CN110066022A - A kind of landfill percolate recirculation process - Google Patents
A kind of landfill percolate recirculation process Download PDFInfo
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- CN110066022A CN110066022A CN201910378201.8A CN201910378201A CN110066022A CN 110066022 A CN110066022 A CN 110066022A CN 201910378201 A CN201910378201 A CN 201910378201A CN 110066022 A CN110066022 A CN 110066022A
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- leachate
- percolate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
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Abstract
The present invention discloses a kind of landfill percolate recirculation process, and include the following steps: (1) leachate collection: percolate is delivered to the french drain by the perfusion tube, then is delivered to the leachate equalization basin by the percolate delivery pipe；(2) leachate pretreatment: the facultative bacteria preparation of microorganism is added to percolate and is pre-processed；(3) subregion: landfill yard is divided by landfill area according to methane content, has filled area and area to be filled；(4) leachate recirculation: percolate is distinguished into recharge to the landfill area and described has filled area.Different strains can inhibit the growth of all kinds of pathogens of landfill yard and virus in the facultative bacteria preparation of microorganism, can also improve the yield of biogas；To landfill area and area's progress leachate recirculation has been filled, has accelerated leachate recirculation process using landfill area and the biological effect for having filled area, further increases the biogas output value；Marsh gas treating system is used to the collecting methane of landfill yard output, and the availability of resource improves.
Description
Technical field
The present invention relates to recharging technique field more particularly to a kind of landfill percolate recirculation process.
Background technique
With the acceleration of continuous improvement of people's living standards and urbanization process, the yield of municipal refuse is constantly climbed
It rises, municipal refuse is just increased with annual 8%~10% speed at present, compared with the processing method of waste incineration and compost, health
Landfill method has many advantages, such as at low cost, technology maturation, convenient for management, it has also become most widely used rubbish processing to be harmless side
Method, and pollution stronger landfill leachate can be generated during garbage sanitary filling, all to ecological environment and human health
There are biggish harm.Therefore, the contamination control of percolate is a landfill yard critical issue to be treated.
Existing percolate processing generallys use recirculation process, and difficulty is larger by the way of leachate recirculation, due to
In junk-heap body there are gas can not natural outlet, liquid can not normal osmosis to junk-heap body bottom end, the percolate meeting of recharge
Therefore it cannot be introduced into junk-heap body, recharge effect is undesirable；And it can be along the outer of junk-heap body when leachate recirculation
Surface or shallow-layer are left to slope foot, and the cover film of junk-heap body slope foot is caused to suffer erosion and rupture.Meanwhile in garbage decomposition process
Middle to generate more biogas, generated biogas is received in existing refuse landfill only by primary filtration system
Collection, does not carry out purified treatment to it and is improved to biogas output.
Summary of the invention
The main object of the present invention is to propose a kind of landfill percolate recirculation process, it is intended to solve existing landfill yard recharge
Technique recharge effect is undesirable, percolate destroys junk-heap body cover film and is not mentioned to methane quantity caused by junk-heap body
High technical problem.
To achieve the above object, the present invention proposes a kind of landfill percolate recirculation process, includes the following steps:
(1) leachate collection: it is equipped with a plurality of french drain in the Basolateral of junk-heap body, is set in the inside of the junk-heap body
There is a plurality of perfusion tube, the perfusion tube is connected with the french drain, and the french drain is adjusted by percolate delivery pipe and percolate
Pond is connected, and percolate is delivered to the french drain by the perfusion tube, then is delivered to by the percolate delivery pipe described
Leachate equalization basin；
(2) leachate pretreatment: by the facultative bacteria preparation of microorganism be added to the percolate in the leachate equalization basin into
Row pretreatment；
(3) subregion: setting biogas detection device measures the content of biogas, and landfill yard is divided into landfill according to methane content
Area has filled area and area to be filled, and the biogas measured value in the landfill area is 23~65m3/ h, the biogas for having filled area are surveyed
Magnitude is 66~180m3/ h, the biogas measured value in the area to be filled are 10~22m3/h；
(4) leachate recirculation: a plurality of leachate recirculation pipe is set by percolate and distinguishes recharge to the landfill area and described
Area is filled, one end of the leachate recirculation pipe is connect with the leachate equalization basin, and the other end is laid in junk-heap body.
Preferably, the facultative bacteria preparation of the microorganism include bacillus, saccharomycete, nitrobacteria, in yellow mould extremely
Few one kind.
