CN109985885B - Enhanced treatment system and method for bioreactor landfill - Google Patents
Enhanced treatment system and method for bioreactor landfill Download PDFInfo
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- CN109985885B CN109985885B CN201910339817.4A CN201910339817A CN109985885B CN 109985885 B CN109985885 B CN 109985885B CN 201910339817 A CN201910339817 A CN 201910339817A CN 109985885 B CN109985885 B CN 109985885B
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- 235000015097 nutrients Nutrition 0.000 claims abstract description 64
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- 238000009423 ventilation Methods 0.000 claims abstract description 39
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 239000010410 layer Substances 0.000 claims description 62
- 238000005728 strengthening Methods 0.000 claims description 15
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
- B09B1/004—Covering of dumping sites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
- B09B1/006—Shafts or wells in waste dumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/02—Gases or liquids enclosed in discarded articles, e.g. aerosol cans or cooling systems of refrigerators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
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- Engineering & Computer Science (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a reinforced treatment system and a reinforced treatment method for a bioreactor landfill, wherein the reinforced treatment system for the bioreactor landfill comprises a pile body, a covering layer is arranged at the top of the pile body, the covering layer is a low-permeability covering layer, the periphery of the pile body is covered with an impermeable layer, a ventilation unit is arranged in the pile body, the bottom end of the ventilation unit is inserted into the pile body, the top end of the ventilation unit is provided with a nutrient solution injection port, and a runner after nutrient solution injection shares an airflow channel of the ventilation unit. The technical scheme of the invention has the advantages of high degradation speed, short stabilization time, simple construction, low cost, easy maintenance and the like.
Description
Technical Field
The invention relates to the technical field of refuse landfill treatment, in particular to a bioreactor landfill strengthening treatment system and method.
Background
With the improvement of the living standard of people, the discharge amount of the household garbage is increased year by year. At present, the treatment of domestic garbage in China is still mainly sanitary landfill. The traditional method of sanitary landfill is that garbage is wrapped through the bottom of a warehouse seepage prevention and sealing field coverage, water is prevented from entering the field, the water content in the field is lower and lower, the degradation activity of microorganisms in the field is limited, the maintenance period of the landfill is prolonged, the long-term potential possibility that garbage percolate pollutes underground water is increased, and therefore, higher requirements are put forward on a bottom seepage prevention system, and the bottom seepage prevention system is more expensive in manufacturing cost. At the same time, the durability of the liner barrier system has not been demonstrated, and it has been difficult to ensure that the integrity and stability of the liner structure is maintained for a period of stability of decades.
In recent years, the problem of overlong landfill time of the bioreactor landfill site is well solved. The biological reactor landfill can increase humidity in the landfill, stimulate degradation activity of microorganisms, accelerate decomposition of organic matters, and change a passive garbage degradation process into an accelerated degradation process which can be actively controlled. Compared with the conventional refuse landfill, the bioreactor landfill has the advantages of high digestion capacity, long service life and short stabilization time, and can reach a stable state only by 6-10 years, so that the dissipation opportunity of landfill gas can be reduced, and the pollution of the landfill gas to the atmosphere is reduced. Meanwhile, the stabilization time is greatly shortened, so that maintenance cost is saved, the requirement on the durability of the lining of the seepage-proofing system at the bottom of the landfill is reduced, and construction cost is correspondingly reduced.
At present, the increase of humidity in the landfill is mainly realized by the recharging of percolate. The adoption of the filtration liquid for recharging can form pH gradient distribution in a landfill site, and the ecological balance of a microbiota in the site can be destroyed, so that the degradation speed is influenced; the dominant microbial flora in the leachate may not be consistent with the dominant microbial flora in the landfill, and may interfere with the activity of the microorganisms, thereby affecting the degradation activity of the landfill.
