CN108405581A - A kind of restorative procedure of oil-polluted soils - Google Patents
A kind of restorative procedure of oil-polluted soils Download PDFInfo
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- CN108405581A CN108405581A CN201810209720.7A CN201810209720A CN108405581A CN 108405581 A CN108405581 A CN 108405581A CN 201810209720 A CN201810209720 A CN 201810209720A CN 108405581 A CN108405581 A CN 108405581A
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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
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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
- B09C1/08—Reclamation of contaminated soil chemically
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of restorative procedures of oil-polluted soils comprising following steps：(1) oil-polluted soils are turned over；(2) nutrient solution is sprayed into oil-polluted soils, the nutrient solution includes yeast extract and water, and the fountain height of the nutrient solution is so that the yeast extract and the weight ratio of the oil-polluted soils petrochina hydrocarbon are 0.05~0.5：1；(3) it is conserved after step (2).This.Inventive method can be used for repairing the oil-polluted soils of various pollution levels, and removal rate of petroleum hydrocarbons is up to 97%.In addition, the present invention compared with prior art, reduces the processes such as sieve bacterium, domestication, technical costs is reduced while improving treatment effect.And this restorative procedure construction technology is simple, and it is of low cost, it can use on a large scale, the content of organic matter in the soil after reparation is high, and microbial activity is strong, can be used as greening soil.
Description
Technical field
The present invention relates to a kind of specifically for by the restorative procedure of the soil of oil pollution.
Background technology
Oil pollution refers to during exploitation, refining, storing, use, and crude oil and various petroleum products enter environment
Pollution caused by and.Have studies have shown that field area soil receives different degrees of oil pollution, oil content highest in soil
It is more than 500~1000 times of environmental background value up to 23%.The light components such as alkane, aromatic hydrocarbons account for total amount in soil petroleum component
50% or more, provide reliable material base for biological prosthetic or with other reclamation activities developments of combining.
Oil can change the physicochemical properties such as moisture content, the organic matter of soil after entering soil environment, on the one hand influence soil
In microorganism the Nomenclature Composition and Structure of Complexes, hinder root system of plant breathing and the absorption to nutrition, cause plant undergrowth even dead；
On the other hand it causes the salinization of soil, poison, leading to soil fail and waste and ruined.And since oil cohesive force is strong, by petroleum wastewater
Oily substance focuses primarily upon in the agric of 0cm~40cm in the soil of dye, and oil content is with the increase of depth in reducing
Gesture.And in petroleum hydrocarbon many components all have the effects that teratogenesis, carcinogenic, mutagenesis, therefore its Toxic can by crops into
Enter Food-Chain System, is directly detrimental to health.Oil pollution place has seriously affected the economic development of China field area, ecology
Environment and agricultural production become the main restricting factor of local society, economy and harmonious development.
The main restorative procedure of oil pollution has Physical, chemical method, bioanalysis three categories.And microbial remediation method due to
Expense easy to operate is low, it is small to ambient contamination, do not generate the advantages such as secondary pollution substantially and have become soil petroleum pollution and repair
Multiple important technology.Currently, Many researchers are dedicated to filtering out oil degradation bacteria from oil-polluted soils, and by containing
It is tamed in the culture medium of different petroleum concentrations, efficient oil degradation microbial bacterial agent is prepared into, applies in oil
In contaminated soil, the reparation of contaminated soil is carried out.
