CN106391697A - Method for in-situ repair of polluted soil - Google Patents
Method for in-situ repair of polluted soil Download PDFInfo
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- CN106391697A CN106391697A CN201610943433.XA CN201610943433A CN106391697A CN 106391697 A CN106391697 A CN 106391697A CN 201610943433 A CN201610943433 A CN 201610943433A CN 106391697 A CN106391697 A CN 106391697A
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- contaminated soil
- soil
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- butane
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- 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
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The invention provides a method for in-situ repair of polluted soil. The method comprises the step of injecting butane and air into the polluted soil. According to the method, in-situ repair of the polluted soil is achieved.
Description
Technical field
A kind of the present invention relates to recovery technique field of contaminated soil, in particular it relates to side of in-situ immobilization contaminated soil
Method.
Background technology
At present, the development of China's contaminated soil remediation method far can not adapt to the soil pollution increasingly sharpening.China's soil
The total exceeding standard rate of earth is the 16.1% of test point position.China's contaminated soil remediation research is just being experienced from laboratory to practical scale mistake
Cross the stage, the backroom boys of association area, in some typical IAs, have carried out the contaminated soil of practical scale in situ
With Ex situ bioremediation experiment.For example, comfort irrigated area using immobilized microorganism technology and Mycorrhizal Technology in Shen and carry out contaminated soil
In-situ immobilization is tested, and has carried out prefabricated bed Ex situ bioremediation test of practical scale etc. in Liaohe Oil Field.China is micro- at present
Biological restoration is mainly adds Inoculating microbes degradation of contaminant.
In the prior art, for the Treatment process of contaminated site, mainly have burning method, fixing/stabilising, thermal desorption,
The methods such as the extracting of soil steam, drip washing, chemical treatment.
Burning method is the main method that early stage organic polluted soil is repaired, and is also to be applied to contaminated soil of site reparation earliest
Method.Burning method is more complete to the process of pollutant, but high to treatment facility and site requirements, and Financial cost is expensive, and
Very big to the destructiveness of soil, it is also possible to when burning incomplete produce two bigger English pollutant of toxicity.
Fixing/stabilising method is to avoid or slow down the administering method that the pollutant in contaminated soil discharge, the party
Method generally will not destroy the pollutant in soil completely, but avoids harmful substance to discharge to surrounding.Fixing/stabilising
Method simply temporarily pollutant immobilization, prevents pollutant to soil pollution, but can not thoroughly clear the pollution off.
Thermal desorption method is a new non-combustible firing method, mainly for the pollutant of volatilization and half volatile.Heat is de-
Subsidiary formula method is to volatile contaminant high treating effect, less to the destruction of soil, and operation equipment is simple and easy compared with burning method
Operation.But due to soil need to integrally be heated to more than the boiling point of pollutant, the energy being consumed is still high, and need to be to volatilizing
The pollutant coming carry out subsequent treatment.
Soil steam extraction process be one utilize physical method remove unsaturated soil in volatile organic contaminant former
Position soil remediation method.The method produces negative pressure using vacuum pump orders about air and flows through contaminated soil hole and be desorbed and carry secretly
Organic component flow direction extracts well, makes pollutant eventually enter into exhaust treatment system and is processed.Soil steam method for extracting can
Strong operability, the scope processing pollutant is wider, can be operated by standard device, does not destroy Soil structure and gives up to recycling
Thing has potential value.But, the method requirement soil texture is homogeneous, good penetrability, porosity are big, humidity is little and subsoil water
Position is relatively low, need to carry out after-treatment to the gas extracting.
Elution method is come the heavy metal in eluting soil using water or the leacheate containing chemical enhanced medicament, then to drip washing
Liquid is collected the process processing with physical chemistry.Soil leaching method to the reparation ratio of contaminated soil more thoroughly, but spends ratio
Higher.Having a large population and a few land, the countries and regions that soil seems very precious can adopt, but enough economic strengths will be had to give
Support.Elution method has leacheate and needs subsequent treatment and the problem being likely to result in secondary pollution.
