CN109365522A - A method of the reparation of contaminated soil anaerobic organism is carried out using bioreactor - Google Patents
A method of the reparation of contaminated soil anaerobic organism is carried out using bioreactor Download PDFInfo
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- CN109365522A CN109365522A CN201811502936.9A CN201811502936A CN109365522A CN 109365522 A CN109365522 A CN 109365522A CN 201811502936 A CN201811502936 A CN 201811502936A CN 109365522 A CN109365522 A CN 109365522A
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- bioreactor
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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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Abstract
The present invention provides a kind of method for carrying out the reparation of contaminated soil anaerobic organism using bioreactor, the restorative procedure passes through construction contaminated soil anaerobic biological reactor, anaerobic organism reaction is carried out by medium of water, it injects the nutriments such as lactate, acetate, vegetable oil or molasses or doubles as electron donor, 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；Nutriment, electron donor or anaerobic organism bacterium are quickly diffused to entire bioreactor by injection compressed nitrogen, argon gas or carbon dioxide, realize the purpose of quick anaerobic organism repairing polluted soil.Compared to the biological renovation method of solid phase, repairing efficiency is short, and repairing effect is uniform, and is not necessarily to the pretreatment such as sieve contaminated soil, be crushed and stirred, and greatly reduces pretreatment project amount.
Description
Technical field
The present invention relates to a kind of contaminated soil Treatment process, and in particular to a kind of to be polluted using anaerobic biological reactor
The method of soil remediation.
Background technique
Organic polluted soil recovery technique mainly includes chemical remediation technology, thermal desorption technology and bioremediation technology.Change
It learns recovery technique and thermal desorption technology has the higher disadvantage of cost of disposal.Bioremediation technology is as a kind of high-efficiency and economic
Recovery technique has been applied to organic polluted soil reparation.Contaminated soil bioremediation technology is by microorganism in soil
Pollutant is transformed into the recovery technique of innocuous substance by the biodegradation of organic pollutant.Microorganism is organic by clearing up
Pollutant provides nutrient and energy needed for itself, organic pollutant is decomposed into carbon dioxide and water.
Whether bioremediation technology is by adding the biological bacteria of domestication and can be divided into two kinds: the first is by stimulation soil
The growth and breeding of indigenous microorganism carry out degradable organic pollutant, it is by the way that electronics is added to soil that stimulation indigenous microorganism, which is grown,
Donor (be suitable for anaerobic organism bacterium) or electron acceptor (being suitable for aerobe bacterium) and nutriment are realized.Usually
The electron donor of addition includes lactate, the vegetable oil of emulsification or molasses etc., and electron acceptor includes air, oxygen or oxygen release
Compound etc..Second is that external artificial culture is added to soil to tame specific microorganism, while also electron injection donor
Or electron acceptor, nutriment, promote the growth and breeding of microorganism.Second method is known as bioremediation technology.
Bioremediation technology can be divided into aerobe recovery technique by the aerobic or anaerobism characteristic of biological bacteria and anaerobism is raw
Object recovery technique.The pollutants such as carbon tetrachloride, chloroform, tetrachloro-ethylene, trichloro ethylene, hexachloro-benzene and Polychlorinated biphenyls are difficult by good
Oxygen biodegrade, but anaerobic biodegradation can be passed through.
Facilities engineering service centre of USN (Naval Facilities Engineering Service Center)
Discussed in publication " BIOPILE DESIGN AND CONSTRUCTION MANUAL " technical manual in 1996, handbook as
What designs and builds biological heap for handling petroleum hydrocarbon contaminated soil.This method mainly includes site preparation, the building of heap body and heap
Body regulation；Nutriment is added to contaminated soil and is uniformly mixed；Water is added to adjust the humidity of soil；Specified microorganisms are added；It is right
Soil heap body carries out positive pressure or negative pressure oxygenation.This biological heap technology belongs to aerobe recovery technique, and contaminated soil is at solid phase
It is uneven to there is processing in reason, and repairing efficiency is longer.
