CN100531942C - On-spot treatment method for leachate of landfill field - Google Patents
On-spot treatment method for leachate of landfill field Download PDFInfo
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- CN100531942C CN100531942C CNB2004100160793A CN200410016079A CN100531942C CN 100531942 C CN100531942 C CN 100531942C CN B2004100160793 A CNB2004100160793 A CN B2004100160793A CN 200410016079 A CN200410016079 A CN 200410016079A CN 100531942 C CN100531942 C CN 100531942C
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- 238000000034 method Methods 0.000 title abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 42
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002699 waste material Substances 0.000 claims description 42
- 239000004744 fabric Substances 0.000 claims description 12
- 230000004060 metabolic process Effects 0.000 claims description 9
- 239000002689 soil Substances 0.000 claims description 8
- 239000004746 geotextile Substances 0.000 claims description 7
- 239000004927 clay Substances 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 240000004050 Pentaglottis sempervirens Species 0.000 claims description 2
- 235000004522 Pentaglottis sempervirens Nutrition 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 239000002352 surface water Substances 0.000 abstract description 2
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 239000002957 persistent organic pollutant Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000004575 stone Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000011026 diafiltration Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000005446 dissolved organic matter Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000007269 microbial metabolism Effects 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The present invention is in-situ percolate treating process in life garbage landfill. Special garbage treating layer to generate methane is first obtained with biological treating apparatus outside the landfill; and the garbage treating layer with anaerobic microbe, middle water distributing layer and surface water distributing layer is utilized for percolate to contact homogeneously with the anaerobic microbe to convert organic pollutant in percolate into landfill gas capable of being further utilized. The present invention has homogeneous flow of percolate, stable and high percolate treating effect, low power consumption and low cost, and may be used in various kinds of garbage landfill to treat and utilize percolate.
Description
Technical field
The present invention relates to a kind of method of in landfill yard, handling percolation liquid of city life garbage landfill.
Background technology
The percolate that city life garbage landfill produces contains pollutant levels height (its chemical oxygen demand COD content can reach 50,000mg/L or higher), and intractability is big.The pollution control treatment technology of percolate can be divided into two big classes: a class is to handle outside the venue, after soon landfill percolate is collected, is delivered to sewage treatment facility, utilizes various organic sewage treatment technologies to handle.Because it is similar to the processing of other organic sewages that percolate is handled applied concrete technical unit outside the venue, so processing cost is very high, and because landfill yard is in the different runtimes, its leachate quality water yield alters a great deal, outside the venue the Technological Economy of Chu Liing to improve difficulty very big.Another kind of is in a treatment technology, promptly utilize the garbage loading embeading layer as the reactor of handling percolate, by the metabolic activity of the anaerobic bacteria that grows in the landfill layer, the organic pollution in the degraded percolate.At present, what handle employing in the percolate field is with percolate circulation (recharging) method to the landfill layer, the percolate of circulation seepage flow in the landfill body contacts with wherein anaerobic metabolism microorganism, pollutant wherein is landfill gas (main component: methane and carbon dioxide) by microbial metabolism, makes water correction.The percolate treatment facility investment of the method can be lower than outside the venue significantly to be handled, and landfill body volume is big, has sufficient buffer capacity, the leachate quality fluctuation can not cause tangible influence to treatment effect, simultaneously, the percolate pollutant is metabolised to flammable landfill gas inside, and the resource that has also increased landfill yard reclaims potentiality.Chinese invention patent (publication number CN1422815A) discloses processing method in the field that a kind of percolate circulates in the landfill layer, perform the oxygen Biological Pretreatment earlier outside the venue after it is characterized by leachate collection, then after circulating pump promotes, make the percolate processing that is purified by the diafiltration in the landfill layer of the circulation water distributor in the intermediate cover layer of each step of landfill layer.This method can purify percolate effectively, but because the method need are laid percolate circulation water distribution pipe network in the intermediate cover layer of each step of landfill layer, carry out simultaneously the percolate circulation in the whole service phase of landfill yard constantly, investment and operating cost that percolate is handled are all higher.
Summary of the invention
The object of the present invention is to provide a kind of with low cost, method that the simple landfill percolate of technology is handled in the landfill yard field.