Method of chemical treatment is, by chemical method, the oxidation operation in soil is reduced to nontoxic or hypotoxicity material.Should
Method can be processed to pollutant effectively, reduces the toxicity of pollutant.But chemical repair method has handling
With height, environment is easily caused with the shortcomings of secondary pollution, poor operability.Additionally, for the larger contaminated soil of area, at chemistry
Logos has the difficulty in concrete operations.
Therefore it is still necessary to relatively low, the easily operated contaminated soil processing method of cost.
Content of the invention
The inventors discovered that original position microorganism remediation does not need excavation, migration stain soil, and pass through in contaminated soil
Injection microbial nutrition material or oxygen supply are it becomes possible to promote the growth and breeding of microorganism in contaminated soil, using the generation of microorganism
The activity of thanking carrys out degradation of contaminant.
Butane and air are injected contaminated soil by the present invention, have stimulated the growth of the indigenous microorganism of energy degradation of contaminant,
Realize the degraded to pollutant by microbial metabolism or Co metabolism.
In the present invention, by butane and air injection contaminated soil, butane spreads rapidly, provides for indigenous microorganism and supports
Point.Microorganism first passes through oxygenation enzyme activation butane, generates alcohol under aerobic conditions, and oxidation further generates aldehyde, directly finally
Assimilate and produce biomass or be oxidized to carbon dioxide and produce energy.Microbial population increases considerably, thus
It is rapidly completed the degraded of pollutant in soil.Carry out in metabolic process in microorganism using butane growth and breeding, consume dirty simultaneously
Dye thing, pollutant provide the intermediate material in microbial metabolism, make pollutant realize Degradation.Microorganism is in growth course
Degraded to pollutant is completed by metabolism or common metabolic effect.
The invention provides a kind of method of in-situ immobilization contaminated soil, the method is included butane and air injection pollution
In soil.
In an aspect, contaminated soil is included selected from following at least one microorganisms：In pseudomonass family
Pseudomonass, variovorax, Chryseobacterium sp, comamonas, acidophilic bacteria, Stenotrophomonas, Sphingobacterium, Flavobacterium,
In Fu Late Bordetella, actinomycetes, Nocardia, Rhod, Gordonia bronchialis, class Nocardia, pleocidin produce
Micrococcus luteus, oral cavity in bacterium, Micropolyspora, Promicromonospora, Intrasporangium, Pseudonocardia, luer bacterium, micrococcuss
Coccus, planococcus, staphylococcuses, Aerococcuses, dyspepsiacoccus, peptostreptococcuses, fecal bacteria, Gamella, piece coccus,
Aeromonass in bright beading coccus, Ruminococcus, sarcina and streptococcus, Hu Junke, vibrio, Plesiomonas,
In zymomonas, color rope antibacterial, Cardiobacterium, Calymmatobacterium, streptobacilluss, Eikenella and Gardnerella, root nodule bacteria
Phyllobacterium, root nodule bacteria, slowly raw root nodule bacteria, the gliding bacteria biting in cellulose bacteria, non-generation antibacterial, golden bacillus in corynebacterium
Genus, agromycin, Arachnia, Rothia, acetobacter, actinomycetes, Arcanobacterium, Lachnospira, propionibacterium, true
Antibacterial, hay spore, bacillus bifiduss, Microbacterium, Bacillus and high temperature anaerobic Bacillus.
In an aspect, the scope injecting the amount of butane in described contaminated soil is 0.024L/ days/m3Soil is extremely
0.16L/ days/m3Contaminated soil is it is preferable that be 0.048L/ days/m3Contaminated soil.
In an aspect, the scope injecting the amount of air in described contaminated soil is 4.8L/ days/m3Soil is extremely
9.6L/ days/m3Contaminated soil is it is preferable that be 7.68L/ days/m3Contaminated soil.
In an aspect, butane is injected in described contaminated soil with pulse per hour for 10 minutes.
In an aspect, air is injected in described contaminated soil with pulse per hour for 10 minutes.
In an aspect, the temperature range of contaminated soil is 15 DEG C to 45 DEG C.
In an aspect, the water content ranges of contaminated soil are 10% to 20%.
