composite geomembrane. The thickness of the gravel layer is 20 cm, and the thickness of the pebble layer is 20 cm. The pebble layer is formed by paving pebbles with the average grain diameter larger than 5 mm, can cover the surface of a pollution source of the simple landfill in a relatively compact contact mode, and obtains a flat upper surface on the surface of the pebble layer; the probability of the filler being trapped in the contaminant must be considered when the pebble layer is laid, which is why the pebbles are used in this embodiment. The HDPE composite geomembrane is a waterproof barrier material produced by taking high-density polyethylene resin as a raw material, and is widely used in seepage prevention projects of domestic garbage landfill, solid waste landfill, sewage treatment plant, artificial lake, tailing treatment and the like. The pebble layer provides a flat surface, which allows the HDPE composite geomembrane to spread out flat. The gravel layer is formed by laying gravels with the average grain diameter larger than 2 mm, and the compactness degree of the gravel layer is far larger than that of the gravel layer, which is the reason for arranging the ecological restoration layer 8 on the gravel layer. The ecological restoration layer 8 includes planting clay and greening vegetation. The planting clay is easy to run off when meeting water, has water absorption, and the loose structure of the gravel layer can just make up the defects of the planting clay when meeting water, and plays roles of reinforcement, hydrophobicity and ventilation. The greening vegetation is planted in planting clay. In this embodiment the greening vegetation is zoysia japonica. As shown in fig. 3, the gas collecting assembly includes a gas guide and discharge pipe 9, a suction fan 10 and an odor treating device 11. The main body of the gas guide and exhaust pipe 9 is a tubular structure, one end of the gas guide and exhaust pipe is a hemispherical structure, and the surface of the gas guide and exhaust pipe is provided with dense air holes which can ensure that the inside of the gas guide and exhaust pipe 9 is directly communicated with the outside. The gas discharging pipes 9 are distributed in the planting clay of the ecological restoration layer 8 in a matrix arrangement, so that the odor permeating from the planting clay of the ecological restoration layer 8 can be collected into the gas discharging pipes 9. All the gas guide and discharge pipes 9 are connected with an exhaust fan 10 through gas pipes, and the exhaust fan 10 is connected with an odor treatment device 11 through gas pipes. The exhaust fan 10 extracts the odor in the gas guide and exhaust pipe 9 and sends the odor into the odor treatment device 11, and the odor is treated by the odor treatment device 11 and then is discharged into the atmosphere.
Liquid flows to the low position of relief all the time in the influence of gravity, and simple and easy landfill site landfill leachate collection system sets up the minimum side in simple and easy landfill site relief, therefore, the filtration liquid can flow into in the simple and easy landfill leachate collection system automatically, and meanwhile, the gas that simple and easy landfill produced is blocked the diffusion path completely and can't be discharged into the atmosphere in the middle of, from control filtration liquid, restrain gaseous diffusion two aspects of scattering. The effective control of pollutants in the simple landfill is realized.
A second embodiment of the invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 40 cm, the pebble layer has a thickness of 10 cm, and the greening vegetation is boswellia hortorum.
A third embodiment of the present invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 25 cm, the pebble layer has a thickness of 20 cm and the greening vegetation is bermudagrass.
A fourth embodiment of the present invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 30 cm, the pebble layer has a thickness of 13 cm and the greening vegetation is carpeting grass.
A fifth embodiment of the present invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 35 cm, the pebble layer has a thickness of 19 cm and the greening vegetation is blunted grass.
A sixth embodiment of the present invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 20 cm, the pebble layer has a thickness of 20 cm, and the greening vegetation is eremochloa ophiuroides.
A seventh embodiment of the invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 22 cm, the pebble layer has a thickness of 20 cm and the greening vegetation is ryegrass.
An eighth embodiment of the present invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 30 cm, the pebble layer has a thickness of 15 cm, and the greening vegetation is poa annua.
A ninth embodiment of the invention. This embodiment differs from the first embodiment in that the thickness of the gravel layer is 30 cm, the thickness of the pebble layer is 15 cm, and the greening vegetation is cut-strand glume.
A tenth embodiment of the invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 40 cm, the pebble layer has a thickness of 15 cm, and the greening vegetation is boswellia longituba and bermudagrass.
An eleventh embodiment of the present invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 26 cm, the pebble layer has a thickness of 20 cm, and the greening vegetation is bermudagrass and carpeting.
A twelfth embodiment of the invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 35 cm, the pebble layer has a thickness of 13 cm, and the greening vegetation is carpeting grass and blunt-leaved grass.
