CN109821888A - A kind of aeration zone contaminated soil biology in situ renovation method - Google Patents
A kind of aeration zone contaminated soil biology in situ renovation method Download PDFInfo
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- CN109821888A CN109821888A CN201910071278.0A CN201910071278A CN109821888A CN 109821888 A CN109821888 A CN 109821888A CN 201910071278 A CN201910071278 A CN 201910071278A CN 109821888 A CN109821888 A CN 109821888A
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- aeration zone
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Abstract
The present invention provides a kind of aeration zone contaminated soil biology in situ renovation method, 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, it is successively aerated to be rapidly achieved after repairing effect can inject aerobe microbial inoculum in repairing well, complete the reparation of aeration zone contaminated soil, aeration zone contaminated soil in well reparation radius is repaired by being aerated quickly to diffuse to aerobic biological bacteria, realize the purpose for quickly repairing aeration zone contaminated soil, pass through the laying to well is repaired simultaneously, it can clearly determine recoverable region.
Description
Technical field
The present invention relates to a kind of aerated zone soil pollutant abatement technologies, and in particular to a kind of aeration zone contaminated soil is raw in situ
Object 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.
Patent document CN104607460A provides a kind of biological renovation method of organic material contaminated soil, and this method is main
It is broken including stirring soil；Organic fertilizer and nutriment are added into soil and is uniformly mixed；Water is added to adjust the wet of soil
Degree；Special highly effective microorganism, catalyst and surfactant is added；Aeration aerating is carried out to soil, while tail gas is collected
Processing；Regular sample detection.This method belongs to the biological renovation method of dystopy, and rehabilitation cost is high.
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.What this method can be handled
Pollution depth is limited；It is cumbersome, it is difficult to promote the use of a large area；Since contaminated soil is solid phase, it is uneven to there is processing.
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 biology in situ reparation
Method, the biological renovation method is by being full of aeration zone contaminated soil using ground sweat mode within the scope of Polluted area
Water, and reparation well is laid, it is successively aerated, completes to be rapidly achieved after repairing effect can inject aerobe microbial inoculum in repairing well
The reparation of aeration zone contaminated soil repairs aeration zone in well reparation radius by being aerated quickly to diffuse to aerobic biological bacteria
Contaminated soil realizes the purpose for quickly repairing aeration zone contaminated soil, while by the laying to well is repaired, can be clear
Determine recoverable region.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of aeration zone contaminated soil biology in situ renovation method, which comprises the steps of:
1) aeration zone contaminated soil in Polluted area is made to be full of water by way of ground sweat；
2) it is laid in the region for completing ground sweat and repairs gang of wells；
3) the pressurization injection aerobe microbial inoculum in repairing well；
4) it successively recycles and is aerated to repairing well in turn, until aeration zone contaminated soil and its to be full of water up to standard.
The mode of described ground sweat includes: to carry out vertical seepage control, depth to groundwater level on quasi- place boundary of repairing；
One or more seepage pits are dug out within the scope of vertical seepage control；Aerobe microbial inoculum toward after seepage pit injected clear water or clear water dilution,
And 20 ~ 50cm liquid level is maintained, so that aeration zone contaminated soil is full of water in Polluted area.
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.
The aerobe microbial inoculum need to be screened in advance, be tamed, and have good biological degradation effect to the pollutant of quasi- improvement.
Successively recycle be aerated to reparation well in turn in step 4) and refer to: arbitrarily choosing N number of reparation well is one group, is used
Air compressor or pressure gas tank are aerated in turn, and preceding a bite repairs well injecting compressed air or oxygen is aerated 10 ~ 50 points
Clock, interval 10 ~ 50 minutes, after the completion of interval, lower a bite repairs well and starts to be aerated, and N number of reparation well starts after completing a wheel
The circulation of next round.
The laying is repaired well 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.
A kind of aeration zone contaminated soil biology in situ renovation method, which is characterized in that further include step 1d) it lays
Monitoring 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, toward reparation well continuous injection compressed air or after oxygen 10 ~ 50 minutes, aeration zone soil
Earth, which is full of water dissolved oxygen and can rise to 2 ~ 10mg/L or more, to be determined as repairing radius with a distance from the farthest monitoring well of well from repairing
R。
The monitoring well of laying includes: to lay monitoring well in the points of tangency of any two circle.