In an aspect, contaminated soil includes at least one in following pollutant：Trichloro-benzenes, Perchlorobenzene,
And polyaromatic, such as benzo (a) anthracene, benzo (a) pyrene, benzo (b) fluoranthene, benzo (k) fluoranthene, dibenzo (ah) anthracene and indeno
(1,2,3-cd) pyrene.
In an aspect, the injection length of wherein butane and air is 60 days to 2 years.
In an aspect, the invention provides a kind of injecting systems for implementing the inventive method.
The method according to the invention can realize the in-situ immobilization to contaminated soil at lower cost.
Brief description
Fig. 1 be according to embodiments of the invention 1 process soil after, the schematic diagram of pollutant in soil content；
Fig. 2 be according to embodiments of the invention 2 process soil after, the schematic diagram of pollutant in soil content；
Fig. 3 be according to embodiments of the invention 3 process soil after, the schematic diagram of pollutant in soil content；
Fig. 4 be process soil according to the comparative examples 1 of the present invention after, the schematic diagram of pollutant in soil content；
Fig. 5 be process soil according to the comparative examples 2 of the present invention after, the schematic diagram of pollutant in soil content；
Fig. 6 be process soil according to the comparative examples 3 of the present invention after, the schematic diagram of pollutant in soil content；
Fig. 7 is the structural representation of the injecting systems of the present invention.
Specific embodiment
Fig. 7 specifically show the structural representation of the injecting systems of the present invention, and wherein reference is as follows：
1- microorganism nutrient supply source；2- oxygen-containing gas supply source；
111- first main pipeline；112- first branch pipe(tube)；12- air relief valve；13- first drying chamber；131- first row air valve；
14- first pressure sensor；15- first filter；16- the first controlling switch valve；17- first flowmeter；18- first is unidirectional
Valve；19- first inlet；
211- second main pipeline；212- second branch pipe(tube)；222- air cleaner assembly；221- pressure regulator valve；23- second is dry
Dry tank；231- second row air valve；24- second pressure sensor；25- second filter；26- the second controlling switch valve；27- second
Effusion meter；28- second check valve；29- second inlet.
Referring to Fig. 7, the injecting systems of the present invention mainly include：Microorganism nutrient supply source for the injection of microorganism nutrient
1st, the first inlet 19, the first controlling switch valve 16；For the oxygen-containing gas supply source 2 of oxygen-containing gas injection, the second inlet
29th, the second controlling switch valve 26；And control chamber (not shown in Fig. 7).
Wherein, microorganism nutrient supply source 1 is connected with the first main pipeline 111；For to injection microorganism in contaminated soil
First inlet 19 of nutrient is connected with the first main pipeline 111 by the first branch pipe(tube) 112；First controlling switch valve 16 is connected to
First branch pipe(tube) 112, such that it is able to control the break-make of the first branch pipe(tube) 112.
Alternatively, the quantity in microorganism nutrient supply source 1, and the quantity of the first branch pipe(tube) 112 can be one, also may be used
Think multiple.In the present embodiment, setting microorganism nutrient supply source 1 is one, provides microorganism nutrient for contaminated soil.Setting
Multiple first branch pipe(tube)s 112, are arranged in correspondence with multiple first inlets 19, and each first inlet 19 is correspondingly connected to one
One branch pipe(tube) 112, to be uniformly injected into microorganism nutrient to large-area contaminated soil simultaneously.The plurality of first branch pipe(tube) 112
All it is connected with the first main pipeline 111, and each described first branch pipe(tube) 112 is respectively connected with a first controlling switch valve 16.Fig. 7
In the first main pipeline 111 be one, the first branch pipe(tube) 112 is two.
Alternatively, each first branch pipe(tube) 112 is respectively connected with first flowmeter 17 and the first check valve 18.First flowmeter
17 effect is to calculate gas flow, and can transmit data on flows to control chamber, and shows in screen.First
The effect of check valve 18 is to flow backwards to prevent the gas in the first branch pipe(tube) 112 from producing.
