CN104624638B - The dystopy microorganism remediation system and restorative procedure of petroleum-polluted soil - Google Patents
The dystopy microorganism remediation system and restorative procedure of petroleum-polluted soil Download PDFInfo
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Abstract
The present invention relates to a kind of dystopy microorganism remediation system of petroleum-polluted soil and restorative procedure, the system includes：1) the isolation bottom of laying on the ground；2) the one or more petroleum-polluted soil horizons being laid on the isolation bottom；3) it is laid on the horizontal porous aerophobic tube of one or more of described soil horizon；4) one or more vertical feeding pipes that the one end being laid in the soil horizon is in communication with the outside；5) it is laid on the isolation top layer of the top；6) exhaust system connected with one or more of porous aerophobic tubes of level.The repair system and restorative procedure of the present invention can reduce that cost of transportation, floor space are small, process cycle is short, repairing effect is good.
Description
Technical field
The present invention relates to a kind of dystopy microorganism remediation system of petroleum-polluted soil and restorative procedure.
Background technology
With developing rapidly for petroleum industry, the oil leakage accident of petroleum pipeline, oil storage cabin and oil storage tank etc. constantly increases
Add, contaminated soil scope is also significantly expanded, and petroleum pollution changes the organic matter composition of soil, destroys soil texture, draws
Soil soil property is played to deteriorate so as to heavy damage ecological environment.In addition, a large amount of carcinogenic, teratogenesis, mutagenesis are included in petroleum pollution
Harmful substance, can have a negative impact to health.Because petroleum pollution is difficult to pass through natural degradation mistake in soil
Journey removes, therefore can exist and accumulate for a long time in soil.
Existing contaminated soil treatment technology can be roughly divided into 4 classes：Physical Separation Technology, chemical treatment method, plant
Recovery technique, microorganism remediation technology.Physical Separation Technology is by carrying out excavation landfill (excavation landfill method) to polluted soil
Or polluted soil is isolated into (isolation method) so as to prevent pollutant from further migrating with surrounding environment, but can not be from
Substantially eliminate pollutant.Chemical treatment method is by being burned (chemical burning method) to polluted soil or using chemical washing
Agent washing polluted soil (chemical washing method) is so as to eliminate the pollutant in soil, although preferable oil removing effect can be obtained
Fruit, but soil texture and component, and costly and more difficult implementation can be destroyed by burning, and chemical washing method usedization
Learn detergent and further cause secondary pollution problem.Phytoremediation technology is using plant and its microorganism system removing coexists
The Treatment process of soil pollutant, although the technology cost is cheap, repair time is longer, and processing procedure is slow, it is impossible to repaiies
Answer all contaminated objects and just for topsoil.Microorganism remediation technology is using microbial degradation or removes having in soil
Organic pollutants, necessary condition is provided for the growth of microorganism and breeding using natural or microbe inoculation and by artificial measure,
Can be divided into in-situ treatment and dystopy processing, because microorganism remediation technology expense is low, effect is good, processing speed is high, into
For the recovery technique to receive much concern.
Chinese patent 201110129619.9 discloses comprehensive repair system in situ and the side of a kind of oil-polluted soils
Method, wherein the injection liquid comprising surfactant is injected into soil by injection well and the greasy dirt in soil is handled, pass through
The greasy dirt of processing extracts soil out by adjustable screen casing and suction tube, so as to remove the greasy dirt in soil.The method of the patent
Shortcoming is taking suction in the free phase and high concentration vapor phase contaminants that are only capable of being directed in soil, can not remove the dirt of other phases
Thing is contaminated, therefore its repairing effect is limited.
Chinese patent 200810223973.6 discloses a kind of technology and skill for controlling and removing oil pollutant in soil
Art device, wherein by drill into each layer of sand delamination pour slurry formed multiple oil separating plates so as to by oil pollutant layering every
Open, and disposed in drilling and osmos tube and construct oil collecting pipe, excavated near oil pollutant horizontal proliferation border water storage ditch from
And artificially manufacture and partly descend soil water flow field, make oil pollutant Soil Surrounding zone of saturation capillary difference force effect under to
Oil collecting pipe to move and be gathered in oil collecting pipe, then accelerate the degraded of oil pollutant by the oil degradation bacteria in oil collecting pipe
With removing.The shortcomings that method of the patent in enough capillary pressure differences must be established in soil so as to forcing oil pollutant
Lateral flow, it is preferred that emphasis is the soil that processing greasy dirt amount is big and greasy dirt concentration is high, be unfavorable for repairing by the chronic seepage of long-term greasy dirt
Caused pollution.
