CN104307867B - The apparatus and method of electric driving method combined degradation bacterium repairing polluted soil are poured on surface - Google Patents
The apparatus and method of electric driving method combined degradation bacterium repairing polluted soil are poured on surface Download PDFInfo
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Abstract
The apparatus and method of electric driving method combined degradation bacterium repairing polluted soil are poured on a kind of surface that the invention discloses oil polluted environment recovery technique field.This device mainly comprises: power supply, electrode, degradation bacteria liquid injecting pipeline, PRB react wall, intelligent multi-channel counter and control system etc., five electrodes are evenly settled from down to up successively in the direction being wherein parallel to horizontal plane at Polluted area, settle a degradation bacteria liquid injecting pipeline between every two electrodes, controlled by intelligent multi-channel counter and each control system in repair process.The present invention adopts and pours into formula electric driving method reparation pollutant, by converting the use of electrode, constantly gushed out to upper soll layer by petroleum pollution, the part petroleum pollution moved from lower to upper can be degraded bacterium degraded, and the pollutant moving to upper soll layer is then adsorbed on PRB and reacts in wall.The present invention can by soil PetroChina Company Limited. pollutant efficient degradation, and non-secondary pollution.
Description
Technical field
The invention belongs to soil pollution environment remediation technical field, be specifically related to the apparatus and method that electric driving method combined degradation bacterium repairing polluted soil is poured on a kind of surface.
Background technology
The mixture that oil is made up of thousands of kinds of compounds, mainly comprises saturated hydrocarbons, compound fragrant hydrocarbon, asphalitine, resinae etc.These compounds have carcinogenic, cause the effects such as change, teratogenesis, and by food chain enrichment in animal and plant body, all can cause very large negative effect to environment, plant, the mankind.With regard to soil pollution, the lateral transfer of oil in soil distributes radially, and pollution intensity increases with the distance of pollution sources and reduces rapidly, and the heaviest region of pollution sources ambient contamination is within the scope of 0-40m, account for total amount more than 90%, lateral transfer scope is determined within 150m; The ground crude oil vertical migration overwhelming majority concentrates on apart within the scope of soil surface 0-10cm, and vertical migration is generally no more than 70cm.
The domestic and international processing method polluted about soil PetroChina Company Limited. is divided into Physical, chemical method and bioanalysis at present.Wherein, Physical mainly according to the physical characteristic of petroleum hydrocarbon, utilize the method such as absorption, air lift, extraction by its from contaminated soil mutually separate.The main treatment technology of Physical is absorption method, naturally floating upper method, air-extraction, extraction, membrane technology and heat treating process.The character that chemical method mainly carrys out separation and recovery pollutant according to chemical principle and method or changes them makes it innoxious, and major technique comprises wet oxidation process, Chemical Leaching method, electricity flocculation and electrolytic oxidation etc.The bioanalysis reparation of contaminated soil refers to and utilizes specific plant, animal and antimicrobial absorbent, conversion, removing or degraded environmental contaminants, makes pollutant levels in environment be reduced to tolerance interval.Major technique comprises throws bacterium method, biological culture method, bioventing process, soil cultivating method, composting process, bioreactor method and Anaerobic Treatment method.Physical is the postponement measure of rehabilitating soil PetroChina Company Limited., can not fundamentally solve oil pollution problem, chemical method is short for repair time, but easily produce secondary pollution, bioanalysis repair relative to Physical and chemical Treatment economic costs few, little to ambient influnence, do not produce secondary pollution, but the remedying oil-polluted soils cycle is longer.