It preferably, further include multiple marsh gas treating systems, the marsh gas treating system is by gas well, biogas exhaust pipe and gas
Processing unit composition, the gas well are arranged through the junk-heap body, and the biogas exhaust pipe layering is laid on the rubbish heap
The inside of body, one end of the gas well are connected with the biogas exhaust pipe, and the other end is connected with the gas treatment equipment
It is logical.
Preferably, device includes filter, desulfurizer and cooling device at the gas.
Preferably, the leachate recirculation pipe includes leachate recirculation supervisor and leachate recirculation branch pipe, the percolate
Around the outer for being laid on the junk-heap body, the leachate recirculation branch pipe is arranged in the junk-heap body recharge supervisor
Interbed, the leachate recirculation supervisor are connected with the leachate recirculation branch pipe.
Preferably, the leachate recirculation pipe is equipped with autocontrol valve, and the autocontrol valve and the biogas are examined
Survey device electrical connection.
Preferably, the edge of the french drain is provided with TGXG, and the TGXG has mesh-structured, the mesh
Lateral dimension be 30~50mm, the longitudinal size of the mesh is 40~55mm.
Preferably, the bottom end of the french drain is provided with antiseepage film.
Landfill percolate recirculation process of the invention, has the following beneficial effects:
1. addition microorganism facultative bacteria preparation percolate is pre-processed, different strain respectively to percolate at
Reason, recharge can inhibit the growth of all kinds of pathogens of landfill yard and virus into junk-heap body, and the decomposition rate of rubbish is accelerated also
The yield of biogas can be improved；
2. landfill yard is divided into landfill area by the size of biogas measured value, has filled area and area to be filled, to landfill area
The recharge that area carries out percolate is filled, area to be filled using landfill area and has filled the biological effect in area without recharge
Accelerate the process of leachate recirculation, and the output value of biogas can also be further increased；
3. the biogas of landfill yard output is collected and post-processes and is used by the setting of marsh gas treating system,
The availability of Methane Resources improves.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the schematic diagram of one embodiment of landfill percolate recirculation process of the present invention；
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 1 | Fill area | 2 | Area is filled |
| 3 | Area to be filled | 4 | Leachate recirculation supervisor |
| 5 | Leachate recirculation branch pipe |
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention,
Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship,
Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.In addition, each
Technical solution between embodiment can be combined with each other, but must can be implemented as base with those of ordinary skill in the art
Plinth will be understood that the combination of this technical solution is not present when conflicting or cannot achieve when occurs in the combination of technical solution,
Also not the present invention claims protection scope within.
The present invention proposes a kind of landfill percolate recirculation process, and landfill percolate recirculation process is for inside landfill yard
The recharge of percolate.
In an embodiment of the present invention, as shown in Figure 1, a kind of landfill percolate recirculation process, includes the following steps:
(1) leachate collection: the Basolateral of junk-heap body is provided with a plurality of french drain, in the inside of the junk-heap body
It is provided with a plurality of perfusion tube, the perfusion tube is connected with the french drain, and the french drain passes through percolate delivery pipe and percolate
Conditioning tank is connected, and percolate is delivered to the french drain by the perfusion tube, then is delivered to by the percolate delivery pipe
The leachate equalization basin；
(2) leachate pretreatment: by the facultative bacteria preparation of microorganism be added to the percolate in the leachate equalization basin into
Row pretreatment；
(3) subregion: setting biogas detection device measures the content of biogas, and landfill yard is divided into landfill area according to methane content
1, area 2 and area to be filled 3 have been filled, the biogas measured value in the landfill area 1 is 23~65m3/ h, the natural pond for having filled area 2
Gas measured value is 66~180m3/ h, the biogas measured value in the area 3 to be filled are 10~22m3/h；
(4) leachate recirculation: a plurality of leachate recirculation pipe is set by percolate and distinguishes recharge to the landfill area and described
Area is filled, one end of the leachate recirculation pipe is connect with the leachate equalization basin, and the other end is laid in junk-heap body.
