CN112317532A - Biological pile for repairing petroleum hydrocarbon polluted soil - Google Patents
Biological pile for repairing petroleum hydrocarbon polluted soil Download PDFInfo
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- CN112317532A CN112317532A CN202011213561.1A CN202011213561A CN112317532A CN 112317532 A CN112317532 A CN 112317532A CN 202011213561 A CN202011213561 A CN 202011213561A CN 112317532 A CN112317532 A CN 112317532A
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- 239000002689 soil Substances 0.000 title claims abstract description 78
- 239000003209 petroleum derivative Substances 0.000 title claims abstract description 22
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 238000009423 ventilation Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 239000012528 membrane Substances 0.000 claims abstract description 13
- 238000003860 storage Methods 0.000 claims abstract description 12
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 6
- 231100000719 pollutant Toxicity 0.000 claims abstract description 6
- 230000001502 supplementing effect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 21
- 239000000523 sample Substances 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 13
- 239000003208 petroleum Substances 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- 239000000945 filler Substances 0.000 claims description 11
- 244000005700 microbiome Species 0.000 claims description 11
- 241000894006 Bacteria Species 0.000 claims description 10
- 241000209082 Lolium Species 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 239000004745 nonwoven fabric Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 241000234643 Festuca arundinacea Species 0.000 claims description 6
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- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
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- 230000006378 damage Effects 0.000 claims description 4
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- 238000005728 strengthening Methods 0.000 claims description 4
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- 150000007513 acids Chemical class 0.000 claims description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 3
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
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- 238000006731 degradation reaction Methods 0.000 claims description 3
- YDIQKOIXOOOXQQ-UHFFFAOYSA-H dialuminum;trisulfite Chemical compound [Al+3].[Al+3].[O-]S([O-])=O.[O-]S([O-])=O.[O-]S([O-])=O YDIQKOIXOOOXQQ-UHFFFAOYSA-H 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 239000011256 inorganic filler Substances 0.000 claims description 3
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 3
- 238000003973 irrigation Methods 0.000 claims description 3
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- 239000004571 lime Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000009991 scouring Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000002680 soil gas Substances 0.000 claims description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 230000000813 microbial effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 238000003900 soil pollution Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Mycology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a biological pile for repairing petroleum hydrocarbon polluted soil, which comprises a pile body, an impermeable membrane and a percolate collecting pool, wherein an online monitor is arranged on the left side of the pile body, a nutrient solution storage tank is arranged on the right side of the pile body, a liquid pipeline is connected to the upper end of the nutrient solution storage tank, a water pump is mounted on the liquid pipeline, a spray head is arranged at the left end of the liquid pipeline, a ventilation pipe is arranged in the pile body, and an air inlet at the right end of the ventilation pipe is connected with a high-pressure fan; a biological reactor comprises a reactor body, a pipeline system, an online monitoring system and a percolate system: stacking: an impermeable film is laid at the bottom of the stack body to prevent the diffusion of pollutants; a pipeline system: can be divided into a liquid path pipe and a ventilation pipe which are respectively used for supplementing nutrient solution and water and carrying out forced ventilation. The soil after the biological heap treatment can be planted with plants for further purification treatment. Finally, the soil quality can meet the standard requirements of agricultural soil use.
Description
Technical Field
The invention relates to the technical field of soil pollution remediation, in particular to a biological pile for remediating petroleum hydrocarbon polluted soil.
Background
Certain technical defects still exist in engineering application, and mainly comprise the following two points:
physical methods generally require specific sites and professional equipment, chemical methods require a large amount of chemical agents, and the two types of restoration methods have high restoration cost and are easy to generate secondary pollution.
The bioremediation has the advantages of low cost, small influence on the environment, good treatment effect, no secondary pollution and the like, and is increasingly applied to the remediation of the soil polluted by the petroleum. The biological heap is a biological remediation method which is used for intensively composting polluted soil and simultaneously combines various strengthening measures, such as supplementing a proper amount of water, nutrients, oxygen and the like, so as to create a proper living environment for microorganisms in the heap and further improve the pollutant removal efficiency. With the progress of research, the bio-heap method characterized by enhanced remediation by microorganisms is more and more widely applied to the remediation and treatment of organic contaminated soil, particularly petroleum contaminated soil.
