CN109821887A - A kind of aeration zone contaminated soil original position anaerobic organism restorative procedure - Google Patents
A kind of aeration zone contaminated soil original position anaerobic organism restorative procedure Download PDFInfo
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- CN109821887A CN109821887A CN201910071139.8A CN201910071139A CN109821887A CN 109821887 A CN109821887 A CN 109821887A CN 201910071139 A CN201910071139 A CN 201910071139A CN 109821887 A CN109821887 A CN 109821887A
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- contaminated soil
- aeration zone
- anaerobic organism
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Abstract
The present invention provides a kind of aeration zone contaminated soil original position anaerobic organism restorative procedure, the biological renovation method using ground sweat mode within the scope of Polluted area by making aeration zone contaminated soil be full of water, it lays and repairs well, nutriment is injected in repairing well, or electron donor is doubled as, the electron donors such as sulfate or nitrate of supplement filling when necessary；To be rapidly achieved repairing effect, the anaerobic organism bacterium tamed can be reinjected, quickly nutriment, electron donor or anaerobic organism bacterium are diffused to by injection compressed gas and repaired in well reparation radius in aeration zone contaminated soil, realize that quick anaerobic organism repairs the purpose of aeration zone contaminated soil, simultaneously by the laying to well is repaired, recoverable region can be clearly determined.
Description
Technical field
The present invention relates to a kind of soil and underground water pollution control technology, and in particular to a kind of aeration zone contaminated soil is in situ
Anaerobic organism restorative procedure.
Background technique
Aeration zone refers to groundwater level up to the space segment of earth's surface.Aeration zone contaminated soil can be excavated,
It is burned again, thermal desorption, chemical treatment or biological prosthetic isotonic reparation, but rehabilitation cost is higher, especially pollution depth
In the case where depth, rehabilitation expense is higher.
Geobiont repair technology is the biodegradation by microorganism to organic contaminants in soil, by pollutant
It is transformed into the recovery technique of innocuous substance.Microorganism is by directly metabolism or co -metabolic degradation organic pollutant, by organic contamination
Object is degraded to the lower pollutant of toxicity or is thoroughly degraded to carbon dioxide and water.Biology in situ recovery technique is good by biological bacteria
Oxygen or anaerobism characteristic can be divided into aerobe recovery technique in situ and anaerobic organism recovery technique in situ.Carbon tetrachloride, chloroform,
The pollutants such as tetrachloro-ethylene and trichloro ethylene are difficult through aerobic biodegradation, but can pass through anaerobic biodegradation.
Patent document CN100553809C provides a kind of method of microbe repairing organic polluted soil in situ, including
The screening and foundation of functional microorganism group and the dispensing of functional microorganism further include the control by stages of repairing condition.This method
The time-to-live for extending functional microorganism improves organic pollutant degradation rate.This method using high frequency time (80 ~ 130 times/
It) medicament is mixed into soil by the method for disturbed soil, and the oxygen in air is made to enter soil.This method belongs to original position
Aerobe reparation；Contaminated soil is solid phase, exists and repairs non-uniform problem；High frequency time mechanical disturbance is difficult to operate, and repairs
Pollution depth it is limited.
Summary of the invention
In order to solve the problems in the existing technology, the present invention provides a kind of aeration zone contaminated soil original position anaerobic organism
Restorative procedure.The biological renovation method is by making aeration zone contaminated soil using ground sweat mode within the scope of Polluted area
It is full of water, lays and repair well, nutriment is injected in repairing well, or double as electron donor, the sulfate of supplement filling when necessary
Or the electron donors such as nitrate；To be rapidly achieved repairing effect, the anaerobic organism bacterium tamed can be reinjected in repairing well, led to
Cross injection compressed gas quickly nutriment, electron donor or anaerobic organism bacterium diffuse to repair well repair radius in wrap
In gas band contaminated soil, realize that quick anaerobic organism repairs the purpose of aeration zone contaminated soil, while by the cloth for repairing well
If recoverable region can clearly be determined.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of aeration zone contaminated soil original position anaerobic organism restorative procedure, which comprises the steps of:
1) aeration zone contaminated soil is made to be full of water by ground sweat mode；
2) it is laid in the region for completing ground sweat and repairs gang of wells；
3) the pressurization injection nutriment in repairing well；
4) the anaerobic organism bacterium that soil target contaminant has been tamed is reinjected in repairing well；
5) the intermittent low dose of injection nutriment of every mouthful of reparation well, so that soil is full of water nutrition material concentration and reaches 2mg/L
More than, continuous service is until soil is up to standard.
Described ground sweat mode refers to: carrying out vertical seepage control, depth to groundwater level on quasi- place boundary of repairing；?
