CN109292974A - A kind of underground water and water-bearing layer soil in-situ anaerobic organism restorative procedure - Google Patents
A kind of underground water and water-bearing layer soil in-situ anaerobic organism restorative procedure Download PDFInfo
- Publication number
- CN109292974A CN109292974A CN201811503626.9A CN201811503626A CN109292974A CN 109292974 A CN109292974 A CN 109292974A CN 201811503626 A CN201811503626 A CN 201811503626A CN 109292974 A CN109292974 A CN 109292974A
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- well
- water
- underground water
- bearing layer
- anaerobic organism
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Abstract
The present invention provides a kind of underground water and water-bearing layer soil in-situ anaerobic organism restorative procedure, which repairs well by laying, and nutriment is injected in repairing well, or double as electron donor, the electron donors such as sulfate or nitrate of supplement filling when necessary.Reinject the anaerobic organism bacterium tamed, quickly nutriment, electron donor or anaerobic organism bacterium are diffused to by injection compressed gas and repaired in well reparation radius, realize that quick anaerobic organism repairs the purpose of underground water and water-bearing layer 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 underground water and water-bearing layer soil
Anaerobic organism restorative procedure in situ.
Background technique
Underground water and water-bearing layer soil in-situ bioremediation technology are by microorganism in underground water and water-bearing layer soil
Pollutant is transformed into the recovery technique of innocuous substance by the biodegradation of organic pollutant.Microorganism is by being directly metabolized
Or co -metabolic degradation organic pollutant, organic pollutant degradation is the lower pollutant of toxicity or is thoroughly degraded to carbon dioxide
And water.Biology in situ recovery technique can be divided into aerobe recovery technique and original in situ by the aerobic or anaerobism characteristic of biological bacteria
Position anaerobic organism recovery technique.The pollutants such as carbon tetrachloride, chloroform, tetrachloro-ethylene and trichloro ethylene are difficult to drop by aerobe
Solution, but anaerobic biodegradation can be passed through.
Environmental Protection Agency is in " Engineered Approaches to In Situ Bioremediation of
Chlorinated Solvents:Fundamentals and Field Applications " (EPA 542-R-00-008,
2000 revised of July) dynamic circulation well In-situ Bioremediation Technology of Contaminated Groundwater is discussed in a book.The technology is in underground water
Extraction well is laid in upstream, will come after adding nutriment or microbial inoculum by ground installation on the groundwater extraction of pollution, is recycled into
In the reinjection well that underground water downstream is laid, groundwater dynamic circulation is formed.After microorganism in underground water will obtain nutriment
Growth and breeding is with degradable organic pollutant.This technology is the disadvantage is that being difficult to determine the underground water model that dynamic circulation well can be repaired
It encloses；Additionally needing will be handled on groundwater extraction, and energy consumption is higher, and the ground installation investment of required construction is larger.
In addition, this book does not discuss how underground water injector well is laid out in the plane.
Summary of the invention
In order to solve the problems in the existing technology, the present invention provides a kind of underground water and water-bearing layer soil in-situ anaerobism
Biological renovation method.The biological renovation method repairs well by laying, and injects nutriment in repairing well, fills sulphur when necessary
The electron donors such as hydrochlorate or nitrate can reinject the anaerobic organism bacterium tamed, and pass through injection compressed nitrogen, argon gas or dioxy
Change carbon aeration quickly to diffuse in reparation well reparation radius nutriment, electron donor or anaerobic organism bacterium, realize fast
Fast anaerobic organism repairs the purpose of underground water and water-bearing layer soil, while by the laying to well is repaired, can clearly determine
Recoverable region.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of underground water and water-bearing layer soil in-situ anaerobic organism restorative procedure, which comprises the steps of:
1) it lays and repairs well gang of wells；
2) the pressurization injection nutriment in repairing well；
3) the anaerobic organism bacterium that underground water and water-bearing layer soil target contaminant have been tamed is reinjected in repairing well；
4) the intermittent low dose of injection nutriment of every mouthful of reparation well, so that underground water nutrient concentrations reach 2mg/L or more,
Continuous service is until underground water and water-bearing layer soil are up to standard.
In repairing well when pressurization injection nutriment, also pressurization injection sulfate or nitrate are supplied as electronics when necessary
Body.
In step 2,3), 4) in after injected material, have and inject gas by repairing well injected material is made to diffuse to week
The step of side underground reservoir.
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, further include step 1d) lay monitoring well.
The determining method for repairing radius R are as follows: build one in paraprotehetic underground water place and repair well, in the reparation
2m successively lays multiple monitoring wells at equal intervals around well, toward after repairing well continuous injection compressed nitrogen 30 ~ 90 minutes, in underground water
Dissolution 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.
