CN110449461A - A kind of aggregation of non-homogeneous strata crude oil and biodegrading process - Google Patents
A kind of aggregation of non-homogeneous strata crude oil and biodegrading process Download PDFInfo
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- CN110449461A CN110449461A CN201910795959.1A CN201910795959A CN110449461A CN 110449461 A CN110449461 A CN 110449461A CN 201910795959 A CN201910795959 A CN 201910795959A CN 110449461 A CN110449461 A CN 110449461A
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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
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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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Abstract
The invention proposes a kind of aggregation of non-homogeneous strata crude oil and biodegrading process and a kind of nutrient solution, including ammonium phosphate, ammonium chloride, urea, disodium-hydrogen, sodium peroxide, surfactant and water, the content of nitrogen is 7-10wt% in the nutrient solution, the content of the P elements is 5-9wt%, and the pH of the nutrient solution is 5-8.The present invention is in repair process, nutrient solution is added, the growth of indigenous microorganism in soil is stimulated containing surfactant, oxygen release agent, biological nutrients and other substances etc. and promotes degradation of the indigenous microorganism to petroleum pollution in soil, crude oil pollution object remaining in soil layer is subjected to efficient degradation to realize, degradation rate is not less than 85%.
Description
Technical field
The present invention relates to technical field of soil remediation, and in particular to a kind of aggregation of non-homogeneous strata crude oil and degradation side
Method.
Background technique
With economic rapid growth, oil demand amount constantly rises always, however petroleum exploitation, transport, storage and
Can all there be a degree of leakage during using etc., petroleum of these leakages can not only pollute earth's surface, can also penetrate into
Underground water pollutes it, when petroleum is due to leaking into ground water regime, since its is carcinogenic, teratogenesis, mutagenesis and portion
Great threat will be brought to life, the production of the mankind by being divided into point characteristic difficult to degrade, and soil Central Plains oil pollutant is in soil layer
In mainly based on free state, residual, gaseous state and solubilised state.Free state is the part that can move freely after by gravity, residual
State is grogs absorbed portion, and gaseous state is state component of volatilizing in aeration zone hole, and solubilised state is then the part being dissolved in underground water.So
And the state of crude oil pollution object is not unalterable, and a series of effect of mass transmitting such as molecule diffusion, Convention diffusion can be passed through
It mutually converts, leads to long-term pollution.
Summary of the invention
The present invention provides aggregation and the biodegrading process of a kind of non-homogeneous strata crude oil, by the way that battalion is added in repair process
Nutrient solution stimulates the life of indigenous microorganism in soil containing surfactant, oxygen release agent, biological nutrients and other substances etc.
Grow and promote degradation of the indigenous microorganism to petroleum pollution in soil, thus realize by crude oil pollution object remaining in soil layer into
Row efficient degradation, degradation rate are not less than 85%.
The present invention provides a kind of nutrient solution, including ammonium phosphate, ammonium chloride, urea, disodium-hydrogen, sodium peroxide, surface
Activating agent and water, the content of nitrogen is 7-10wt% in the nutrient solution, and the content of the P elements is 5-9wt%, the battalion
The pH of nutrient solution is 5-8.
Improved as of the invention further, the surfactant is zwitterionic surfactant, selected from lecithin,
One or more of amino acid pattern or betaine type.
As further improvement of the invention, the content of the surfactant is 1-3wt%, and the sodium peroxide contains
Amount is 7-12wt%.
The present invention further protects a kind of above-mentioned nutrient solution improving soil degrading energy for enhancing edaphon vigor
Application in power.
The present invention further protects aggregation and the biodegrading process of a kind of heterogeneous coating crude oil, comprising the following steps:
S1. water-level fluctuation: non-homogeneous strata is placed in water, and opens vibration, under water-level fluctuation, local impermeability lens
Body and large area silty sandy loam aquiclude intercept and capture crude oil, assemble crude oil largely in water level line or so and upside, at this
Collect crude oil；
S2. simulated precipitation: in soil layer overhead simulated precipitation, after the area You Ju be largely distributed in water level line position and thin-
Crude oil is collected in thick interface at this；
S3. sprinkle nutrient solution: uniformly drenching above-mentioned nutrient solution step S2 treated in soil layer, at a suitable temperature into
Row microbial degradation obtains the soil layer after crude oil is largely degraded.
As further improvement of the invention, the sprinkle amount of the nutrient solution is 200-500mL/m2。
As further improvement of the invention, after microbial degradation 2-5 days, the degradation rate of the crude oil is not less than
85%。
As further improvement of the invention, the vibration frequency 700-1000Hz.