Such as application No. is the patent applications of CN201710405103.X to disclose a kind of oil-polluted soils renovation agent system
Preparation method, soil-repairing agent system is that adjust liquid, petroleum hydrocarbon degradation microbial inoculum, solid waste carrier, biology by soil poly-
Object microbial inoculum and nutrient solution is closed to constitute, after applying the inorganic agent, for 5% or below oil-polluted soils, temperature 5~
10 DEG C of condition petroleum degradation rates are up to 3 9%~4 3.7%；In 1 5~2 0 DEG C of condition petroleum degradation rates up to 5 9.8%, temperature exists
2 5~3 0 DEG C of conditions, petroleum degradation rate is up to 87.5% or more.Application No. is the patent application publications of CN201610442234.0
A kind of microbe soil conditioner for oil-polluted soils, the modifying agent include that crimping column mushroom mycelia, flash slide rust
Umbrella, Acinetobacter calcoaceticus, Sphingol single-cell, pyrene degradation bacteria, Glomus etunicatum, cephalosporium roseum, Aureobasidium pullulans, nitrile water
Solve enzyme, long chain alkane degrading enzyme, two iron alkane hydroxylase of conformity membrane, phenylalanine deaminase, arginine dihydrolase, red flat red
Coccus, pseudomonas aeruginosa, enuatrol, thiamine hydrochloride, calcium pantothenate, oyster shell powder, vermiculite power, Paspalum wettsteinii powder, Kentucky
Fragrant thoroughwort powder, Caulis Miscanthis floriduli powder, alfalfa juice powder, pig manure grain, sheep manure grain, gamma-polyglutamic acid, malic acid, citric acid and nostoc powder；
The mutual coordinated of all types of microorganisms in the modifying agent, and with its support material collective effect, using the modifying agent to victory
Sharp oil field different type oil contaminated soil is handled, and contaminated soil petrochina hydrocarbon total amount removal rate reaches 77.68%~
89.76%.
These methods can increase degradation efficiency of the microorganism to oil, but there is still a need for further carry degradation efficiency
It is high.In addition, these existing method and technologies are complicated, the screening of microorganism and domestication time are longer, and the throwing of external microorganism
Original microbiologic population in soil can be destroyed by adding, and be not suitable for large area and used.
Invention content
It is notable the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a kind of removal rate of petroleum hydrocarbons
The restorative procedure of raising and simple oil-polluted soils.
The present invention is to solve the above problems, the technical solution taken is as follows：
A kind of restorative procedure of oil-polluted soils comprising following steps：
(1) oil-polluted soils are turned over；
(2) nutrient solution is sprayed into oil-polluted soils, the nutrient solution includes yeast extract and water, the nutrition
The fountain height of liquid is so that the yeast extract and the weight ratio of the oil-polluted soils petrochina hydrocarbon are 0.05~0.5：
1；
(3) it is conserved after step (2).
A specific aspect according to the present invention, sprays nutrient solution while being turned over described in progress.
Further, the yeast extract is yeast extract and/or yeast extract, and the nutrient solution is yeast extract
And/or yeast extract is dissolved in water to be formed.Further, the water to configure yeast extract aqueous solution can be tap water or ground
Table water.
Preferably, the content for controlling water in the nutrient solution so that the soil moisture content after sprinkling is 30~60%.
Preferably, the fountain height of the nutrient solution is so that the yeast extract and stone in the oil-polluted soils
The weight ratio of petroleum hydrocarbon is 0.08~0.4：1.
According to the present invention, the maintenance is that soil is instigated to maintain a period of time under a certain state.It usually removes necessary
Condition (temperature, water content, oxygen content) control is outer, without other operations.
According to an aspect of the present invention, maintenance is made to be conserved at ambient temperature.
According to another aspect of the invention, soil moisture content is 30~60% when control maintenance.Moisture content can pass through sprinkling
Suitable water controls.
Preferably, during step (3) maintenance, interval once turns over soil in 3~7 days, is conducive to make to have in soil
Sufficient oxygen.
One according to the present invention specific and preferred aspect, kept during the maintenance soil moisture content be 30~
60%, curing time is 20 days or more.When curing temperature is at 20 DEG C or less, curing time is 45 days or more, more preferable 50 days
More than, further preferred 60 days or more.When curing temperature is more than 20 DEG C, curing time is 30 days or more.It is preferred that 30~45 days.
According to the present invention, if oil-polluted soils depth is more than 30cm, preferably carries out layering and turn over, every layer of ploughed depth
About 15~25cm often turns over one layer, sprays one time of nutrition liquid or sprays nutrient solution when turning over.
The content of petroleum hydrocarbon described in oil-polluted soils of the present invention is 500~10000mg/kg.
" moisture content " of the present invention refers to mass percent of the water in the substance containing it.