Technical scheme of the present invention is: utilize in the landfill yard at first one deck rubbish of landfill as the special-purpose garbage disposal layer of the percolate in the field, leachate collection with this layer generation extremely carries out preliminary treatment outside the venue earlier, and then irritate layer so far by surperficial water distribution blowback, it is stable that rubbish is quickened, methanation microbial growth in the promoting layer makes this layer possess the percolate disposal ability simultaneously.Because water distribution uniformity layer and surperficial water distribution layer in the middle of in the landfill process of this layer, being provided with, can flow to the percolate of this layer of flowing through and distribute again, make its this layer of flowing through equably, organic pollution is wherein fully contacted with a layer interior microorganism, with the pollutant metabolism is landfill gas (main component: methane and carbon dioxide), reaches the purpose that leachate quality improves.Specifically carry out in two steps:
The first step is laid the landfill yard of impervious barrier at oneself, lays the leachate collection layer.On the leachate collection layer, begin landfill waste, when waste layer thickness reaches 1.5～2.0m, on this layer, cover the middle water distribution uniformity layer of one deck, middle water distribution uniformity layer is formed with building to lay after sand evenly mixes by 1: 1 volume ratio by the bird's-eye gravel of particle diameter 5～30mm, its thickness is greater than 0.2m, continue landfill waste on it after form thick another layer waste layer of 1.5～2.0m, on the waste layer surface, evenly cover the compacting soil layer that 0.3m is thick at least again, establish the perforation water distributor on compacting soil layer upper berth, the perforation water distributor is connected to the cloth supply mains, perforation water distributor upper edge pipe range covers geotextiles, constitutes special-purpose garbage disposal layer.Leachate collection is confluxed to the percolate storage pond on next door, after up flow type filter bed anaerobic bio-treated or intermission aerobic biological treatment, make the COD content of handling water outlet be less than or equal to 3000mg/L, the pH value is more than or equal to after 7.5, to handle water outlet and be delivered to the cloth supply mains, and after oozing out, above-mentioned perforation water distributor in the landfill waste layer, circulates, the hydraulic load of percolate circulation is by this waste layer surface area, should be more than or equal to 15mm/d, began to circulate back 6 months, from gas collection well, collect gas and carry out sample analysis, when containing the methane volume ratio in the gas greater than 50% the time, this waste layer has promptly reached stable product methane phase and has formed special-purpose garbage disposal layer, the circular flow that can stop to carry out a biological disposal upon outside the venue this moment.
In second step, the special-purpose garbage disposal layer with above-mentioned product methane phase as the Anaerobic Treatment reactor, continues landfill waste thereon, covers waste layer in the formation.When on when covering waste layer and covering to porous water distributor position, the clay of water distributor top should be dug out removing, this position will form the passage that the percolate that covers waste layer flows downward, and make percolate obtain once distributing at this again.When percolate continued to flow downward to the centre water distribution layer, percolate was evenly distributed once more.Like this, the percolate that covers waste layer is fully contacted with methanation flora in the special-purpose garbage disposal layer that enters the stable product methanation stage at this, making the organic pollution in the percolate is that landfill gas is effectively degraded through anaerobic metabolism, and this landfill gas is collected through gas and is used after well is collected.Remaining percolate is qualified discharge after the direct or further advanced treating of storage pond.
In addition after the special-purpose garbage disposal layer formation as the Anaerobic Treatment reactor, remaining element is by sanitary landfills mode landfill waste layer inside, after the percolate of its generation is collected by the leachate collection layer of these unit lower floors, be delivered to the cloth supply mains by the cloth water pump, filtration process in special-purpose garbage disposal layer, leachate recirculation is during to special-purpose garbage disposal layer, and its unit are hydraulic load should be controlled at below the 30mm/d.
Outstanding effect of the present invention is as follows:
1. because technology of the present invention needs only disposable short-term carries out a biological disposal upon outside the venue and prepare the special-purpose garbage disposal layer that produces methane phase, percolate is handled as the Anaerobic Treatment reactor with it, needn't adopt the leachate recirculation means just can continuously handle later on to the percolate that covers the waste layer generation in the continuous interpolation, the pollutant metabolism that makes percolate is a landfill gas, reach the purpose that leachate quality is improved, therefore the present invention can save water distribution pipe network facilities and the percolate transmitting power energy consumption and the expense of each required intermediate cover layer of long-term percolate circulated backfilling, has the benefit that investment is saved and expense is saved.
2. technology of the present invention avoided because of behind the percolate circulated backfilling at the inhomogeneous treatment effect instability problem that causes of landfill intrastratal flow; Need not simultaneously whole landfill field structure structure transformed to reach to make the percolate uniform purpose that flows.Both improve treatment effect, also controlled the rising of investment and operating cost.
3. pass through the preliminary treatment outside the venue of percolate, the special-purpose garbage disposal layer that has quickened percolate enters the methanation metabolism stage, the dissolved organic matter that can be to greatest extent landfill yard be produced change into have value, flammable landfill gas, have the benefit of the utilization of resources.