The electro reclamation of contaminated soil is the research field that comprehensive soil chemistry, Environmental Chemistry, electrochemistry and an analytical chemistry etc. intersect.Electro reclamation refers at contaminated soil and groundwater region electrode insertion, forms low-voltage direct electric field, utilizes electro kinetic effect that pollutant is moved, thus reaches the object removing pollutant in soil.Electro reclamation main movement mechanism has electrodialysis, electromigration and electrophoresis etc.Electrodialysis refers to the motion that the pore water in soil causes under the effect of extra electric field power, and translational speed is comparatively slow, and closely related with soil property.Electromigration refer to charged ion in contaminated soil and ionic compound under the effect of electric field force cation to cathodic migration, the process of anion anode migration.Electrophoresis refers under the effect of extra electric field power, and the charged colloidal particle (tiny soil particle, corruption plant grain, microbial cell etc.) in soil drives the pollutant be adsorbed on these particle surfaces to do displacement.
The comparison of ingredients of oil is complicated, and primarily of alkane, cycloalkane, aromatic hydrocarbon and a small amount of non-hydrocarbons composition, it is a kind of mixture.Microorganism it has been generally acknowledged that two kinds of mechanism to petroleum hydrocarbon degraded, one is Direct Resolution, microorganism is in the vital movements such as its growth and breeding, take hydrocarbon as carbon source, make this type of material chain rupture utilizing in process, the HMW noxious material of complexity is decomposed into simple low-molecular-weight innocuous substance; Another passes through co-metabolic degradation, Co metabolism refers to that compound can not be utilized by permineralization, microorganism must obtain most of carbon source and the energy from other substrate, that is, the biodegradation process having primary energy material to deposit the organic compound that just can carry out in case.
Permeable reactive barrier (PermeableReactiveBarrier, PRB) technology is the underground water pollution based technique for in-situ remediation developed rapidly in recent years, because it possesses, sustainable in-situ treatment multiple pollutant, treatment effect are good, little to environmental perturbation, installation convenient, low cost and other advantages, have become the developing direction that soil pollution reparation is main.When the pollutant in soil is by PRB, pollutant and materials for wall generation chemical reaction and be removed, thus reach the object of environment remediation.PRB, once install, except needing to change except body of wall reaction material in some cases, needs other operation and maintenance costs hardly.
Traditional electric repair method inserts two electrodes at Polluted area perpendicular to horizontal direction, from current research conditions, many being applicable to tests reparation, processing region area is less, and present pollutant delay situation at Polluted area intermediate zone, pollutant rate travel is less, core of the present invention is, propose surface and pour into the electronic combined degradation bacterium of formula and PRB technology, from Polluted area bottom, pollutant is approached Polluted area top layer gradually, merge degradation bacteria and PRB technology, promote desorb and the degraded of soil PetroChina Company Limited. pollutant.
Summary of the invention
Not enough for prior art, the object of this invention is to provide the apparatus and method that electric driving method combined degradation bacterium repairing polluted soil is poured on a kind of surface.
To achieve these goals, the present invention adopts following technical scheme:
The device of electric driving method combined degradation bacterium repairing polluted soil is poured on a kind of surface, described device comprises: one-level anode 1, secondary anode 2, first electrodes 3, secondary electrodes 4, three grades of negative electrodes 5, one-level anode chamber 6, secondary anode chamber 7, first electrodes room 8, secondary electrodes room 9, three grades of cathode chambers 10, first class control system 11, intelligent multi-channel counter 12, voltage-stabilized power supply 13, secondary multi-channel peristaltic pump 14, second control system 15, electrolyte treatment trough 16, negative electrode liquid bath 17, anode liquid bath 18, three-stage control system 19, three grades of multi-channel peristaltic pumps 20, degradation bacteria liquid bath 21, level Four control system 22, single channel peristaltic pump 23, PRB reacts wall 24 and degradation bacteria liquid injecting pipeline: one-level liquid injecting pipeline 1-1, secondary liquid injecting pipeline 1-2, three grades of liquid injecting pipeline 1-3 and level Four liquid injecting pipeline 1-4, single unit system is in sealing state, described voltage-stabilized power supply 13 connects intelligent multi-channel counter 12 and first class control system 11 successively, is then connected with three grades of negative electrodes 5 with one-level anode 1, secondary anode 2, first electrodes 3, secondary electrodes 4 respectively, described one-level anode 1, secondary anode 2, first electrodes 3, secondary electrodes 4 and three grades of negative electrodes 5 are placed in one-level anode chamber 6, secondary anode chamber 7, first electrodes room 8, secondary electrodes room 9 and three grades of cathode chambers 10 respectively, described electrolyte treatment trough 16 connects second control system 15 and secondary multi-channel peristaltic pump 14 successively, then be connected with each electrode chamber respectively, described negative electrode liquid bath 17 is connected three-stage control system 19 and three grades of multi-channel peristaltic pumps 20 with anode liquid bath 18 successively with parallel way, is then connected with each electrode chamber respectively, above-mentioned five electrodes are evenly settled from down to up successively in the direction being parallel to horizontal plane at Polluted area, between adjacent electrode room, install degradation bacteria liquid injecting pipeline successively, described degradation bacteria liquid bath 21 is connected with each degradation bacteria liquid injecting pipeline above-mentioned by level Four control system 22 and single channel peristaltic pump 23, shown PRB reacts wall 24 and is arranged near three grades of cathode chambers 10.
