A kind of device of renovation of organic pollution soil
Technical field
The utility model is related to a kind of device of renovation of organic pollution soil, more particularly to it is a kind of based on bioelectrochemistry,
The device of the renovation of organic pollution soil of adsorption particle and efficient pollutant degradation flora.
Background technology
According to publication in 2014《National Soil Pollution Investigation bulletin》, Chinese soil environmental aspect do not allow totally to find pleasure in
It sees, national soil pollution exceeding standard rate is up to 16.1%.The whole nation by organic contaminants farmland up to 36,000,000 hectares, pollutant
Type includes petroleum-type, polycyclic aromatic hydrocarbon, pesticide, organochlorine etc.;Serious oil pollution land area is up to 1 caused by oilfield exploitation
Ten thousand hectares, oil refining industry is also contaminated large area soil.Chinese soil pollution to Sustainable Use of Soil Resources with
Agricultural product ecological safety constitutes a threat to.
What in March, 2012 put into effect《" 12th Five-Year Plan " planning outline》By energy conservation and environmental protection be classified as seven great strategy new industries it
It is first.Wherein, soil remediation be environmental protection industry the row given priority to and clearly propose need to strengthen Soil Pollution Control supervision pipe
Reason.Compared to showering technology, based technique for in-situ remediation have without dig muck haulage earth, rehabilitation cost it is low, suitable for being polluted to deep layer
Medium reparation, it is small to construction personnel's health effect the features such as.Therefore, to the mankind or environmental health, there are shadows except non-polluting
It rings, in-situ immobilization contaminated soil should be used.
Biological in-situ reparation is a kind of method that cost-effectiveness height and Noninvasive handle soil polluted by organic matter.In order to
Biology in situ repairing effect is improved, generally use biological reinforcing technology such as supplements single-minded, efficient microbial population, is added with
Conducive to the nutriment of promotion microbial degradation effect.It is CO that organic pollution, which wants thorough oxygenolysis,2And H2O, which is needed, to be filled
The electron acceptor of foot, such as O2、NO3 -And SO4 2-Deng the extra electronics of receiving.Therefore, biologic treating technique is limited to electron donor
Deficiency, often treatment effect is bad.
Biological fuel cell technology is the alternative of enhanced biological processing organic pollution.In galvanic anode organic contamination
Object is aoxidized as electron donor by electricity-producing microorganism, the electronics transfer of generation to extracellular, by circuit battery cathode by O2
It is reduced into H2O.Currently, biological fuel cell technology is applied in soil remediation, but it is in soil organic matter processing
Application be subject to many limitations, such as the moisture content of soil wants the pollutant of low, only degradable close electrode.
Utility model content
Purpose of utility model:The utility model bad, biological fuel cell for existing biologic treating technique treatment effect
The problems such as technology application is limited, provides a kind of device of renovation of organic pollution soil.
Technical solution:The device of renovation of organic pollution soil described in the utility model, including it is used for decomposition of organic matter
Or the barrel of organic pollution, bottom are equipped with to pierce the cone portion of underground;The barrel includes what intussusception was arranged
Inner barrel and outer barrel, outer barrel barrel are equipped with the hole penetrated into for organic substance and organic pollution, inner cylinder barrel and outer barrel barrel
Between absorbability particle and degrading organic pollutant equipped with adsorbable organic substance and organic pollution micropopulation
Mixed culture, and graphite rod is equipped in absorbability particle;The inner cylinder is made of an electrically conducting material, inner cylinder barrel be equipped with for
And the organic substance decomposed and the hole penetrated into water of organic pollution, and oxygen is not provided on inner cylinder barrel, the graphite rod with
Absorbability particle collectively forms biological anode, forms biological fuel cell between the inner cylinder barrel as air cathode, is used for
The electronics and H generated in transfer degradation process+;The draining system that the water for that will penetrate into inner cylinder is discharged is additionally provided with inside the inner cylinder
System.
Specifically, drainage system includes water level sensor and drainpipe, inner cylinder bottom is stretched into drainpipe one end, and the other end is stretched
Go out outside device, for being connect with draining pump, after water level exceeds water level sensor in inner cylinder, drains pump startup, oozed in soil
Enter the water of inner cylinder by drainpipe discharger outside.