As further improvement of the invention, the suitable temperature is 30-45 DEG C.
As further improvement of the invention, the precipitation of the simulated precipitation is 5-15mm/h.
The invention has the following beneficial effects: the present invention under water-level fluctuation, and the redistribution process of crude oil is with vertical migration
Based on, the interface initial stage of oil migration to soil layer can lead to lateral migration due to its content and capillary pressure deficiency, work as soil layer
Interface when there is water-level fluctuation repeatedly, crude oil can not often be returned from original route completely, thus separately be warded off in vertical direction
New route causes distributed areas gradually to be widened；When crude oil migrates forward close to local impermeability lenticular body in soil layer, lens
Body can effectively intercept and capture crude oil, it is made to form the area You Ju of average oil content 6. 12% in the left and right of lenticular body and upside；
After simulated precipitation, the high Areas of crude oil can just be fixed on the upper and lower sides of water level after earth's surface stable level, can obtain in this area
Take the crude oil of 50-70%.
In repair process, nutrient solution is added, contains surfactant, oxygen release agent, biological nutrients and other substances
Etc. stimulating the growth of indigenous microorganism in soil and promote degradation of the indigenous microorganism to petroleum pollution in soil, thus real
Crude oil pollution object remaining in soil layer is now subjected to efficient degradation, degradation rate is not less than 85%.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is each group pedotheque Crude Oil removal rate comparison diagram in test case 1 of the present invention；
Fig. 2 is enzyme activity comparison diagram in each group pedotheque in test case 2 of the present invention；
Fig. 3 is soil microbe quantity comparison diagram in each group pedotheque in test case 2 of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
A kind of nutrient solution, including ammonium phosphate, ammonium chloride, urea, disodium-hydrogen, sodium peroxide, lecithin and water, the nutrition
The content of nitrogen is 7wt% in liquid, and the content of the P elements is 5wt%, and the pH of the nutrient solution is 5.The lecithin
Content is 1wt%, and the content of the sodium peroxide is 7wt%.
Embodiment 2
A kind of nutrient solution, including ammonium phosphate, ammonium chloride, urea, disodium-hydrogen, sodium peroxide, the work of betaine type amphoteric surface
Property agent and water, the content of nitrogen is 10wt% in the nutrient solution, and the content of the P elements is 9wt%, the nutrient solution
PH is 8.The content of the surfactant is 3wt%, and the content of the sodium peroxide is 12wt%.
Embodiment 3
A kind of nutrient solution, including ammonium phosphate, ammonium chloride, urea, disodium-hydrogen, sodium peroxide, the work of amino acid type amphoteric surface
Property agent and water, the content of nitrogen is 8wt% in the nutrient solution, and the content of the P elements is 7wt%, the pH of the nutrient solution
It is 6.5.The content of the surfactant is 2wt%, and the content of the sodium peroxide is 10wt%.
Embodiment 4
A kind of nutrient solution, including ammonium phosphate, ammonium chloride, urea, disodium-hydrogen, sodium peroxide, the work of amino acid type amphoteric surface
Property agent and water, the content of nitrogen is 2wt% in the nutrient solution, and the content of the P elements is 15wt%, the nutrient solution
PH is 9.The content of the surfactant is 2wt%, and the content of the sodium peroxide is 20wt%.
Embodiment 5
A kind of aggregation of heterogeneous coating crude oil and biodegrading process, comprising the following steps:
S1. water-level fluctuation: non-homogeneous strata is placed in water, and is opened and is vibrated, vibration frequency 700Hz, under water-level fluctuation, office
Portion's impermeability lenticular body and large area silty sandy loam aquiclude intercept and capture crude oil, keep crude oil big in water level line or so and upside
Amount aggregation, collects crude oil at this；
S2. simulated precipitation: in soil layer overhead simulated precipitation, precipitation 5mm/h, after the area You Ju be largely distributed in
Crude oil is collected in water level line position and thin-thick interface at this；
S3. sprinkle nutrient solution: embodiment 1 is stated into nutrient solution and uniformly drenches step S2 treated in soil layer, sprinkle amount is
200mL/m2, microbial degradation is carried out at a temperature of 30 DEG C, obtains the soil layer after crude oil is largely degraded, degradation rate 87%.