Description of drawings
Fig. 1 is a process chart of the present invention
Fig. 2 is the schematic diagram that mountain valley-type landfill percolate of the present invention is handled
Fig. 3 is an A node enlarged diagram of the present invention
Fig. 4 is the schematic diagram that flat type landfill percolate of the present invention is handled
The specific embodiment
See also Fig. 1,2,3.Before carrying out garbage loading embeading, at first should on basic soil layer 1, the requirement by sanitary filling field lay impervious barrier 2, and then lay leachate collection layer 3, and on leachate collection layer 3, begin the special-purpose garbage disposal layer 4 of landfill.Before the landfill waste, should be separated to form landfill subregion, the about 1000m of each subregion area every bank (high about 1m) with soil
2When waste layer landfill thickness reaches 1.5～2.0m, on this layer, evenly lay by graded broken stone and building sand and mix the middle water distribution uniformity layer 5 that forms, graded broken stone particle diameter 5～30mm, graded broken stone is volume ratio 1:1 with the proportioning of building sand.After continuing landfill waste to thickness on the middle water distribution uniformity layer 5 and reaching 1.5～2.0m, re-lay porous water distributor 8, and with geotextiles 9 and 7 coverings of compacting soil layer, form surperficial water distribution layer.Porous water distributor 8 diameters 100～150mm, material is advisable with PVC; The even perforate of its lower half, aperture 8mm, hole center distance 16mm.Porous water distributor 8 is parallel laying on waste layer.The sealing of one end, an end links to each other with cloth supply mains 13, porous water distributor 8 spacings 5～10m.The width of the geotextiles 9 that covers on the porous water distributor 8 is 0.5m, covers whole piece porous water distributor 8, the density 200g of geotextiles～400g/m along the pipe range direction
2The permeability of the compacting clay 7 that the surface water distribution layer covers should be less than 1 * 10
-5Cm/s, average thickness 〉=0.3m.Constituted special-purpose garbage disposal layer thus.Then, the percolate of collecting from leachate collection layer 3 is being handled in the preliminary treatment facility 11 earlier outside the venue, preliminary treatment facility 11 comprises storage pond and intermission aerobic bioreactor (SBR) or upflow type anaerobic bacteria bed (UBF) outside the venue, as the COD of preliminary treatment water outlet concentration≤3000mg/L, pH〉7.5 o'clock, through circulating pump 12 and cloth supply mains 13 circulated backfillings to special-purpose garbage disposal layer, contain the methane volume ratio in the gas of collecting the well 6 greater than 50% the time when collecting from gas, prove that this layer rubbish has entered stable product methane phase, can stop the operation of treatment facility 11 and circulating pump 12 outside the venue this moment, preliminary treatment is outside the venue ended.Continue sanitary landfills operating type landfill waste routinely.
For the mountain valley-type landfill yard, continuing to cover waste layer 10 on the landfill on the surperficial water distribution layer on special-purpose garbage disposal layer 4 upper strata, when landfill waste covered to porous water distributor 8 positions, the clay 14 of water distributor 8 tops should be dug out by segmentation, excavates width and should be slightly larger than the water distributor caliber.This position will form the passage that the upper strata percolate flows downward, and make percolate obtain once distributing at this again.When percolate continued to flow downward to centre water distribution layer 5, percolate was evenly distributed once more.Can make upper strata percolate and the special-purpose garbage disposal layer 4 that has entered the stable product methanation stage at this like this, fully contact with wherein methanation flora, making organic pollution anaerobic metabolism is landfill gas, collects through gas and utilizes after well 6 is collected.The discharging after storage pond and further advanced treating are up to standard of remaining percolate.So the percolate that covers waste layer 10 generations in the continuous interpolation is continuously handled, making the pollutant metabolism of percolate is landfill gas, reaches the purpose of improving leachate quality.