Therefore, it is necessary to a kind of method for the technical problem that can overcome prior art.
The content of the invention
The present invention relates to a kind of dystopy microorganism remediation system of petroleum-polluted soil, the system includes：
1) the isolation bottom of laying on the ground；
2) the one or more petroleum-polluted soil horizons being laid on the isolation bottom；
3) it is laid on the horizontal porous aerophobic tube of one or more of described soil horizon；
4) one or more vertical feeding pipes that the one end being laid in the soil horizon is in communication with the outside；
5) it is laid on the isolation top layer of the top；
6) exhaust system connected with one or more of porous aerophobic tubes of level.
According to a preferred embodiment of the invention, the isolation bottom is from the bottom to top by concrete layer, metalling, steel
Reinforced concrete plate and high density polyethylene (HDPE) geotextiles composition.
According to a preferred embodiment of the invention, enter from the bottom to top between the isolation bottom and the soil horizon
One step includes drainage blanket and sand bed.
According to a preferred embodiment of the invention, it is described isolation bottom with it is described isolate top layer prevent ambient atmos and
The interference of moisture, so as to maintain the temperature and humidity condition in the soil horizon.
According to a preferred embodiment of the invention, the repair system further comprises on the exhaust system
Steam piece-rate system, active carbon purifying system and the monitoring system of trip.
According to a preferred embodiment of the invention, the repair system further comprises and the vertical feeding Guan Lian
The control system connect, the vertical feeding pipe is controlled to feed by the control system.
Moreover, it relates to a kind of dystopy repairing method of microorganism of petroleum-polluted soil, methods described bag
Include following steps：
1) bottom is isolated in laying on the ground；
2) the one or more petroleum-polluted soil horizons of laying on the isolation bottom；
3) one or more horizontal porous aerophobic tubes are laid in the soil horizon；
4) one or more vertical feeding pipes that one end is in communication with the outside are laid in the soil horizon；
5) isolation top layer is laid in the top；
6) exhaust system connected in outside foundation with one or more of porous aerophobic tubes of level；
7) nutriment and water needed for microorganism and optional breeding are launched by the vertical feeding pipe；
8) caused steam and the waste gas comprising volatile oil and gas in the soil horizon is made to be dredged by the way that the level is porous
Tracheae is discharged via exhaust system.
According to a preferred embodiment of the invention, the isolation bottom is from the bottom to top by concrete layer, metalling, steel
Reinforced concrete plate and high density polyethylene (HDPE) geotextiles composition.
According to a preferred embodiment of the invention, enter from the bottom to top between the isolation bottom and the soil horizon
One step lays drainage blanket and sand bed.
According to a preferred embodiment of the invention, it is described isolation bottom with it is described isolate top layer prevent ambient atmos and
The interference of moisture, so as to maintain the temperature and humidity condition in the soil horizon.
According to a preferred embodiment of the invention, steam segregative line is further established in the exhaust system upstream
System, active carbon purifying system and monitoring system.The effect of steam piece-rate system is largely to reduce caused steam in each soil horizon
Into blower fan and follow-up active carbon purifying system, avoid system from inactivating, cause active carbon purifying system ineffective；The work
The effect of property carbon purifying system is " taste removal, oil removing "：The volatile oil and gas and pollution gas in discharge gas are removed, really
Protect final arrange to the gas of air and meet discharge standard；The effect of the monitoring system is：1st, control, supervised in the present invention at any time
The function situation of each critical piece and equipment, 2, monitoring pressure and temperature everywhere, 3, monitor the index situation of discharge gas.
According to a preferred embodiment of the invention, the control system being connected with the vertical feeding pipe is further established
System, the vertical feeding pipe is controlled to feed by the control system.
The present invention repair system and restorative procedure can reduce cost of transportation, floor space are small, process cycle is short, repair
Effect is good.