Accordingly, the present invention provides a method for remediating a heap of petroleum hydrocarbon contaminated soil to address the problems set forth above.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a bio-pile for remediating petroleum hydrocarbon contaminated soil.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a restore bio-heap of petroleum hydrocarbon contaminated soil, includes the heap body, prevents osmosis membrane and filtration liquid collecting pit, heap body left side is equipped with on-line monitoring ware, and heap body right side is equipped with the nutrient solution storage tank, and nutrient solution storage tank upper end is connected with the liquid way pipe, installs the water pump on the liquid way pipe, and liquid way pipe left end is equipped with the shower nozzle, heap internal portion is equipped with the ventilation pipe, and ventilation pipe right-hand member air inlet is connected with high pressure positive blower.
As a further scheme of the invention, the bottom of the stack body is provided with an impermeable membrane, and the interior of the stack body is provided with a filling agent.
As a further scheme of the present invention, the upper end of the on-line monitor is electrically connected to a detection line, the other end of the detection line is electrically connected to a monitoring probe, and the monitoring probe is located inside the stack body.
As a further proposal of the invention, the upper end of the pile body is provided with a pile body surface, the upper end of the pile body surface is planted with ryegrass or tall fescue, and the spray head is positioned at the upper side of the pile body.
As a further scheme of the invention, a plurality of air holes are formed in the peripheral side wall of the ventilation pipe, non-woven fabrics are arranged on the surfaces of the air holes, and the non-woven fabrics wrap the surfaces of the air holes.
As a still further aspect of the present invention, the filler can be classified into two major classes, organic and inorganic: the straw, the wood chip and the bark all belong to organic filling agents, the substances can also be used as slow-release nutrient sources to provide nutrient substances for microbial metabolism, the vermiculite and the sandy soil belong to inorganic filling agents, and the adding amount of the filling agents is different according to the types and the physicochemical characteristics of polluted soil.
As a still further aspect of the present invention, the process of bio-heap construction:
the first step is as follows: pretreating contaminated soil, wherein the pretreatment mainly comprises soil homogenization treatment, adjustment of the proportion of potassium carbon, nitrogen and scale in the soil, adjustment of the water content of the soil, addition of 15% of straws, sawdust, barks and the like serving as organic fillers and also serving as slow-release nutrient sources, then sowing of well-adapted petroleum degradation functional bacteria, and fully and uniformly mixing by using a screening and crushing hopper;
the second step is that: selecting an area with smooth ground and relatively high topography as a biological heap strengthening treatment area, designing the size of a biological heap according to the earthwork amount to be treated, measuring and setting out to demarcate a biological heap body area, transferring the soil to be treated to the outside of the area for temporary storage by using an excavator, leveling the area, constructing a herringbone slope, and then paving an impermeable layer and a percolate drainage guide layer in the area;
the third step: a soil layer with the thickness of 0.3m is paved on the impermeable membrane;
the fourth step: arranging ventilation pipes on the surface of the soil layer, and continuously piling up to about 0.8 m after the fixation is finished;
the fifth step: laying a monitoring probe on the soil layer; the method comprises the following steps: soil gas monitoring probes, pH, temperature and moisture monitoring probes;
and a sixth step: continuing to pile up to 1m, carrying out slope repairing operation on the periphery of the pile body, planting ryegrass or tall fescue on the surface and the side surface of the pile body after finishing the trimming, on one hand, fixing the soil on the surface of the pile body to prevent dust and damage the pile body structure by water scouring during sprinkling irrigation, the ryegrass has a synergistic repairing effect on the petroleum hydrocarbon polluted soil, the developed root system can also improve the soil structure, has a promoting effect on the growth of soil microorganisms, and has a certain landscape effect;
the seventh step: installing a nutrient solution and water blending system;
eighth step: debugging, operating and maintaining a biological pile, supplementing nutrient substances required by microorganisms through a nutrient solution and water blending system, wherein the ratio (C: N: P) of 3 elements in soil is 100: 10: 1, petroleum pollutants can be degraded by organisms only by being dispersed into a water phase, the water content is kept at 35%, the oxygen distribution of a pile body is controlled to be uniform and the content of the oxygen is not lower than 10% by a fan and a valve on a ventilation pipe in the operation process, the temperature is controlled, when the temperature is between 30 and 40 ℃, the activity of the microorganisms is highest, the proper pH range of most bacteria is between 5 and 9, when the pH value is slightly higher than 7, the bacteria are in the optimal activity state, when the pH value of polluted soil is too low, a proper amount of lime is added for adjustment, when the pH value is too high, ammonium sulfate or aluminum sulfite is added for adjustment, in the operation process of the biological pile, because the degradation products of certain petroleum substances are acids, and also causes the pH value to drop, so that the pH value of the pile body needs to be regularly detected and properly adjusted in the actual operation process to ensure the smooth operation of the biological pile.
Compared with the prior art, the invention has the beneficial effects that:
1. specific strains are sprayed according to different organic pollutants, and the organic pollutants are efficiently phagocytized.