The percolate recharging mode mainly comprises two modes, wherein one mode is surface sprinkling irrigation, and the other mode is pipeline recharging. The sanitary condition of surface spray irrigation is poor, and the health of human body is seriously affected. The pipeline recharging is divided into a planar pipe network and a vertical shaft recharging, the planar pipe network is paved below the sealing field covering layer, the effect is good, but the design and construction are complex, and the cost is high; the vertical shaft recharging cover surface is small, uneven settlement is easy to occur, the sealing field covering anti-seepage film is likely to be pulled and torn, the anti-seepage film is invalid, meanwhile, the leachate contains impurities, the pipeline is easy to block, and the maintenance is difficult.
Disclosure of Invention
The invention aims to provide a system and a method for strengthening treatment of a bioreactor landfill, which at least solve the problems of low degradation speed, uneven sedimentation and easy blockage of pipelines of the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a landfill field strengthening treatment system for a bioreactor, comprising a stack body, wherein a cover layer is provided on the top of the stack body, the cover layer is a low permeability cover layer, an impermeable layer is coated on the periphery of the stack body, a ventilation unit is provided in the stack body, the bottom end of the ventilation unit is inserted into the stack body, a nutrient solution injection port is provided at the top end of the ventilation unit, and a flow channel after nutrient solution injection shares an airflow channel of the ventilation unit.
The covering layer has certain permeability, most of rainwater is discharged out of the landfill reservoir area along the surface of the landfill after passing through the covering layer, and the small part of rainwater uniformly enters the pile body after penetrating, so that the humidity of the landfill can be increased, and moisture necessary for a degradation process is provided for microorganisms. The nutrient solution is injected into the pile body through the nutrient solution injection port of the ventilation unit, so that moisture and nutrient substances can be provided for the degradation of microorganisms, the living environment of the microorganisms is improved, the degradation of the microorganisms is promoted, the activity of the microorganism group in the garbage pile body is improved, the degradation capacity of the microorganisms is improved, the garbage in the landfill is accelerated to degrade, the stabilization process of the landfill is accelerated, the stabilization time is shortened, and the maintenance period is shortened. Therefore, the requirements on the seepage prevention performance of the landfill seepage prevention system are lower, and the cost of the landfill seepage prevention system can be reduced. The rainwater surface infiltration mode is adopted, so that uniform distribution of humidity in a landfill site is facilitated, and uneven settlement is avoided. The nutrient solution is rich in nutrient substances, and a small amount of the nutrient solution can accelerate the degradation of the garbage in the landfill site, so that the generation of uneven sedimentation is avoided. The composition of the nutrient solution can be timely adjusted according to the change of the biodegradability of the garbage in the landfill site, so that the degradation and stabilization of the garbage in the site are accelerated. The nutrient solution has few impurities and is not easy to cause pipeline blockage. After the nutrient solution is injected into the pile body, air is injected from the ventilation unit to provide an aerobic environment, and the pile body is rich in moisture and nutrient substances in the aerobic environment, so that the degradation speed of microorganisms is greatly increased; under the action of wind force, the nutrient solution can quickly infiltrate into the pile body, the nutrient solution is distributed more uniformly in the pile body, the infiltration depth is deeper, the degradation speed of garbage can be accelerated, the coverage area of the nutrient solution is larger, and the degradation process of the whole landfill site is accelerated. The nutrient solution is prevented from accumulating in the pile body, the gap between the pile body and the ventilation unit is prevented from being blocked by the nutrient solution, and the migration and extraction of landfill gas are facilitated.
In the above-mentioned system for strengthening the landfill field of a bioreactor, preferably, the ventilation unit is a shaft, the shaft is enclosed by a wire mesh, and crushed stone is filled in the shaft. The vertical shaft is formed by enclosing broken stones by the metal wire mesh, has a firm structure, is beneficial to the rapid color penetration of nutrient solution into the pile body, and is beneficial to gas migration.
In the above-mentioned system for strengthening the landfill field of a bioreactor, preferably, a gas guiding and exhausting layer is disposed between the pile body and the covering layer, and the top end of the shaft is connected with the gas guiding and exhausting layer and does not exceed the covering layer. The broken stone is paved on the upper part of the pile body to form a gas guide and exhaust layer, the gas guide and exhaust layer has good air permeability, the migration and extraction of landfill gas in the pile body are facilitated, the vertical shaft does not exceed the covering layer, and the landfill gas is prevented from escaping into the environment.