Utilize a method for said apparatus repairing polluted soil, said method comprising the steps of:
(1) degree of depth of oil-polluted soils is investigated, when guaranteeing to cover all pollution ranges, the all parts of described device is installed, the direction being parallel to horizontal plane is from bottom to top evenly arranged five identical plate electrodes, lay degradation bacteria liquid injecting pipeline in adjacent two electrode centre positions, PRB is installed near three grades of cathode chambers 10 and reacts wall 24.
(2) by first class control system 11, one-level anode 1 is connected to the positive pole of voltage-stabilized power supply 13, first electrodes 3 is connected to the negative pole of voltage-stabilized power supply 13, run intelligent multi-channel counter 12, and the running time of one-level anode 1 and first electrodes 3 is controlled by it, run by level Four control system 22 simultaneously, liquid in degradation bacteria liquid bath 21 is injected the degradation bacteria one-level liquid injecting pipeline 1-1 between one-level anode 1 and secondary the anode 2 and degradation bacteria secondary liquid injecting pipeline 1-2 between secondary anode 2 and first electrodes 3, wherein executed voltage gradient is 1-3v/cm, liquid injecting pipeline injection speed is 5-10mL/min, inject time is 5-8h, multi-channel intelligent counter 12 gate time is 12-24h,
(3) by first class control system 11, secondary anode 2 is connected to the positive pole of voltage-stabilized power supply 13, secondary electrodes 4 is connected to the negative pole of voltage-stabilized power supply 13, run intelligent multi-channel counter 12, and the running time of secondary anode 2 and secondary electrodes 4 is controlled by it, run by level Four control system 22 simultaneously, liquid in degradation bacteria liquid bath 21 is injected the degradation bacteria secondary liquid injecting pipeline 1-2 between secondary anode 2 and the first electrodes 3 and three grades of liquid injecting pipeline 1-3 of the degradation bacteria between first electrodes 3 and secondary electrodes 4, wherein applied voltage gradient, liquid injecting pipeline injection speed, inject time, the multi-channel intelligent rolling counters forward time is all identical with step (2),
(4) by first class control system 11, first electrodes 3 is connected to the positive pole of voltage-stabilized power supply 13, three grades of negative electrodes 5 are connected to the negative pole of voltage-stabilized power supply 13, run intelligent multi-channel counter 12, and the running time of first electrodes 3 and three grades of negative electrodes 5 is controlled by it, simultaneously by running level Four control system 22, liquid in degradation bacteria liquid bath 21 is injected degradation bacteria three grades of liquid injecting pipeline 1-3 between first electrodes 3 and the secondary electrodes 4 and degradation bacteria level Four liquid injecting pipeline 1-4 between secondary electrodes 4 and three grades of negative electrodes 5, wherein applied voltage gradient, liquid injecting pipeline injection speed, inject time, the multi-channel intelligent rolling counters forward time is all identical with step (2),
(5) by first class control system 11, secondary electrodes 4 is connected the positive pole of voltage-stabilized power supply 13, three grades of negative electrodes 5 connect the negative pole of voltage-stabilized power supply 13, run intelligent multi-channel counter 12, and the running time of secondary electrodes 4 and three grades of negative electrodes 5 is controlled by it, simultaneously by running level Four control system 22, liquid in degradation bacteria liquid bath 21 is injected the degradation bacteria level Four liquid injecting pipeline 1-4 between secondary electrodes 4 and three grades of negative electrodes 5, wherein executed voltage gradient is 1-2v/cm, liquid injecting pipeline injection speed is 1-2mL/min, inject time is 1.5-3h, multi-channel intelligent counter 12 gate time is 6-12h, in aforesaid operations, PRB reacts the petroleum pollution absorption that wall 24 will be enriched near three grades of negative electrodes 5, thus repair by the soil of oil pollution,