2. The treatment process has no risk of diffusion of secondary pollutants such as sewage germs and the like.
3. The temperature and the humidity are controlled, the optimal biological treatment environment is realized, and the treatment speed is accelerated.
4. The method can be used for treating the polluted site on site, and can also be used for carrying the polluted soil to other places for centralized treatment, and the adaptability is strong.
5. The device does not need large equipment except for excavating soil, does not need to consume a large amount of energy, and has low cost, less labor and simple maintenance.
6. The soil after the biological heap treatment can be planted with plants for further purification treatment. Finally, the soil quality can meet the standard requirements of agricultural soil use.
Drawings
FIG. 1 is a schematic diagram of a bio-pile for remediation of soil contaminated with petroleum hydrocarbons.
In the figure: 1. an online monitor; 2. an impermeable membrane; 3. a percolate collecting tank; 4. a nutrient solution storage tank; 5. a high pressure fan; 6. a vent pipe; 7. a liquid path pipe; 8. stacking; 9. monitoring the probe; 10. the surface of the stack; 11. a water pump; 12. a spray head; 13. detecting a line; 14. non-woven fabrics; 15. air holes; 16. a filler.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in the embodiment of the present invention, a bio-pile for remedying petroleum hydrocarbon contaminated soil includes a pile body 8, an impermeable membrane 2 and a percolate collecting tank 3, an online monitor 1 is disposed on the left side of the pile body 8, a detection line 13 is electrically connected to the upper end of the online monitor 1, a monitoring probe 9 is electrically connected to the other end of the detection line 13, the monitoring probe 9 is located inside the pile body 8, a nutrient solution storage tank 4 is disposed on the right side of the pile body 8, a liquid path pipe 7 is connected to the upper end of the nutrient solution storage tank 4, a water pump 11 is installed on the liquid path pipe 7, a nozzle 12 is disposed at the left end of the liquid path pipe 7, a pile body surface 10 is disposed at the upper end of the pile body 8, ryegrass or tall fescue is planted at the upper end of the pile body surface 10, the nozzle 12 is located on the upper side of the pile body 8, the impermeable membrane 2 is disposed at the bottom, the high-pressure fan 5 is connected with air inlet of the right end of the ventilation pipe 6, a plurality of air holes 15 are formed in the peripheral side wall of the ventilation pipe 6, non-woven fabrics 14 are arranged on the surfaces of the air holes 15, and the non-woven fabrics 14 wrap the surfaces of the air holes 15.
The bio-heap can be divided into 4 building blocks: the system comprises a stack body, a pipeline system, an online monitoring system and a percolate system. The bottom is laid with an impermeable membrane 2 to prevent diffusion of contaminants. The pipeline system can be divided into a liquid pipeline 7 and a ventilation pipeline 6 which are respectively used for supplementing nutrient solution and moisture and carrying out forced ventilation. The on-line monitoring system can be divided into an on-line monitor 1, a detection line 13 and a monitoring probe 9 and is used for data acquisition of related indexes in the pile body. The percolate system can be divided into an impermeable membrane 2 and a percolate collecting tank 3, wherein the collecting tank is used for collecting percolate generated in the operation process of the stack body 8. Forced ventilation is carried out through a ventilation pipe 6 connected with a high-pressure fan 5, and the 02 in the stack body is supplemented. In addition, the addition of the filler 16 to the soil increases the porosity of the soil and avoids anaerobic zones within the pile. Fillers can be divided into two main classes, organic and inorganic: straw, wood dust, bark and the like belong to organic fillers, and the substances can also be used as slow-release nutrient sources to provide nutrient substances for microbial metabolism; vermiculite, sandy soil and the like belong to inorganic fillers, and the adding amount of the fillers is different according to the types and the physical and chemical properties of polluted soil.
The process of biological heap construction:
(1) the method comprises the following steps of pretreating the polluted soil, wherein the pretreatment mainly comprises soil homogenization treatment, adjustment of the proportion of potassium, nitrogen and scale in the soil, adjustment of the water content of the soil and the like. About 15% of straws, sawdust, barks and the like are added as organic fillers and are also slow-release nutrient sources. Then, the adapted petroleum degradation functional bacteria are sown, and the materials are fully and uniformly mixed by using a screening and crushing hopper.
(2) And selecting an area with flat ground and relatively high topography as a biological pile strengthening treatment area. Designing the size of the biological heap according to the volume of the earth to be treated, measuring and setting out to demarcate the heap body area of the biological heap, and transferring the soil to be treated to the outside of the area for temporary storage by using an excavator. Leveling the area, constructing a herringbone slope, and then paving an impermeable layer and a percolate drainage guide layer in the area.