Compared with prior art, beneficial effects of the present invention are as follows：
Inventors be surprised to learn that, yeast extract is while promoting microbial growth, also in lot of experiments
Microorganism can be promoted to generate surfactant.Can be micro- by adding a certain amount of yeast extract into oil-polluted soils
Biology provides nitrogen source, growth factor, various amino acid and trace element, and stimulation rapid microbial growth is bred, and microorganism is enhanced
Activity, promote microorganism to the catabolism of oil, achieve the purpose that reparation.Meanwhile by turning over increase soil to soil
Oxygen content in earth, further enhances repairing effect.
The method of the present invention can be used for repairing the oil-polluted soils of various pollution levels, and removal rate of petroleum hydrocarbons is up to 97%.
In addition, the present invention compared with prior art, reduces sieve bacterium, the processes such as domestication, while improving treatment effect reduction technology at
This.And this restorative procedure construction technology is simple, and it is of low cost, it can use on a large scale, the organic matter in soil after reparation
Content is high, and microbial activity is strong, can be used as greening soil.
Specific implementation mode
It is known that yeast extract (yeast extract and yeast extract) is rich in protein, amino acid, peptide, polypeptide, nucleic acid, dimension
The nutritional ingredients such as raw element and trace element, are widely used in microculture industry in the prior art.At soil pollution
Reason field, yeast extract are often added in the medium as trace element to use.
The present inventor it has been investigated that, yeast extract except can be used as nutriment promote microorganism growth in addition to, additionally it is possible to promote
Surfactant is generated into microorganism.It is demonstrated experimentally that using this characteristic of yeast extract, as nutrient solution according to certain
Amount be added in oil-polluted soils, be greatly promoted the degradation of oil, dramatically increase oil-polluted soils reparation effect
Fruit.
Below in conjunction with specific embodiment, the present invention will be further described in detail, and the condition being not specified in embodiment is
The condition of this field routine.Address substance dosage, additive amount when, unless stated otherwise, refer both to weight.
Microwave solvent extraction standard method of the soil oil content according to EPA3546 is measured in the present invention.
Embodiment 1
Soil is turned over first, yeast extract aqueous solution is sprayed during turning over.Control yeast extract aqueous solution
Fountain height, it is the 8% of oil-polluted soils petrochina hydrocarbon total amount to make the weight of yeast extract.The moisture content of soil is after sprinkling
40%, turn over mixing.In the case where environment temperature is 25~30 DEG C, 30d (day) is conserved.During maintenance amalgamation time is turned over every 5d.Experiment
Be used as blank control CK not add the soil of yeast extract simultaneously, CK and experimental group under same moisture content, temperature condition into
Row maintenance.Soil petrochina content is measured before and after repairing, testing result such as the following table 1.
Detection data before and after 1 soil remediation of table
Oil hydrocarbon content is down to 168mg/kg, degradation rate 92.7% after addition yeast extract reparation.Blank pair after processing
It is down to 2105mg/kg, degradation rate 9.2%, far below the degradation rate of addition yeast extract according to the oil hydrocarbon content of CK.
Embodiment 2
The oil-polluted soils restorative procedure of this example is substantially with embodiment 1, the difference is that curing time is 20d.Before reparation
Soil petrochina content is measured afterwards, testing result such as the following table 2.
Detection data before and after 2 soil remediation of table
After conserving 20d, oil hydrocarbon content is down to 622mg/kg, degradation rate 73.2% after adding yeast extract reparation.Place
The oil hydrocarbon content of blank control CK is down to 2168mg/kg, degradation rate 6.5% after reason.Yeast leaching is added compared with conserving 30d
Powder reparation and the petroleum degradation rate of blank control CK are relatively low.Mainly curing time is shorter, and microbial degradation is incomplete.
Embodiment 3
Oil-polluted soils are turned over first, yeast extract aqueous solution is sprayed during turning over.Control yeast leaching
Amidin fountain height, it is the 15% of oil-polluted soils petrochina hydrocarbon total amount to make the weight of yeast extract, and soil contains after sprinkling
Water rate is 50%, turns over mixing.Environment temperature is 28~37 DEG C, conserves 35d.During maintenance amalgamation time is turned over every 3d.Experiment is same
When carried out under same moisture content, temperature condition with experimental group as blank control CK, CK using the soil for not adding yeast extract
Maintenance.Soil petrochina content is measured before and after repairing, testing result such as the following table 3.