(6) in aforesaid operations, when electrode connects the positive pole of voltage-stabilized power supply 13, in the electrode chamber of counter electrode, anolyte is added by three grades of multi-channel peristaltic pumps 20 by three-stage control system 19, when electrode connects the negative pole of voltage-stabilized power supply 13, in the electrode chamber of counter electrode, add catholyte by three grades of multi-channel peristaltic pumps 20 by three-stage control system 19; When electrode operates, the pH in anode chamber is regulated to remain between 9-11, pH in cathode chamber remains between 3-5, constantly monitor the saturation degree of electrolyte in each electrode chamber simultaneously, by second control system 15, saturated electrolyte is drawn in electrolyte treatment trough 16 by secondary multi-channel peristaltic pump 14 by overflow pipe.
The method of electric driving method combined degradation bacterium repairing polluted soil is poured on above-mentioned a kind of surface, depending on the degree of depth of soil pollution, and the quantity of adjustment electrode, but need guarantee that the superiors' electrode is negative electrode, orlop electrode is anode.
The beneficial effect of the present patent application is: (1) described device adopts multiple control system, automatically can realize renewal and the process of electrode solution in electrode chamber, and the automatic injection of degradation bacteria, considerably reduces human cost; (2) intelligent counter and control system conbined usage, the automation greatly strengthening electrode uses, and decreases personnel demand amount, operation is become simple; (3), in repair process, adopting and pour into formula electric driving method reparation pollutant, by converting the use of electrode, petroleum pollution constantly being gushed out to upper soll layer, the convenient process to pollutant; (4) arrange degradation bacteria liquid injecting pipeline between adjacent electrodes, effectively promote the degraded of soil PetroChina Company Limited., and degradation bacteria is efficient, economy, safety, non-secondary pollution; (5) at upper soll layer ate electrode, PRB permeable reactive barrier is installed, the pollutant moving to top layer can be adsorbed efficiently, accelerate the speed of soil remediation.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that electric driving method combined degradation bacterium repairing polluted soil device is poured on a kind of surface.
Wherein each label is: 1-one-level anode, 2-secondary anode, 3-first electrodes, 4-secondary electrodes, 5-tri-grades of negative electrodes, 6-one-level anode chamber, 7-secondary anode chamber, 8-first electrodes room, 9-secondary electrodes room, 10-tri-grades of cathode chambers, 11-first class control system, 12-intelligent multi-channel counter, 13-voltage-stabilized power supply, 14-secondary multi-channel peristaltic pump, 15-second control system, 16-electrolyte treatment trough, 17-negative electrode liquid bath, 18-anode liquid bath, 19-three-stage control system, 20-tri-grades of multi-channel peristaltic pumps, 21-degradation bacteria liquid bath, 22-level Four control system, 23-single channel peristaltic pump, 24-PRB reacts wall, 1-1-one-level liquid injecting pipeline, 1-2-secondary liquid injecting pipeline, 1-3-tri-grades of liquid injecting pipelines, 1-4-level Four liquid injecting pipeline.