One or more seepage pits and the injected clear water in seepage pit are dug out within the scope of vertical seepage control, and maintain 20 ~ 50cm liquid level, so that
Aeration zone contaminated soil is full of water in Polluted area.
The reparation well depth is consistent with vertical seepage control depth；The specification of the seepage pit are as follows: 0.5 ~ 1.0m is deep.
In repairing well when pressurization injection nutriment, also pressurization injection sulfate or nitrate are supplied as electronics when necessary
Body.
In step 3), 4), 5) in after injected material, have and inject gas by repairing well injected material is made to diffuse to week
The step of side soil.
The nutriment is lactate, acetate, vegetable oil or molasses, the nutriment or also serves as electron donor；
The gas is nitrogen, argon gas or the carbon dioxide of compression.
The reparation well, which is not only used to pressurize, injects nutriment and anaerobic organism bacterium, but also for the injection gas that pressurizes.
The laying is repaired well gang of wells and is included the following steps:
It 1a) determines and repairs radius R；
Four reparation wells 1b) are laid in place in quasi- repair, so that the regular quadrangle that side length is 2R is formed between four reparation wells,
Again in one reparation well of center setting on positive four side；
1c) arrange that other repair well successively according to the method for step 1b), so that the intersection covering of all circles is quasi- to repair place, institute
It states circle to refer to centered on repairing well, radius is the circle for repairing radius R.
Further include step 1d) monitoring well is laid, laying monitoring well includes: that monitoring is laid in the points of tangency of any two circle
Well.
The determining method for repairing radius R are as follows: build one in paraprotehetic place and repair well, around the reparation well
1m successively lays multiple monitoring wells at equal intervals, and past reparation well continuous injection compressed nitrogen 10 ~ after sixty minutes, monitor the molten of well water
Solution nitrogen gas concn can rise to 1mg/L or more and be determined as repairing radius R with a distance from the farthest monitoring well of well from repairing.
Compared with the prior art, the advantages of the present invention are as follows:
1) the technical program uses the contaminated soil original position anaerobic bio-treated method of liquid phase, using water as the liquid phase of medium biology
For restorative procedure than the biological renovation method of solid phase, repairing effect is more evenly, more efficient；
2) the technical program is both used to pressurize using reparation well injects the nutriments such as lactate, acetate, vegetable oil or molasses
(or doubling as electron donor), the electron donors such as sulfate or nitrate and anaerobic organism bacterium, and for injection compressed nitrogen of pressurizeing
The inert gases such as gas, argon gas or carbon dioxide quickly quickly diffuse to the above substance in the contaminated soil for repairing well periphery.Detest
The breeding of oxygen biological bacteria raised growth degrades pollutant, has achieved the purpose that quick reparation aeration zone contaminated soil.It is recoverable
Aeration zone contaminated soil depth is unrestricted, and easy to operate.
Detailed description of the invention
It is described further with reference to the accompanying drawing:
Fig. 1 is the schematic layout pattern that gang of wells is repaired in the method for the invention.
Specific embodiment
Method and effect of the invention are described in further detail in the following with reference to the drawings and specific embodiments.
A kind of aeration zone contaminated soil original position anaerobic organism restorative procedure is repaired using well is repaired, including is walked as follows
It is rapid:
1) vertical seepage control, depth to groundwater level are carried out on Polluted area boundary；
2) seepage pit of 0.5 ~ 1.0m depth is dug out within the scope of vertical seepage control；
3) injected clear water in seepage pit, and about 20 ~ 50cm liquid level is maintained, so that aeration zone contaminated soil is full of in Polluted area
Water；
4) well J1 is repaired in construction flatly in paraprotehetic place, repairs well depth to vertical seepage control depth.From repair well 1m,
2m, 3m... are that 1m lays monitoring well at equal intervals, and maximum distance is usually no more than 20m.It monitors well depth and repairs well depth one
It causes.Toward well J1 continuous injection compressed nitrogen 10 ~ after sixty minutes is repaired, monitor well water dissolution nitrogen can rise to 1mg/L with
On be determined as repairing radius R with a distance from the farthest monitoring well of well from repairing；
5) it is laid in seepage pit region and repairs gang of wells, repair well depth to vertical seepage control depth.Repair well distribution method such as Fig. 1 institute
Show, distance is to lay to repair well J2 on the position of 2R on repairing well J1 arbitrary orientation, and using J1 and J2 as vertex, construction one is just
Square.It is laid in other two vertex position of this positive square and repairs well J7 and reparation well J8；In this positive square
Center lay repair well J4.Centered on actually four reparation wells J1, J2, J7 and J8, four circles that radius is R are repaired
Tangent, the geometric center in the gap that centre is formed is the position of the 5th reparation well J4；
6) other are according to said method laid successively and repairs well, so that all centered on repairing well, radius is the circle for repairing radius