In the above-mentioned system for increasing the field strength of a bioreactor landfill, preferably, a conduit is embedded in the shaft, a cover layer extends from the top end of the conduit and is led to the outside, and the nutrient solution inlet is directly provided on the conduit. Through the conduit, the nutrient solution can be injected into the shaft through which it permeates into the stack.
In the above-mentioned system for strengthening the field of a bioreactor landfill, preferably, a plurality of through holes are arranged on the pipe body of the pipe insertion shaft, and the distribution density of the through holes is gradually increased from top to bottom. Nutrient solution can flow into the pile body from the through hole, the through hole is considered to be both gas-filled and nutrient solution-filled, the further the through hole is from the gas guide and discharge layer, the longer the nutrient solution input stroke is, the through hole density is skillfully controlled, the gas guide is not affected, the range of the nutrient solution injection in the depth direction coverage is larger, the contacted garbage is more, the degradation process is accelerated, the nutrient solution is distributed more uniformly in the depth direction, and the utilization rate is higher.
In the above-mentioned treatment system for strengthening the landfill field of a bioreactor, preferably, the outside of the tube body of the catheterization shaft is wrapped with a permeable protective layer to prevent broken stones from blocking the through holes.
In the above-mentioned system for reinforcing the landfill site of a bioreactor, preferably, a circular-field flood-intercepting trench is provided around the cover layer. The rainwater can quickly flow into the flood intercepting ditches of the ring field, so that the rainwater is prevented from accumulating on the covering layer, and a large amount of percolate is prevented from being formed by soaking garbage with the rainwater.
In the above-mentioned landfill field intensity treatment system, preferably, the top end of the conduit is connected with a first branch pipe for exhausting gas, a second branch pipe for connecting with a nutrient solution source, and a third branch pipe connected with a blower, and the first branch pipe, the second branch pipe, and the third branch pipe are respectively provided with a first valve, a second valve, and a third valve. The air is injected into the pile body through the guide pipe, an aerobic environment is provided for the landfill, the degradation speed of garbage is accelerated, the gas in the pile body can be discharged from the guide pipe, the gas generated by the landfill is conveniently collected, the three branch pipes are arranged together, the guide pipe is fully utilized, the cost is saved, the operation is convenient, the valve is used for controlling the on-off of each branch pipe, the control is convenient, and the nutrient solution and the gas are prevented from overflowing from other branch pipes.
In the above-mentioned system for strengthening the landfill strength of a bioreactor, preferably, the cover layer comprises three layers, the upper and lower layers are geotextiles, and the middle layer is a high-density polyethylene film with a thickness of 0.25-0.5 mm. In a traditional landfill, the thickness of the high-density polyethylene film is at least 1.0mm, and the high-density polyethylene film with the thickness of 0.25-0.5 mm is adopted as the covering layer, so that part of rainwater uniformly enters the pile body through infiltration, the humidity of the landfill is increased, and moisture necessary for a degradation process is provided for microorganisms, so that the stabilization process of the landfill is accelerated. Meanwhile, the requirements on the seepage-proofing performance are lower, and the manufacturing cost of the sealing seepage-proofing system can be reduced.
The invention also provides a treatment method based on the bioreactor landfill strengthening treatment system, which comprises the following steps of:
s1: checking whether the guide pipe and the vertical shaft are unobstructed or not, and ensuring that the first valve, the second valve, the third valve and the blower are in a closed state;
s2: after the landfill is operated for a period of time, first valves of all ventilation units are opened for more than 20 hours to exhaust;
s3: after the exhaust is finished, closing the first valve, opening the second valve of each ventilation unit, and injecting nutrient solution required by the operation of the landfill into the pile body by means of the second branch pipe, so that the nutrient solution enters the pile body of the landfill through the air flow channels of each ventilation unit and the through holes on the guide pipes, and the duration is at least 20 minutes;
s4: after the addition of the nutrient solution is finished, closing the second valve, opening the third valve of each ventilation unit, and starting the blower to continuously inject air into the stack body for at least 20 minutes;
s5: after the air injection is finished, all the blowers are closed, and the third valve is closed to finish a treatment cycle;
s6: and (5) operating the landfill for a period of time, and repeating the steps S2-S5 again to finish the next processing cycle.