(3) And a soil layer with the thickness of 0.2-0.4m is paved on the impermeable membrane.
(4) And arranging ventilation pipes on the surface of the soil layer, and continuously piling up to about 0.8 m after the fixation is finished.
(5) Laying monitoring probes in the soil layer, comprising: soil gas monitoring probe, pH, temperature and moisture monitoring probe.
(6) And continuously stacking to 1m, carrying out slope trimming operation on the periphery of the stack body, and planting ryegrass or tall fescue on the surface and the side surface of the stack body after finishing trimming. On one hand, the surface soil of the pile body can be fixed to prevent dust emission and water scouring caused by sprinkling irrigation can destroy the structure of the pile body; the ryegrass has a synergistic repairing effect on petroleum hydrocarbon polluted soil, and the developed root system of the ryegrass can also improve the soil structure, promote the growth of soil microorganisms, and have a certain landscape effect.
(7) And installing a nutrient solution/water blending system.
(8) Debugging, operating and maintaining the biological reactor. The nutrient substances needed by the microorganisms are supplemented through a nutrient solution/water blending system, and the optimal ratio (C: N: P) of the 3 elements in the soil is 100: 10: 1. Petroleum pollutants need to be dispersed in the aqueous phase before they can be biodegraded. Keeping the water content at 30-40%. During the operation, the valves on the fan and the ventilation pipe control the oxygen distribution of the stack body to be uniform and the content to be not less than 10 percent. Controlling the temperature, wherein the microbial activity is highest when the temperature is between 30 and 40 ℃. The proper pH range of most bacteria is between 5 and 9, the bacteria are in the optimal activity state when the pH value is slightly higher than 7, and when the pH value of the polluted soil is too low, a proper amount of lime is usually added for adjustment; when the pH value is too high, ammonium sulfate or aluminum sulfite is often added for adjustment. During operation of the heap, the degradation products of certain petroleum species are acids, which also cause a drop in pH. Therefore, the pH value of the heap body needs to be regularly detected in the actual operation process, and proper adjustment is carried out to ensure the smooth operation of the biological heap.
When the invention is used, the technical principle of the biological heap is to utilize the phageThe oil bacteria can utilize petroleum hydrocarbon as a carbon source, break the chain of long-chain alkane or aromatic hydrocarbon in the petroleum hydrocarbon, and degrade the long-chain alkane or aromatic hydrocarbon into substances which are harmless to the environment, such as short-chain alkane or carbon dioxide and the like, so that the harm to the environment is reduced or eliminated, namely simply the petroleum hydrocarbon, the microorganisms and O2+ nutrient → CO2+H2O + by-product + biomass. It has the advantages that: low treatment cost, no damage to the structure and components of soil, no secondary pollution, good treatment effect on low molecular weight petroleum hydrocarbon and the like.
The petroleum hydrocarbon polluted soil in the invention can be replaced by polycyclic aromatic hydrocarbon and other organic polluted soil, and the surface of the pile body can be covered with an anti-seepage film instead of planting plants.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The utility model provides a restore bio-pile of petroleum hydrocarbon contaminated soil, includes heap body (8), prevention of seepage membrane (2) and filtration liquid collecting pit (3), its characterized in that, heap body (8) left side is equipped with on-line monitoring ware (1), and heap body (8) right side is equipped with nutrient solution storage tank (4), and nutrient solution storage tank (4) upper end is connected with liquid way pipe (7), installs water pump (11) on liquid way pipe (7), and liquid way pipe (7) left end is equipped with shower nozzle (12), heap body (8) inside is equipped with ventilation pipe (6), and ventilation pipe (6) right-hand member air inlet is connected with high pressure positive blower (5).
2. A bio-pile for remediating petroleum hydrocarbon contaminated soil as recited in claim 1, wherein said pile (8) has an impermeable membrane (2) at the bottom thereof, and a filler (16) is disposed within the pile (8).
3. A bio-pile for remediating petroleum hydrocarbon contaminated soil as recited in claim 1, wherein the online monitor (1) is electrically connected to a detection line (13) at an upper end thereof, the other end of the detection line (13) is electrically connected to a monitoring probe (9), and the monitoring probe (9) is located inside the pile body (8).
4. A bio-pile for remediating petroleum hydrocarbon contaminated soil as recited in claim 1, wherein said pile (8) has a pile surface (10) at an upper end thereof, wherein ryegrass or tall fescue is planted at an upper end of the pile surface (10), and wherein said sprinkler (12) is located at an upper side of the pile (8).
