CN103357642A - In-situ intensified aerobic stabilization method of municipal solid waste landfill - Google Patents
In-situ intensified aerobic stabilization method of municipal solid waste landfill Download PDFInfo
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- CN103357642A CN103357642A CN2013101661488A CN201310166148A CN103357642A CN 103357642 A CN103357642 A CN 103357642A CN 2013101661488 A CN2013101661488 A CN 2013101661488A CN 201310166148 A CN201310166148 A CN 201310166148A CN 103357642 A CN103357642 A CN 103357642A
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Abstract
The invention discloses an in-situ intensified aerobic stabilization method of a municipal solid waste landfill and belongs to environmental engineering. The municipal solid waste landfill is provided with a percolate collection vertical shaft and an air injection horizontal shaft in situ, so as to induce an intensified aerobic agent and fresh air; biomasses in scrap heaps are degraded in an aerobic environment rather than an anaerobic or quasi-anaerobic environment, so that wastes oxidation can be accelerated and the stabilization speed is increased; the percolate collection vertical shaft is arranged to pump out percolate in the scrap heaps and purifies the percolate to be used for preparing an intensified aerobic solution, so that a water resource can be circularly utilized and the content of pollutants in the scrap heaps can also be reduced; sealing and isolating measures including a wall, a vertical anti-seepage curtain and the like are arranged so as to control secondary pollution of the waste landfill in the intensified aerobic stabilization process; the in-situ intensified aerobic stabilization method disclosed by the invention can rapidly degrade the biomasses in the scrap heaps through intensified air and water cycle, has the characteristic of shortening the stabilization period of the waste landfill, and is suitable for biological repairing of the municipal solid waste landfill.
Description
Technical field
The invention discloses one way of life refuse landfill former address home position strengthening aerobic stabilization method, belong to the environmental project class.
Background technology
According to statistics, China has at present more than 3519 Simple Landfill Site, accounts for 29% of national household refuse landfill sites quantity, and the serious threat safety of surrounding environment is demanded restoration of the ecosystem urgently.By 2010, in 935 household refuse landfill sites in the whole nation not antiseepage accounted for 34%, environmental protection inspection and acceptance does not only have 26%, contamination accident happens occasionally.
Simultaneously, along with the propelling of urbanization process, a lot of early stage landfill yards of building have entered Urban New District, need to repair as early as possible to utilize, and natural degradation and stable period are very long, can not satisfy the land development demand fully.Nervous for solving urban land, implement the restoration of the ecosystem to the simple and easy landfill yard of outmoded type, and recover land development and efficiently utilize, progressively implement in each big city at home.
At present, representative recovery technique mainly comprises: (1) standard is closed, the method mainly is by the combination of junk-heap body surface coverage the vertical seepage control curtain to be set, and effectively isolates household refuse landfill sites and surrounding enviroment, and the control pollutant is on the impact of surrounding enviroment.(2) global transfer, the method mainly be with house refuse from simple and easy landfill yard dig out, sorting, and with undegradable rubbish again landfill in meeting the sanitary filling field that pollutes control criterion, simultaneously simple and easy landfill yard ruins internal contamination soil or underground water are repaired.
Based on above-mentioned restorative procedure analysis, only be that pollutant is isolated in the method (1), the actual reparation purpose that has not arrived fast and stable is simultaneously for landfill yard land used and storage capacity also unrealized recycling; Method (2) mainly is to carry out rubbish to shift, and not only quantities is large, and undegradable house refuse still needs landfill to take storage capacity, also unrealized effectively stable the processing.Two kinds of methods are not from realizing in essence house refuse fast and stable and place recycling.
Based on document analysis and environmental sanitation department achievement of investigation and research, house refuse is become thoroughly decomposed and can major part be degraded into fertile soil in 10 years～20 years, and contains abundant N, P, K in the fertile soil, is first-class forest fertilizer.According to statistics, the existing simple and easy household refuse landfill sites of outmoded type more than 90% of China was on active service more than 20 years, the house refuse of early stage landfill is become thoroughly decomposed substantially, the house refuse of middle and later periods landfill still needs the stable period grown, there is chronic pollution in various degree, has fast and stable and utilize requirement with whole recovery.
