CN106001084B - Reactor for strengthening biological repairing of phenol contaminated soil through combination of electric power migration and Fenton oxidation and method for repairing phenol contaminated soil - Google Patents
Reactor for strengthening biological repairing of phenol contaminated soil through combination of electric power migration and Fenton oxidation and method for repairing phenol contaminated soil Download PDFInfo
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- CN106001084B CN106001084B CN201610367833.0A CN201610367833A CN106001084B CN 106001084 B CN106001084 B CN 106001084B CN 201610367833 A CN201610367833 A CN 201610367833A CN 106001084 B CN106001084 B CN 106001084B
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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
- B09C1/08—Reclamation of contaminated soil chemically
- B09C1/085—Reclamation of contaminated soil chemically electrochemically, e.g. by electrokinetics
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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
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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Abstract
The invention discloses a reactor for strengthening biological repairing of phenol contaminated soil through combination of electric power migration and Fenton oxidation and a method for repairing the phenol contaminated soil. The reactor comprises an electrode system, an aerating system, a liquid phase injection system and a leachate collecting system. The method for repairing the phenol contaminated soil through the reactor includes the steps that after the phenol contaminated soil is pretreated, the reactor is filled with the phenol contaminated soil; a sodium dodecyl benzene sulfonate solution and a white-rot fungi-pleurotus ostreatus bacterium suspension are sequentially sprayed to the surface of a pile; voltage is input to the electrode system, meanwhile, a hydrogen peroxide solution, water and nutrient substances are continuously input through the liquid phase injection system, air is led in through the aerating system, and the phenol contaminated soil is repaired; and waste liquid is concentrated and is collected through the leachate collecting system. By means of the reactor, the phenol migration efficiency can be improved, the repairing process is stable, efficiency is high, and the phenol contaminated soil can be stably and efficiently repaired with low cost.
Description
Technical field
The present invention relates to a kind of electric power migrates the one of joint Fenton oxidation bioremediation phenol contaminated soil
Change reactor, and the method that phenol contaminated soil is repaired based on reactor, belong to organic polluted soil and repair field.
Background technology
Phenolic comp ' ds pollution is that organic pollutants are common are in soil, and the state of accumulation is presented in natural environment with the time
Gesture, because its toxicity is higher universal concern is received, and is classified as priority pollutants by many countries.In phenol Polluted Soil
In the restorative procedure of earth, biological restoration is considered as one of restorative procedure most potential at present.Due to the hydrophobicity, steady of phenol
It is qualitative, its bioavailable degree and biological restoration speed are seriously limited, therefore, it is biological by taking enhancements to improve it
Remediation efficiency just becomes the key of biological restoration phenol contaminated soil.
Fenton oxidation method is a kind of efficient, most widely used advanced oxidation processes, in the acid condition that pH is 2～4
Under, Fe2+Being capable of catalyzing and decomposing H2O2Solution produces OH, and hydroxyl free has extremely strong oxidizing force, in the short period of time can
Persistent organic pollutants are degraded.
Electric power migrates recovery technique by applying faint direct current electric forming electric field in contaminated soil region, using unidirectional current
The various electro kinetic effects that field produces strengthen the bioavailability of pollutant in soil environment；Or various additives are effective
Be transported to soil internal contamination area.In electric power migration biological restoration, using rotation switching mode, can efficiently control
The change of pH value and soil moisture near electrode, increases system run all right, and the migration for being conducive to pollutant and microorganism is in
Existing multi-direction, multi tate.But Electroremediation technology is combined with biological restoration, the pH value of dummy and oxidation-reduction potential are held
Extreme variation is also easy to produce, a large amount of hydrions that anode electrolysis are produced can have a strong impact on the growing environment of microorganism, reduce microorganism
Activity so that remediation efficiency is reduced.