Embodiment 6
A kind of aggregation of heterogeneous coating crude oil and biodegrading process, comprising the following steps:
S1. water-level fluctuation: non-homogeneous strata is placed in water, and is opened and is vibrated, vibration frequency 1000Hz, under water-level fluctuation, office
Portion's impermeability lenticular body and large area silty sandy loam aquiclude intercept and capture crude oil, keep crude oil big in water level line or so and upside
Amount aggregation, collects crude oil at this；
S2. simulated precipitation: in soil layer overhead simulated precipitation, precipitation 15mm/h, after the area You Ju be largely distributed in
Crude oil is collected in water level line position and thin-thick interface at this；
S3. sprinkle nutrient solution: embodiment 2 is stated into nutrient solution and uniformly drenches step S2 treated in soil layer, sprinkle amount is
500mL/m2, microbial degradation is carried out at a temperature of 45 DEG C, obtains the soil layer after crude oil is largely degraded, degradation rate 92%.
Embodiment 7
A kind of aggregation of heterogeneous coating crude oil and biodegrading process, comprising the following steps:
S1. water-level fluctuation: non-homogeneous strata is placed in water, and is opened and is vibrated, vibration frequency 850Hz, under water-level fluctuation, office
Portion's impermeability lenticular body and large area silty sandy loam aquiclude intercept and capture crude oil, keep crude oil big in water level line or so and upside
Amount aggregation, collects crude oil at this；
S2. simulated precipitation: in soil layer overhead simulated precipitation, precipitation 10mm/h, after the area You Ju be largely distributed in
Crude oil is collected in water level line position and thin-thick interface at this；
S3. sprinkle nutrient solution: embodiment 3 is stated into nutrient solution and uniformly drenches step S2 treated in soil layer, sprinkle amount is
350mL/m2, microbial degradation is carried out at a temperature of 37 DEG C, obtains the soil layer after crude oil is largely degraded, degradation rate 96%.
Embodiment 8
A kind of aggregation of heterogeneous coating crude oil and biodegrading process, comprising the following steps:
S1. water-level fluctuation: non-homogeneous strata is placed in water, and is opened and is vibrated, vibration frequency 850Hz, under water-level fluctuation, office
Portion's impermeability lenticular body and large area silty sandy loam aquiclude intercept and capture crude oil, keep crude oil big in water level line or so and upside
Amount aggregation, collects crude oil at this；
S2. simulated precipitation: in soil layer overhead simulated precipitation, precipitation 10mm/h, after the area You Ju be largely distributed in
Crude oil is collected in water level line position and thin-thick interface at this；
S3. sprinkle nutrient solution: embodiment 4 is stated into nutrient solution and uniformly drenches step S2 treated in soil layer, sprinkle amount is
350mL/m2, microbial degradation is carried out at a temperature of 37 DEG C, obtains the soil layer after crude oil is largely degraded, degradation rate 57%.
Comparative example 1
A kind of aggregation of heterogeneous coating crude oil and biodegrading process, comprising the following steps:
S1. simulated precipitation: in soil layer overhead simulated precipitation, precipitation 10mm/h, after the area You Ju be largely distributed in
Crude oil is collected in water level line position and thin-thick interface at this；
S2. sprinkle nutrient solution: embodiment 3 is stated into nutrient solution and uniformly drenches step S2 treated in soil layer, sprinkle amount is
350mL/m2, microbial degradation is carried out at a temperature of 37 DEG C, obtains the soil layer after crude oil is largely degraded, degradation rate 62%.
Comparative example 2
A kind of aggregation of heterogeneous coating crude oil and biodegrading process, comprising the following steps:
S1. water-level fluctuation: non-homogeneous strata is placed in water, and is opened and is vibrated, vibration frequency 850Hz, under water-level fluctuation, office
Portion's impermeability lenticular body and large area silty sandy loam aquiclude intercept and capture crude oil, keep crude oil big in water level line or so and upside
Amount aggregation, collects crude oil at this；
S3. sprinkle nutrient solution: embodiment 3 is stated into nutrient solution and uniformly drenches step S2 treated in soil layer, sprinkle amount is
350mL/m2, microbial degradation is carried out at a temperature of 37 DEG C, obtains the soil layer after crude oil is largely degraded, degradation rate 55%.