5. The bio-pile for remediating petroleum hydrocarbon contaminated soil as recited in claim 1, wherein a plurality of air holes (15) are formed in the peripheral side wall of the ventilation pipe (6), non-woven fabrics (14) are arranged on the surfaces of the air holes (15), and the non-woven fabrics (14) are wrapped on the surfaces of the air holes (15).
6. A bio-pile for remediating petroleum hydrocarbon contaminated soil as recited in claim 2, wherein said filler (16) is selected from the group consisting of organic and inorganic fillers, the organic filler being selected from straw, wood chips, and bark, and the inorganic filler being selected from vermiculite and sand.
7. The process of claim 1-6, wherein the steps are as follows:
the first step is as follows: pretreating contaminated soil, wherein the pretreatment comprises soil homogenization treatment, adjustment of the proportion of potassium carbon, nitrogen and scale in the soil, adjustment of the water content of the soil, addition of 15% of straws, sawdust and barks as organic fillers and a slow-release nutrient source, then sowing of well-adapted petroleum degradation functional bacteria, and full and uniform mixing by using a screening and crushing hopper;
the second step is that: selecting an area with smooth ground and relatively high topography as a biological heap strengthening treatment area, designing the size of a biological heap according to the earthwork amount to be treated, measuring and setting out to demarcate a biological heap body area, transferring the soil to be treated to the outside of the area for temporary storage by using an excavator, leveling the area, constructing a herringbone slope, and then paving an impermeable layer and a percolate drainage guide layer in the area;
the third step: a soil layer with the thickness of 0.3m is paved on the impermeable membrane;
the fourth step: arranging ventilation pipes on the surface of the soil layer, and continuously piling up to about 0.8 m after the fixation is finished;
the fifth step: laying a monitoring probe on the soil layer; the method comprises the following steps: soil gas monitoring probes, pH, temperature and moisture monitoring probes;
and a sixth step: continuing to pile up to 1m, carrying out slope repairing operation on the periphery of the pile body, planting ryegrass or tall fescue on the surface and the side surface of the pile body after finishing the trimming, on one hand, fixing the soil on the surface of the pile body to prevent dust and damage the pile body structure by water scouring during sprinkling irrigation, the ryegrass has a synergistic repairing effect on the petroleum hydrocarbon polluted soil, the developed root system can also improve the soil structure, has a promoting effect on the growth of soil microorganisms, and has a certain landscape effect;
the seventh step: installing a nutrient solution and water blending system;
eighth step: debugging, operating and maintaining a biological pile, supplementing nutrient substances required by microorganisms through a nutrient solution and water blending system, wherein the ratio (C: N: P) of 3 elements in soil is 100: 10: 1, petroleum pollutants can be degraded by organisms only by being dispersed into a water phase, the water content is kept at 35%, the oxygen distribution of a pile body is controlled to be uniform and the content of the oxygen is not lower than 10% by a fan and a valve on a ventilation pipe in the operation process, the temperature is controlled, when the temperature is between 30 and 40 ℃, the activity of the microorganisms is highest, the proper pH range of most bacteria is between 5 and 9, when the pH value is slightly higher than 7, the bacteria are in the optimal activity state, when the pH value of polluted soil is too low, a proper amount of lime is added for adjustment, when the pH value is too high, ammonium sulfate or aluminum sulfite is added for adjustment, in the operation process of the biological pile, because the degradation products of certain petroleum substances are acids, and also causes the pH value to drop, so that the pH value of the pile body needs to be regularly detected and properly adjusted in the actual operation process to ensure the smooth operation of the biological pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011213561.1A CN112317532A (en) | 2020-11-03 | 2020-11-03 | Biological pile for repairing petroleum hydrocarbon polluted soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011213561.1A CN112317532A (en) | 2020-11-03 | 2020-11-03 | Biological pile for repairing petroleum hydrocarbon polluted soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112317532A true CN112317532A (en) | 2021-02-05 |
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Cited By (3)
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| CN113500094A (en) * | 2021-07-26 | 2021-10-15 | 复岘环保科技(上海)有限公司 | Soil pollution monitoring and ecological restoration method |
| CN114477674A (en) * | 2022-02-15 | 2022-05-13 | 江苏博大环保股份有限公司 | Oil sludge bioremediation system |
| CN115007633A (en) * | 2022-06-14 | 2022-09-06 | 贵州大学 | In-situ repair method for lead-zinc waste residue storage yard |
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| CN115007633A (en) * | 2022-06-14 | 2022-09-06 | 贵州大学 | In-situ repair method for lead-zinc waste residue storage yard |
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