Using electric power migration and Fenton oxidation combination, can cause the charged particle in soil that orientation is done in electric field and move
It is dynamic, and the polarity of electric field is periodically switched, the change of pH value and soil moisture near electrode can be efficiently controlled, increase system
Operation stability, during using rotation switching mode, the migration of chemical agent, pollutant and microorganism is presented multi-direction, multi tate
The characteristics of, this is conducive to chemical reaction and biological restoration process.Meanwhile, during also have the process such as anodic oxidation, electro-adsorption
Degradation of organic substances, by iron anode the offer ferrous ion (Fe in solution is aoxidized2+), Fe2+With additional H2O2Constitute Fenton
Reagent participates in electrochemical reaction, and processing cost can be saved to a certain extent.Electric power is combined with Fenton oxidation, and moisture content is low
In 10% dummy, electric power migration effect is deteriorated, and it is that between 2～4, oxidation is anti-that the condition needed for Fenton oxidation needs pH
Should concentrate near anode, it is difficult to whole removing depollution thing.
The content of the invention
For the defect that prior art is present, it is to provide one kind to improve phenol migration that first purpose of the present invention is
Efficiency, repair process are stable, and the high electric power migration joint Fenton oxidation bioremediation phenol pollution of remediation efficiency
The integration apparatus of soil.
Another object of the present invention is to provide a kind of stable, inexpensive, efficient reparation phenol contaminated soil
Method.
In order to realize above-mentioned technical purpose, the invention provides a kind of electric power migration joint Fenton oxidation enhanced biological
Repair the reactor of phenol contaminated soil；
The reactor includes electrode system, aerating system, liquid phase injected system and leachate collection system；
Described electrode system includes DC source and electrode assemblie, and the electrode assemblie includes an iron anode and some
Individual inert cathode；
Described aerating system includes air compressor and least one set aeration tube, and the aeration tube is arranged in reactor
Bottom, one group of aeration tube includes a vent stack and some aeration branch pipes, and the vent stack is connected with air compressor；
Described liquid phase injected system includes nutritional solution reservoir and several nutritional solution injection wells, and including hydrogen peroxide
Reservoir and several hydrogen peroxide injection wells, the nutritional solution reservoir is connected with each nutritional solution injection well, the hydrogen peroxide storage
Reservoir is connected with each hydrogen peroxide injection well；
Described leachate collection system includes diafiltration liquid processing device, sandstone filter layer and seepage liquor collecting device, institute
State seepage liquor collecting device and be arranged on reactor inner bottom part, above described seepage liquor collecting device sandstone filter layer is equipped with,
The seepage liquor collecting device is connected with diafiltration liquid processing device by pipeline；
The iron anode is arranged on center in reactor, and the inert cathode is uniformly arranged on surrounding in reactor；
The iron anode and inert cathode are connected with DC source；
Described hydrogen peroxide injection well is arranged adjacent to iron anode, and is evenly distributed on around iron anode；The hydrogen peroxide note
Enter well and iron anode periphery is provided with permeable pH cushion walls；The vent stack is annular in shape, and around the permeable pH bufferings
Wall is arranged；
Vertically be provided with aeration branch pipe on the vent stack, and aeration branch pipe along iron anode to inert cathode directional spreding；
The nutritional solution injection well is arranged on region between the iron anode and inert cathode.
Preferred scheme, permeable pH cushion walls including the filled media including zeolite, Calx and Corallium Japonicum Kishinouye bone by constituting；Its
In, the mass ratio of zeolite, Calx and Corallium Japonicum Kishinouye bone is (3～5)：(1～2)：(1～2).
Preferred scheme, the thickness of permeable pH cushion walls is 2～3cm.
Preferred scheme, aerating system is provided with two groups of aeration tubes, and two groups of aeration tubes be arranged in parallel up and down.Parallel distance is 2
～4cm.
Preferred scheme, is uniformly provided with solarization air cap on the aeration branch pipe, the solarization air cap aperture is 1～3mm, solarization air cap
Spacing is 10～20mm.