Comparative example 3
A kind of aggregation of heterogeneous coating crude oil and biodegrading process, comprising the following steps:
S1. water-level fluctuation: non-homogeneous strata is placed in water, and is opened and is vibrated, vibration frequency 850Hz, under water-level fluctuation, office
Portion's impermeability lenticular body and large area silty sandy loam aquiclude intercept and capture crude oil, keep crude oil big in water level line or so and upside
Amount aggregation, collects crude oil at this；
S2. simulated precipitation: in soil layer overhead simulated precipitation, precipitation 10mm/h, after the area You Ju be largely distributed in
Crude oil, crude oil total removal rate 50% are collected in water level line position and thin-thick interface at this.
Comparative example 4
A kind of aggregation of heterogeneous coating crude oil and biodegrading process, comprising the following steps:
S1. water-level fluctuation: non-homogeneous strata is placed in water, and is opened and is vibrated, vibration frequency 850Hz, under water-level fluctuation, office
Portion's impermeability lenticular body and large area silty sandy loam aquiclude intercept and capture crude oil, keep crude oil big in water level line or so and upside
Amount aggregation, collects crude oil at this；
S2. simulated precipitation: in soil layer overhead simulated precipitation, precipitation 10mm/h, after the area You Ju be largely distributed in
Crude oil is collected in water level line position and thin-thick interface at this；
S3. sprinkle nutrient solution: nutrient solution in the prior art is uniformly drenched step S2 treated in soil layer, sprinkle amount is
350mL/m2, microbial degradation is carried out at a temperature of 37 DEG C, obtains the soil layer after crude oil is largely degraded, degradation rate 49%.
Test case 1
5-8 of the embodiment of the present invention and comparative example 1-4 is subjected to the test of soil crude oil removal, the result is shown in Figure 1.Annotation: * be with it is right
Ratio 4 is compared, P < 0.05.
As shown in Figure 1, soil is eluted using nutrient solution prepared by the present invention in embodiment 5-7, creates one and fits
The environment for closing microbe survival and breeding carries out microbial degradation to crude oil, cooperates water-level fluctuation shower and simulated precipitation elution,
Crude oil removal reaches 87-96%, hence it is evident that better than the crude oil removal for using existing similar nutrient solution to be eluted in comparative example 4
(49%).The nutrient solution configured in embodiment 8 using embodiment 4, nutrition-allocated proportion and pH value are not suitable for microbe survival, degradation
Inefficient, only 57%.It is eluted in comparative example 1 using water-level fluctuation+nutrient solution, simulated precipitation+nutrient solution is used in comparative example 2
It elutes, water-level fluctuation+simulated precipitation is used in comparative example 3, crude oil removal is not so good as embodiment 7, only 50-62%.
Test case 2
5-8 of the embodiment of the present invention and comparative example 1-4 is subjected to the measurement that soil carries out total enzyme activity and total micro organism quantity, as a result
See Fig. 2 and 3.Annotation: * is P < 0.05 compared with comparative example 4.
By Fig. 2 and 3 it is found that eluting using nutrient solution prepared by the present invention to soil in embodiment 5-7, one is created
It is suitble to the environment of microbe survival and breeding, soil enzyme vigor is high, is 227-297mg/g, soil microbe quantity is more, is
16.7-17.6×106A/g, hence it is evident that be better than comparative example 4(132mg/g, 8.2 × 106A/g).Embodiment 4 is used in embodiment 8
The nutrient solution of configuration, nutrition-allocated proportion and pH value are not suitable for microbe survival, and soil enzyme vigor is 152mg/g, edaphon
Amount is 10.2 × 106A/g.It is eluted in comparative example 1 using water-level fluctuation+nutrient solution, simulated precipitation+nutrition is used in comparative example 2
Liquid elutes, and water-level fluctuation+simulated precipitation is used in comparative example 3, and soil enzyme vigor and soil microbe quantity are not so good as embodiment
7。
Compared with prior art, the present invention is under water-level fluctuation, and the redistribution process of crude oil is based on vertical migration, crude oil
The interface initial stage migrated to soil layer can lead to lateral migration due to its content and capillary pressure deficiency, when the interface of soil layer goes out
When now water-level fluctuation repeatedly, crude oil can not often be returned from original route completely, thus separately warded off new route in vertical direction and caused
Distributed areas are gradually widened；When crude oil migrates forward close to local impermeability lenticular body in soil layer, lenticular body can be effective
Crude oil is intercepted and captured on ground, it is made to form the area You Ju of average oil content 6. 12% in the left and right of lenticular body and upside；In simulated precipitation
Afterwards, the high Areas of crude oil can just be fixed on the upper and lower sides of water level after earth's surface stable level, can obtain 50-70%'s in this area
Crude oil.