Repair behind the simple and easy household refuse landfill sites fast and stable needs to adopt more excavates, if directly adopt dystopy to process, then unavoidably causes surrounding enviroment to destroy, and brings secondary pollution.If but house refuse is carried out the original position preliminary treatment, and reach and implement again to excavate after stable, then can stop the secondary pollution accident.For this reason, invent a kind of original position fast and stable restorative procedure of simple and easy household refuse landfill sites, promote such household refuse landfill sites fast and stable and realize the place recycling, very necessary.
Summary of the invention
For above-mentioned existing problems, the object of the present invention is to provide one way of life refuse landfill former address home position strengthening aerobic stabilization method, the method is divided into following steps:
1. sealing isolation
Around the refuse landfill along junk-heap body arranged outside vertical seepage control curtain (3);
2. vertical shaft is set
In the inboard junk-heap body edge of vertical seepage control curtain (3) and/or heap body, leachate collection vertical shaft (4) is set;
In junk-heap body, arrange and strengthen aerobic solution fluid injection vertical shaft (5);
3. horizontal well is set
In garbage loading embeading heap body, gas-injection horizontal well (6) is set;
4. forced oxidation
To strengthening the aerobic solution of injection reinforcing in the aerobic solution fluid injection vertical shaft (5), aerobic solution enters in the leachate collection vertical shaft (4) through the junk-heap body diafiltration, from leachate collection vertical shaft (4), extract percolate out, percolate enters percolate treating apparatus (7) and purifies, and the water after the purification enters to be strengthened in the aerobic solution-preparation device (8);
In gas-injection horizontal well (6), inject fresh air.
The Bottom Altitude of described leachate collection vertical shaft (4) is lower than the Bottom Altitude of junk-heap body, the Bottom Altitude of leachate collection vertical shaft (4) is higher than the Bottom Altitude of vertical seepage control curtain (3), and the Bottom Altitude of strengthening aerobic solution fluid injection vertical shaft (5) is not less than the Bottom Altitude of junk-heap body.
The aerobic solution of described reinforcement is to be cooperated by the water behind the leachate purification, supplementing water and medicament to form, and medicament is oxidant and/or aerobic bacterial classification.
The temperature of the fresh air of described injection behind temperature-adjusting device (9) is not higher than 65 ℃.
Owing to adopted above technical scheme, the present invention arranges leachate collection vertical shaft and gas-injection horizontal well in the household refuse landfill sites former address, import and strengthen aerobic medicament and fresh air, change into aerobic by anaerobism or accurate anaerobism the biomass degradation process in the junk-heap body, accelerate the rubbish oxidation, improve steady rate; Strengthen aerobic solution for disposing after the interior percolate of leachate collection vertical shaft extraction junk-heap body and purification are set, both capable of recycling water resource can reduce again the pollutant load in the junk-heap body; The sealing quarantine measures such as enclosure wall, vertical seepage control curtain are set, the secondary pollution of control refuse landfill in strengthening the aerobic stabilization process; The present invention has and shortens the refuse landfill characteristics of stable period, the restoration of the ecosystem of applicable household refuse landfill sites by strengthening gas, water circulation raising junk-heap body endogenous substance fast degradation.
Description of drawings
Accompanying drawing is the schematic diagram of one way of life refuse landfill of the present invention former address home position strengthening aerobic stabilization method.
The specific embodiment
Now the specific embodiment of one way of life refuse landfill former address home position strengthening aerobic stabilization method is described in detail:
One way of life refuse landfill former address home position strengthening aerobic stabilization method comprises the steps,
1. sealing isolation
Around the refuse landfill along junk-heap body arranged outside vertical seepage control curtain 3, vertical seepage control curtain 3 can adopt continuous piling wall that Larsen stake, cement-bentonite grout slip casting form, antiseepage film etc., is used for the percolate of isolation vertical seepage control curtain 3 inboard junk-heap bodies and the underground water convection current in vertical seepage control curtain 3 outsides.The Bottom Altitude of vertical seepage control curtain 3 is lower than the junk-heap body Bottom Altitude.When level of ground water is higher, also should precipitation well point 2 be set all around in vertical seepage control curtain 3 outsides, the Bottom Altitude of precipitation well point 3 is higher than the Bottom Altitude of vertical seepage control curtain 3.