Along the injection direction of microorganism nutrient, that is, along from the direction of microorganism nutrient supply source the 1 to the first inlet 19, the
It is connected with air relief valve 12, the first drying chamber 13, first pressure sensor 14, the first filter 15 in turn in one main pipeline 111.Its
In, the effect of air relief valve 12 is to keep the stable gas pressure in the first main pipeline 111；The effect of the first drying chamber 13 is will be micro-
Biological nutrients are dried；The effect of first pressure sensor 14 is to obtain the pressure data in the first main pipeline 111, and can
Pressure data to be transmitted to control chamber and show in screen；The effect of the first filter 15 is for filtering microorganism nutrient
Impurity.
In addition, the first drying chamber 13 is also associated with first row air valve 131, it is dried to first with preventing gas pressure too high
Tank 13 causes to damage.
Oxygen-containing gas supply source 2 is connected with the second main pipeline 211；For in contaminated soil inject oxygen-containing gas second
Inlet 29 is connected with described second main pipeline 211 by the second branch pipe(tube) 212；Second controlling switch valve 26 is connected to described
Two branch pipe(tube)s 212, such that it is able to control the break-make of the second branch pipe(tube) 212.
Alternatively, the quantity of oxygen-containing gas supply source 2, and the quantity of the second branch pipe(tube) 212 can for one it is also possible to
For multiple.In the present embodiment, setting oxygen-containing gas supply source 2 is one, provides oxygen for contaminated soil.Arrange multiple second
Pipeline 212, is arranged in correspondence with multiple second inlets 29, and each second inlet 29 is correspondingly connected to second branch pipe(tube)
212, to be uniformly injected into oxygen-containing gas to large-area contaminated soil simultaneously.The plurality of second branch pipe(tube) 212 is all main with second
Pipeline 211 connects, and each second branch pipe(tube) 212 is respectively connected with a second controlling switch valve 26.The second main pipeline in Fig. 7
211 are one, and the second branch pipe(tube) 212 is two.
Alternatively, each second branch pipe(tube) 212 is respectively connected with second flowmeter 27 and the second check valve 28.Second flowmeter
27 effect is to calculate gas flow, and can transmit data on flows to control chamber, and shows in screen.Second
The effect of check valve 28 is to flow backwards to prevent the gas in the second branch pipe(tube) 212 from producing.
Along the injection direction of oxygen-containing gas, that is, along from the direction of oxygen-containing gas supply source the 2 to the second inlet 29, second is main
It is connected with the second drying chamber 23, pressure regulator valve 221, second pressure sensor 24 and the second filter 25 in turn in pipeline 211.Its
In, the effect of pressure regulator valve 221 is to adjust the air pressure in the second main pipeline 211；The effect of the second drying chamber 23 is by micro- life
Thing nutrient is dried；The effect of second pressure sensor 24 is in order to obtain the pressure data in the second main pipeline 211 and permissible
Pressure data is transmitted to control chamber and shows in screen；The effect of the second filter 25 is for filtering microorganism nutrient
Impurity.
In addition, the second drying chamber 23 is also associated with second row air valve 231, it is dried to second with preventing gas pressure too high
Tank 23 causes to damage.
And, before the second drying chamber 23, the second main pipeline 211 is also associated with air cleaner assembly 222, with to defeated
The air entering the second main pipeline 211 carries out preliminary filtration.
Control chamber is all electrically connected with the first controlling switch valve 16 and the second controlling switch valve 26, and passes through the first controlling switch
Valve 16 and the second controlling switch valve 26 control the first branch pipe(tube) 112 and the break-make of the second branch pipe(tube) 212 respectively.By control chamber pair
The automatically controlling of first controlling switch valve 16 and the second controlling switch valve 26, just need not manually operate injection microorganism nutrient and
Oxygen-containing gas, saves manpower.
In a schematic embodiment, the first inlet 19 is by butane with 0.024L/ days/m3Contaminated soil is extremely
0.16L/ days/m3Contaminated soil injection rate injection contaminated soil, and the first inlet 19 by butane with pulse 10 per hour
In minute injection contaminated soil.Second inlet 29 is by oxygen-containing gas with 4.8L/ days/m3Contaminated soil was to 9.6L/ days/m3Pollution
In the injection rate injection contaminated soil of soil, and described oxygen-containing gas is noted by the second inlet 29 with pulse per hour for 10 minutes
Enter in contaminated soil.