The soil pollution region repaired required for intersection covering.Monitoring well, monitoring well can be laid in the points of tangency of any two circle
Depth is to vertical seepage control depth；
7) nutrition such as well pressurization injection certain amount lactate, acetate, vegetable oil or molasses are repaired to every mouth using water pump
Substance (or doubling as electron donor), and well is repaired by every mouth and injects compressed nitrogen, argon gas or carbon dioxide quickly nutrition
Substance quickly diffuses in the soil for repairing well periphery.When necessary to every mouth repair well pressurization injection certain amount sulfate or
The electron donors such as nitrate, and by inert gases such as injection compressed nitrogen, argon gas or carbon dioxide quickly sulfate or nitre
Hydrochlorate quickly diffuses in the soil for repairing well periphery；
8) to be rapidly achieved repairing effect, water pump can be used and repair well pressurization injection certain amount anaerobic organism bacterium to every mouth again
Agent, and it is quickly that anaerobic organism bacterium is fast by inert gases such as every mouth reparation well injection compressed nitrogen, argon gas or carbon dioxide
Speed diffuses in the soil for repairing well periphery.The anaerobic organism microbial inoculum must be screened in advance, be tamed, and be had to the pollutant of quasi- improvement
Good biological degradation effect；
9) nutriments such as every mouthful of reparation well indirect type low dose pressurization injection lactate, acetate, vegetable oil or molasses are (or simultaneous
Make electron donor), and by inert gases such as injection compressed nitrogen, argon gas or carbon dioxide nutriment is quickly spread,
So that soil saturation water nutrition material concentration reaches 2mg/L or more；
10) the quasi- pollution administered of anaerobic organism bacterium raised growth breeding degradation of indigenous anaerobic organism bacterium or injection in contaminated soil
Object, until contaminated soil is up to standard.
Specific embodiment is provided below
Embodiment 1
1) vertical seepage control, depth 6m, i.e. groundwater level buried depth depth are carried out on Polluted area boundary；
2) seepage pit of 0.5m depth is dug out within the scope of vertical seepage control；
3) injected clear water within the scope of vertical seepage control, and about 20cm liquid level is maintained, so that aeration zone contaminated soil in Polluted area
It is full of water；
4) within the scope of vertical seepage control, as shown in Figure 1, laying monitoring well J1, J2, J3...J9, monitoring well H1, H2, H3 are laid
And H4, reparation radius are 2m, repairing well and monitoring well depth is 6m；
5) J1 repaired well continuous injection compressed nitrogen after 30 minutes, and distance J1 can be made to repair the H1 monitoring well water outside well 2m
Dissolution nitrogen rise to 1mg/L；
6) after repairing well pressurization injection 80L sodium lactate saturated solution to every mouth using water pump, continuous injection compressed nitrogen 30 divides
Clock quickly diffuses to sodium lactate in the soil for repairing well periphery；
7) it repairs well to every mouth using water pump and pressurizes and inject 100L anaerobic organism bacterium solution, continuous injection compressed nitrogen 30 minutes,
Quickly anaerobic organism microbial inoculum is diffused in the soil for repairing well periphery；
8) it is lasting to infuse after every mouth reparation well is injected sodium lactate saturated solution 30 minutes with the flow persistent pressure of 100L per hour
Penetrate compressed nitrogen 30 minutes, then 12 hours repressurizations of interval inject sodium lactate.It so recycles, in monitoring well H1, H2, H3 and H4
The lactic acid na concn of water maintains 2mg/L or more.Until contaminated soil is up to standard.
Embodiment 2
1) vertical seepage control, depth 9m, i.e. groundwater level buried depth depth are carried out on Polluted area boundary；
2) seepage pit of 0.5m depth is dug out within the scope of vertical seepage control；
3) within the scope of vertical seepage control, injected clear water, and about 30cm liquid level is maintained, so that aeration zone contaminated soil in Polluted area
It is full of water；
4) within the scope of vertical seepage control, as shown in Figure 1, laying monitoring well J1, J2, J3...J9, monitoring well H1, H2, H3 are laid
And H4, reparation radius are 3m, repairing well and monitoring well depth is 9m；
5) J1 repaired well continuous injection compressed nitrogen after 50 minutes, and distance J1 can be made to repair the H1 monitoring well water outside well 3m
Dissolution nitrogen rise to 1mg/L；
6) after repairing well pressurization injection 120L sodium lactate saturated solution to every mouth using water pump, continuous injection compressed nitrogen 50 divides
Clock quickly diffuses to sodium lactate in the soil for repairing well periphery；
7) it repairs well to every mouth using water pump and pressurizes and inject 150L anaerobic organism bacterium solution, continuous injection compressed nitrogen 50 minutes,
Quickly anaerobic organism microbial inoculum is diffused in the soil for repairing well periphery；
8) it is lasting to infuse after every mouth reparation well is injected sodium lactate saturated solution 30 minutes with the flow persistent pressure of 200L per hour
Penetrate compressed nitrogen 50 minutes, then 12 hours repressurizations of interval inject sodium lactate.It so recycles, in monitoring well H1, H2, H3 and H4
The lactic acid na concn of water maintains 2mg/L or more.Until contaminated soil is up to standard.