Enclosure wall 1, closed operation place are set around the outside of vertical seepage control curtain 3.
2. vertical shaft is set
In the junk-heap body edge of vertical seepage control curtain 3 inboards and/or heap body, leachate collection vertical shaft 4 is set.
In junk-heap body, arrange and strengthen aerobic solution fluid injection vertical shaft 5; Strengthening aerobic solution fluid injection vertical shaft 5 can utilize the air guide gabion well in the landfill yard or transform the air guide gabion well that uses in the landfill yard.
3. horizontal well is set
In garbage loading embeading heap body, gas-injection horizontal well 6 is set.
Gas-injection horizontal well 6 can be piled the scale of construction of body and the design feature of place, layering setting based on garbage loading embeading.
4. forced oxidation
To strengthening the aerobic solution of injection reinforcing in the aerobic solution fluid injection vertical shaft 5, aerobic solution enters in the leachate collection vertical shaft 4 through the junk-heap body diafiltration, from leachate collection vertical shaft 4, extract percolate out, percolate enters percolate treating apparatus 7 and purifies, and the water after the purification enters to be strengthened in the aerobic solution-preparation device 8.
In gas-injection horizontal well 6, inject fresh air.
The Bottom Altitude of described leachate collection vertical shaft 4 is lower than the Bottom Altitude of junk-heap body, the Bottom Altitude of leachate collection vertical shaft 4 is higher than the Bottom Altitude of vertical seepage control curtain 3, and the Bottom Altitude of strengthening aerobic solution fluid injection vertical shaft 5 is not less than the Bottom Altitude of junk-heap body.
The aerobic solution of described reinforcement is to be cooperated by the water behind the leachate purification, supplementing water and medicament to form, and medicament is oxidant and/or aerobic bacterial classification.
The temperature of the fresh air of described injection behind temperature-adjusting device 9 is not higher than 65 ℃.The fresh air that injects is also regulated temperature, provide sufficient oxygen for the living beings aerobic degradation on the one hand, the preferred ambient temperature of aerobic bacteria in the aerobic reaction process can be regulated and ensure to the heat that the fresh air that heats on the other hand carries, improve the activity of aerobic bacterial classification, accelerate old garbage aerobic oxidation.
Leachate collection vertical shaft 4 is connected by pipeline through suction pump 11 and percolate treating apparatus 7, percolate treating apparatus 7 with strengthen aerobic solution-preparation device 8 and be connected by pipeline, strengthen aerobic solution-preparation device 8 and be connected by pipeline by the aerobic solution fluid injection vertical shaft of water injecting pump 12 and reinforcement 5.
Each strengthens aerobic solution fluid injection vertical shaft 5 by the pipeline connection, and connecting the pipeline of respectively strengthening aerobic solution fluid injection vertical shaft 5 can in parallel or series connection.
Fresh air blower fan 10 is connected by pipeline through temperature-adjusting device 9 and gas-injection horizontal well 6.
Gas-injection horizontal well 6 connects by pipeline, and the pipeline that connects each gas-injection horizontal well 6 can in parallel or series connection.
During operation, adopt first water injecting pump will strengthen aerobic solution and pump into the aerobic solution fluid injection vertical shaft 5 of reinforcement, rear startup connects the suction pump of leachate collection vertical shaft 4, extract the percolate in the pumping shaft 4 out, purify through percolate treating apparatus 7, by strengthen aerobic solution-preparation device 8 supplementing water and add oxidant and/or aerobic bacterial classification after, adopt again water injecting pump will strengthen aerobic solution and pump into and strengthen in the aerobic solution fluid injection vertical shaft 5, realize water circulation.