Detection data before and after 3 soil remediation of table
Oil hydrocarbon content is down to 258mg/kg, degradation rate 96.9% after addition yeast extract reparation.Blank pair after processing
Oil hydrocarbon content according to CK is 7254mg/kg, degradation rate 13.4%, far below the degradation rate of addition yeast extract.
Comparative example 1
The oil-polluted soils restorative procedure of this example is substantially with embodiment 2, the difference is that the amount of yeast extract is oily pollution
The 3% of the amount of soil petrochina.Soil petrochina content is measured before and after repairing, testing result such as the following table 4.
Detection data before and after 4 soil remediation of table
Oil hydrocarbon content is down to 2152mg/kg, degradation rate 74.3% after addition yeast extract reparation.Blank pair after processing
Oil hydrocarbon content according to CK is 7241mg/kg, degradation rate 13.6%.The petroleum degradation rate that yeast extract additive amount is 3% is remote
Less than the degradation rate that additive amount is 15%.Mainly since yeast extract additive amount is relatively low, the life of microorganism cannot be rapidly promoted
Long metabolism, causes repairing effect poor.
Embodiment 4
Soil is turned over first, yeast extract aqueous solution is sprayed during turning over.Control yeast extract aqueous solution
Fountain height, it is the 20% of soil petrochina total amount to make the weight of yeast extract, and soil moisture content is 40% after sprinkling, is turned over mixed
It is even.Environment temperature is 15~20 DEG C, conserves 75d.During maintenance amalgamation time is turned over every 6d.Experiment is not simultaneously to add yeast extract
Soil conserved under same moisture content, temperature condition with experimental group as blank control CK, CK.It repairs front and back to soil
Petrochina content is measured, testing result such as the following table 5.
Detection data before and after 5 soil remediation of table
Oil hydrocarbon content is down to 193mg/kg, degradation rate 95.3% after addition yeast extract reparation.Blank pair after processing
Oil hydrocarbon content according to CK is 3784mg/kg, degradation rate 9.3%, far below the degradation rate of addition yeast extract.
Embodiment 5
The oil-polluted soils restorative procedure of this example is substantially with embodiment 4, the difference is that curing period interval 15d turns over amalgamation
It is secondary.Soil petrochina content is measured before and after repairing, testing result such as the following table 6.
Detection data before and after 6 soil remediation of table
Oil hydrocarbon content is down to 740mg/kg, degradation rate 82.2% after addition yeast extract reparation.Blank pair after processing
Oil hydrocarbon content according to CK is 3872mg/kg, degradation rate 7.2%.Compared with interval, 6d turns over amalgamation time, interval is turned over mixed for 15d days
The primary reparation of addition yeast extract and the petroleum degradation rate of blank control CK is relatively low.It is too long mainly to turn over interval of doing time,
Oxygen content is inadequate in soil, is unfavorable for the growth metabolism of microorganism, causes repairing effect poor.
Embodiment 6
Soil is turned over first, yeast extract aqueous solution is sprayed during turning over.Control yeast extract aqueous solution
Fountain height, it is the 25% of soil petrochina total amount to make the weight of yeast extract, and the moisture content of soil is 35% after sprinkling, is turned over mixed
It is even.Environment temperature is 20~25 DEG C, conserves 60d.During maintenance amalgamation time is turned over every 4d.Experiment is not simultaneously to add yeast extract
Soil conserved under same moisture content, temperature condition with experimental group as blank control CK, CK.It repairs front and back to soil
Petrochina content is measured, testing result such as the following table 7.
Detection data before and after 7 soil remediation of table
Oil hydrocarbon content is down to 179mg/kg, degradation rate 94.3% after addition yeast extract reparation.Blank pair after processing
Oil hydrocarbon content according to CK is 2831mg/kg, degradation rate 10.0%, far below the degradation rate of addition yeast extract.
Embodiment 7
The oil-polluted soils restorative procedure of this example is substantially with embodiment 6, the difference is that curing temperature is reduced to 10~15
℃.Soil petrochina content is measured before and after repairing, testing result such as the following table 8.