The device may also include the oxygen system that oxygen is provided for inner cylinder barrel, the oxygen system include air intake duct,
Exhaust pipe and the distribution device in inner cylinder, air intake duct one end are stretched into inner cylinder, are connect with distribution device, the other end
Extending apparatus is outer, is used to connect with air feed pump;Exhaust pipe one end is stretched into inner cylinder, is connected to outside the other end and device.
Preferably, be covered on outer tube inner wall can prevent microorganism by, allow water and organic contamination by filter membrane.
Further, the aperture of filter membrane is less than or equal to 0.2 μm.
Absorbability particle between inner cylinder barrel and outer barrel barrel preferably has high-specific surface area ratio, such as biomass carbon.
Preferably, inner cylinder can be made of the metal material with mesh, such as the stainless steel with mesh.Outer barrel is it is also preferred that using band
The stainless steel of mesh is made.
Outer barrel and inner cylinder can be cylindrical tube, as a preferred embodiment, outer barrel diameter 20-30cm, inner diameter of steel flue
For 8-15cm, cylinder height is 50-100cm.
Operation principle:The present apparatus is placed in contaminated soil layer, the organic matter and pollutant in soil can pass through outer barrel
Hole and filter membrane on wall enter device.It is the adsorptivity of absorption organic substance and organic pollution between outer tube wall and inner tube wall
Grain, and efficient organic matter degradation microorganism species, while adsorbing organic substance and organic pollution, absorbability particle
With graphite rod as biological anode by electronics and H extra during organic matter degradation+Be transferred to inner cylinder barrel (cathode) with it is interior
Oxygen in cylinder, which reacts, generates H2O, electronics and H+Transfer be conducive to further drop of the microorganism species to organic substance
Solution;Not and decompose organic substance and organic pollution with water penetrate into inner cylinder in, after running up to certain altitude trigger water level sense
Device is answered, drainage system is started, by the soil outside the water discharge device in inner cylinder, circular treatment is until up to standard.
Advantageous effect:Compared with prior art, the utility model has the advantage of:The renovation of organic pollution of the utility model
The device of soil is based on bioelectrochemistry, adsorption particle and efficient contaminant degradation flora, can be to organic dirt in soil
Dye carries out circular treatment, efficiently repairs underground water and contaminated soil, while reducing rehabilitation expense;Moreover, the device can be located
It manages different types of organic pollution, be suitable for different humidity and soil types.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the device of renovation of organic pollution soil of the utility model;
Fig. 2 is the COD content balance figures in soil diffusate after the device of 1 the utility model of embodiment is handled;
Fig. 3 is the COD content balance figures in soil diffusate after the device of 2 the utility model of embodiment is handled.
Specific implementation mode
The technical solution of the utility model is described further with reference to the accompanying drawings and embodiments.
Such as Fig. 1, a kind of device of renovation of organic pollution soil of the utility model, including barrel and cone portion 8, cylinder
Portion uses double-layer sleeve structure, is used for decomposition of organic matter or organic pollution;Cone portion 8 is the taper positioned at barrel bottom
Structure, convenient for whole device is pierced underground.
Barrel includes the outer barrel 1 and inner cylinder 2 of intussusception setting, and outer barrel 1 and inner cylinder 2 can be cylindrical tube, cone portion 8
Can be cone, whole device is in the cylinder that bottom is taper.Recommendation is designed as the following size:1 a diameter of 20- of outer barrel
30cm, 2 a diameter of 8-15cm of inner cylinder, cylinder height are 50-100cm.
There is hole on 1 barrel of outer barrel, penetrated into for organic substance and organic pollution, preferably uses the metal material with mesh
It is made, the stainless steel with mesh such as can be used, outer barrel is made.
The mixed culture 3 of absorbability particle and micropopulation is housed, containing rich between 1 barrel of 2 barrel of inner cylinder and outer barrel
Rich organic matter decomposes flora;Wherein, micropopulation forms biomembrane on absorbability particle surface, and absorbability particle is for adsorbing
Organic substance and organic pollution, micropopulation degrading organic pollutant;Absorbability particle can have high specific surface area ratio,
Biomass carbon such as can be selected, adsorption effect is excellent;Graphite rod 5, graphite rod 5 and adsorptivity can be inserted in absorbability particle layer
Grain can collectively form biological anode.To prevent the microorganism between inner cylinder barrel and outer barrel barrel to be contaminated, on 1 inner wall of outer barrel
Filter membrane 4 can be set, prevent passing through for microorganism, but allow water and organic contamination that can penetrate;The aperture of filter membrane 4 be generally less than or
Equal to 0.2 μm.