A thirteenth embodiment of the invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 35 cm, the pebble layer has a thickness of 19 cm, and the greening vegetation is grass of the blunt leaf and eremochloa ophiuroides.
A fourteenth embodiment of the present invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 25 cm, the pebble layer has a thickness of 20 cm, and the greening vegetation is eremochloa ophiuroides and ryegrass.
A fifteenth embodiment of the present invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 30 cm, the pebble layer has a thickness of 20 cm, and the greening vegetation is ryegrass and poa annua.
A sixteenth embodiment of the present invention. This embodiment differs from the first embodiment in that the gravel layer has a thickness of 30 cm, the pebble layer has a thickness of 15 cm, and the greening vegetation is poa annua and glume-cutting.
A seventeenth embodiment of the present invention. This embodiment differs from the first embodiment in that the thickness of the gravel layer is 30 cm, the thickness of the pebble layer is 15 cm, and the greening vegetation is grass clippings and kohlrabi.
Claims (6)
1. The utility model provides a simple and easy landfill rubbish filtration liquid collecting system which characterized in that: the simple landfill garbage leachate collecting system comprises an ecological protection system and a leachate collecting system, the ecological protection system is positioned on the surface of the simple landfill and is provided with an ecological barrier layer (7), the ecological barrier layer (7) directly covers the surface of a pollution source of the simple landfill, the ecological barrier layer (7) comprises a gravel layer, an HDPE (high-density polyethylene) composite geomembrane and a pebble layer, the gravel layer, the HDPE composite geomembrane and the pebble layer are arranged one by one in the gravity action direction, the percolate collecting system is provided with a percolate collecting ditch (1) and a percolate adjusting tank (2), the percolate collecting ditch (1) is distributed around the lowest side of the simple landfill site, and the percolate collecting ditch (1) is isolated from the pollution source by a water wall (5), the percolate adjusting tank (2) is positioned at the lowest part of the simple landfill and is communicated with the percolate collecting ditch (1).
2. The simple landfill leachate collection system of claim 1, wherein: the leachate collection ditch (1) is of a closed structure, the leachate collection system further comprises a rainwater collection ditch (3), the rainwater collection ditch (3) is distributed around the lowest side of the potential of the simple landfill site, the rainwater collection ditch (3) is located on the surface of the simple landfill site, the ecological protection system is located on one side of the rainwater collection ditch (3), and the leachate collection ditch (1) is located on the other side of the rainwater collection ditch (3).
3. The simple landfill leachate collection system of claim 1, wherein: the thickness of the gravel layer is 20-40 cm, and the thickness of the pebble layer is 10-20 cm.
4. The simple landfill leachate collection system of claim 1, wherein: the ecological protection system further comprises an ecological restoration layer (8), wherein the ecological restoration layer (8) comprises planting clay and greening vegetation, the greening vegetation is planted in the planting clay, and the ecological restoration layer (8) is located on the surface of an ecological barrier layer (7).
5. The simple landfill leachate collection system of claim 4, wherein: the greening vegetation is one or more of zoysia japonica, wild cattle grass, bermudagrass grass, carpet grass, blumea, eremochloa ophiuroides, ryegrass, poa pratensis and glume grass.
6. The simple landfill leachate collection system of claim 4, wherein: ecological protection system still is equipped with the foul smell and collects the subassembly, the gas collection subassembly includes gas guide's calandria (9), air exhauster (10) and foul smell treatment facility (11), gas guide's calandria (9) are located the planting clay of ecological restoration layer (8), gas guide's calandria (9) are connected with air exhauster (10) through the gas-supply pipe, air exhauster (10) are connected with foul smell treatment facility (11) through the gas-supply pipe.
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| CN201811447093.7A CN111236322A (en) | 2018-11-29 | 2018-11-29 | Simple landfill garbage leachate collection system |
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| CN201811447093.7A CN111236322A (en) | 2018-11-29 | 2018-11-29 | Simple landfill garbage leachate collection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123446A (en) * | 2021-05-12 | 2021-07-16 | 贵州万通环保工程有限公司 | Seepage-proofing separation system of sewage regulation treatment tank |
| CN114031256A (en) * | 2021-11-22 | 2022-02-11 | 湘潭大学 | Sludge-water separation system for sludge landfill and construction method thereof |
-
2018
- 2018-11-29 CN CN201811447093.7A patent/CN111236322A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123446A (en) * | 2021-05-12 | 2021-07-16 | 贵州万通环保工程有限公司 | Seepage-proofing separation system of sewage regulation treatment tank |
| CN114031256A (en) * | 2021-11-22 | 2022-02-11 | 湘潭大学 | Sludge-water separation system for sludge landfill and construction method thereof |
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