Preferred scheme, the aeration branch pipe is coated with gauze.
Preferred scheme, nutritional solution injection well is arranged between adjacent two aeration branch pipes.
Preferred scheme, reactor is that section is regular polygon or the cylinder of circle, and pole section center is to each summit
Distance be 10～20cm, or section radius are 10～20cm, and cylinder depth is 10～30cm.
Preferred scheme, sandstone filter layer thickness is 3～4cm.
Preferred scheme, is provided with thermostat layer outside reactor, the thermostat layer is made up of polyurethane；Thermostat layer thickness is 1
～2cm.
Preferred scheme, the nutritional solution reservoir is provided with force (forcing) pump I with the connecting pipe of nutritional solution injection well, described
Hydrogen peroxide reservoir is provided with force (forcing) pump II with the connecting pipe of hydrogen peroxide injection well.
Preferred scheme, inert cathode is graphite cathode post or graphite cathode plate.
Present invention also offers a kind of method for repairing phenol contaminated soil based on described reactor, the method include with
Lower step：
1) by phenol contaminated soil through natural air drying, after grinding, sieving, balance phenol contaminated soil nutritional labeling and
Moisture；
2) Jing 1) pretreated phenol contaminated soil is filled in the inside reactor by accumulation mode；
3) dodecylbenzene sodium sulfonate solution and white rot fungi-rough skin side are sprayed successively to phenol contaminated soil heap body surface face
Ear polyp bacteria suspension；
4) to electrode system input voltage, while continually entering hydrogen peroxide solution, moisture and nutrition by liquid phase injected system
Material, by aerating system air is passed through, and carries out phenol contaminated soil remediation；
5) waste liquid enrichment is collected by leachate collection system, is focused on.
Preferred scheme, adds mushroom slag and straw to adjust the C in the phenol contaminated soil in phenol contaminated soil：N：P
For (80～120)：(8～12)：(0.5～1), and it is 20～30% to adjust the humidity of the phenol contaminated soil.
Preferred scheme, the concentration of dodecylbenzene sodium sulfonate solution is 0.05～0.06molL-1, the dodecyl
Addition of the benzene sulfonic acid sodium salt solution in phenol contaminated soil is (0.10～0.15) L:1kg.
Preferred scheme, white rot fungi-Produced from Pleurotus ostreatus bacteria suspension bacteria containing amount is (1～5) × 109Cfu/g, the white rot
Funguses-addition of the Produced from Pleurotus ostreatus bacteria suspension in phenol contaminated soil is (0.15～0.3) L:1kg.
Preferred scheme, hydrogen peroxide solution input rate is 0.05～0.15L/h, and the hydrogen peroxide solution concentration is
25wt%～30wt%；
Preferred scheme, moisture and nutrient substance input rate to maintain phenol contaminated soil in C：N：P for (80～
120)：(8～12)：(0.5～1), humidity are 20～30%.
Preferred scheme, air is passed through flow velocity for (0.5～0.6) m3/h。
Preferred scheme, voltage strength is 24～36V.
Preferred scheme, the mode of electrode system input voltage is：The inert cathode around iron anode be will be distributed over by suitable
Sequence 1～n of number consecutively, first connects iron anode and No. 1 and No. 2 inert cathode input voltages, after 10～15min, disconnects iron anode
With the voltage of No. 1 and No. 2 inert cathode；It is also turned on iron anode and No. 3 and No. 4 inert cathode input voltages, 10～15min
Afterwards, the voltage of iron anode and No. 3 and No. 4 inert cathodes is disconnected；The like, and circulation carry out, until phenol contaminated soil is repaiied
Multiple junction beam.
Preferred scheme, the mass ratio of straw, mushroom slag and phenol contaminated soil is (0.02～0.06)：(0.03～
0.08)：1.
Preferred scheme, is the migration effect for improving phenol, while less affecting the normal growth of microorganism, arranges electricity
Field gradient is 2.0～3.0V/cm.