Compared with the prior art, the advantages of the present invention are as follows:
1) the technical program uses the contaminated soil original position aerobic biological process for treating 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 can be not only used for injection aerobe microbial inoculum using well is repaired, and for injecting compression air or oxygen.
The aerobe bacterium raised growth breeding of indigenous aerobe bacterium or injection degrades pollutant in contaminated soil.Recoverable packet
Gas band 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 well 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 biology in situ renovation method, includes the following steps:
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) bacterium solution after injected clear water or clear water dilute in seepage pit, and about 20 ~ 50cm liquid level is maintained, so that packet in Polluted area
Gas band contaminated soil is full of water；
4) well is repaired in construction one in paraprotehetic place, repairs well depth to vertical seepage control depth.Around the reparation well etc.
Interval 1m successively lays multiple monitoring wells, and monitoring well depth is consistent with well depth is repaired.Toward reparation well continuous injection compressed air
Or after oxygen 10 ~ 50 minutes, the dissolved oxygen for monitoring well water can rise to the monitoring farthest from reparation well of 2 ~ 10mg/L or more
The distance of well is determined as repairing radius R；
5) it is laid in seepage pit region and repairs gang of wells, repair well depth to vertical seepage control depth.Repair gang of wells 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 Polluted area repaired required for intersection covering.Monitoring well can be laid in the points of tangency of any two circle, monitor well depth
To vertical seepage control depth；
7) to be rapidly achieved repairing effect, water pump can be used to every mouth and repair well pressurization injection certain amount aerobe bacterium
Agent.The aerobe microbial inoculum must be screened in advance, be tamed, and have good biological degradation effect to the pollutant of quasi- improvement；
8) arbitrarily choosing N number of reparation well is one group, is aerated in turn using air compressor or pressure gas tank, every mouth is repaired
Multiple well injecting compressed air or oxygen are aerated 10 ~ 50 minutes, interval 10 ~ 50 minutes.J1 is aerated 10 ~ 50 minutes, 10 ~ 50 points of interval
Zhong Hou, J2 are aerated 10 ~ 50 minutes, and after 10 ~ 50 minutes, J3 starts to be aerated interval, is so aerated in turn, until JN。JNAeration 10 ~
50 minutes, after 10 ~ 50 minutes, J1 started to be aerated interval.The such cyclic aeration of N number of reparation well；
9) the quasi- pollution administered of aerobe bacterium raised growth breeding degradation of indigenous aerobe bacterium or injection in contaminated soil
Object, until contaminated soil is up to standard.
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) bacterium solution after injected clear water or clear water dilute in seepage pit, and about 20cm liquid level is maintained, so that packet gas in Polluted area
Band contaminated soil is full of water；
4) within the scope of vertical seepage control according to shown in Fig. 1, lay and repair well J1, J2, J3...J9, lay monitoring well H1, H2, H3 and
H4, reparation radius are 1.5m, and repairing well and monitoring well depth is 6m；
5) J1 repaired well continuous injection air after 30 minutes, and distance J1 can be made to repair packet gas in the H1 monitoring well outside well 1.5m
Band soil is full of water dissolved oxygen and rises to 5mg/L；
6) well pressurization injection 30kg aerobe microbial inoculum is repaired to every mouth using water pump.The aerobe microbial inoculum must be sieved in advance
Choosing, domestication, have good biological degradation effect to the pollutant of quasi- improvement；
7) this nine mouthfuls of reparation wells are aerated in turn using an air compressor, every mouth is repaired well injecting compressed air and exposed
Gas 30 minutes, interval 20 minutes.J1 is aerated 30 minutes, and J2 starts aeration 30 minutes to interval after twenty minutes, interval 20 minutes；So
It is aerated in turn, until J9.J9 is aerated 30 minutes, and J1 starts to be aerated interval after twenty minutes.9 such cyclic aerations of reparation well until
Aeration zone contaminated soil and its until being full of water water quality reaching 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) bacterium solution after injected clear water or clear water dilute in seepage pit, and about 30cm liquid level is maintained, so that packet gas in Polluted area
Band contaminated soil is full of water；
4) within the scope of vertical seepage control according to shown in Fig. 1, lay and repair well J1, J2, J3...J9, lay monitoring well H1, H2, H3 and
