CN109248914A - A kind of biological renovation method and device of organic polluted soil - Google Patents
A kind of biological renovation method and device of organic polluted soil Download PDFInfo
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- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
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Abstract
The invention discloses a kind of biological renovation methods of organic polluted soil, include the following steps: the pretreatment of (i) organic polluted soil: being mixed into nutrients to organic polluted soil, the weight ratio of organic polluted soil and nutrients is 1000:0.1-0.5；(ii) heap of organic polluted soil heap body is built: pretreated organic polluted soil heap being built up organic polluted soil heap body, organic polluted soil heap external surface covers rain-proof cover；(iii) intracorporal 20-25 DEG C of the temperature of organic polluted soil heap, air draught amount 0.5-1.0m the compost processing of organic polluted soil heap body: are kept in compost treatment process3/ h, moisture content 5-20%.The present invention also provides a kind of biological prosthetic devices of organic polluted soil.It not only has the advantages that high remediation efficiency, but also realizes the high efficiency reparation under commercial scale to chemical products polycyclic aromatic hydrocarbon pollution.
Description
Technical field
The present invention relates to contaminated soil remediation technical fields, more specifically, it is related to a kind of life of organic polluted soil
Object restorative procedure and device.
Background technique
As society and industrial development, soil and underground water and wastewater industry and agricultural pollution are gradually serious, soil texture and ecology
Environment is seriously damaged, and quality of groundwater deteriorates, this does not only result in agricultural production and is affected, more to the mankind and ecological environment
Grave danger is brought, therefore soil remediation is a current vital task urgently to be resolved.China's soil is generally polluted, portion
Region-by-region soil pollution is serious, and primary pollution is heavy metal pollution, is secondly organic pollution.
The main species of China's soil organic pollutant include: petroleum hydrocarbon class pollutant, halogenated hydrocarbon pollutant, pesticide
The organic pollutants such as pollutant, polycyclic aromatic hydrocarbon, Polychlorinated biphenyls, dioxin, phthalic acid ester.Wherein, soil polycyclic aromatic hydrocarbon
(polycyclicaromatichydrocarbons, PAHs) pollution has become a common problem, and PAHs is mainly derived from coal
The production process of charcoal gasification, wood preservation and petroleum product, because it is with carcinogenicity, teratogenesis, mutagenicity, Environmental Protection in America
Office is included in 16 kinds of PAHs in priority acccess control toxic organic pollutant blacklist.So far, China is shut down because of a variety of causes
Coal chemical enterprise be more than 1000, the concern of more and more people has been caused with the reparation that PAHs is main contaminated site to this kind of.
Currently, the reparation for this kind of contaminated site, mainly includes physics, chemistry and bioremediation technology.Wherein, biological
Recovery technique because its rehabilitation cost is low, do not destroy plant growth needed for soil environment the advantages that have become current research heat
Point.Biological heap technique is due to providing oxygen, system oxygen supply by mechanical forced ventilation (or pumping) for Soil Microorganism
Abundance is easy to regulate and control, and individual unit treatment scale is larger, for handling the biggish contaminated soil of volume, has certain advantage.
But it is domestic about the research report that chemical products PAHs contaminated soil is repaired using biological heap technology under commercial scale compared with
It is few.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of the biological prosthetic of organic polluted soil
Method not only has the advantages that high remediation efficiency, but also realizes under commercial scale to chemical products polycyclic aromatic hydrocarbon pollution
High efficiency reparation.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of biological renovation method of organic polluted soil, includes the following steps:
(i) nutrients, the weight of organic polluted soil and nutrients the pretreatment of organic polluted soil: are mixed into organic polluted soil
Amount is than being 1000:0.1-0.5；
(ii) heap of organic polluted soil heap body is built: pretreated organic polluted soil heap is built up organic polluted soil heap
Body, organic polluted soil heap external surface cover rain-proof cover；
(iii) the compost processing of organic polluted soil heap body: keep organic polluted soil heap intracorporal in compost treatment process
20-25 DEG C of temperature, air draught amount 0.5-1.0m3/ h, moisture content 5-20%.