Patent document CN102225420A provides a kind of restorative procedure of chlorinatedorganic contaminated soil difficult to degrade, the hair
Bright to repair by the way of static pile composting to contaminated soil, this method mainly includes site preparation, the building of heap body
Regulate and control with heap body, is incorporated a certain amount of soil conditioner improvement soil first；Recycle barrier film, drip irrigation hose and the upper half
Perforated pipe constructs a relatively controllable composting environment；Heap body state is adjusted finally by modes such as recharge, aerations, is detested with reaching
The effect of the aerobic alternately composting of oxygen-.Soil moisture is adjusted to maximum soil and held by the method using uniformly being watered to heap body
Water, and the technological means that heap body integrally covers is reached to barrier film the requirement of anaerobic environment.Contaminated soil in the method
It is still solid phase processing, it is uneven there is processing, and repairing efficiency is longer；Additionally, due to for pouring in the water for spilling heap body containing dissolution
Oxygen is extremely difficult to the requirement of strictly anaerobic environment.
Summary of the invention
In order to solve the problems in the existing technology, the present invention provides a kind of is polluted using anaerobic biological reactor
The method of soil remediation, the restorative procedure carry out anaerobism life by construction contaminated soil anaerobic biological reactor, by medium of water
Object reaction.The nutriments such as lactate, acetate, vegetable oil or molasses (or doubling as electron donor) is injected, supplement adds when necessary
Infuse the electron donors such as sulfate or nitrate；To be rapidly achieved repairing effect, the anaerobic organism bacterium tamed can be reinjected；Pass through
Nutriment, electron donor or anaerobic organism bacterium are quickly diffused to entire biology by injection compressed nitrogen, argon gas or carbon dioxide
Reactor realizes the purpose of quick anaerobic organism repairing polluted soil.
The purpose of the present invention is what is be achieved through the following technical solutions:
A method of the reparation of contaminated soil anaerobic organism is carried out using bioreactor, which comprises the steps of:
1) bioreactor is built, which includes pond body, and pool bottom is equipped with screen casing of the tube body with micropore；
2) contaminated soil is put into pond body, makes contaminated soil in liquid phase state by screen casing pressurization injection clean water；
3) it is pressurizeed by screen casing and injects nutriment；
4) the anaerobic organism microbial inoculum that target contaminant has been tamed by screen casing injection needle；
5) by the intermittent low dose of injection nutriment of screen casing, so that nutrient concentrations maintain in bioreactor water
2mg/L or more, oxidation-reduction potential in -100mV hereinafter, such continuous service, until contaminated soil is up to standard.
When through screen casing pressurization injection nutriment, also pressurization injection sulfate or nitrate are supplied as electronics when necessary
Body.
In step 3), 4), 5) in gas injected by screen casing spread injected material by having after screen casing injected material
The step of to entire pond body.
It is specifically referred in step 5) by the intermittent low dose of injection nutriment of screen casing: by the intermittent reversed pumping of screen casing
A small amount of water in bioreactor is taken, after nutriment dissolution is added, in the injection biological reaction container that pressurizes by screen casing.
Further include step 6): reversely extracting the water in bioreactor out by screen casing, so that the water and soil in bioreactor
Separation.
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.
Filtrate is covered on the screen casing.
The filtrate is pure quartz sand, and pure quartz sand is matched with 5mm ~ 2cm partial size pole and cladding thickness is 30cm.
The screen casing is distributed along the length direction of pond body, and the screen casing is one or more, when screen casing is a plurality of, phase
Even the spacing between screen casing is 50-200cm.
Compared with existing geobiont repair technology, the present invention has the advantages that
1) the technical program uses the contaminated soil anaerobic bio-treated method of liquid phase, biological prosthetic as the liquid phase of medium using water
For method than the biological renovation method of solid phase, repairing efficiency is short, and repairing effect is uniform；It can efficient degradation carbon tetrachloride, chloroform, tetrachloro
Ethylene, trichloro ethylene, hexachloro-benzene and Polychlorinated biphenyls etc. are difficult to the pollutant of aerobic biodegradation.
2) this technology is not necessarily to the pretreatment such as sieve contaminated soil, be crushed and stirred, and greatly reduces pretreatment work
Cheng Liang.
Detailed description of the invention
Fig. 1 is the positive cross-sectional view of bioreactor in the method for the invention；
Fig. 2 is the A-A ' overhead sectional view of bioreactor in the method for the invention；
Fig. 3 is the B-B ' side sectional view of bioreactor in the method for the invention；
In figure: 1 contaminated soil, 2 blind pipes, 3 pond bodies, 4 screen casings, 5 filtrates.