Brief description of the drawings
Fig. 1 is the schematic diagram according to the dystopy microorganism remediation system of the petroleum-polluted soil of the present invention.
Fig. 2 is display according to the micro- of the embodiment of the dystopy microorganism remediation system of the petroleum-polluted soil of the present invention
The chart of biological prosthetic result.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be described in detail.
With reference to figure 1, the dystopy microorganism remediation system 1 of petroleum-polluted soil of the invention includes：Isolation bottom 2,
Be in communication with the outside one of one or more petroleum-polluted soil horizons 3, one or more horizontal porous aerophobic tubes 4, one end
Or multiple vertical feeding pipes 5, isolation top layer 6, steam piece-rate system 7, active carbon purifying system 8, monitoring system 9, exhaust system
10 and control system 11.
Embodiment
First, soil regime (soil sources, pollution condition etc.)
The present embodiment repairs somewhere incinerator contaminated soil, because the incinerator is for receiving in the operation of decades
Collect and sorting rubbish, some oil plants and chemical substance are incinerated and stored to rubbish, thus the soil of the site boundary by
The erosion of multiple pollutant is arrived, the heavy oil such as including lubricating oil.About 2400m is shared by hydrocarbon (greasy dirt) contaminated soil3。
2nd, the step of establishing dystopy microorganism remediation system
(1) the existing unpolluted soil in ground (about 1m is deep) is removed, makes the soil layer that exposes solid and pollution-free；
(2) the thick beddings of building waste material (concrete block of certain particle diameter, inert material) composition 225mm are torn open using existing；
(3) 50mm thickness rubble composition bed course is re-layed thereon；
(4) 300mm thickness armoured concrete slabs are poured thereon；
(5) after armoured concrete slab is built up, thick high density polyethylene (HDPE) (HDPE) geotextiles of 1mm are laid thereon；
* note：(2)~(5) constitute isolation bottom above, to prevent biological heap leachate from permeating the ground, pollute.
(6) waterproof test is carried out；
(7) steam piece-rate system (including knockout drum of 2m diameters and valve, pipeline etc.) is established；
(8) the thick draining pads of 10mm are laid in the high density polyethylene (HDPE) geotextiles of foregoing (5), this is drainage blanket；
(9) 300mm thickness fine sand is re-layed on drainage blanket, and (effect of this sand bed has：1. the protection as its lower drainage blanket
Layer, because pending sludge is made up of multiple material and irregular shape, so this layer risen during biological heap is constructed it is slow
Punching acts on；2. it is the retired offer flexibility in part biological heap part, such as when certain a part of sludge biodegrading is completed, should
The sludge that part is disposed can be dug out by excavator without destroying drainage blanket.(10) laid on above-mentioned 300mm thickness sand bed
First layer sludge thick 1m；
(11) multiple porous aerophobic tubes of level are laid on above-mentioned soil horizon, and vertical feeding pipe is also inserted into soil
(feed pipe controls air capacity, in addition passage can also be used as to provide necessary nutrient and moisture)；Horizontal porous aerophobic tube
For diameter 100mm uPVC antipriming pipes, and wrapped up by geotextile；And vertical feeding pipe is diameter 50mm steel pipes, its termination has
Control valve.
(12) continue to lay the thick second layer sludge of 1m；
(13) multiple porous aerophobic tubes of level are equally laid on above-mentioned soil horizon；
(14) continue to lay the thick third layer sludge of 1m；
(15) workbench is constructed thereon (it act as：Path is provided for the running, monitoring and soil sampling of biological heap)；
(16) HDPE geotextiles are covered on third layer soil, that is, isolating top layer, (it act as：Make biological heap from the external world
Changes in weather influences, and is smoothed out keeping favourable condition, such as water content and temperature etc. to be biodegradable)；
(17) monitoring system is established to monitor the running of biological heap；
(18) exhaust system (air exhauster) is established, makes in the soil horizon caused steam and comprising volatile oil and gas
Waste gas is discharged by the porous aerophobic tube of level via discharge (pumping) system；
(19) active carbon purifying system is established, to filter out the volatile oil and gas and pollution gas in discharge gas, really
Protect final arrange to the gas of air and meet discharge standard；
(20) control panel system is established, the monitoring system of the system and foregoing (17) comes together to manage the fortune of biological heap
Make；
(21) all devices are connected to control panel system；
(22) bacterium (via vertical feeding pipe) is added into biological heap according to the result of dissolution test；
(23) round-the-clock running can be carried out after the system trial run, first soil samples and detecting is carried out after three months, until
Final soil samples and detecting is qualified.