Specifically, being equipped with french drain in the Basolateral position of junk-heap body, french drain is mainly used for percolate in the present embodiment
Guide, with preferable water delivery and drainability, and the stability of junk-heap body can be reinforced.Specifically, in rubbish
French drain is excavated in the extension side slope direction of heap body, and the length of every french drain is 10-12m, and the width of bottom is 1.5-1.8m, upper bottom
Width is 2-2.4m, and the height of french drain is 1-1.2m, wherein between the end of first french drain and the head end of Article 2 french drain
Spacing is 10-15m, and so on.In conjunction with the swabbing action of pump, percolate is exported by perfusion tube to french drain, final to convey
To leachate equalization basin, the facultative bacteria preparation of microorganism is added in leachate equalization basin and is pre-processed into percolate, due to
Storage has more rubbish in landfill yard, and junk-heap body is after overcompaction and fermentation, under the collective effect of rainwater and underground water
The high concentration percolate of generation, containing more toxic inorganic matter and organic matter, and in the facultative bacteria preparation of microorganism added
There is different strains, it is possible to reduce murder by poisoning ingredient and foul smell in percolate distribute, and inhibit all kinds of cause of diseases inside landfill yard
The growth of bacterium and virus, and when leachate recirculation to junk-heap body, the facultative bacteria preparation of microorganism may also speed up junk-heap body
In substance decomposition, promote the generation of biogas.
As shown in Figure 1, the measurement of biogas is carried out by biogas measuring device in the inside of landfill yard rubbish, further according to biogas
Landfill yard is divided into landfill area 1, has filled area 2 and area to be filled 3 by the size of measured value.Fill the biogas measured value model in area 1
It encloses for 23~65m3/ h, this region constantly have new garbage loading embeading and come in, and wherein the organic matter of rubbish is more, and strain is to having
Machine object is decomposed and generates biogas；The biogas measured value for having filled area 2 is 66~180m3/ h, the not new rubbish in this region
Rubbish landfill is come in, and garbage loading embeading amount is in a saturated state, the growth and breeding of relatively stable suitable strain, is decomposed in junk-heap body
Most of organic matter generates biogas, and the content of biogas is most；The biogas measured value in area 3 to be filled is 10~22m3/ h, this area
The garbage loading embeading amount in domain is less, and inorganic substances are also less, therefore the biogas generated is less.
A plurality of leachate recirculation pipe is laid on inside junk-heap body, the other end and leachate equalization basin of leachate recirculation pipe
Connection, according to the recharge of the progress percolate of the size selectivity of biogas measured value: it fills area 1 and has filled the progress recharge of area 2,
Area to be filled 3 is without recharge.Wherein, fill area 1 and filled area 2 junk-heap body it is more, to the degradation of percolate
Preferably, percolate of the recharge into the two regions can achieve preferable degradation effect；And leachate recirculation is to rubbish heap
After body, the moisture content in junk-heap body can be improved, increase the activity of its humidity and microorganism, accelerate the decomposition of wherein organic matter
Rate, to improve landfill area 1 and fill the biogas output in area 2.Area 3 to be filled is without recharge, because of area to be filled 3
Junk-heap body is less, ideal effect is not achieved to the degradation of percolate, therefore without recharge.
Specifically, the facultative bacteria preparation of microorganism include bacillus, saccharomycete, nitrobacteria, in yellow mould extremely
Few one kind.Bacillus in the facultative bacteria preparation of microorganism has nontoxicity, being capable of a variety of enzymes and the antibiosis such as extracellular proteinase
Element, inhibits the growth of other bacteriums using it, and then reduces and remove all kinds of germs and pathogen in refuse landfill.Yeast
Bacterium can survive under aerobic and oxygen free condition as a kind of typical heterotrophism amphimicrobe, be a kind of natural hair
Ferment agent accelerates the continuous decomposition of organic matter in garbage, the rubbish inside landfill yard is avoided constantly to accumulate.Nitrobacteria can be with it
His strain combination decomposing organic matter purifies the noxious material in rubbish, can also adsorb some particles after being gathered into flora.It is yellow mould
Bacterium can promote the decomposition of starch and the growth of cellulose family microorganism, and the cellulose decomposition speed in rubbish is made to improve 15%.
Further, the leachate recirculation process further includes multiple marsh gas treating systems, the marsh gas treating system by
Gas well, biogas exhaust pipe and gas handling system composition, the gas well run through the junk-heap body, the biogas exhaust pipe layering
It is laid on the inside of the junk-heap body, the biogas exhaust pipe is connected with the gas well, gas treatment described in the gas well
Device is connected.
Specifically, the biogas that the setting of marsh gas treating system can generate refuse landfill inside is collected and is subject to
It utilizes, but also the large quantity of moisture in junk-heap body can be taken away, reach the minimizing of percolate.Marsh gas treating system is by gas
Well, biogas exhaust pipe and gas handling system composition, gas well run through the buring layer of entire junk-heap body, are mainly used for the remittance of biogas
Collection, wherein the layering of biogas exhaust pipe is laid on the inside of junk-heap body, and cooperation pump machine is aspirated, thus what junk-heap body generated
Biogas can be collected in gas well by biogas exhaust pipe, then be fed directly to gas treatment equipment by gas well.