The reactor of the present invention is preferably section for orthohexagonal cylindrical reactor, one iron anode of center setting
Post, six summits are respectively provided with a graphite cathode post；2～3 hydrogen peroxide solution injection wells, ferrum are set near iron anode post
Anode posts and hydrogen peroxide solution injection well periphery arrange permeable pH cushion walls；In reaction wall exterior lateral area, aeration tube and battalion are set
Nutrient solution injection well；Reactor bottom is provided with sandstone filter layer, and bottom connection diafiltration liquid processing device, percolate is flowed at percolate
Reason device, qualified discharge or backflow after process.
The reactor of the present invention is used to repair the know-why of phenol contaminated soil：The reactor center of the present invention is ferrum sun
Pole, orthohexagonal six summits are graphite cathode post, and after being passed through voltage, in the presence of electric field, iron anode post occurs oxygen
Change reaction, consume ferrum and produce ferrous ion, electrode hydrolysis produce a large amount of H+So that nearby contaminated soil is acidity to anode,
The reaction equation of anodic oxidation reactionses is as follows：
Fe→Fe2++2e-
2H2O→O2↑+4H++4e-
It is arranged on the hydrogen peroxide solution injection well near anode and hydrogen peroxide solution is provided, because Fenton reactions is 2 in pH
Under～4 acid condition, Fe2+Being capable of catalyzing and decomposing H2O2Solution produces OH, and hydroxyl radical free radical can degrade within a short period of time
The hardly degraded organic substances such as phenol, then can effectively carry out Fenton around anode and react so as to reach the mesh of initial breakdown phenol
, and the phenol in inside reactor soil is mainly in the presence of electric power, by the iron anode Migration And Concentration at four circumferential centers；
The initial breakdown product of phenol disperses under electric field and diffusion, further thorough under the microbial action of anode region periphery
Bottom is decomposed, and forms waste liquid, is collected from the leachate collection system of reactor bottom, is focused on.
Hinge structure, the Advantageous Effects that the technical scheme of the present patent application is brought：
The reactor of the present invention first combines electric power migration, Fenton oxidation and biological restoration, designs one
The reactor of the phenol contaminated soil remediation of body, electrokinetic migration technology is conducive to accelerating the enrichment of phenol and focuses on,
Fenton oxidation is that phenol realizes rapidly and efficiently preliminary oxidation by electrochemistry, and preliminary oxidation product is realized in conjunction with microorganism
Thoroughly decompose, package unit can substantially increase the remediation efficiency of phenol contaminated soil, reduce rehabilitation cost, be conducive to promoting and answer
With.
In technical scheme, by adding dodecylbenzene sodium sulfonate (LAS) auxiliary agent in phenol contaminated soil,
Desorption efficiency of the phenol from soil can be effectively improved, the migration rate of phenol is substantially increased.Mainly due to phenol dissolubility compared with
It is low, it is difficult to carry out electrodialysis and migrate to iron anode region to carry out Fenton oxidation and microbial degradation, by polluting in phenol
Adding dodecylbenzene sodium sulfonate (LAS) solution in soil can remarkably promote the desorption of soil phenol.On the one hand,
LAS solution can affect adsorption and desorption process of the phenol in soil, dramatically increase water-soluble state phenol；On the other hand, LAS bands
The sulfonic group of negative charge can form micelle by obligate point position surface action or hydrogen bond action absorption on sandy soil surface.Micelle
Can adsorbing phenol, due to micelle it is negatively charged, thus by electromigration to anode migrate, increase Migration And Concentration effect.The two is to benzene
Phenol Migration And Concentration has facilitation.