Detailed description of the invention
Below in conjunction with accompanying drawing and instantiation, the present invention will be further described:
A device for electric driving method combined degradation bacterium repairing polluted soil is poured on surface, as shown in Figure 1.This device comprises: one-level anode 1, secondary anode 2, first electrodes 3, secondary electrodes 4, three grades of negative electrodes 5, one-level anode chamber 6, secondary anode chamber 7, first electrodes room 8, secondary electrodes room 9, three grades of cathode chambers 10, first class control system 11, intelligent multi-channel counter 12, voltage-stabilized power supply 13, secondary multi-channel peristaltic pump 14, second control system 15, electrolyte treatment trough 16, negative electrode liquid bath 17, anode liquid bath 18, three-stage control system 19, three grades of multi-channel peristaltic pumps 20, degradation bacteria liquid bath 21, level Four control system 22, single channel peristaltic pump 23, PRB reacts wall 24 and degradation bacteria liquid injecting pipeline: one-level liquid injecting pipeline 1-1, secondary liquid injecting pipeline 1-2, three grades of liquid injecting pipeline 1-3 and level Four liquid injecting pipeline 1-4, described voltage-stabilized power supply 13 connects intelligent multi-channel counter 12 and first class control system 11 successively, is then connected with three grades of negative electrodes 5 with one-level anode 1, secondary anode 2, first electrodes 3, secondary electrodes 4 respectively, described one-level anode 1, secondary anode 2, first electrodes 3, secondary electrodes 4 and three grades of negative electrodes 5 are placed in one-level anode chamber 6, secondary anode chamber 7, first electrodes room 8, secondary electrodes room 9 and three grades of cathode chambers 10 respectively, described electrolyte treatment trough 16 connects second control system 15 and secondary multi-channel peristaltic pump 14 successively, then be connected with each electrode chamber respectively, described negative electrode liquid bath 17 is connected three-stage control system 19 and three grades of multi-channel peristaltic pumps 20 with anode liquid bath 18 successively with parallel way, is then connected with each electrode chamber respectively, between adjacent electrode room, install degradation bacteria liquid injecting pipeline successively, described degradation bacteria liquid bath 21 is connected with each degradation bacteria liquid injecting pipeline above-mentioned by level Four control system 22 and single channel peristaltic pump 23, shown PRB reacts wall 24 and is arranged near three grades of cathode chambers 10, and single unit system is in sealing state.
Utilize said apparatus to carry out method that electric driving method combined degradation bacterium repairing polluted soil is poured on surface, comprises the following steps:
(1) degree of depth of oil-polluted soils is investigated, when guaranteeing to cover all pollution ranges, the all parts of described device is installed, the direction being parallel to horizontal plane is from bottom to top evenly arranged five identical plate electrodes, lay degradation bacteria liquid injecting pipeline in adjacent two electrode centre positions, PRB is installed near three grades of cathode chambers 10 and reacts wall 24.
(2) positive pole of voltage-stabilized power supply 13 is connected by first class control system control one-level anode 1, first electrodes 3 connects the negative pole of voltage-stabilized power supply 13, run intelligent multi-channel counter 12, and the running time of one-level anode 1 and first electrodes 3 is controlled by it, simultaneously by running level Four control system 22, liquid in degradation bacteria liquid bath is injected the degradation bacteria one-level liquid injecting pipeline 1-1 between one-level anode 1 and secondary the anode 2 and degradation bacteria secondary liquid injecting pipeline 1-2 between secondary anode 2 and first electrodes 3, wherein executed voltage gradient is 1-3v/cm, liquid injecting pipeline injection speed is 5-10mL/min, inject time is 5-8h, multi-channel intelligent counter 12 gate time is 12-24h.
(3) positive pole of voltage-stabilized power supply 13 is connected by first class control system control secondary anode 2, secondary electrodes 4 connects the negative pole of voltage-stabilized power supply 13, run intelligent multi-channel counter 12, and the running time of secondary anode 2 and secondary electrodes 4 is controlled by it, simultaneously by running level Four control system 22, liquid in degradation bacteria liquid bath is injected the degradation bacteria secondary liquid injecting pipeline 1-2 between secondary anode 2 and the first electrodes 3 and three grades of liquid injecting pipeline 1-3 of the degradation bacteria between first electrodes 3 and secondary electrodes 4, wherein applied voltage gradient, liquid injecting pipeline injection speed, inject time, the multi-channel intelligent rolling counters forward time is all identical with step (2).