The injecting systems of the present invention, control first switch control valve 16 and the second controlling switch valve 26 by control chamber, with
Control the first branch pipe(tube) 112 and the break-make of the second branch pipe(tube) 212, be injected into the micro- life in contaminated soil such that it is able to precise control
Thing nutrient and oxygen-containing gas amount, promote the breeding of microorganism, accelerate the degraded of pollutant.This injecting systems simply easily manipulates, and fits
Close large-scale application in actual repairing polluted soil.
Using the above-mentioned injecting systems of the present invention, following examples and comparative examples are carried out.
Embodiment 1
Prepare to include benzo (a) anthracene, benzo (a) pyrene, benzo (b) fluoranthene, benzo (k) fluoranthene, dibenzo (ah) anthracene and indenes
And the mound of (1,2,3-cd) pyrene, a size of 5m × 5m × 2.5m, water content is 12%.
At 27 DEG C, butane is injected by mound by the first inlet 19 of above-mentioned injecting systems, inject the amount of butane every time
For 3L, inject 10 minutes per hour, 0.125L.
Air is injected mound by the second inlet 29 of above-mentioned injecting systems, the amount of injection air is 480L every time,
Inject 10 minutes per hour, 20L.
As said procedure, every 4 days injection butane and air once, continue the time of 6 months.
The 0th day, the 45th day, the 90th day, the 120th day and the soil sample to process in the 180th day after treatment.Detection sample
In product, various pollutant are in the content of different time points.Result is shown in shown in Fig. 1.
Embodiment 2,3 and comparative examples 1-3
Using such as above-described embodiment 1 identical process step, under being carried out using cited different parameter in table 1 below
State embodiment.
In the above-described embodiments, the 0th day after treatment, the 45th day, the 90th day, the 120th day and the 180th day are to process
Soil sample.In detection sample, various pollutant are in the content of different time points.Result is shown in shown in Fig. 1-6 respectively.
Result：
It can be seen from figure 1 that with the injection of butane and air, the process that the concentration of polycyclic aromatic hydrocarbon declines to a great extent, finally 6
The individual month lowering of concentration of polycyclic aromatic hydrocarbon more than 77% afterwards.
It can be seen in fig. 2 that with the injection of butane and air, the lowering of concentration of polycyclic aromatic hydrocarbon 55% afterwards at 6 months.
As can be seen from Fig. 3, with the injection of butane and air, the lowering of concentration of polycyclic aromatic hydrocarbon 61% afterwards at 6 months.
And for not being injected simultaneously into comparative examples 1-3 of butane and air, from Fig. 4-6, through 180 days
Experiment after, the pollutant levels in soil have almost no change.
In being filled with the embodiment of butane and air, all kinds of polycyclic aromatic hydrocarbons degraded than unimplanted butane degraded more
Hurry up.Embodiment 1-3 is finally attained by preferable repairing effect.
Although specifically describing some embodiments, it will be apparent to those skilled in the art that disclosed in can changing
Embodiment.Therefore, above-mentioned embodiment is nonrestrictive.
Claims (10)
1. a kind of method of in-situ immobilization contaminated soil, methods described is included in butane and air injection contaminated soil.