3rd, the parameters of microorganism remediation
1st, by detecting, there is the species of organic pollution in the embodiment：
(1) petroleum hydrocarbon (total petroleum hydrocarbon, i.e. TPH), carbon number (is divided into three groups from 6 to 35
C6-C8, C9-C16And C7-C35), cleared desired value is 1.0 × 104mg/kg；
(2) Polychlorinated biphenyls (Polychlorinated Biphenyls, i.e. PCBs) cleared desired value is 0.748mg/kg；
* note：For Polychlorinated biphenyls, the value listed here is taken in local standard among " industrial land " and " park land used "
Stricter index.
2nd, for different pollutants to be canceled, different policies is taken.
(1) at this polluted soil it is main, most pollutant be petroleum hydrocarbon, i.e. TPH, maximum concentration 424,
400mg/kg.For this kind of pollutant, soil is mainly taken to have microorganism by oneself, the bacterium for adding a small amount of pseudomonas bacillus category is (such as green
Purulence bacillus and fixed nitrogen Si Shi Pseudomonas albas), humidity keeps 25% or so, C:N:P=100:9:1, pH be 7.5~7.7 it
Between, processing time is 7 months (210 days).
(2) another part pollutant Polychlorinated biphenyls is PCBs, and proportion is less, maximum concentration 3.9mg/kg.It is right
In this kind of pollutant, addition Rhodotorula bacterial strain is mainly taken, humidity keeps 25% or so, C:N:P=100:9:1, pH 7.5
Between~7.7, processing time is 7 months (210 days).
4th, sampling analysis and microorganism remediation result
Proportionally, 27 samples are sampled altogether to be tested.In biological heap operation, each moon samples once
(the first sub-sampling is after starting 2 months), biological heap termination running sampling is sampled as the last time.The microorganism remediation of sample
As a result it is shown in Figure 2.
Fig. 2 shows the TPH contents (representativeness) that all previous sampling of certain sample point measures, C in final sampling6-C8Hydro carbons concentration
Less than 5mg/kg, C9-C16Hydro carbons concentration is less than 200mg/kg, C7-C35Hydro carbons concentration is less than 500mg/kg, and TPH also much smaller than
Cleared desired value 1.0 × 104mg/kg。
For PCBs, maximum concentration 0.6mg/kg, again smaller than cleared desired value 0.748mg/kg.
From above-mentioned testing result, microorganism remediation result is good, reaches environmental protection standard, and oily waste degradation rate reaches
83%, especially by ventilated effect is strengthened, strengthen Microorganism respiration, so as to improve greasy dirt degradation rate.In addition,
Improve the degradation rate that soil moisture content also increases greasy dirt.For the Mycophyta for the PCBs that degrades, by adding nitrogen, accelerate
Its decomposed P CBs efficiency.
5th, exhaust gas constituents, emission control
Primary waste gases are as shown in the table
。
Claims (8)
1. the dystopy microorganism remediation system of a kind of petroleum-polluted soil, it is characterised in that the system includes：
1) the isolation bottom of laying on the ground；
2) the multiple petroleum-polluted soil horizons being laid on the isolation bottom；
3) the multiple porous aerophobic tubes of level being laid in the soil horizon；
4) multiple vertical feeding pipes that the one end being laid in the soil horizon is in communication with the outside；
5) it is laid on the isolation top layer of the top；
6) exhaust system connected with the multiple porous aerophobic tube of level,
Further comprise drainage blanket and sand bed from the bottom to top between the isolation bottom and the soil horizon,
The isolation bottom and the interference isolated top layer and prevent ambient atmos and moisture, so as to maintain in the soil horizon
Temperature and humidity condition.
2. the dystopy microorganism remediation system of petroleum-polluted soil according to claim 1, it is characterised in that described
Isolation bottom is made up of concrete layer, metalling, armoured concrete slab and high density polyethylene (HDPE) geotextiles from the bottom to top.