(4) positive pole of voltage-stabilized power supply 13 is connected by first class control system control first electrodes 3, control the negative pole that three grades of negative electrodes 5 connect voltage-stabilized power supply 13, run intelligent multi-channel counter 12, and the running time of first electrodes 3 and three grades of negative electrodes 5 is controlled by it, simultaneously by running level Four control system 22, liquid in degradation bacteria liquid bath is injected degradation bacteria three grades of liquid injecting pipeline 1-3 between first electrodes 3 and the secondary electrodes 4 and degradation bacteria level Four liquid injecting pipeline 1-4 between secondary electrodes 4 and three grades of negative electrodes 5, wherein applied voltage gradient, liquid injecting pipeline injection speed, inject time, the multi-channel intelligent rolling counters forward time is all identical with step (2).
(5) positive pole of voltage-stabilized power supply 13 is connected by first class control system control secondary electrodes 4, control the negative pole that three grades of negative electrodes 5 connect voltage-stabilized power supply 13, run intelligent multi-channel counter 12, and the running time of secondary electrodes 4 and three grades of negative electrodes 5 is controlled by it, simultaneously by running level Four control system 22, liquid in degradation bacteria liquid bath is injected the degradation bacteria level Four liquid injecting pipeline 1-4 between secondary electrodes 4 and three grades of negative electrodes 5, wherein executed voltage gradient is 1-2v/cm, liquid injecting pipeline injection speed is 1-2mL/min, inject time is stop after 1.5-3h, multi-channel intelligent counter 12 gate time is 6-12h, in aforesaid operations, PRB reacts wall and the petroleum pollution be enriched near three grades of negative electrodes 5 can be adsorbed, thus repair by the soil of oil pollution.
(6) in aforesaid operations, when electrode connects the positive pole of voltage-stabilized power supply 13, in the electrode chamber of counter electrode, anolyte is added by three grades of multi-channel peristaltic pumps 20 by three-stage control system, when electrode connects the negative pole of voltage-stabilized power supply 13, in the electrode chamber of counter electrode, catholyte is added by three grades of multi-channel peristaltic pumps 20 by three-stage control system 19, when electrode operates, the pH in anode chamber is regulated to remain between 9-11, pH in cathode chamber remains between 3-5, constantly monitor the saturation degree of electrolyte in each electrode chamber simultaneously, by second control system 15, saturated electrolyte is drawn in electrolyte treatment trough 16 by secondary multi-channel peristaltic pump 14 by overflow pipe.
Being easy to for making these apparatus and method understand, further illustrating the present invention below in conjunction with the drawings and specific embodiments.
The first step: preparation is for examination soil
Gather the soil sample of 150kg, by 1mm sieve aperture (i.e. No. 18 sieves), test configurations soil PetroChina Company Limited. pollution concentration is 1000mg/kg.
Second step: configuration degradation bacteria liquid
Take oil-polluted soils as raw material, 30 DEG C, carry out enrichment and domestication under 170r/min condition, being isolated by dilution spread and line screening can be the high efficient petroleum degrading bacteria that sole carbon source grows with oil again, use the centrifugal enrichment bacterium liquid obtaining bacterial classification of Shaking culture subsequently, use glucose agar medium subsequently, at 28 DEG C, under 160r/min constant temperature jolting condition, expansion is carried out to this bacterium liquid and cultivate, be prepared into degradation bacteria liquid, leave in degradation bacteria liquid bath 21.
3rd step: select PRB permeable reactive barrier
PRB reacts filled media within the walls and adopts coarse sand and immobilization peat (proportioning is 4:1), and specification is 35cm × 25cm × 3cm (L × W × H).