Inner cylinder 2 is made of conductive material, has hole on 2 barrel of inner cylinder, for not and the organic substance decomposed and organic contamination
Object is penetrated into water, the stainless steel with mesh such as can be used, inner cylinder is made;Oxygen, graphite rod 5 and inner cylinder 2 are provided on 2 barrel of inner cylinder
It is connected by circuit before barrel, constitutes biological fuel cell, wherein 2 barrel of inner cylinder is as air cathode, graphite rod 5 and suction
Attached property particle collectively forms biological anode;The H that anode microorganism generates during degradation of organic substances+With electronics transfer to inner cylinder
2 barrels, by the oxygen reduction Cheng Shui on 2 wall of inner cylinder.
Oxygen on 2 barrel of inner cylinder can be provided by oxygen system, and oxygen system includes air intake duct 9, distribution device
7 and exhaust pipe 10, distribution device 7 be located in inner cylinder, 9 one end extending apparatus of air intake duct is outer, is connect with air feed pump, the other end
Connect distribution device 7;10 one end of exhaust pipe is stretched into inner cylinder 2, is connected to outside the other end and device.
2 inside of inner cylinder can also be equipped with drainage system, for the water for penetrating into inner cylinder in soil to be discharged.Drainage system may include
Water level sensor 6 and drainpipe 11, drainpipe 11 can be connect with the draining pump outside device, when water level exceeds water level in inner cylinder 2
After inductor 6, pump startup is drained, the water that inner cylinder is penetrated into soil is discharged by drainpipe 11.Drainage system may also include control
System, control system are connect with water level sensor 6 and draining pump, water level sensor 6 by the water level information measured by wireless or
Wire transmission mode is transferred to control system, and control system sends out control instruction, control draining pump startup, by inner cylinder to draining pump
Water in 2 is discharged from drainpipe 11.
Operation principle:The device of the reparation organic soil of the utility model is placed in contaminated soil layer, in soil
Organic matter and pollutant can enter device by hole on 1 wall of outer barrel and filter membrane 4.It is suction between 2 barrel of 1 barrel of outer barrel and inner cylinder
The absorbability particle and efficient organic matter degradation microorganism species of attached organic substance and organic pollution, in absorption organic matter
While matter and organic pollution, absorbability particle and graphite rod are as biological anode by electricity extra during organic matter degradation
Son and H+It is transferred to 2 barrel of inner cylinder (cathode), reacting with the oxygen in inner cylinder generates H2O, electronics and H+Transfer be conducive to
Further degradation of the microorganism to organic substance in absorbability particle layer;Not and decompose organic substance and organic pollution with
Water penetrates into inner cylinder 2, and water level sensor 6 is triggered after running up to certain altitude, starts drainage system, and the water in inner cylinder 2 is arranged
Go out in the soil outside device, circular treatment is until up to standard.
Embodiment 1
Certain paper waste irrigating region, the COD contents in subsoil soil diffusate are 3697mg/L.
By the device of the renovation of organic pollution soil of the utility model, (outer barrel diameter 25cm, inner diameter of steel flue 10cm, cylinder are high
60cm;The biomass carbon of the microorganism species after inoculation paper waste domestication is filled between outer tube wall and inner tube wall) pierce ground
Table 20cm is hereinafter, be arranged 4 devices in every square metre of soil.COD value in periodic detection diffusate, with untreated soil
COD contents in earth diffusate are compared, as a result such as Fig. 2;It can be seen that after the processing of the device of the utility model, soil
COD contents in diffusate significantly reduce.
Embodiment 2
Certain is in by DDT contaminated soils, and the content of DDT is 1.07mg/kg in 30cm soil under earth's surface.
By the device of the renovation of organic pollution soil of the utility model, (outer barrel diameter 25cm, inner diameter of steel flue 10cm, cylinder are high
60cm;The biomass carbon of inoculation DDT acclimated microorganism floras is filled between outer tube wall and inner tube wall) it is placed in 20cm under earth's surface,
4 devices are set in every square metre of soil.DDT contents in periodic detection soil in DDT contents, with untreated soil
Compare, as a result such as Fig. 3;It can be seen that DDT contents are greatly reduced in the processed soil of device through the utility model.