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 groundwater remediation well in the technical program, which is both used to pressurize, injects the battalion such as lactate, acetate, vegetable oil or molasses
It supports substance (or doubling as electron donor), the electron donors such as sulfate or nitrate and anaerobic organism bacterium, and for injection of pressurizeing
The above substance is quickly quickly diffused to that the underground water for repairing well periphery contains by the inert gases such as compressed nitrogen, argon gas or carbon dioxide
In water layer.The breeding of anaerobic organism bacterium raised growth degrades pollutant, has reached quick reparation underground water and water-bearing layer soil
Purpose;
2) dynamic circulation well In-situ Bioremediation Technology of Contaminated Groundwater is difficult to determine the underground water that each pair of dynamic circulation well can be repaired
Range, the present invention can be apparent centered on clear groundwater remediation well, and radius is that the intersection of the circle of reparation radius covers
The underground water pollution region of required reparation.In addition dynamic circulation well In-situ Bioremediation Technology of Contaminated Groundwater needs to take out underground water
It is brought up and is handled, energy consumption is higher, and the ground installation investment of required construction is larger.This technology is without building at the surface water
Manage facility.
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 underground water and water-bearing layer soil in-situ anaerobic organism restorative procedure are repaired using well is repaired, including such as
Lower step:
1) well J1 is repaired in construction flatly in paraprotehetic underground water place, is at equal intervals being 2m from well 2m, 4m, 6m... is repaired
Monitoring well is laid, maximum distance is usually no more than 20m.Toward after repairing well J1 continuous injection compressed nitrogen 30 ~ 90 minutes, underground water
Dissolution nitrogen 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.
2) groundwater remediation well distribution method is as shown in Figure 1, distance is on the position of 2R on repairing well J1 arbitrary orientation
It lays and repairs well J2, using J1 and J2 as vertex, construct a positive square.In other two vertex position of this positive square
It lays and repairs well J7 and reparation well J8；It is laid in the center of this positive square and repairs well J4.Actually four reparation wells
Centered on J1, J2, J7 and J8, four circles that reparation radius is R are tangent, and the geometric center in the gap that centre is formed is the 5th and repairs
The position of multiple well J4.
3) other are according to said method laid successively and repairs well, so that all centered on repairing well, radius is to repair radius
The underground water pollution region repaired required for round intersection covering.Underground water prison can be laid in the points of tangency of any two circle
Well logging monitors groundwater remediation effect.
4) well pressurization injection certain amount lactate, acetate, vegetable oil or molasses etc. are repaired to every mouth using water pump
Nutriment (or doubling as electron donor), and well is repaired by every mouth and injects compressed nitrogen, argon gas or carbon dioxide quickly handle
Nutriment quickly diffuses in the aquifer for repairing well periphery.It is certain that well pressurization injection is repaired to every mouth when necessary
The electron donors such as quantity sulfate or nitrate, and it is quick by inert gases such as injection compressed nitrogen, argon gas or carbon dioxide
Sulfate or nitrate are quickly diffused in the aquifer for repairing well periphery.
5) to be rapidly achieved repairing effect, water pump can be used and repair well pressurization injection certain amount anaerobism life to every mouth again
Object microbial inoculum.The anaerobic organism microbial inoculum must be screened in advance, be tamed, and have good biological degradation effect to the pollutant of quasi- improvement.It is logical
The inert gases such as every mouth reparation well injection compressed nitrogen, argon gas or carbon dioxide are crossed quickly to quickly diffuse to anaerobic organism bacterium
In the aquifer for repairing well periphery.
6) nutriments such as every mouthful of reparation well indirect type low dose pressurization injection lactate, acetate, vegetable oil or molasses
(or doubling as electron donor), and make nutriment quick by inert gases such as injection compressed nitrogen, argon gas or carbon dioxide
Diffusion, so that underground water nutrient concentrations reach 2mg/L or more.
7) the anaerobic organism bacterium raised growth breeding degradation of indigenous anaerobic organism bacterium or injection is quasi- in aquifer controls
The pollutant of reason, until underground water and water-bearing layer soil are up to standard.
Specific embodiment is provided below
Embodiment 1
1) as shown in Figure 1, laying groundwater remediation well J1, J2, J3...J9, groundwater monitoring well H1, H2, H3 and H4 is laid, is repaired
Multiple radius is 8m；
2) J1 repaired well continuous injection compressed nitrogen after 30 minutes, and distance J1 can be made to repair the H1 monitoring well underground outside well 8m
Water dissolution nitrogen rises to 1mg/L；
3) 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 aquifer for repairing well periphery.
4) well pressurization injection 100L anaerobic organism bacterium solution is repaired to every mouth using water pump, continuous injection compressed nitrogen 30 divides
Clock quickly diffuses to anaerobic organism microbial inoculum in the aquifer for repairing well periphery.