The iron anode region of reactor center is produced due to the enrichment of phenol, oxidation reaction in technical scheme
Ferrous ion and the acid condition of suitable Fenton oxidation reaction, can rapid, efficiently degradation of phenol, but, due to acidity
Condition has severely impacted the activity and repairing effect of microorganism.Technical solution of the present invention in anode region periphery by arranging boiling
The permeable pH cushion walls that stone, Calx and Corallium Japonicum Kishinouye bone are constituted, when peracid solutions pass through reaction wall, with reaction potassium carbonate within the walls
Reaction generates carbon dioxide, and scalable reactor pH, control reaction wall internal pH is maintained in the range of 2～4, reaction wall outside pH
It is maintained in the range of 6.8～7.8, is conducive to the Fenton reactions and the microbial degradation of outside of inside.
In technical scheme, in electrically and biologically is repaired, in order to efficiently control the pH value near graphite cathode
With the change of soil moisture, increase system run all right, using rotation switching mode, the migration of pollutant and microorganism can be made
The characteristics of multi-direction, multi tate is presented, is conducive to microorganism remediation process.The micro- of soil entirety is kept using rotation switching mode
Biology total, the microbial count for making middle part soil and negative electrode soil keeps higher level, and suitable electric field action to contribute to
Promote soil microorganism growth.
In technical scheme, also constant temperature layer interlayer is provided with the outside of reactor, its inner stuffing is poly- ammonia
Ester, its thermal conductivity ratio air is much lower, good heat insulating, temperature control in the range of 20～30 DEG C, this temperature range
Be conducive to improving the activity and growth rate of microorganism in reactor.
Description of the drawings
【Fig. 1】For reactor overall structure diagram；
【Fig. 2】For reactor top view；
Wherein,
1 is nutritional solution reservoir, and 2 is hydrogen peroxide solution reservoir, and 3 is force (forcing) pump I, and 4 is force (forcing) pump II, and 5 is nutritional solution
Injection well, 6 is inert cathode (graphite cathode post), and 7 is hydrogen peroxide solution injection well, and 8 is iron anode post, and 9 is leachate collection
Device, 10 is permeable pH cushion walls, and 11 is sandstone filter layer, and 12 is DC source, and 13 is air compressor, and 14 are aeration
Pipe, 15 is thermostat layer, and 16 are diafiltration liquid processing device, and 17 is vent stack.
Specific embodiment
Following examples are intended to further illustrate present invention with reference to Figure of description, rather than limit right of the present invention
The protection domain of requirement.
The structure of reactor of the present invention is as depicted in figs. 1 and 2：Reactor body includes electrode system, aerating system, liquid phase
Injected system and the part of leachate collection system four.
Electrode system mainly provides electric field, power source is provided for electric power migration, while providing electric current for Fenton oxidation.
Reactor is that section is orthohexagonal cylinder, and pole section center to the distance on each summit is 20cm, and cylinder depth is
20cm.Electrode system includes DC source 12 and electrode assemblie, and the electrode assemblie includes 1 iron anode post 8 and six graphite
Cathode column 6；The iron anode post 8 is arranged on center in reactor, and the graphite cathode post 6 is uniformly arranged on regular hexagon
Each vertex position in cylinder reactor；The iron anode post 8 and graphite cathode post 6 are connected with DC source 12.
Described aerating system is mainly in reactor and provides oxygen-containing gas, is the existence ring that aerobic microbiological is provided with profit
Border.Aerating system includes air compressor 13 and two groups of aeration tubes, and the aeration tube is arranged on bottom in reactor, one group of aeration
Pipe includes a vent stack 17 and the six roots of sensation aeration branch pipe 14 being arranged on vent stack 17, the vent stack 17 and air
Compressor 13 connects；Two groups of aeration tubes be arranged in parallel up and down, and parallel distance is 3cm.Exposure is uniformly provided with the aeration branch pipe 14
Pore, the solarization air cap aperture is 2mm, and aeration pitch of holes is 10mm；Gauze is enclosed with the aeration branch pipe 14, both can be ensured
Uniform air distribution, is difficult contaminated soil clogging pore again.The a diameter of 15mm of vent stack, a diameter of 5mm of aeration branch pipe, ventilation master
Pipe and aeration branch pipe are PVC material.
