CN209953474U - Bioreactor landfill field intensity treatment system - Google Patents
Bioreactor landfill field intensity treatment system Download PDFInfo
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- CN209953474U CN209953474U CN201920578236.1U CN201920578236U CN209953474U CN 209953474 U CN209953474 U CN 209953474U CN 201920578236 U CN201920578236 U CN 201920578236U CN 209953474 U CN209953474 U CN 209953474U
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Abstract
The utility model discloses a bioreactor landfill field intensity processing system, this bioreactor landfill field strengthen processing system include the heap body, and heap body top is equipped with the overburden, and the overburden is the low permeability overburden, and the peripheral cladding of heap body has the barrier layer, is equipped with the ventilation unit in the heap body, and in the heap was inserted to the bottom of ventilation unit, the top of ventilation unit was equipped with nutrient solution inlet, the runner sharing after the nutrient solution injected into the airflow channel of ventilation unit. The technical scheme of the utility model have that degradation speed is fast, stabilization time is short, the construction is simple, with low costs, advantage such as easy maintenance.
Description
Technical Field
The utility model relates to a refuse landfill administers technical field, concretely relates to bioreactor landfill field intensity processing system.
Background
Along with the improvement of living standard of people, the discharge amount of domestic garbage also increases year by year. At present, domestic garbage treatment in China is mainly sanitary landfill. The traditional method of sanitary landfill is to wrap garbage through reservoir bottom seepage prevention and field sealing covering to prevent water from entering a 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, and the long-term potential possibility that the landfill leachate pollutes underground water is increased, so that 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, making it difficult to ensure that the integrity and stability of the liner structure is maintained over a stabilization period of several decades.
The bioreactor landfill site appeared in recent years well solves the problem of overlong landfill time. The bioreactor landfill can increase the humidity in the landfill, stimulate the degradation activity of microorganisms, accelerate the decomposition of organic matters, and change the passive garbage degradation process into an actively controlled accelerated degradation process. Compared with the conventional garbage sanitary landfill, the bioreactor landfill has high absorption capacity, long service life and short stabilization time, and can reach a stable state only in 6-10 years, so that the dissipation chance of landfill gas can be reduced, and the pollution of the landfill gas to the atmosphere can be reduced. Meanwhile, the stabilization time is greatly shortened, so that the maintenance cost is saved, the requirement on the durability of the lining of the anti-seepage system at the bottom of the landfill is lowered, and the construction cost is correspondingly lowered.
Increasing the humidity in landfill sites is currently mainly achieved by leachate recirculation. Leachate recirculation can form pH gradient distribution in a landfill, which can destroy the ecological balance of microbial communities in the landfill, thereby affecting the degradation speed; the dominant microbial flora in the leachate may not be consistent with the dominant microbial flora in the landfill, which will interfere with the activity of the microorganisms and thus affect the degradation activity of the landfill.
The percolate recharging method mainly comprises two modes, one mode is surface sprinkling irrigation, and the other mode is recharging through a pipeline. The surface spray irrigation has poor sanitation condition and seriously affects the human health. The pipeline recharge is divided into plane pipe network and vertical shaft recharge, the plane pipe network is laid under the sealing covering layer, the effect is better, but the design and construction are complex, and the cost is high; the vertical shaft recharging covering surface is small, uneven settlement is easy to occur, the sealing covering impermeable membrane is possibly pulled and torn, the impermeable membrane is caused to lose efficacy, and meanwhile, the leachate contains impurities, so that the pipeline is easy to block and is not easy to maintain.
SUMMERY OF THE UTILITY MODEL
The main object of the utility model is to provide a bioreactor landfill field intensity processing system to at least, solve the bioreactor landfill field degradation speed among the prior art slow, cause the easy problem of blockking up of inhomogeneous settlement, pipeline easily.
In order to realize the above object, according to the utility model discloses an aspect provides a bioreactor landfill field intensity processing system, including the heap body, the heap body top is equipped with the overburden, the overburden is the low permeability overburden, the peripheral cladding of heap body has the barrier layer, be equipped with ventilation unit in the heap body, in the heap is inserted to ventilation unit's bottom, ventilation unit's top is equipped with nutrient solution and annotates the mouth, the runner sharing after the nutrient solution pours into ventilation unit's airflow channel.