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 method of the reparation of contaminated soil anaerobic organism, the biological respinse that this method uses are carried out using bioreactor
Device structure is as shown in Figure 1-3, including pond body 3, and the bottom of pond body 3 is laid with screen casing 4 along pond body length direction, according to pond body 3
Size, screen casing 4 can be one or a plurality of, and when screen casing 4 is a plurality of, the spacing control between adjacent screen casing 4 exists
50cm ~ 200cm range has micropore on screen casing 4, is covered with filtrate 5 on screen casing 4, and it is pure that filtrate 5 is that 5mm ~ 2cm partial size pole is matched
Quartz sand, the cladding thickness of pure quartz sand are 30cm.Screen casing 4 is connected in the outside of pond body 3 with blind pipe 2.Pollution to be processed
Soil 1 is shelved in pond body 3.
Method provided by the invention is the method for carrying out the reparation of contaminated soil anaerobic organism using above-mentioned bioreactor, tool
Body includes the following steps:
1) bioreactor is built, bioreactor includes pond body, and pool bottom is laid with screen casing, screen casing along pond body length direction
On have micropore, be covered with filtrate on screen casing；
2) contaminated soil is put into bioreactor pond body, makes it in liquid phase state by screen casing pressurization injection clean water；
3) it is pressurizeed the nutriments such as injection lactate, acetate, vegetable oil or molasses (or doubling as electron donor) by screen casing, and
Nutriment is quickly quickly diffused to entire bioreactor by gases such as injection compressed nitrogen, argon gas or carbon dioxide；
4) electron donors such as sulfate or nitrate of pressurization injection when necessary, and pass through injection compressed nitrogen, argon gas or titanium dioxide
Electron donor is quickly quickly diffused to entire bioreactor by the gases such as carbon；
5) to be rapidly achieved repairing effect, the anaerobic organism microbial inoculum tamed for target contaminant can be reinjected, and by blind
Anaerobic organism microbial inoculum is quickly quickly diffused to entire biology by the gases such as pipe and screen casing vasopressing injection nitrogen, argon gas or carbon dioxide
Reactor；
6) intermittent that a small amount of water in bioreactor is reversely extracted out by blind pipe and screen casing using water pump, sodium lactate dissolution is added,
Then it is injected in bioreactor using water pump by blind pipe and screen casing pressurization, it is subsequent that blind pipe and screen casing are passed through using compressor again
Sodium lactate is quickly diffused to entire bioreactor by the gases such as vasopressing injection nitrogen, argon gas or carbon dioxide, so that biology is anti-
Lactic acid na concn in device water is answered to maintain 2mg/L or more, oxidation-reduction potential is below -100mV.Such continuous service, weekly
A pollutant in soil index is detected, until contaminated soil is up to standard；
7) water in bioreactor is reversely extracted out by screen casing using water pump, so that the water and soil in anaerobic biological reactor point
From.The water of extraction, which stores, is back to the processing of next batch contaminated soil, or qualified discharge after processing.
Specific embodiment is provided below
Embodiment 1
1) build 100m(long) × 50m(wide) × 2m(high) armored concrete anaerobic biological reactor pond body, pool bottom edge
Pond body length direction lays screen casing, there is micropore on screen casing, between screen casing between be divided into 160cm, 5mm ~ 2cm partial size pole is covered on screen casing and is matched
Pure quartz sand 30cm.
2) contaminated soil is put into anaerobic biological reactor pond body, it is clear by blind pipe and screen casing pressurization injection using water pump
Clean water makes contaminated soil in liquid phase state.
3) blind pipe and screen casing pressurization injection 500L sodium lactate saturated solution are passed through using water pump；Blind pipe is passed through using compressor
It is injected compressed nitrogen 50 minutes with screen casing persistent pressure, sodium lactate is quickly quickly diffused to entire bioreactor.
4) the anaerobic organism microbial inoculum that target contaminant has been tamed by blind pipe and screen casing pressurization injection needle using water pump
500L；It is injected compressed nitrogen 50 minutes using compressor by blind pipe and screen casing persistent pressure, quickly bacteria agent is quickly expanded
It is dissipated to entire bioreactor.