Although above having used general explanation, specific embodiment and test, the present invention is made to retouch in detail
It states, but on the basis of the present invention, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to claimed
Range.
Claims (10)
1. a kind of aeration zone contaminated soil original position anaerobic organism restorative procedure, which comprises the steps of:
1) aeration zone contaminated soil is made to be full of water by ground sweat mode；
2) it is laid in the region for completing ground sweat and repairs gang of wells；
3) the pressurization injection nutriment in repairing well；
4) the anaerobic organism bacterium that soil target contaminant has been tamed is reinjected in repairing well；
5) the intermittent low dose of injection nutriment of every mouthful of reparation well, so that soil is full of water nutrition material concentration and reaches 2mg/L
More than, continuous service is until soil is up to standard.
2. a kind of aeration zone contaminated soil original position as described in claim 1 anaerobic organism restorative procedure, which is characterized in that described
Ground sweat mode refers to: carrying out vertical seepage control, depth to groundwater level on quasi- place boundary of repairing；In vertical seepage control range
One or more seepage pits and the injected clear water in seepage pit are inside dug out, and maintains 20 ~ 50cm liquid level, so that packet in Polluted area
Gas band contaminated soil is full of water.
3. a kind of aeration zone contaminated soil original position as claimed in claim 2 anaerobic organism restorative procedure, which is characterized in that described
It is consistent with vertical seepage control depth to repair well depth；The specification of the seepage pit are as follows: 0.5 ~ 1.0m is deep.
4. a kind of aeration zone contaminated soil original position as described in claim 1 anaerobic organism restorative procedure, which is characterized in that repairing
In multiple well when pressurization injection nutriment, also pressurization injection sulfate or nitrate is as electron donor when necessary.
5. a kind of aeration zone contaminated soil original position as claimed in claim 4 anaerobic organism restorative procedure, which is characterized in that in step
It is rapid 3), 4), 5) in after injected material, have and inject the step that gas makes injected material diffuse to Soil Surrounding by repairing well
Suddenly.
6. a kind of aeration zone contaminated soil original position as claimed in claim 5 anaerobic organism restorative procedure, which is characterized in that described
Nutriment is lactate, acetate, vegetable oil or molasses, the nutriment or also serves as electron donor；The gas is pressure
Nitrogen, argon gas or the carbon dioxide of contracting.
7. a kind of aeration zone contaminated soil original position as claimed in claim 5 anaerobic organism restorative procedure, which is characterized in that described
It repairs well and is not only used to pressurize and inject nutriment and anaerobic organism bacterium, but also for the injection gas that pressurizes.
8. a kind of aeration zone contaminated soil original position as described in claim 1 anaerobic organism restorative procedure, which is characterized in that described
Reparation well gang of wells is laid to include the following steps:
It 1a) determines and repairs radius R；
Four reparation wells 1b) are laid in place in quasi- repair, so that the regular quadrangle that side length is 2R is formed between four reparation wells,
Again in one reparation well of center setting on positive four side；
1c) arrange that other repair well successively according to the method for step 1b), so that the intersection covering of all circles is quasi- to repair place, institute
It states circle to refer to centered on repairing well, radius is the circle for repairing radius R.
9. a kind of aeration zone contaminated soil original position as claimed in claim 8 anaerobic organism restorative procedure, which is characterized in that also wrap
Include step 1d) monitoring well is laid, laying monitoring well includes: to lay monitoring well in the points of tangency of any two circle.
10. a kind of aeration zone contaminated soil original position as claimed in claim 8 anaerobic organism restorative procedure, which is characterized in that institute
State determine repair radius R method are as follows: in paraprotehetic place build one repair well, around the reparation well at equal intervals 1m according to
The secondary multiple monitoring wells of laying, past reparation well continuous injection compressed nitrogen 10 ~ after sixty minutes, monitor the dissolution nitrogen gas concn of well water
It can rise to a distance from the monitoring well farthest from reparation well of 1mg/L or more and be determined as repairing radius R.
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| CN115232625A (en) * | 2021-09-30 | 2022-10-25 | 黄芸 | Treatment method and application of soil organic pollutants |
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| CN114226449A (en) * | 2021-11-29 | 2022-03-25 | 辽宁中博生态环境技术有限公司 | Soil gas phase diffusion remediation and treatment method for volatile organic contaminated soil |
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