Claims (2)
1, processing method in a kind of field of consumer waste landfill percolate, it is characterized in that: the first step, at the landfill yard of laying impervious barrier, lay the leachate collection layer, landfill waste on the leachate collection layer, when waste layer thickness reaches 1.5～2.0m, on this layer, cover the middle water distribution uniformity layer of one deck, middle water distribution uniformity layer is formed with building to lay after sand evenly mixes by the 1:1 volume ratio by the bird's-eye gravel of particle diameter 5～30mm, its thickness is greater than 0.2m, continue landfill waste on it after form thick another layer waste layer of 1.5～2.0m, evenly cover the compacting soil layer that 0.3m is thick at least again on another layer waste layer surface, establish the perforation water distributor on compacting soil layer upper berth, the perforation water distributor is connected to the cloth supply mains, perforation water distributor upper edge pipe range covers geotextiles, constitutes special-purpose garbage disposal layer; Leachate collection is confluxed to the percolate storage pond, again through after up flow type filter bed anaerobic bio-treated or the intermission aerobic biological treatment, make the COD content of handling water outlet be less than or equal to 3000mg/L, the pH value is more than or equal to after 7.5, to handle water outlet and be delivered to the cloth supply mains, and after oozing out, the perforation water distributor in another layer waste layer, circulates, the hydraulic load of percolate circulation is by another layer waste layer surface area, should be more than or equal to 15mm/d, began to circulate back 6 months, from gas collection well, collect gas and carry out sample analysis, when containing the methane volume ratio in the gas greater than 50% the time, waste layer has promptly reached stable product methane phase and has formed special-purpose garbage disposal layer, the circular flow that stop to carry out a biological disposal upon outside the venue this moment;
Second step, as the Anaerobic Treatment reactor, the form of pressing the mountain valley-type landfill yard thereon continued landfill waste, covered waste layer in the formation with the special-purpose garbage disposal layer of above-mentioned product methane phase; Last when covering waste layer and covering to the compacting soil layer part that covers by geotextiles, clay on it should be removed before being covered by rubbish, make cover the percolate that waste layer produces can be after the perforation water distributor distributes, infiltrate equably and be in the stable special-purpose garbage disposal layer that produces methane phase as the Anaerobic Treatment reactor, organic pollution in the percolate is effectively degraded through the anaerobic organism metabolic process, the landfill gas that metabolism produces is collected through gas and is used after well is collected, and remaining percolate is qualified discharge after the direct or further advanced treating of percolate storage pond.
2, processing method in the field of a kind of consumer waste landfill percolate according to claim 1, it is characterized in that: after the special-purpose garbage disposal layer formation as the Anaerobic Treatment reactor, remaining element is by sanitary landfills mode landfill waste layer inside, after the percolate of its generation is collected by the leachate collection layer of these unit lower floors, be delivered to the cloth supply mains by the cloth water pump, in special-purpose garbage disposal layer, recharge filtration process, leachate recirculation is during to special-purpose garbage disposal layer, and its unit are hydraulic load should be controlled at below the 30mm/d.
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| CNB2004100160793A CN100531942C (en) | 2004-02-04 | 2004-02-04 | On-spot treatment method for leachate of landfill field |
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| CNB2004100160793A CN100531942C (en) | 2004-02-04 | 2004-02-04 | On-spot treatment method for leachate of landfill field |
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| CN100531942C true CN100531942C (en) | 2009-08-26 |
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Cited By (1)
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|---|---|---|---|---|
| CN104863184A (en) * | 2015-06-16 | 2015-08-26 | 河海大学 | Landfill impervious system capable of prolonging breakdown time of leachate and manufacturing method thereof |
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| CN1785846B (en) * | 2005-10-21 | 2010-12-08 | 同济大学 | Method of proceeding percolate treatment using ventilation buring layer |
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| CN102441551B (en) * | 2011-09-13 | 2014-07-30 | 北京高能时代环境技术股份有限公司 | Garbage dumping method based on bioreactor principle |
| CN104043638B (en) * | 2014-06-23 | 2016-01-13 | 环境保护部南京环境科学研究所 | A kind of for controlling house refuse greenhouse gases CH 4the equipment of release and control method thereof |
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| CN107008723B (en) * | 2017-03-22 | 2019-12-06 | 黑龙江省城市规划勘测设计研究院 | method for treating and sealing open type refuse landfill |
| CN106947785A (en) * | 2017-05-08 | 2017-07-14 | 重庆大学 | Make organic domestic waste fast and stable and lift the landfill stabilization method of methane production |
| CN109111056A (en) * | 2018-10-12 | 2019-01-01 | 上海溪昌环境工程有限公司 | A kind of innoxious terminal processing method of mature landfill leachate |
| CN109174926A (en) * | 2018-10-31 | 2019-01-11 | 湖南新九方科技有限公司 | A kind of consumer waste filling and embedding method |
| CN110280561B (en) * | 2019-07-15 | 2021-04-13 | 三峡大学 | Centralized landfill pit for urban domestic garbage and landfill method thereof |
| CN111112275B (en) * | 2019-11-27 | 2022-05-27 | 同济大学 | Sanitary landfill covering method for domestic garbage in loess area |
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Application publication date: 20041229 Assignee: Tianjin Jianchang Environmental Protection Co.,Ltd. Assignor: Tongji University Contract record no.: 2016990000071 Denomination of invention: Treatment method for infiltration liquid in domestic refuse burying field Granted publication date: 20090826 License type: Common License Record date: 20160308 |
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