4th step: select electrolyte
The NaOH of configuration 0.05mol/L is as anolyte, and the citric acid of configuration 0.05mol/L is as catholyte.
5th step: the assembling of device and operation
150kg soil sample inserted in the lucite of 40cm × 30cm × 100cm, settle a plate shaped graphite electrode in vertical direction every 20cm, electrode specification is 35cm × 25cm × 5cm (L × W × H).Equipment needed thereby is arranged according to accompanying drawing 1 device installation instructions, and step operational outfit according to the method described above, wherein voltage gradient is for being 1V/cm, be the ratio injection degradation bacteria of 4% according to mass concentration in step 2-4, voltage gradient of executing is 1.5v/cm, degradation bacteria liquid injecting pipeline injection speed is 5mL/min, inject time is 5h, multi-channel intelligent counter 12 gate time is 12h, in step 5, voltage gradient of executing is 1v/cm, degradation bacteria liquid injecting pipeline injection speed is 1mL/min, inject time is 1.5h, multi-channel intelligent counter 12 gate time is after 6h, keep in whole repair process regulating the pH in anode chamber to be 10, pH in cathode chamber is 3.5.After the reparation of electric driving method combined degradation bacterium is poured on surface, the clearance of soil PetroChina Company Limited. can reach 92.3%.
The present invention adopts and pours into formula electric driving method reparation pollutant, by converting the use of electrode, petroleum pollution is constantly poured into upper soll layer, the degradation bacteria liquid injected between this technical tie-up adjacent electrode and the PRB for adsorbing petroleum pollution near top layer electrodes react wall, more contribute to the reparation speed of petroleum pollution.Adopt multiple control system and intelligence system in the present invention, considerably reduce human cost, make the more automation of whole process.
Claims (3)
1. a device for electric driving method combined degradation bacterium repairing polluted soil is poured on surface, it is characterized in that, described device comprises: one-level anode (1), secondary anode (2), first electrodes (3), secondary electrodes (4), three grades of negative electrodes (5), one-level anode chamber (6), secondary anode chamber (7), first electrodes room (8), secondary electrodes room (9), three grades of cathode chambers (10), first class control system (11), intelligent multi-channel counter (12), voltage-stabilized power supply (13), secondary multi-channel peristaltic pump (14), second control system (15), electrolyte treatment trough (16), negative electrode liquid bath (17), anode liquid bath (18), three-stage control system (19), three grades of multi-channel peristaltic pumps (20), degradation bacteria liquid bath (21), level Four control system (22), single channel peristaltic pump (23), PRB reacts wall (24) and degradation bacteria liquid injecting pipeline: one-level liquid injecting pipeline (1-1), secondary liquid injecting pipeline (1-2), three grades of liquid injecting pipelines (1-3) and level Four liquid injecting pipeline (1-4), whole device is in sealing state, described voltage-stabilized power supply connects intelligent multi-channel counter and first class control system successively, is then connected with three grades of negative electrodes with one-level anode, secondary anode, first electrodes, secondary electrodes respectively, described one-level anode, secondary anode, first electrodes, secondary electrodes and three grades of negative electrodes are placed in each respective electrode room respectively, described electrolyte treatment trough connects second control system and secondary multi-channel peristaltic pump successively, then be connected with each electrode chamber respectively, described negative electrode liquid bath is connected three-stage control system and three grades of multi-channel peristaltic pumps with anode liquid bath successively with parallel way, is then connected with each electrode chamber respectively, between adjacent electrode room, install degradation bacteria liquid injecting pipeline successively, described degradation bacteria liquid bath is connected with each degradation bacteria liquid injecting pipeline above-mentioned by level Four control system and single channel peristaltic pump, described PRB reacts wall and is arranged near three grades of cathode chambers.