The covering layer has certain permeability, most of rainwater is discharged out of the landfill reservoir area along the surface of the refuse landfill after passing through the covering layer, and a small part of rainwater uniformly enters the pile body after permeating, so that the humidity of the landfill can be increased, and the necessary moisture for the degradation process is provided for microorganisms. Nutrient solution is injected into the pile body through the nutrient solution injection port of the ventilation unit, 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 microorganism groups in the garbage pile body is improved, the degradation capability of the microorganisms is improved, the accelerated degradation of garbage in a landfill site is realized, the stabilization process of the landfill site is accelerated, the stabilization time is shortened, and the maintenance period is shortened. Therefore, the anti-seepage performance requirement on the anti-seepage system of the landfill site is lower, and the manufacturing cost of the anti-seepage system of the landfill site can be reduced. And a rainwater surface infiltration mode is adopted, so that the uniform distribution of the humidity of the landfill is facilitated, and the generation of non-uniform settlement is avoided. The nutrient solution is rich in nutrient substances, and the garbage in the landfill can be degraded at an accelerated speed by adding a small amount of nutrient solution, so that the generation of uneven settlement is avoided. The composition of the nutrient solution can be adjusted in due time according to the change of the biodegradability of the garbage in the landfill, and the degradation and stabilization of the garbage in the landfill are accelerated. The nutrient solution has less 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 under the aerobic environment, the pile body is rich in moisture and nutrient substances, so that the degradation speed of microorganisms is greatly accelerated; under the action of wind power, the nutrient solution can rapidly permeate into the pile body, the nutrient solution is more uniformly distributed in the pile body, the permeating 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 the extraction of landfill gas are facilitated.
In the above bioreactor landfill site enhanced treatment system, preferably, the ventilation unit is a vertical shaft, the vertical shaft is formed by enclosing a wire mesh, and crushed stones are filled in the vertical shaft. The vertical shaft is formed by enclosing the broken stones through the wire mesh, has a firm structure, is beneficial to rapid color permeation of nutrient solution into the pile body, and is beneficial to gas migration.
In the above-mentioned enhanced treatment system for a bioreactor landfill site, preferably, a gas guiding and exhausting layer is provided 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 upper part of the pile body is paved with gravels to form a gas guide and exhaust layer, the gas guide and exhaust layer has good air permeability, is beneficial to the migration and extraction of landfill gas in the pile body, and the vertical shaft does not exceed the covering layer, thereby preventing the landfill gas from escaping into the environment.
In the above bioreactor landfill site enhanced treatment system, preferably, the vertical shaft is embedded with a conduit, the top end of the conduit extends out of the covering layer and is communicated with the outside, and the nutrient solution injection port is directly arranged on the conduit. Through the guide pipe, nutrient solution can be injected into the vertical shaft, and the nutrient solution permeates into the pile body through the vertical shaft.
In the above-mentioned bioreactor landfill site enhanced treatment system, preferably, the pipe body of the conduit insertion shaft is provided with a plurality of through holes, and the distribution density of the through holes is gradually increased from top to bottom. In the through-hole inflow heap can be followed to the nutrient solution, consider that this through-hole both leads to gas, lead to the nutrient solution again, and down more far away from gas drainage guide layer, and the nutrient solution input stroke is longer, through carrying out ingenious control to through-hole density, not only can not influence the air guide, can make the injection of nutrient solution bigger in the scope that the depth direction covered moreover, the rubbish of contact is more for the degradation process, the nutrient solution is more even in the depth direction distribution, and the utilization ratio is higher.
In the above bioreactor landfill strengthening treatment system, preferably, the pipe body of the conduit insertion shaft is wrapped with a permeable protective layer to prevent the through hole from being blocked by the broken stones.
In the above-mentioned enhanced treatment system for a bioreactor landfill site, preferably, a ring flood interception ditch is provided around the covering layer. Rainwater can flow into the ring field fast and cut the flood ditch, prevents that the rainwater from gathering at the overburden, avoids rainwater to soak rubbish and forms a large amount of filtration liquid.
In the above-mentioned bioreactor landfill site enhanced treatment system, preferably, the top end of the conduit is connected with a first branch pipe for discharging 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. Through the pipe with the injection of air in the heap in vivo, for the landfill provides good oxygen environment for the degradation speed of rubbish, the gaseous pipe discharge can be followed to the internal gas of heap, conveniently collects the gas that the landfill produced, and three branch pipe is established together, and the make full use of pipe practices thrift the cost, and the simple operation moreover, the break-make of each branch pipe of valve control, the control of being convenient for, and prevent that nutrient solution and gas from spilling over from other branch pipes.