Further, device includes filter, desulfurizer and cooling device at the gas.Gas treatment equipment is main
Including filter, desulfurizer and cooling device.The biogas pumped out from junk-heap body, passes through inside junk-heap body
, can be containing a large amount of aqueous vapor, dust impurities and sulfiding gas etc. after temperature or hot fermentation, filter mainly carried out biogas
Filter processing, removes the solid dirt and impurity in biogas, reduces the burden of next step methane-desulfurizing device and carries out to biogas
Preliminary purification.Sulfiding gas can cause to corrode to the metal parts in collecting methane system, so that line clogging is caused, at gas
The service life of reason system is shorter, and sulfiding gas can also pollute atmospheric environment；And desulfurizer can filter natural pond
Sulfiding gas in gas, sulfiding gas of the biogas after filter preliminary hydro-extraction dedusting, into desulfurizer removal biogas.
And the effect of cooling device is then the most of moisture removed in biogas, avoids the liquid impurity ingredient in biogas excessive, causes
Subsequent purification process burden is excessive, or even the possibility of mechanical disorder occurs.
Further, the leachate recirculation pipe includes leachate recirculation supervisor 4 and leachate recirculation branch pipe 5, the infiltration
Filtrate recharge supervisor 4 is arranged around the outer for being laid on the junk-heap body, the leachate recirculation branch pipe 5 in the rubbish heap
The middle layer of body, the leachate recirculation supervisor 4 are connected with the leachate recirculation branch pipe 5.Leachate recirculation pipe is divided into
The setting of leachate recirculation supervisor 4 and leachate recirculation branch pipe 5, mainly play the role of better recharge to percolate.Diafiltration
The diameter of liquid recharge supervisor 4 is greater than leachate recirculation branch pipe 5, and leachate recirculation supervisor 4 sets around the outer of junk-heap body
It sets, for by the surface layer of a large amount of leachate recirculation to junk-heap body, percolate to penetrate into inside by surface layer, utilizes soil and rubbish
The degradation of heap body carries out purified treatment to percolate.And the leachate recirculation branch pipe 5 of junk-heap body middle layer is set, mouth
Diameter and flow are smaller, for the inside of transport portion percolate to junk-heap body, increase junk-heap body to the processing energy of percolate
Power improves the recharge efficiency of percolate.
Specifically, the leachate recirculation pipe is equipped with autocontrol valve, and the autocontrol valve and the biogas are examined
Survey device electrical connection.Autocontrol valve is arranged in leachate recirculation pipe, and autocontrol valve is electrically connected with biogas detection device, when
The biogas value range of biogas detection device measurement is in 66~180m3When/h, autocontrol valve is opened, and leachate recirculation is to filling out
Buried district 1 and area 2 is filled, and biogas value range is in 10~22m3When/h, autocontrol valve is closed, and controls area 3 to be filled
Recharge without percolate is handled.
Further, the edge of the french drain is provided with TGXG, and the TGXG has mesh-structured, the net
The lateral dimension in hole is 30~50mm, and the longitudinal size of the mesh is 40~55mm.
Specifically, the edge of french drain is encapsulated using direction earthwork grille, for improving the bearing capacity of junk-heap body, is subtracted
The problem of settling less, preventing the sedimentation due to junk-heap body from french drain being caused to be broken, and junk-heap body can be further strengthened
Stability reduces garbage loading embeading land used.TGXG have it is distinctive mesh-structured, improve stability ability mainly show
For the interlocking power and build-in force of grid mesh, under the action of load, a kind of similar confining pressure is produced to junk-heap body
Effect, makes junk-heap body shearing strength with higher and deformation modulus；Meanwhile the TGXG of high elastic modulus is after stress
Vertical stress will be generated, offsets fractional load, when junk-heap body is there may be when failure by shear, TGXG will prevent failure mechanics
Appearance.The lateral dimension of mesh is 30~50mm, and when longitudinal size is 40~55mm, the mesh between TGXG is due to knot
The presence of resultant force constrains the transverse shifting of junk-heap body, forms good interlock action, has junk-heap body preferable
Integral anti-shearing ability；And also there is certain rigidity spread load above, improve the bearing capacity of junk-heap body.