Compared with the prior art, the invention has the advantages that:
The covering layer has certain permeability, most of rainwater is discharged out of the landfill reservoir area along the surface of the landfill after passing through the covering layer, and the small part of rainwater uniformly enters the pile body after penetrating, so that the humidity of the landfill can be increased, and moisture necessary for a degradation process is provided for microorganisms. The nutrient solution is injected into the pile body through the nutrient solution injection port of the ventilation unit, so that moisture and nutrient substances can be provided for the degradation of microorganisms, the living environment of the microorganisms is improved, the degradation of the microorganisms is promoted, the activity of the microorganism group in the garbage pile body is improved, the degradation capacity of the microorganisms is improved, the garbage in the landfill is accelerated to degrade, the stabilization process of the landfill is accelerated, the stabilization time is shortened, and the maintenance period is shortened. Therefore, the requirements on the seepage prevention performance of the landfill seepage prevention system are lower, and the cost of the landfill seepage prevention system can be reduced. The rainwater surface infiltration mode is adopted, so that uniform distribution of humidity in a landfill site is facilitated, and uneven settlement is avoided. The nutrient solution is rich in nutrient substances, and a small amount of the nutrient solution can accelerate the degradation of the garbage in the landfill site, so that the generation of uneven sedimentation is avoided. The composition of the nutrient solution can be timely adjusted according to the change of the biodegradability of the garbage in the landfill site, so that the degradation and stabilization of the garbage in the site are accelerated. The nutrient solution has few impurities and is not easy to cause pipeline blockage. After the nutrient solution is injected into the pile body, air is injected from the ventilation unit to provide an aerobic environment, and the pile body is rich in moisture and nutrient substances in the aerobic environment, so that the degradation speed of microorganisms is greatly increased; under the action of wind force, the nutrient solution can quickly infiltrate into the pile body, the nutrient solution is distributed more uniformly in the pile body, the infiltration depth is deeper, the degradation speed of garbage can be accelerated, the coverage area of the nutrient solution is larger, and the degradation process of the whole landfill site is accelerated. The nutrient solution is prevented from accumulating in the pile body, the gap between the pile body and the ventilation unit is prevented from being blocked by the nutrient solution, and the migration and extraction of landfill gas are facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a system for enhancing treatment of a landfill of a bioreactor according to the present invention.
FIG. 2 is a schematic diagram showing a partial structure of a system for reinforcing a landfill site of a bioreactor according to the present invention.
Legend description:
1. stacking; 2. an impermeable layer; 3. a shaft; 4. a conduit; 41. a first branch pipe; 42. a second branch pipe; 43. a third branch pipe; 5. a gas guiding layer; 6. a cover layer; 7. a wire mesh; 8. a protective layer; 9. the ring field cuts off the flood ditch.
Detailed Description
The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown, for the purpose of illustrating the invention, but the scope of the invention is not limited to the specific embodiments shown.
It will be understood that when an element is referred to as being "fixed, affixed, connected, or in communication with" another element, it can be directly fixed, affixed, connected, or in communication with the other element or intervening elements may be present.
Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present invention.
Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or may be prepared by existing methods.