Described liquid phase injected system is mainly in reactor and provides nutritional labeling and moisture, and provides Fenton oxidation
Reagent hydrogen peroxide solution, moisture and nutritional labeling are the necessary material of bacteria metabolism, are conducive to microbe survival；And it is double
Oxygen aqueous solution is the oxidising agent of Fenton oxidation.Liquid phase injected system includes nutritional solution reservoir 1 and six nutritional solution injections
Well 5, and including hydrogen peroxide reservoir 2 and three hydrogen peroxide injection wells 7, the nutritional solution reservoir 1 injects with each nutritional solution
Well 5 connects, and nutritional solution reservoir 1 is provided with force (forcing) pump I 3, the hydrogen peroxide reservoir with the connection official road of nutritional solution injection well 5
2 are connected with each hydrogen peroxide injection well 7, and hydrogen peroxide reservoir 2 is provided with force (forcing) pump II 4 with the connecting pipe of hydrogen peroxide injection well 7.
Nutritional solution reservoir 1 is stainless steel material, and length × width × height is 30cm × 20cm × 20cm, and volume is 12L.
Described leachate collection system is mainly the waste collection system in reactor.Leachate collection system includes oozing
Filtrate processing device 16, sandstone filter layer 11 and seepage liquor collecting device 9, the seepage liquor collecting device 9 is arranged on reactor
Inner bottom part, described seepage liquor collecting device 9 is equipped with above sandstone filter layer 11, the seepage liquor collecting device 9 and diafiltration
Liquid processing device 16 is connected by pipeline；The described thickness of sandstone filter layer 11 is 3cm.The 16 diafiltration liquid processing device is maximum
Treating capacity is 8L/d, and the effluent recycling after process is to nutritional solution reservoir 1.
Described hydrogen peroxide injection well 7 is arranged adjacent to iron anode post 8, and is evenly distributed on around iron anode post 8；It is described double
Oxygen water injection well 7 and iron anode post periphery are provided with permeable pH cushion walls 10, and permeable pH cushion walls 10 are cylindrical shape, by ferrum sun
Pole 8 and hydrogen peroxide injection well 7 are isolated into Fenton oxidation reaction zone；In described permeable pH cushion walls 10 filled media by
Zeolite, Calx and Corallium Japonicum Kishinouye bone are constituted.
The vent stack 17 is annular in shape, and arranges around the permeable pH cushion walls 10；On the vent stack 17
Vertically be provided with aeration branch pipe 14, and aeration branch pipe 14 along iron anode post 8 to the directional spreding of graphite cathode post 6；The nutritional solution note
Enter well 1 and be arranged on region between the iron anode post 8 and graphite cathode post 6, and be arranged between adjacent two aeration branch pipes 14.
Thermostat layer 15 is provided with outside described reactor, the thermostat layer 15 is made up of polyurethane；Thickness is 1cm, mainly
For adjusting temperature of reactor, 20～30 DEG C are kept the temperature at.