In the reinforced treatment system for the bioreactor landfill, preferably, the covering layer comprises three layers, the upper layer and the lower layer are made of geotextile, and the middle layer is made of a high-density polyethylene film with the thickness of 0.25-0.5 mm. According to the traditional landfill, the thickness of the high-density polyethylene film is at least 1.0mm, and the covering layer is the high-density polyethylene film with the thickness of 0.25-0.5 mm, so that part of rainwater uniformly penetrates into a pile body, the humidity of the landfill is increased, water required by a degradation process is provided for microorganisms, and the stabilization process of the landfill is accelerated. Meanwhile, the requirement on the anti-seepage performance is lower, and the manufacturing cost of a sealing anti-seepage system can be reduced.
Compared with the prior art, the utility model has the advantages of:
the covering layer has certain permeability, most of rainwater is discharged out of the landfill reservoir area along the surface of the refuse landfill after passing through the covering layer, and a small part of rainwater uniformly enters the pile body after permeating, so that the humidity of the landfill can be increased, and the necessary moisture for the degradation process is provided for microorganisms. Nutrient solution is injected into the pile body through the nutrient solution injection port of the ventilation unit, 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 microorganism groups in the garbage pile body is improved, the degradation capability of the microorganisms is improved, the accelerated degradation of garbage in a landfill site is realized, the stabilization process of the landfill site is accelerated, the stabilization time is shortened, and the maintenance period is shortened. Therefore, the anti-seepage performance requirement on the anti-seepage system of the landfill site is lower, and the manufacturing cost of the anti-seepage system of the landfill site can be reduced. And a rainwater surface infiltration mode is adopted, so that the uniform distribution of the humidity of the landfill is facilitated, and the generation of non-uniform settlement is avoided. The nutrient solution is rich in nutrient substances, and the garbage in the landfill can be degraded at an accelerated speed by adding a small amount of nutrient solution, so that the generation of uneven settlement is avoided. The composition of the nutrient solution can be adjusted in due time according to the change of the biodegradability of the garbage in the landfill, and the degradation and stabilization of the garbage in the landfill are accelerated. The nutrient solution has less 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 under the aerobic environment, the pile body is rich in moisture and nutrient substances, so that the degradation speed of microorganisms is greatly accelerated; under the action of wind power, the nutrient solution can rapidly permeate into the pile body, the nutrient solution is more uniformly distributed in the pile body, the permeating 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 the 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 needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the enhanced treatment system of the bioreactor landfill.
FIG. 2 is a schematic view of a partial structure of a bioreactor landfill field strengthening treatment system of the present invention.
Illustration of the drawings:
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 and exhausting layer; 6. a cover layer; 7. a wire mesh; 8. a protective layer; 9. and (4) intercepting the flood ditch in a circular field.
Detailed Description
To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.
It should be particularly noted that when an element is referred to as being "fixed to, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.
Unless otherwise defined, all terms of art 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 limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by an existing method.
Example (b):
as shown in fig. 1 and fig. 2, the bioreactor landfill site enhanced treatment system of the present embodiment includes a stack 1, a covering layer 6 is disposed on the top of the stack 1, the covering layer 6 is a low permeability covering layer, an impermeable layer 2 is coated on the periphery of the stack 1, a ventilation unit is disposed in the stack 1, the bottom end of the ventilation unit is inserted into the stack 1, the top end of the ventilation unit is provided with a nutrient solution injection port, and a flow channel of the ventilation unit is shared by flow channels of the nutrient solution injected. The nutrient solution is prepared by mixing clear water, aerobic strains and degrading enzyme according to a certain proportion, and the composition of the nutrient solution can be adjusted timely according to the change of the biodegradability of the garbage in a landfill site, so that the degradation and stabilization of the garbage in the landfill site are accelerated.
In this embodiment, the ventilation unit is a vertical shaft 3, and the vertical shaft 3 is surrounded by a wire mesh 7 and filled with crushed stones. Specifically, the wire mesh 7 is a wire mesh, and the vertical shaft 3 is filled with crushed stones with the diameter of 25-50 mm.
In this embodiment, a gas guiding and exhausting layer 5 is arranged between the stack 1 and the covering layer 6, and the top end of the shaft 3 is connected with the gas guiding and exhausting layer 5 and does not exceed the covering layer 6.
In this embodiment, a guide tube 4 is embedded in the shaft 3, the top end of the guide tube 4 extends out of the covering layer 6 and is led to the outside, and the nutrient solution injection port is directly arranged on the guide tube 4. In particular, the conduit 4 is made of a high density polyethylene material.
In this embodiment, the plurality of through holes are disposed on the tube body of the shaft 3 into which the conduit 4 is inserted, and the distribution density of the through holes is gradually increased from top to bottom.
In this embodiment, the tubular body of the shaft 3 into which the conduit 4 is inserted is surrounded by a permeable protective layer 8. Specifically, the protective layer 8 is 300g/m geotextile.