5) anaerobic organism bacterium growth and breeding, degradable organic pollutant while, will consume sodium lactate.Every 24 hours, use
Water pump reversely extracts 100L water in bioreactor out by blind pipe and screen casing, and the dissolution of 5kg sodium lactate is added, then logical using water pump
It crosses in blind pipe and screen casing pressurization injection bioreactor.Compressed nitrogen is injected by blind pipe and screen casing persistent pressure using compressor
50 minutes, the sodium lactate newly injected is quickly quickly diffused to entire bioreactor, so that sodium lactate in bioreactor water
Concentration maintains 2mg/L or more, and oxidation-reduction potential is below -100mV.Such continuous service detects in a soil weekly
Pollutant index, until contaminated soil is up to standard.
6) water in bioreactor is reversely extracted out by blind pipe and screen casing using water pump, so that in anaerobic biological reactor
Water and soil separation.The water of extraction, which stores, is back to the processing of next batch contaminated soil or direct qualified discharge.
Embodiment 2
1) build 50m(long) × 40m(wide) × 1.5m(high) armored concrete anaerobic biological reactor pond body, pool bottom edge
Pond body length direction lays screen casing, there is micropore on screen casing, between screen casing between be divided into 100cm, 5mm ~ 2cm partial size pole is covered on screen casing and is matched
Pure quartz sand 30cm.
2) contaminated soil is put into anaerobic biological reactor pond body, it is clear by blind pipe and screen casing pressurization injection using water pump
Clean water makes contaminated soil in liquid phase state.
3) blind pipe and screen casing pressurization injection 300L sodium lactate saturated solution are passed through using water pump；Blind pipe is passed through using compressor
It is injected compressed nitrogen 50 minutes with screen casing persistent pressure, sodium lactate is quickly quickly diffused to entire bioreactor.
4) the anaerobic organism microbial inoculum that target contaminant has been tamed by blind pipe and screen casing pressurization injection needle using water pump
200L；It is injected compressed nitrogen 50 minutes using compressor by blind pipe and screen casing persistent pressure, quickly bacteria agent is quickly expanded
It is dissipated to entire bioreactor.
5) anaerobic organism bacterium growth and breeding, degradable organic pollutant while, will consume sodium lactate.Every 24 hours, use
Water pump reversely extracts 100L water in bioreactor out by blind pipe and screen casing, and the dissolution of 2kg sodium lactate is added, then logical using water pump
It crosses in blind pipe and screen casing pressurization injection bioreactor.Compressed nitrogen is injected by blind pipe and screen casing persistent pressure using compressor
50 minutes, the sodium lactate newly injected is quickly quickly diffused to entire bioreactor, so that sodium lactate in bioreactor water
Concentration maintains 2mg/L or more, and oxidation-reduction potential is below -100mV.Such continuous service detects in a soil weekly
Pollutant index, until contaminated soil is up to standard.
6) water in bioreactor is reversely extracted out by blind pipe and screen casing using water pump, so that in anaerobic biological reactor
Water and soil separation.The water of extraction, which stores, is back to the processing of next batch contaminated soil or direct qualified discharge.
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 method for carrying out the reparation of contaminated soil anaerobic organism using bioreactor, which is characterized in that including walking as follows
It is rapid:
1) bioreactor is built, which includes pond body, and pool bottom is equipped with screen casing of the tube body with micropore；
2) contaminated soil is put into pond body, makes contaminated soil in liquid phase state by screen casing pressurization injection clean water；
3) it is pressurizeed by screen casing and injects nutriment；
4) the anaerobic organism microbial inoculum that target contaminant has been tamed by screen casing injection needle；
5) by the intermittent low dose of injection nutriment of screen casing, so that nutrient concentrations maintain in bioreactor water
2mg/L or more, oxidation-reduction potential in -100mV hereinafter, such continuous service, until contaminated soil is up to standard.
2. a kind of method for carrying out the reparation of contaminated soil anaerobic organism using bioreactor as described in claim 1, special
Sign is that when through screen casing pressurization injection nutriment, also pressurization injection sulfate or nitrate are supplied as electronics when necessary
Body.