Embodiment 1
1. the phenol contaminated soil excavated mixes with mushroom slag, straw after remove impurity of sieving in rotary drum, wherein,
4% mushroom slag, 2% straw are added according to the contaminated soil mass ratio, the C in phenol contaminated soil is adjusted：N：P (80～
120)：(8～12)：In (0.5～1) proportion, and it is 25% to adjust moisture；
2. contaminated soil after mixing is added in reactor in the form of heap body；
3. sodium dodecyl benzenylsulfonate (LAS) solution is sprayed to heap body, concentration is 0.06molL-1, solution and Polluted Soil
The volume mass ratio of earth is 0.12L：1kg；
4. after 1 hour, white rot fungi-Produced from Pleurotus ostreatus bacteria suspension is sprayed to heap body, white rot fungi-Produced from Pleurotus ostreatus bacterium is hanged
Liquid is 0.2L with the volume mass ratio of contaminated soil：1kg, microbial inoculum bacteria containing amount is 4 × 109cfu/g；
4. H is extracted by force (forcing) pump II2O2The H of the 30% of solution reservoir2O2Solution, in H2O2Solution injection well is to soil
Heap body injects H2O2Solution, adding speed is 0.1L/h；
5. extract carbamide and moisture in liquid phase reservoir to adjust nutrient substance ratio C by force (forcing) pump I：N：P meets
(80～120)：(8～12)：(0.5～1), keeps soil moisture to be 20～30%；
6. daily aeration carried out to soil heap body air blast by aerating system with air compressor, air velocity control exists
(0.5～0.6) m3/h；
7. startup power supply switch, sets up electric field between iron anode and graphite cathode, and setting voltage is 30V, and electrode is changed
Pattern is：The first step, opens two graphite cathodes of iron anode and numbering 1,2, reacts 10min；Second step, closes numbering 1,2
Two graphite cathodes, while open numbering 3,4 two graphite cathodes, reaction 10min；3rd step, closes the two of numbering 3,4
Individual graphite cathode, while opening two graphite cathodes of numbering 5,6, reacts 10min；By that analogy, until contaminated soil remediation
Terminate；
8. when pollutant levels reach discharge standard, waste liquid is collected from leachate collection system, transports original place back or transform into
Other purposes.
Embodiment adopts phenol content for 300mgkg-1Contaminated soil.After the process of 7d, testing soil benzene
Phenol content is 35.48mgkg-1, clearance is 88.2%.
Claims (9)
1. a kind of electric power migrates the reactor of joint Fenton oxidation bioremediation phenol contaminated soil, and its feature exists
In：
The reactor includes electrode system, aerating system, liquid phase injected system and leachate collection system；
Described electrode system includes DC source and electrode assemblie, and the electrode assemblie includes that an iron anode is lazy with several
Property negative electrode；
Under described aerating system includes that air compressor and least one set aeration tube, the aeration tube are arranged in reactor
Portion, one group of aeration tube includes a vent stack and some aeration branch pipes, and the vent stack is connected with air compressor；
Described liquid phase injected system includes nutritional solution reservoir and several nutritional solution injection wells, and including hydrogen peroxide savings
Pond and several hydrogen peroxide injection wells, the nutritional solution reservoir is connected with each nutritional solution injection well, the hydrogen peroxide reservoir
It is connected with each hydrogen peroxide injection well；
Described leachate collection system includes diafiltration liquid processing device, sandstone filter layer and seepage liquor collecting device, described to ooze
Leakage collection device is arranged on reactor inner bottom part, and sandstone filter layer is equipped with above described seepage liquor collecting device, described
Seepage liquor collecting device is connected with diafiltration liquid processing device by pipeline；
The iron anode is arranged on center in reactor, and the inert cathode is uniformly arranged on surrounding in reactor；It is described
Iron anode and inert cathode are connected with DC source；
Described hydrogen peroxide injection well is arranged adjacent to iron anode, and is evenly distributed on around iron anode；The hydrogen peroxide injection well
And iron anode periphery is provided with permeable pH cushion walls；The vent stack is annular in shape, and sets around the permeable pH cushion walls
Put；
Vertically be provided with aeration branch pipe on the vent stack, and aeration branch pipe along iron anode to inert cathode directional spreding；It is described
Nutritional solution injection well is arranged on region between the iron anode and inert cathode；
Described aerating system is provided with two groups of aeration tubes, and two groups of aeration tubes be arranged in parallel up and down；
Solarization air cap is uniformly provided with the aeration branch pipe, the solarization air cap aperture is 1～3mm, and aeration pitch of holes is 10～20mm；
The aeration branch pipe is coated with gauze.