Detection data before and after 8 soil remediation of table
Oil hydrocarbon content is down to 892mg/kg, degradation rate 71.6% after addition yeast extract reparation.Blank pair after processing
Oil hydrocarbon content according to CK is 2978mg/kg, degradation rate 5.3%.Compared with curing temperature is 20~25 DEG C, addition yeast leaching
Powder reparation and the petroleum degradation rate of blank control CK are relatively low.Main cause is that curing temperature is relatively low, and microbial activity is poor, no
Conducive to its decomposing petroleum hydrocarbon, cause repairing effect poor.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of restorative procedure of oil-polluted soils, which is characterized in that include the following steps：
(1) oil-polluted soils are turned over；
(2) nutrient solution is sprayed into oil-polluted soils, the nutrient solution includes yeast extract and water, the nutrient solution
Fountain height is so that the yeast extract and the weight ratio of the oil-polluted soils petrochina hydrocarbon are 0.05~0.5：1；
(3) it is conserved after step (2).
2. the restorative procedure of oil-polluted soils according to claim 1, which is characterized in that is turned over described in progress is same
When spray nutrient solution.
3. the restorative procedure of oil-polluted soils according to claim 1, which is characterized in that the yeast extract is ferment
Mother's leaching powder and/or yeast extract, the nutrient solution are that yeast extract and/or yeast extract are dissolved in water to be formed.
4. the restorative procedure of oil-polluted soils according to claim 1 or 3, which is characterized in that control the nutrient solution
The content of middle water so that the soil moisture content after sprinkling is 30~60%.
5. the restorative procedure of oil-polluted soils according to claim 1 or 3, which is characterized in that the nutrient solution
Fountain height is so that the yeast extract and the weight ratio of the oil-polluted soils petrochina hydrocarbon are 0.08~0.4：1.
6. the restorative procedure of oil-polluted soils according to claim 1, which is characterized in that curing time be 20 days with
On, it is 30~60% that soil moisture content is kept during the maintenance,.
7. the restorative procedure of oil-polluted soils according to claim 1 or 6, which is characterized in that curing temperature is at 20 DEG C
Hereinafter, curing time is 45 days or more.
8. the restorative procedure of oil-polluted soils according to claim 1 or 6, which is characterized in that curing temperature is more than 20
DEG C, curing time is 30 days or more.
9. the restorative procedure of oil-polluted soils according to claim 1, which is characterized in that during step (3) conserves,
Soil is once turned over every 3~7 days.
10. the restorative procedure of oil-polluted soils according to claim 1, which is characterized in that the oil-polluted soils
Described in petroleum hydrocarbon content be 500~10000mg/kg.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293001A (en) * | 2018-10-23 | 2019-02-01 | 西南石油大学 | A kind of method of microbial degradation total petroleum hydrocarbon |
| CN112980450A (en) * | 2021-02-05 | 2021-06-18 | 北京沃太斯环保科技发展有限公司 | Activator for in-situ remediation of deep polluted soil microorganisms and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102533552A (en) * | 2011-01-04 | 2012-07-04 | 张卫木 | Biological degradation agent used for oil pollution control |
| CN104312949A (en) * | 2014-10-10 | 2015-01-28 | 苏州市环境科学研究所 | Organic chloride pollutant purifying method as well as purifying agent and culture solution used by method |
-
2018
- 2018-03-14 CN CN201810209720.7A patent/CN108405581A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102533552A (en) * | 2011-01-04 | 2012-07-04 | 张卫木 | Biological degradation agent used for oil pollution control |
| CN104312949A (en) * | 2014-10-10 | 2015-01-28 | 苏州市环境科学研究所 | Organic chloride pollutant purifying method as well as purifying agent and culture solution used by method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293001A (en) * | 2018-10-23 | 2019-02-01 | 西南石油大学 | A kind of method of microbial degradation total petroleum hydrocarbon |
| CN112980450A (en) * | 2021-02-05 | 2021-06-18 | 北京沃太斯环保科技发展有限公司 | Activator for in-situ remediation of deep polluted soil microorganisms and application thereof |
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