Examples:
As shown in fig. 1 and 2, the enhanced treatment system for a landfill of a bioreactor of this embodiment includes a stack body 1, a cover layer 6 is provided on the top of the stack body 1, the cover layer 6 is a low permeability cover layer, an impermeable layer 2 is coated on the periphery of the stack body 1, a ventilation unit is provided in the stack body 1, the bottom end of the ventilation unit is inserted into the stack body 1, a nutrient solution injection port is provided at the top end of the ventilation unit, and a runner after nutrient solution injection shares an air flow channel of the ventilation unit. The nutrient solution is prepared by mixing clear water, aerobic bacteria and degrading enzyme according to a certain proportion, and the composition of the nutrient solution can be timely adjusted according to the change of biodegradability of the garbage in the landfill site, so that the degradation and stabilization of the garbage in the site are accelerated.
In this embodiment, the ventilation unit is a shaft 3, and the shaft 3 is surrounded by a wire mesh 7, and is filled with crushed stone. Specifically, the wire mesh 7 is a wire mesh, and the vertical shaft 3 is filled with crushed stones with phi 25-50 mm.
In this embodiment, a gas guiding and exhausting layer 5 is arranged between the pile body 1 and the covering layer 6, and the top end of the vertical shaft 3 is connected with the gas guiding and exhausting layer 5 and does not exceed the covering layer 6.
In this embodiment, a conduit 4 is embedded in the shaft 3, the top end of the conduit 4 extends out of the cover layer 6 and is led to the outside, and the nutrient solution injection port is directly arranged on the conduit 4. In particular, the conduit 4 is made of a high density polyethylene material.
In this embodiment, a plurality of through holes are arranged on the pipe body of the guide pipe 4 inserted into the vertical shaft 3, and the distribution density of the through holes is gradually increased from top to bottom.
In this embodiment, the outside of the tube body of the insertion shaft 3 of the guide tube 4 is covered with a protective layer 8 having permeability. Specifically, the protective layer 8 is 300g/m geotextile.
In this embodiment, the surrounding of the cover layer 6 is provided with a circular field flood interception ditch 9.
In this embodiment, the top end of the conduit 4 is connected with a first branch pipe 41 for exhausting gas, a second branch pipe 42 for connecting with a nutrient solution source, and a third branch pipe 43 connected with a blower, and the first, second, and third branch pipes 41, 42, and 43 are respectively provided with a first valve, a second valve, and a third valve.
In this embodiment, the cover layer 6 comprises three layers, the upper and lower layers are geotextiles, and the middle layer is a high-density polyethylene film with the thickness of 0.25-0.5 mm.
The treatment method of the enhanced treatment system of the bioreactor landfill in the embodiment is as follows:
S1: checking whether the guide pipe 4 and the vertical shaft 3 are unobstructed or not, and ensuring that the first valve, the second valve, the third valve and the blower are in a closed state;
s2: after the landfill is operated for a period of time, first valves of all ventilation units are opened for more than 20 hours to exhaust;
S3: after the exhaust is finished, the first valve is closed, the second valve of each ventilation unit is opened, and nutrient solution required by the operation of the landfill site is injected into the pile body 1 by means of the second branch pipe 42, so that the nutrient solution enters the pile body 1 of the landfill site through the airflow channels of each ventilation unit and the through holes on the guide pipe 4 for at least 20 minutes;
s4: after the addition of the nutrient solution is finished, closing the second valve, opening the third valve of each ventilation unit, and starting the blower to continuously inject air into the stack body 1 for at least 20 minutes;
s5: after the air injection is finished, all the blowers are closed, and the third valve is closed to finish a treatment cycle;
s6: and (5) operating the landfill for a period of time, and repeating the steps S2-S5 again to finish the next processing cycle.
The above description is merely a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above examples. Modifications and variations which would be obvious to those skilled in the art without departing from the spirit of the invention are also considered to be within the scope of the invention.