When oversized, rubbish is easy to drop out from TGXG, influences the stability of junk-heap body.
Specifically, the bottom end of the french drain is provided with antiseepage film.The bottom end of french drain is provided with antiseepage film, can be exposed in ring
It is directly used in border, antiseepage coefficient is higher, for preventing diafiltration liquid stream from penetrating into inside junk-heap body from french drain again, has excellent
Physical and chemical performance, with good mechanical strength it is excellent elasticity and deformability so that it is highly suitable for expansion or shrinkage base
Face can effectively overcome the differential settlement of basal plane, corrosion-resistant, and temperature change influences the performance of antiseepage film smaller in environment.It is excellent
HDPE antiseepage film is selected, with excellent anti-aging, uvioresistant, antidecomposition ability and preferable puncture resistant ability, actual
Service life is longer in use process.
The above description is only a preferred embodiment of the present invention, is not intended to limit scope of patent protection of the invention, all categories
Technical solution under present inventive concept, using equivalent structure transformation made by present specification, or directly/transport indirectly
Scope of patent protection of the invention is included in used in other related technical areas.It is noted that for the art
For those of ordinary skill, improvements and modifications without departing from the principle of the present invention, these improvements and modifications should also be regarded
For protection scope of the present invention.
Claims (8)
1. a kind of landfill percolate recirculation process, which comprises the steps of:
(1) leachate collection: it is equipped with a plurality of french drain in the Basolateral of junk-heap body, is equipped in the inside of the junk-heap body more
Perfusion tube, the perfusion tube are connected with the french drain, and the french drain passes through percolate delivery pipe and leachate equalization basin phase
Connection, percolate is delivered to the french drain by the perfusion tube, then is delivered to the diafiltration by the percolate delivery pipe
Liquid conditioning tank；
(2) leachate pretreatment: the facultative bacteria preparation of microorganism is added to the percolate in the leachate equalization basin and is carried out in advance
Processing；
(3) subregion: setting biogas detection device measures the content of biogas, and landfill yard is divided into landfill area, according to methane content
Area and area to be filled are filled, the biogas measured value in the landfill area is 23~65m3/ h, the biogas measured value for having filled area
For 66~180m3/ h, the biogas measured value in the area to be filled are 10~22m3/h；
(4) leachate recirculation: a plurality of leachate recirculation pipe is arranged, and by percolate, recharge to the landfill area and described has been filled out respectively
One end of buried district, the leachate recirculation pipe is connect with the leachate equalization basin, and the other end is laid in junk-heap body.
2. landfill percolate recirculation process according to claim 1, which is characterized in that the facultative bacteria preparation of microorganism
Including at least one of bacillus, saccharomycete, nitrobacteria, yellow mould.
3. landfill percolate recirculation process according to claim 1, which is characterized in that further include multiple biogas treatment systems
System, the marsh gas treating system are made of gas well, biogas exhaust pipe and gas treatment equipment, and the gas well runs through the rubbish heap
Body setting, the biogas exhaust pipe layering are laid on the inside of the junk-heap body, and one end of the gas well and the biogas are taken out
Comb is connected, and the other end is connected with the gas treatment equipment.
4. landfill percolate recirculation process according to claim 3, which is characterized in that device included at the gas
Filter, desulfurizer and cooling device.
5. landfill percolate recirculation process according to claim 1, which is characterized in that the leachate recirculation pipe includes
Leachate recirculation supervisor and leachate recirculation branch pipe, the leachate recirculation supervisor, which surround, is laid on the outer of the junk-heap body
The middle layer of the junk-heap body, the leachate recirculation supervisor and the diafiltration is arranged in edge, the leachate recirculation branch pipe
Liquid recharge branch pipe is connected.
6. landfill percolate recirculation process according to claim 5, which is characterized in that the leachate recirculation pipe is equipped with
Autocontrol valve, the autocontrol valve are electrically connected with the biogas detection device.
7. landfill percolate recirculation process according to claim 1, which is characterized in that the edge of the french drain is provided with
TGXG, the TGXG have mesh-structured, and the lateral dimension of the mesh is 30~50mm, the longitudinal direction of the mesh
Having a size of 40~55mm.
8. landfill percolate recirculation process according to claim 7, which is characterized in that the bottom end of the french drain is provided with
Antiseepage film.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114833180A (en) * | 2022-04-25 | 2022-08-02 | 深圳市同创环保科技有限公司 | Process for deodorizing household garbage, increasing methane yield and accelerating garbage degradation |
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