Further specify in conjunction with case:
The simple and easy household refuse landfill sites oxidation of the outmoded type of case 1 southern area is stablized recovery project
Landfill yard area 2300m
2, mean depth 4m, depth capacity 6m, the content of organic matter is 42%, and the leachate COD of old rubbish and distilled water 1:1 is 15000mg/L, and BOD is 3200mg/L.
Adopt said method, the vertical seepage control curtain is the continuous piling wall of clay slip casting, the leachate collection vertical shaft is arranged on the junk-heap body edge of vertical seepage control curtain inboard, strengthen aerobic solution fluid injection vertical shaft injection reinforcing oxidizing agent solution---oxidizing agent solution, oxidizing agent solution enters the percolate collecting shaft through the junk-heap body diafiltration, extract out and process through the percolate treating apparatus from the leachate collection vertical shaft again, the backwater after percolate is processed is used for entering the aerobic solution-preparation device of reinforcement and prepares oxidizing agent solution.The connecting pipe of each leachate collection vertical shaft is in parallel.Whole engineering continues 30 days.
The connecting pipe of each gas-injection horizontal well is in parallel.Gas-injection horizontal well is established 4 layers altogether, and the interlamellar spacing of each layering is 1～1.5m, injects the fresh air of normal temperature, continuous operation 30 days.Organic matter reduces to 15% in the old rubbish, and the leachate COD of old rubbish and distilled water 1:1 is 2000mg/L, and BOD is 800mg/L.
The simple and easy household refuse landfill sites oxidation of the outmoded type in case 2 middle parts fast and stable recovery project
Landfill yard area 4500m
2, mean depth 5m, depth capacity 7m, the content of organic matter is 57%, and the leachate COD of old rubbish and distilled water 1:1 is 6000mg/L, and BOD is 900mg/L.
Adopt said method, the vertical seepage control curtain is continuous Larsen piling wall, the leachate collection vertical shaft is arranged in the junk-heap body edge and junk-heap body of vertical seepage control curtain inboard, strengthen aerobic solution fluid injection vertical shaft injection reinforcing oxidizing agent solution---the mixture solution of the arbitrary proportion of oxidant and aerobic bacterial classification, mixture solution enters the percolate collecting shaft through the junk-heap body diafiltration, extract out and process through the percolate treating apparatus from the leachate collection vertical shaft again, the backwater after percolate is processed is used for entering the aerobic solution-preparation device of reinforcement and prepares mixture solution.The connecting pipe of each leachate collection vertical shaft is in parallel.Whole engineering continues 30 days.
The connecting pipe series connection of each gas-injection horizontal well.Gas-injection horizontal well divides 5 layers of setting, and lift height is 1～1.4m, injects fresh air and is adjusted to 65 ℃ through temperature-adjusting device, continuous operation 45 days.Organic matter reduces to 19% in the old rubbish, and the leachate COD of old rubbish and distilled water 1:1 is 800mg/L, and BOD is 200mg/L.
The simple and easy household refuse landfill sites of the outmoded type in case 3 northern territories is strengthened and is stablized recovery project
Landfill yard area 3000m
2, mean depth 5m, depth capacity 8m, the content of organic matter is 37%, and the leachate COD of old rubbish and distilled water 1:1 is 4000mg/L, and BOD is 700mg/L.
Adopt said method, the vertical seepage control curtain is continuous Larsen piling wall, the leachate collection vertical shaft is arranged on the junk-heap body edge of vertical seepage control curtain inboard, strengthen aerobic solution fluid injection vertical shaft injection reinforcing oxidizing agent solution---aerobic bacterial classification solution, aerobic bacterial classification solution enters the percolate collecting shaft through the junk-heap body diafiltration, extract out and process through the percolate treating apparatus from the leachate collection vertical shaft again, the backwater after percolate is processed is used for entering the aerobic bacterial classification solution of the aerobic solution-preparation device preparation of reinforcement.The connecting pipe series connection of each leachate collection vertical shaft.Continuous operation 30 days.