3. the dystopy microorganism remediation system of petroleum-polluted soil according to claim 1, it is characterised in that described
Repair system further comprises the steam piece-rate system positioned at the exhaust system upstream, active carbon purifying system and monitoring system
System.
4. the dystopy microorganism remediation system of petroleum-polluted soil according to claim 1, it is characterised in that described
Repair system further comprises the control system being connected with the vertical feeding pipe, and it is described vertical to be controlled by the control system
Feed tube.
5. a kind of dystopy repairing method of microorganism of petroleum-polluted soil, it is characterised in that methods described includes following step
Suddenly：
1) bottom is isolated in laying on the ground；
2) multiple petroleum-polluted soil horizons are laid on the isolation bottom；
3) multiple porous aerophobic tubes of level are laid in the soil horizon；
4) multiple vertical feeding pipes that one end is in communication with the outside are laid in the soil horizon；
5) isolation top layer is laid in the top；
6) exhaust system connected in outside foundation with the multiple porous aerophobic tube of level；
7) nutriment and water and air needed for microorganism and optional breeding are launched by the vertical feeding pipe；
8) caused steam and the waste gas comprising volatile oil and gas in the soil horizon is made to pass through the porous aerophobic tube of level
Discharged via exhaust system,
Further lay drainage blanket and sand bed from the bottom to top between the isolation bottom and the soil horizon,
The isolation bottom and the interference isolated top layer and prevent ambient atmos and moisture, so as to maintain in the soil horizon
Temperature and humidity condition.
6. the dystopy repairing method of microorganism of petroleum-polluted soil according to claim 5, it is characterised in that described
Isolation bottom is made up of concrete layer, metalling, armoured concrete slab and high density polyethylene (HDPE) geotextiles from the bottom to top.
7. the dystopy repairing method of microorganism of petroleum-polluted soil according to claim 5, it is characterised in that in institute
State exhaust system upstream and further establish steam piece-rate system, active carbon purifying system and monitoring system.
8. the dystopy repairing method of microorganism of petroleum-polluted soil according to claim 5, it is characterised in that enter one
Step establishes the control system being connected with the vertical feeding pipe, controls the vertical feeding pipe to feed by the control system.
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| CN105149331B (en) * | 2015-08-24 | 2017-06-27 | 厦门中沐生态科技有限公司 | A kind of soil restoring device, soil remediation method |
| CN106077078B (en) * | 2016-08-17 | 2022-06-03 | 中化学土木工程有限公司 | Method and mechanism for repairing petroleum-polluted soil |
| CN106311736A (en) * | 2016-08-26 | 2017-01-11 | 北京航天环境工程有限公司 | System and method for restoring contaminated soil |
| CN106694534A (en) * | 2017-01-13 | 2017-05-24 | 上格环境科技（上海）有限公司 | Organic bank-soil leaching system for repairing heavy metal and petroleum soil contamination |
| CN108655166A (en) * | 2018-03-16 | 2018-10-16 | 谢宁汉 | A kind of method of rehabilitating soil pollution |
| CN114472503A (en) * | 2020-11-13 | 2022-05-13 | 新疆大学 | Composite remediation method for soil polluted by leaky petroleum |
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| JP2001009439A (en) * | 1999-06-25 | 2001-01-16 | Aizu Dust Center:Kk | Method for cleaning volatile organic material-containing soil |
| AU2003218183A1 (en) * | 2002-03-18 | 2003-10-08 | Alan Brian Cash | On-site contaminated soil treatment and method |
| CN2530740Y (en) * | 2002-03-29 | 2003-01-15 | 中国科学院沈阳应用生态研究所 | Contaminated soil heterotopic biological repair system |
| JP4811979B2 (en) * | 2002-12-12 | 2011-11-09 | 鹿島建設株式会社 | Water-circulating biological purification method and apparatus for contaminated soil |
| KR100757332B1 (en) * | 2007-02-05 | 2007-09-11 | 주식회사 젠트로 | Restoration methods of contaminated soil |
| CN101357369B (en) * | 2008-09-26 | 2011-11-09 | 天津大学 | Heterotopia repairing system of volatile organic pollution soil and processing method thereof |
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