5) it after every mouth reparation well is injected sodium lactate saturated solution 30 minutes with the flow persistent pressure of 100L per hour, holds
Continuous injection compressed nitrogen 30 minutes, then 12 hours repressurizations of interval inject sodium lactate.So circulation, groundwater monitoring well H1,
Lactic acid na concn maintains 2mg/L or more in H2, H3 and H4.Until underground water and water-bearing layer soil are up to standard.
Embodiment 2
1) as shown in Figure 1, laying groundwater remediation well J1, J2, J3...J9, groundwater monitoring well H1, H2, H3 and H4 is laid, is repaired
Multiple radius is 12m；
2) J1 repaired well continuous injection compressed nitrogen after 50 minutes, can make distance J1 with repairing the H1 monitoring well outside well 12m
It is lauched dissolution nitrogen and rises to 1mg/L；
3) 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 aquifer for repairing well periphery.
4) well pressurization injection 150L anaerobic organism bacterium solution is repaired to every mouth using water pump, continuous injection compressed nitrogen 50 divides
Clock quickly diffuses to anaerobic organism microbial inoculum in the aquifer for repairing well periphery.
5) it after every mouth reparation well is injected sodium lactate saturated solution 30 minutes with the flow persistent pressure of 200L per hour, holds
Continuous injection compressed nitrogen 50 minutes, then 12 hours repressurizations of interval inject sodium lactate.So circulation, groundwater monitoring well H1,
Lactic acid na concn maintains 2mg/L or more in H2, H3 and H4.Until underground water and water-bearing layer soil are 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 underground water and water-bearing layer soil in-situ anaerobic organism restorative procedure, which comprises the steps of:
1) it lays and repairs well gang of wells；
2) the pressurization injection nutriment in repairing well；
3) the anaerobic organism bacterium that underground water and water-bearing layer soil target contaminant have been tamed is reinjected in repairing well；
4) the intermittent low dose of injection nutriment of every mouthful of reparation well, so that underground water nutrient concentrations reach 2mg/L or more,
Continuous service is until underground water and water-bearing layer soil are up to standard.
2. a kind of underground water as described in claim 1 and water-bearing layer soil in-situ anaerobic organism restorative procedure, which is characterized in that
In repairing well when pressurization injection nutriment, also pressurization injection sulfate or nitrate is as electron donor when necessary.
3. a kind of underground water as claimed in claim 2 and water-bearing layer soil in-situ anaerobic organism restorative procedure, which is characterized in that
In step 2,3), 4) in after injected material, have and circumferentially contained down by repairing well and injecting gas and diffuse to injected material
The step of water layer.
4. a kind of underground water as claimed in claim 3 and water-bearing layer soil in-situ anaerobic organism restorative procedure, which is characterized in that
The nutriment is lactate, acetate, vegetable oil or molasses, the nutriment or also serves as electron donor.
5. a kind of underground water as claimed in claim 3 and water-bearing layer soil in-situ anaerobic organism restorative procedure, which is characterized in that
The gas is nitrogen, argon gas or the carbon dioxide of compression.
6. a kind of underground water as claimed in claim 3 and water-bearing layer soil in-situ anaerobic organism restorative procedure, which is characterized in that
The reparation well, which is not only used to pressurize, injects nutriment and anaerobic organism bacterium, but also for the injection gas that pressurizes.
7. a kind of underground water as described in claim 1 and water-bearing layer soil in-situ anaerobic organism restorative procedure, which is characterized in that
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.
8. a kind of underground water as claimed in claim 7 and water-bearing layer soil in-situ anaerobic organism restorative procedure, which is characterized in that
Further include step 1d) lay monitoring well.
9. a kind of underground water as claimed in claim 7 and water-bearing layer soil in-situ anaerobic organism restorative procedure, which is characterized in that
The determining method for repairing radius R are as follows: build one in paraprotehetic underground water place and repair well, around the reparation well etc.
Interval 2m successively lays multiple monitoring wells, and toward after repairing well continuous injection compressed nitrogen 30 ~ 90 minutes, nitrogen is dissolved in underground water
Concentration 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.
10. a kind of underground water as claimed in claim 8 and water-bearing layer soil in-situ anaerobic organism restorative procedure, feature exist
In the monitoring well of laying includes: to lay monitoring well in the points of tangency of any two circle.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114632809A (en) * | 2022-03-18 | 2022-06-17 | 中国科学院南京土壤研究所 | Risk control method for polluted site and in-situ risk control domain of polluted site |
| CN114653737A (en) * | 2022-04-02 | 2022-06-24 | 北京博诚立新环境科技股份有限公司 | In-situ chemical reduction and enhanced biological combined remediation method for hexavalent chromium contaminated soil and underground water |
| CN117602742A (en) * | 2023-12-15 | 2024-02-27 | 广东省环境科学研究院 | Groundwater pollution restoration system and restoration method |
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| CN109292974B (en) | 2022-03-29 |
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