The connecting pipe series connection of each gas-injection horizontal well.Gas-injection horizontal well divides 4 layers of setting, and lift height is 1～2m, and the fresh air of injection is adjusted to 35 ℃ through temperature-adjusting device, continuous operation 45 days.Organic matter reduces to 19% in the old rubbish, and the leachate COD of old rubbish and distilled water 1:1 is 800mg/L, and BOD is 200mg/L.
Claims (4)
1. one way of life refuse landfill former address home position strengthening aerobic stabilization method is characterized in that: described former address home position strengthening aerobic stabilization method comprises the steps,
1. sealing isolation
Around the refuse landfill along junk-heap body arranged outside vertical seepage control curtain (3);
2. vertical shaft is set
In the inboard junk-heap body edge of vertical seepage control curtain (3) and/or heap body, leachate collection vertical shaft (4) is set;
In junk-heap body, arrange and strengthen aerobic solution fluid injection vertical shaft (5);
3. horizontal well is set
In garbage loading embeading heap body, gas-injection horizontal well (6) is set;
4. forced oxidation
To strengthening the aerobic solution of injection reinforcing in the aerobic solution fluid injection vertical shaft (5), aerobic solution enters in the leachate collection vertical shaft (4) through the junk-heap body diafiltration, from leachate collection vertical shaft (4), extract percolate out, percolate enters percolate treating apparatus (7) and purifies, and the water after the purification enters to be strengthened in the aerobic solution-preparation device (8);
In gas-injection horizontal well (6), inject fresh air.
2. one way of life refuse landfill as claimed in claim 1 former address home position strengthening aerobic stabilization method, it is characterized in that: the Bottom Altitude of described leachate collection vertical shaft (4) is lower than the Bottom Altitude of junk-heap body, the Bottom Altitude of leachate collection vertical shaft (4) is higher than the Bottom Altitude of vertical seepage control curtain (3), and the Bottom Altitude of strengthening aerobic solution fluid injection vertical shaft (5) is not less than the Bottom Altitude of junk-heap body.
3. one way of life refuse landfill as claimed in claim 1 former address home position strengthening aerobic stabilization method, it is characterized in that: the aerobic solution of described reinforcement is to be cooperated by the water behind the leachate purification, supplementing water and medicament to form, and medicament is oxidant and/or aerobic bacterial classification.
4. one way of life refuse landfill as claimed in claim 1 former address home position strengthening aerobic stabilization method, it is characterized in that: the temperature of the fresh air of described injection behind temperature-adjusting device (9) is not higher than 65 ℃.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105903762A (en) * | 2016-05-24 | 2016-08-31 | 北京建工环境修复股份有限公司 | Soil remediation method |
| CN105921482A (en) * | 2016-07-11 | 2016-09-07 | 中国环境科学研究院 | Rural domestic waste treatment system and process based on quasi-aerobic landfill |
| CN107931298A (en) * | 2017-11-24 | 2018-04-20 | 南京万德斯环保科技股份有限公司 | The fast and stable minimizing device in situ and minimizing processing method of a kind of house refuse heap body |
| CN113145619A (en) * | 2021-05-06 | 2021-07-23 | 南京大学 | Complex container combined ex-situ aerobic stabilization system and method |
| CN114562824A (en) * | 2022-01-25 | 2022-05-31 | 浙江大学 | Heat energy collecting and power generating utilization system for household garbage landfill |
| CN114602923A (en) * | 2021-09-10 | 2022-06-10 | 浙江大学 | Sectional type horizontal pumping and injecting system and method for accelerating degradation and stabilization of refuse landfill |
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| CN114602923A (en) * | 2021-09-10 | 2022-06-10 | 浙江大学 | Sectional type horizontal pumping and injecting system and method for accelerating degradation and stabilization of refuse landfill |
| CN114562824A (en) * | 2022-01-25 | 2022-05-31 | 浙江大学 | Heat energy collecting and power generating utilization system for household garbage landfill |
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Application publication date: 20131023 |