2. method according to claim 1, wherein said contaminated soil is included selected from following at least one microorganisms：
Pseudomonass in pseudomonass family, variovorax, Chryseobacterium sp, comamonas, acidophilic bacteria, Stenotrophomonas, sphingol
Nocardia, Rhod, Gordonia bronchialis, class Nocard's bacilluss in Bacillus, Flavobacterium, Fu Late Bordetella, actinomycetes
Genus, pleocidin producing bacteria, Micropolyspora, Promicromonospora, Intrasporangium, Pseudonocardia, luer bacterium, thin ball
Micrococcus luteus in bacterium, Stomatococcus, planococcus, staphylococcuses, Aerococcuses, dyspepsiacoccus, peptostreptococcuses, fecal bacteria, twin
Aeromonass in green-ball Pseudomonas, piece coccus, bright beading coccus, Ruminococcus, sarcina and streptococcus, Hu Junke,
Vibrio, Plesiomonas, zymomonas, color rope antibacterial, Cardiobacterium, Calymmatobacterium, streptobacilluss, Eikenella and Jia De
Receive Pseudomonas, Phyllobacterium in root nodule bacteria, root nodule bacteria, slowly raw root nodule bacteria, the gliding bacteria biting in cellulose bacteria, non-generation antibacterial,
Golden Bacillus, agromycin, Arachnia, Rothia, acetobacter, actinomycetes, Arcanobacterium, hair spiral shell in corynebacterium
Pseudomonas, propionibacterium, eubacteria, hay spore, bacillus bifiduss, Microbacterium, Bacillus and high temperature anaerobic Bacillus.
3. method according to claim 1, the scope wherein injecting the amount of butane in described contaminated soil is 0.024L/
My god/m3Soil was to 0.16L/ days/m3Contaminated soil is it is preferable that be 0.048L/ days/m3Contaminated soil.
4. method according to claim 1, the scope wherein injecting the amount of air in described contaminated soil is 4.8L/
My god/m3Soil was to 9.6L/ days/m3Contaminated soil is it is preferable that be 7.68L/ days/m3Contaminated soil.
5. method according to claim 1, wherein butane are injected in described contaminated soil with pulse per hour for 10 minutes.
6. method according to claim 1, wherein air are injected in described contaminated soil with pulse per hour for 10 minutes.
7. method according to claim 1, the temperature range of wherein said contaminated soil is 15 DEG C to 45 DEG C.
8. method according to claim 1, the water content ranges of wherein said contaminated soil are 10% to 20%.
9. method according to claim 1, wherein said contaminated soil includes in following pollutant at least one
Kind：Trichloro-benzenes, Perchlorobenzene, benzo (a) anthracene, benzo (a) pyrene, benzo (b) fluoranthene, benzo (k) fluoranthene, dibenzo (ah) anthracene and indenes
And (1,2,3-cd) pyrene.
10. the injection length of method according to claim 1, wherein butane and air is 60 days to 2 years.
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| CN201610943433.XA CN106391697A (en) | 2016-10-26 | 2016-10-26 | Method for in-situ repair of polluted soil |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107413842A (en) * | 2017-05-22 | 2017-12-01 | 西南交通大学 | A kind of in-situ remediation method of oil-polluted soils |
| CN107497850A (en) * | 2017-09-05 | 2017-12-22 | 杭州更蓝生物科技有限公司 | A kind of complex biological preparation for repairing polluted soil |
| CN107755424A (en) * | 2017-10-15 | 2018-03-06 | 浙江大学 | The method for improving plant extract efficiency using carbon dioxide plus rich and endophyte interaction |
| CN109504641A (en) * | 2018-12-31 | 2019-03-22 | 嘉兴益方环境科技有限公司 | Bacillus subtilis DDT98806 and its application |
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| CN104907330A (en) * | 2015-05-13 | 2015-09-16 | 北京丰泽绿源环境技术有限公司 | In-situ bioremediation method for soils polluted by nitrocompounds |
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| US6175052B1 (en) * | 1997-12-05 | 2001-01-16 | Biosoil B.V. | In-situ method for cleaning soil polluted with halogenated products |
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| CN107413842A (en) * | 2017-05-22 | 2017-12-01 | 西南交通大学 | A kind of in-situ remediation method of oil-polluted soils |
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| CN107755424B (en) * | 2017-10-15 | 2019-12-24 | 浙江大学 | Method for improving plant extraction efficiency by utilizing interaction of carbon dioxide enrichment and endophyte |
| CN109504641A (en) * | 2018-12-31 | 2019-03-22 | 嘉兴益方环境科技有限公司 | Bacillus subtilis DDT98806 and its application |
| CN109504641B (en) * | 2018-12-31 | 2022-04-01 | 嘉兴益方环境科技有限公司 | Bacillus subtilis DDT98806 and application thereof |
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