2. utilize a method for device repairing polluted soil described in claim 1, it is characterized in that, said method comprising the steps of:
(1) degree of depth of oil-polluted soils is investigated, when guaranteeing to cover all pollution ranges, the all parts of described device is installed, the direction being parallel to horizontal plane is from bottom to top evenly arranged five identical plate electrodes, lay degradation bacteria liquid injecting pipeline in adjacent two electrode centre positions, PRB is installed near three grades of cathode chambers and reacts wall;
(2) by first class control system, one-level anode is connected to the positive pole of voltage-stabilized power supply, first electrodes is connected to the negative pole of voltage-stabilized power supply, run intelligent multi-channel counter, and the running time of one-level anode and first electrodes is controlled by it, run by level Four control system simultaneously, liquid in degradation bacteria liquid bath is injected the degradation bacteria one-level liquid injecting pipeline between one-level anode and secondary anode and the degradation bacteria secondary liquid injecting pipeline between secondary anode and first electrodes, wherein executed voltage gradient is 1-3v/cm, liquid injecting pipeline injection speed is 5-10mL/min, inject time is 5-8h, the multi-channel intelligent rolling counters forward time is 12-24h,
(3) by first class control system, secondary anode is connected to the positive pole of voltage-stabilized power supply, secondary electrodes is connected to the negative pole of voltage-stabilized power supply, run intelligent multi-channel counter, and the running time of secondary anode and secondary electrodes is controlled by it, run by level Four control system simultaneously, liquid in degradation bacteria liquid bath is injected the degradation bacteria secondary liquid injecting pipeline between secondary anode and first electrodes and the degradation bacteria three grades of liquid injecting pipelines between first electrodes and secondary electrodes, wherein applied voltage gradient, liquid injecting pipeline injection speed, inject time, the multi-channel intelligent rolling counters forward time is all identical with step (2),
(4) by first class control system, first electrodes is connected to the positive pole of voltage-stabilized power supply, three grades of negative electrodes are connected to the negative pole of voltage-stabilized power supply, run intelligent multi-channel counter, and the running time of first electrodes and three grades of negative electrodes is controlled by it, run by level Four control system simultaneously, liquid in degradation bacteria liquid bath is injected the degradation bacteria three grades of liquid injecting pipelines between first electrodes and secondary electrodes and the degradation bacteria level Four liquid injecting pipeline between secondary electrodes and three grades of negative electrodes, wherein applied voltage gradient, liquid injecting pipeline injection speed, inject time, the multi-channel intelligent rolling counters forward time is all identical with step (2),
(5) by first class control system, secondary electrodes is connected the positive pole of voltage-stabilized power supply, three grades of negative electrodes connect the negative pole of voltage-stabilized power supply, run intelligent multi-channel counter, and the running time of secondary electrodes and three grades of negative electrodes is controlled by it, run by level Four control system simultaneously, liquid in degradation bacteria liquid bath is injected the degradation bacteria level Four liquid injecting pipeline between secondary electrodes and three grades of negative electrodes, wherein executed voltage gradient is 1-2v/cm, liquid injecting pipeline injection speed is 1-2mL/min, inject time is 1.5-3h, the multi-channel intelligent rolling counters forward time is 6-12h, in aforesaid operations, PRB reacts the petroleum pollution absorption that wall will be enriched near three grades of negative electrodes, thus repair by the soil of oil pollution,
(6) in aforesaid operations, when electrode connects the positive pole of voltage-stabilized power supply, in the electrode chamber of counter electrode, anolyte is added by three grades of multi-channel peristaltic pumps by three-stage control system, when electrode connects the negative pole of voltage-stabilized power supply, in the electrode chamber of counter electrode, add catholyte by three grades of multi-channel peristaltic pumps by three-stage control system; When electrode operates, the pH in anode chamber is regulated to remain between 9-11, pH in cathode chamber remains between 3-5, constantly monitor the saturation degree of electrolyte in each electrode chamber simultaneously, by second control system, saturated electrolyte is drawn in electrolyte treatment trough by secondary multi-channel peristaltic pump by overflow pipe.
3. method according to claim 2, is characterized in that, depending on the degree of depth of soil pollution, and the quantity of adjustment electrode, but need guarantee that the superiors' electrode is negative electrode, orlop electrode is anode.
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