Claims (5)
1. A bioreactor landfill field intensity treatment system is characterized in that: the anti-seepage device comprises a pile body (1), wherein a cover layer (6) is arranged at the top of the pile body (1), the cover layer (6) is a low-permeability cover layer, an impermeable layer (2) is coated on the periphery of the pile body (1), a ventilation unit is arranged in the pile body (1), the bottom end of the ventilation unit is inserted into the pile body (1), a nutrient solution injection port is arranged at the top end of the ventilation unit, and a runner after nutrient solution injection shares an airflow channel of the ventilation unit;
The ventilation unit is a vertical shaft (3), the vertical shaft (3) is formed by enclosing a wire mesh (7), and broken stone is filled in the vertical shaft; a guide pipe (4) is embedded in the vertical shaft (3), a covering layer (6) extends out of the top end of the guide pipe (4) and is led to the outside, and the nutrient solution injection port is directly arranged on the guide pipe (4); the guide pipe (4) is inserted into the pipe body of the vertical shaft (3) and is provided with a plurality of through holes, the through holes are paved into the pile body (6) from the gas guide and discharge layer (5), and the distribution density of the through holes is gradually increased from top to bottom; a gas guide and exhaust layer (5) is arranged between the pile body (1) and the covering layer (6), and the top end of the vertical shaft (3) is connected with the gas guide and exhaust layer (5) and does not exceed the covering layer (6);
The top of pipe (4) is connected with first branch pipe (41) that are used for the exhaust gas, is used for second branch pipe (42) that link to each other with the nutrient solution source and third branch pipe (43) that link to each other with the air-blower, be equipped with first valve, second valve and third valve on first branch pipe (41), second branch pipe (42) and the third branch pipe (43) respectively, the air-blower is used for to the internal injection air of heap.
2. The bioreactor landfill strengthening treatment system as set forth in claim 1, wherein: the pipe body of the guide pipe (4) inserted into the vertical shaft (3) is wrapped with a permeable protective layer (8).
3. The bioreactor landfill strengthening treatment system as set forth in claim 1, wherein: and annular field flood intercepting ditches (9) are arranged around the covering layer (6).
4. A bioreactor landfill strengthening treatment system as claimed in any one of claims 1 to 3, wherein: the covering layer (6) comprises three layers, wherein the upper layer and the lower layer are geotextiles, and the middle layer is a high-density polyethylene film with the thickness of 0.25-0.5 mm.
5. A treatment method of a bioreactor landfill field strengthening treatment system, the bioreactor landfill field strengthening treatment system comprises a pile body (1), an impermeable layer (2) is arranged on the periphery of the pile body (1), a low-permeability covering layer (6) is arranged on the top of the pile body (1), a gas guide and discharge layer (5) is arranged between the pile body (1) and the covering layer (6), a plurality of ventilation units are arranged in the pile body (1), each ventilation unit comprises a vertical shaft (3), a conduit (4) is embedded in the vertical shaft (3), a first branch pipe (41) for discharging gas, a second branch pipe (42) for connecting with a nutrient solution source and a third branch pipe (43) connected with a blower are connected to the top of the conduit (4), and a first valve, a second valve and a third valve are respectively arranged on the first branch pipe (41), the second branch pipe (42) and the third branch pipe (43), the treatment method is characterized in that the bioreactor landfill field strengthening treatment system is completed by adopting any one of claims 1 to 4, and comprises the following steps:
s1: checking whether the guide pipe (4) and the vertical shaft (3) are unobstructed or not, and ensuring that the first valve, the second valve, the third valve and the blower are in a closed state;
s2: after the landfill is operated for a period of time, first valves of all ventilation units are opened for more than 20 hours to exhaust;
s3: after the exhaust is finished, the first valve is closed, the second valve of each ventilation unit is opened, and nutrient solution required by the operation of the landfill site is injected into the pile body (1) by means of the second branch pipe (42), so that the nutrient solution enters the pile body (1) of the landfill site through the airflow channels of each ventilation unit and the through holes on the guide pipe (4) for at least 20 minutes;
S4: after the addition of the nutrient solution is finished, closing the second valve, opening the third valve of each ventilation unit, and starting the blower to continuously inject air into the stack body (1) for at least 20 minutes;
s5: after the air injection is finished, all the blowers are closed, and the third valve is closed to finish a treatment cycle;
s6: and (5) operating the landfill for a period of time, and repeating the steps S2-S5 again to finish the next processing cycle.
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