3. a kind of method for carrying out the reparation of contaminated soil anaerobic organism using bioreactor as claimed in claim 2, special
Sign is, in step 3), 4), 5) in gas injected by screen casing spread injected material by having after screen casing injected material
The step of to entire pond body.
4. a kind of method for carrying out the reparation of contaminated soil anaerobic organism using bioreactor as described in claim 1, special
Sign is, is specifically referred in step 5) by the intermittent low dose of injection nutriment of screen casing: by the intermittent reversed pumping of screen casing
A small amount of water in bioreactor is taken, after nutriment dissolution is added, in the injection biological reaction container that pressurizes by screen casing.
5. a kind of method for carrying out the reparation of contaminated soil anaerobic organism using bioreactor as described in claim 1, special
Sign is, further includes step 6): the water in bioreactor is reversely extracted out by screen casing, so that the water and soil in bioreactor point
From.
6. a kind of method for carrying out the reparation of contaminated soil anaerobic organism using bioreactor as claimed in claim 3, special
Sign is, the nutriment is lactate, acetate, vegetable oil or molasses, the nutriment or also serves as electron donor.
7. a kind of method for carrying out the reparation of contaminated soil anaerobic organism using bioreactor as claimed in claim 3, special
Sign is that the gas is nitrogen, argon gas or the carbon dioxide of compression.
8. a kind of method for carrying out the reparation of contaminated soil anaerobic organism using bioreactor as described in claim 1, special
Sign is, is covered with filtrate on the screen casing.
9. a kind of method for carrying out the reparation of contaminated soil anaerobic organism using bioreactor as claimed in claim 8, special
Sign is that the filtrate is pure quartz sand, and pure quartz sand is matched with 5mm ~ 2cm partial size pole and cladding thickness is 30cm.
10. a kind of method for carrying out the reparation of contaminated soil anaerobic organism using bioreactor as claimed in claim 8, special
Sign is that the screen casing is distributed along the length direction of pond body, and the screen casing is one or more, when screen casing is a plurality of, phase
Even the spacing between screen casing is 50-200cm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112139233A (en) * | 2020-09-15 | 2020-12-29 | 北京高能时代环境技术股份有限公司 | Intensified anaerobic remediation agent for chromium-polluted site, preparation method and use method |
| CN113102478A (en) * | 2021-04-22 | 2021-07-13 | 轻工业环境保护研究所 | Method for strengthening degradation of polycyclic aromatic hydrocarbon anoxic microorganisms in soil through heat treatment |
| CN113578945A (en) * | 2021-07-07 | 2021-11-02 | 温州大学 | Method for improving repair efficiency of molasses on chromium-contaminated soil |
| 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 |
| CN114850201A (en) * | 2022-05-26 | 2022-08-05 | 北京博诚立新环境科技股份有限公司 | In-situ bioremediation method for combined treatment of aeration zone and saturation zone |
| CN115232625A (en) * | 2021-09-30 | 2022-10-25 | 黄芸 | Treatment method and application of soil organic pollutants |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112139233A (en) * | 2020-09-15 | 2020-12-29 | 北京高能时代环境技术股份有限公司 | Intensified anaerobic remediation agent for chromium-polluted site, preparation method and use method |
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| CN112139233B (en) * | 2020-09-15 | 2022-04-19 | 北京高能时代环境技术股份有限公司 | Intensified anaerobic remediation agent for chromium-polluted site, preparation method and use method |
| CN113102478A (en) * | 2021-04-22 | 2021-07-13 | 轻工业环境保护研究所 | Method for strengthening degradation of polycyclic aromatic hydrocarbon anoxic microorganisms in soil through heat treatment |
| CN113578945A (en) * | 2021-07-07 | 2021-11-02 | 温州大学 | Method for improving repair efficiency of molasses on chromium-contaminated soil |
| CN115232625A (en) * | 2021-09-30 | 2022-10-25 | 黄芸 | Treatment method and application of soil organic pollutants |
| 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 |
| CN114850201A (en) * | 2022-05-26 | 2022-08-05 | 北京博诚立新环境科技股份有限公司 | In-situ bioremediation method for combined treatment of aeration zone and saturation zone |
| CN114850201B (en) * | 2022-05-26 | 2024-02-06 | 北京博诚立新环境科技股份有限公司 | In-situ bioremediation method for combined treatment of gas-coated belt and saturated belt |
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