In this embodiment, a ring field flood interception ditch 9 is arranged around the covering layer 6.
In this embodiment, the top end of the conduit 4 is connected to a first branch 41 for discharging gas, a second branch 42 for connecting to a nutrient solution source, and a third branch 43 for connecting to a blower, and the first branch 41, the second branch 42, and the third branch 43 are respectively provided with a first valve, a second valve, and a third valve.
In this embodiment, the covering layer 6 includes 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 to 0.5 mm.
The treatment method of the enhanced treatment system for the bioreactor landfill site of the embodiment is as follows:
s1: checking whether the guide pipe 4 and the vertical shaft 3 are unobstructed to ensure that the first valve, the second valve, the third valve and the blower are in a closed state;
s2: after the landfill operates for a period of time, opening the first valve of each ventilation unit 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, injecting nutrient solution required by the operation of the landfill site into the pile body 1 by virtue of the second branch pipe 42, and enabling the nutrient solution to enter the pile body 1 of the landfill site through the airflow channel of each ventilation unit and the through hole on the guide pipe 4 for at least 20 minutes;
s4: after the nutrient solution is added, closing the second valve, opening the third valve of each ventilation unit, opening the blower, and continuously injecting air into the stack body 1 for at least 20 minutes;
s5: after the air injection is finished, closing each air blower, closing the third valve and finishing a treatment cycle;
s6: and (5) when the landfill is operated for a period of time, repeating the steps S2-S5 again to finish the next treatment cycle.
The above description is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, the modifications and changes obtained without departing from the technical idea of the present invention shall be considered as the protection scope of the present invention.
Claims (9)
1. A bioreactor landfill field intensity treatment system is characterized in that: the nutrient solution ventilating pile comprises a pile body (1), wherein a covering layer (6) is arranged at the top of the pile body (1), the covering layer (6) is a low-permeability covering layer, an impermeable layer (2) is coated on the periphery of the pile body (1), a ventilating unit is arranged in the pile body (1), the bottom end of the ventilating unit is inserted into the pile body (1), a nutrient solution injection port is formed in the top end of the ventilating unit, and a flow channel formed after nutrient solution is injected shares an airflow channel of the ventilating unit.
2. The bioreactor landfill enhanced treatment system of claim 1, wherein: the ventilation unit is a vertical shaft (3), the vertical shaft (3) is formed by enclosing a wire mesh (7), and broken stones are filled in the vertical shaft.
3. The bioreactor landfill enhanced treatment system of claim 2, wherein: a gas guide and exhaust layer (5) is arranged between the stack 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).
4. The bioreactor landfill enhanced treatment system of claim 2, wherein: a guide pipe (4) is embedded in the vertical shaft (3), a covering layer (6) extends from the top end of the guide pipe (4) and leads to the outside, and the nutrient solution injection port is directly arranged on the guide pipe (4).
5. The bioreactor landfill enhanced treatment system of claim 4, wherein: the pipe body of the guide pipe (4) inserted into the vertical shaft (3) is provided with a plurality of through holes, and the distribution density of the through holes is gradually increased from top to bottom.
6. The bioreactor landfill enhanced treatment system of claim 5, wherein: the outer side of the pipe body of the guide pipe (4) inserted into the vertical shaft (3) is wrapped with a permeable protective layer (8).
7. The bioreactor landfill enhanced treatment system of claim 1, wherein: and a circular field flood interception ditch (9) is arranged around the covering layer (6).
8. The bioreactor landfill enhanced treatment system according to any one of claims 4 to 6, wherein: the top end of the guide pipe (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) for connecting with a blower, and the first branch pipe (41), the second branch pipe (42) and the third branch pipe (43) are respectively provided with a first valve, a second valve and a third valve.
9. The bioreactor landfill enhanced treatment system according to any one of claims 1 to 7, wherein: the covering layer (6) comprises three layers, wherein the upper layer and the lower layer are made of geotextile, and the middle layer is a high-density polyethylene film with the thickness of 0.25-0.5 mm.
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| CN201920578236.1U CN209953474U (en) | 2019-04-25 | 2019-04-25 | Bioreactor landfill field intensity treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109985885A (en) * | 2019-04-25 | 2019-07-09 | 湖南现代环境科技股份有限公司 | A kind of bioreactor landfill intensive treatment system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109985885A (en) * | 2019-04-25 | 2019-07-09 | 湖南现代环境科技股份有限公司 | A kind of bioreactor landfill intensive treatment system and method |
| CN109985885B (en) * | 2019-04-25 | 2024-05-10 | 湖南现代环境科技股份有限公司 | Enhanced treatment system and method for bioreactor landfill |
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