2. electric power migration joint Fenton oxidation bioremediation phenol contaminated soil according to claim 1 is anti-
Answer device, it is characterised in that：
Described permeable pH cushion walls including the filled media including zeolite, Calx and Corallium Japonicum Kishinouye bone by constituting；Wherein, zeolite,
The mass ratio of Calx and Corallium Japonicum Kishinouye bone is (3～5)：(1～2)：(1～2).
3. electric power migration joint Fenton oxidation bioremediation phenol contaminated soil according to claim 1 is anti-
Answer device, it is characterised in that：Described nutritional solution injection well is arranged between adjacent two aeration branch pipes.
4. electric power migration joint Fenton oxidation bioremediation phenol contaminated soil according to claim 1 is anti-
Answer device, it is characterised in that：Described reactor is that section is regular polygon or the cylinder of circle, and pole section center is pushed up to each
The distance of point is 10～20cm, or section radius are 10～20cm, and cylinder depth is 10～30cm；
Described sandstone filter layer thickness is 3～4cm.
5. the method for phenol contaminated soil being repaired based on the reactor described in any one of Claims 1 to 4, it is characterised in that：Bag
Include following steps：
1) by phenol contaminated soil through natural air drying, after grinding, sieving, the nutritional labeling and water of phenol contaminated soil is balanced
Point；
2) Jing 1) pretreated phenol contaminated soil is filled in the inside reactor by accumulation mode；
3) dodecylbenzene sodium sulfonate solution and white rot fungi-Produced from Pleurotus ostreatus are sprayed successively to phenol contaminated soil heap body surface face
Bacteria suspension；
4) to electrode system input voltage, while hydrogen peroxide solution, moisture and nutrient substance are continually entered by liquid phase injected system,
Air is passed through by aerating system, phenol contaminated soil remediation is carried out；
5) waste liquid enrichment is collected by leachate collection system, is focused on.
6. it is according to claim 5 based on reactor repair phenol contaminated soil method, it is characterised in that：It is dirty in phenol
Dye soil adds mushroom slag and straw to adjust the C in the phenol contaminated soil：N：P is (80～120)：(8～12)：(0.5～
1), and adjust the phenol contaminated soil humidity be 20～30%.
7. it is according to claim 5 based on reactor repair phenol contaminated soil method, it is characterised in that：Described ten
The concentration of dialkyl benzene sulfonic acids sodium solution is 0.05～0.06molL-1, the dodecylbenzene sodium sulfonate solution is in phenol dirt
Addition in dye soil is (0.10～0.15) L:1kg；
Described white rot fungi-Produced from Pleurotus ostreatus bacteria suspension bacteria containing amount is (1～5) × 109Cfu/g, the white rot fungi-rough skin
Addition of the Pleurotus sp2 bacteria suspension in phenol contaminated soil is (0.15～0.3) L:1kg.
8. it is according to claim 5 based on reactor repair phenol contaminated soil method, it is characterised in that：Described is double
Oxygen aqueous solution input rate is 0.05～0.15L/h, and the hydrogen peroxide solution concentration is 25wt%～30wt%；
Described moisture and nutrient substance input rate to maintain phenol contaminated soil in C：N：P is (80～120)：(8～
12)：(0.5～1), humidity are 20～30%；
Described air is passed through flow velocity for (0.5～0.6) m3/h；
Described voltage strength is 24～36V.
9. it is according to claim 5 based on reactor repair phenol contaminated soil method, it is characterised in that：Described electricity
The mode of electrode systems input voltage is：Inert cathode around iron anode 1～n of number consecutively in order is will be distributed over, is first connected
Iron anode and No. 1 and No. 2 inert cathode input voltages, after 10～15min, disconnect the electricity of iron anode and No. 1 and No. 2 inert cathode
Pressure；Iron anode and No. 3 and No. 4 inert cathode input voltages are also turned on, after 10～15min, iron anode and No. 3 and No. 4 is disconnected
The voltage of inert cathode；The like, and circulation carry out, until phenol contaminated soil remediation terminates.
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