In repair process, nutrient solution is added, contains surfactant, oxygen release agent, biological nutrients and other substances
Etc. stimulating the growth of indigenous microorganism in soil and promote degradation of the indigenous microorganism to petroleum pollution in soil, thus real
Crude oil pollution object remaining in soil layer is now subjected to efficient degradation, degradation rate is not less than 85%.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of nutrient solution, which is characterized in that living including ammonium phosphate, ammonium chloride, urea, disodium-hydrogen, sodium peroxide, surface
Property agent and water, the content of nitrogen is 7-10wt% in the nutrient solution, and the content of the P elements is 5-9wt%, the nutrition
The pH of liquid is 5-8.
2. nutrient solution according to claim 1, which is characterized in that the surfactant is zwitterionic surfactant,
Selected from one or more of lecithin, amino acid pattern or betaine type.
3. nutrient solution according to claim 1, which is characterized in that the content of the surfactant is 1-3wt%, the mistake
The content of sodium oxide molybdena is 7-12wt%.
4. one kind nutrient solution as described in any one of claim 1-3 claim is improving soil for enhancing edaphon vigor
Application in earth degradation capability.
5. aggregation and the biodegrading process of a kind of heterogeneous coating crude oil, which comprises the following steps:
S1. water-level fluctuation: non-homogeneous strata is placed in water, and opens vibration, under water-level fluctuation, local impermeability lens
Body and large area silty sandy loam aquiclude intercept and capture crude oil, assemble crude oil largely in water level line or so and upside, at this
Collect crude oil；
S2. simulated precipitation: in soil layer overhead simulated precipitation, after the area You Ju be largely distributed in water level line position and thin-
Crude oil is collected in thick interface at this；
S3. sprinkle nutrient solution: nutrient solution described in claim 1 is uniformly drenched step S2 treated in soil layer, be suitable for
At a temperature of carry out microbial degradation, obtain crude oil largely degradation after soil layer.
6. a kind of aggregation of heterogeneous coating crude oil and biodegrading process according to claim 5, which is characterized in that the nutrition
The sprinkle amount of liquid is 200-500mL/m2。
7. a kind of aggregation of heterogeneous coating crude oil and biodegrading process according to claim 5, which is characterized in that described micro-
After biodegradable 2-5 days, the degradation rate of the crude oil is not less than 85%.
8. a kind of aggregation of heterogeneous coating crude oil and biodegrading process according to claim 5, which is characterized in that the vibration
Frequency 700-1000Hz.
9. a kind of aggregation of heterogeneous coating crude oil and biodegrading process according to claim 5, which is characterized in that described to be suitable for
Temperature be 30-45 DEG C.
10. a kind of aggregation of heterogeneous coating crude oil and biodegrading process according to claim 5, which is characterized in that the mould
The precipitation of quasi- precipitation is 5-15mm/h.
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Citations (5)
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|---|---|---|---|---|
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| EP1292403A1 (en) * | 2000-03-10 | 2003-03-19 | Jerry D. Nickell | Improved in-situ deep remediation injection system and method |
| CN103865796A (en) * | 2014-03-21 | 2014-06-18 | 杭州水询环保科技有限公司 | Microbial complex nutrient solution for biological treatment of wastewater |
| CN104373065A (en) * | 2014-06-04 | 2015-02-25 | 中国石油化工集团公司 | Oil base drill chip processing method |
| CN104907331A (en) * | 2015-05-27 | 2015-09-16 | 山东康诚石油化工科技股份有限公司 | Soil biological repair method |
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2019
- 2019-08-27 CN CN201910795959.1A patent/CN110449461A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993000178A1 (en) * | 1991-06-21 | 1993-01-07 | Plant Research Laboratories | Use of metallic peroxides in bioremediation |
| EP1292403A1 (en) * | 2000-03-10 | 2003-03-19 | Jerry D. Nickell | Improved in-situ deep remediation injection system and method |
| CN103865796A (en) * | 2014-03-21 | 2014-06-18 | 杭州水询环保科技有限公司 | Microbial complex nutrient solution for biological treatment of wastewater |
| CN104373065A (en) * | 2014-06-04 | 2015-02-25 | 中国石油化工集团公司 | Oil base drill chip processing method |
| CN104907331A (en) * | 2015-05-27 | 2015-09-16 | 山东康诚石油化工科技股份有限公司 | Soil biological repair method |
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| 潘玉英 等: "地下水位波动及降水对原油在非均质土层中重分布的影响", 《环境科学研究》 * |
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Application publication date: 20191115 |