H4, reparation radius are 2m, and repairing well and monitoring well depth is 9m；
5) J1 repairs well continuous injection air after forty minutes, and distance J1 can be made to repair aeration zone in the H1 monitoring well outside well 2m
Soil is full of water dissolved oxygen and rises to 5mg/L；
6) well pressurization injection 50kg aerobe microbial inoculum is repaired to every mouth using water pump.The aerobe microbial inoculum must be sieved in advance
Choosing, domestication, have good biological degradation effect to the pollutant of quasi- improvement；
7) this nine mouthfuls of reparation wells are aerated in turn using an air compressor, every mouth is repaired well injecting compressed air and exposed
Gas 40 minutes, interval 15 minutes.J1 is aerated 40 minutes, and J2 starts aeration 40 minutes after interval 15 minutes, interval 15 minutes；So
It is aerated in turn, until J9.J9 is aerated 40 minutes, and J1 starts to be aerated after interval 15 minutes.Nine mouthfuls of such cyclic aerations of reparation well are straight
Until to aeration zone contaminated soil and its being full of water water quality reaching 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 (9)
1. a kind of aeration zone contaminated soil biology in situ renovation method, which comprises the steps of:
1) aeration zone contaminated soil in Polluted area is made to be full of water by way of ground sweat；
2) it is laid in the region for completing ground sweat and repairs gang of wells；
3) the pressurization injection aerobe microbial inoculum in repairing well；
4) it successively recycles and is aerated to repairing well in turn, until aeration zone contaminated soil and its to be full of water up to standard.
2. a kind of aeration zone contaminated soil biology in situ renovation method as described in claim 1, which is characterized in that the ground
The mode of infiltration includes: to carry out vertical seepage control, depth to groundwater level on quasi- place boundary of repairing；Within the scope of vertical seepage control
Dig out one or more seepage pits；Aerobe microbial inoculum toward after seepage pit injected clear water or clear water dilution, and maintain 20 ~ 50cm liquid
Face, so that aeration zone contaminated soil is full of water in Polluted area.
3. a kind of aeration zone contaminated soil biology in situ renovation method as claimed in claim 2, which is characterized in that repair well depth
Spend, the specification of the seepage pit consistent with vertical seepage control depth are as follows: 0.5 ~ 1.0m is deep.
4. a kind of aeration zone contaminated soil biology in situ renovation method as described in claim 1, which is characterized in that described aerobic
Bacteria agent need to be screened in advance, be tamed, and have good biological degradation effect to the pollutant of quasi- improvement.
5. a kind of aeration zone contaminated soil biology in situ renovation method as described in claim 1, which is characterized in that in step 4)
Successively recycle be aerated to reparation well in turn and refer to: arbitrarily choosing N number of reparation well is one group, uses air compressor or pressure
To hold gas tank to be aerated in turn, preceding a bite repairs well injecting compressed air or oxygen is aerated 10 ~ 50 minutes, interval 10 ~ 50 minutes,
After the completion of interval, lower a bite repairs well and starts to be aerated, N number of circulation repaired well and complete beginning next round after a wheel.
6. a kind of aeration zone contaminated soil biology in situ renovation method as described in claim 1, which is characterized in that the laying
Well is repaired 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.
7. a kind of aeration zone contaminated soil biology in situ renovation method as claimed in claim 6, which is characterized in that further include step
Rapid 1d) lay monitoring well.
8. a kind of aeration zone contaminated soil biology in situ renovation method as claimed in claim 6, which is characterized in that the determination
The method for repairing radius R are as follows: build one in paraprotehetic place and repair well, 1m is successively laid at equal intervals around the reparation well
Multiple monitoring wells, toward reparation well continuous injection compressed air or after oxygen 10 ~ 50 minutes, aerated zone soil is full of water dissolved oxygen energy
It rises to a distance from the monitoring well farthest from reparation well of 2 ~ 10mg/L or more and is determined as repairing radius R.
9. a kind of aeration zone contaminated soil biology in situ renovation method as claimed in claim 7, which is characterized in that the laying
Monitoring well includes: to lay monitoring well in the points of tangency of any two circle.
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