By using above-mentioned technical proposal, the intracorporal air circulation of organic polluted soil heap may make organic polluted soil
The indigenous bacterium of heap body contacts extraneous oxygen, and aerobic microorganisms is made to have carried out oxide growth, and then degrading polyaromatic hydrocarbon pollutant
The aerobic microorganisms degradation intracorporal polycyclic aromatic hydrocarbon pollutant of organic polluted soil heap, and the addition of nutrients can be aerobic micro- life
Object provides nutriment, accelerates aerobic microorganisms growth, improves the intracorporal aerobic microorganisms content of organic polluted soil heap, in turn
Improve the biological prosthetic efficiency of organic polluted soil.Remediation efficiency improves, and then can realize under commercial scale to chemical products
The high efficiency reparation of polycyclic aromatic hydrocarbon pollution.
Further, the nutrients include 80-100 parts of organic acid carbon source based on parts by weight, 9-11 parts of urea and
0.5-2 parts of potassium dihydrogen phosphate.
By using above-mentioned technical proposal, nutriment C, N, P are provided for aerobic microorganisms, it is raw to accelerate aerobic microorganisms
It is long, the intracorporal aerobic microorganisms content of organic polluted soil heap is improved, and then improve the biological prosthetic effect of organic polluted soil
Rate.
Further, the organic acid carbon source is selected from least one of lactic acid, citric acid, fatty acid.
Further, the pretreatment of step (i) organic polluted soil further includes being mixed into be loaded with microorganism to organic polluted soil
Charcoal, organic polluted soil and be loaded with microorganism charcoal weight ratio be 1000:2-10.
By using above-mentioned technical proposal, the charcoal for being loaded with microorganism can strengthen reparation polycyclic aromatic hydrocarbon pollutant.
Further, the charcoal for being loaded with microorganism is prepared using following methods:
Cellulose and deionized water are warming up to 500-700 DEG C, insulation reaction 5-10min in confined conditions, cool down, filter,
Charcoal is dried to obtain, wherein the weight ratio of cellulose and deionized water is 300:5-10；
By charcoal, Pseudomonas stutzeri freeze-dried powder and enterobacter cloacae freeze-dried powder be added to by organic acid carbon source, urea and
It mixes in mixed liquor made from potassium dihydrogen phosphate and water, static 20-30h, air-dries under the conditions of temperature is 5-10 DEG C to get being loaded with
The charcoal of microorganism；The wherein weight ratio of charcoal, Pseudomonas stutzeri freeze-dried powder, enterobacter cloacae freeze-dried powder and mixed liquor
For 30-50:1-5:1-5:50-100；The mixed liquor includes organic acid carbon source 30-50 parts by weight, urea 3-5 parts by weight, phosphorus
1000 parts by weight of acid dihydride potassium 0.5-1 parts by weight and water.
By using above-mentioned technical proposal, due to the charcoal of different materials and the different equal shadows of the preparation condition of charcoal
The degradation effect to polycyclic aromatic hydrocarbon pollutant is rung, can effectively be enhanced to more using the charcoal provided by the invention for being loaded with microorganism
The degradation effect of cyclophane hydrocarbon pollutant.
It is an object of the invention to also provide a kind of the organic of the biological renovation method suitable for above-mentioned organic polluted soil
The biological prosthetic device of contaminated soil, not only has the advantages that high remediation efficiency, but also realizes under commercial scale to coking
The high efficiency reparation of class polycyclic aromatic hydrocarbon pollution.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of biological prosthetic device of organic polluted soil, including soil stack ground, and the soil stacks ground from the bottom to top
It is equipped with porous material layer and organic polluted soil heap body；
Exhaust tube is preset in the porous material layer, the porous material layer, the pumping are extended in one end of the exhaust tube
Tracheae offers several aspirating holes in the one end being located in the porous material layer, and the exhaust tube extends the porous material
One end outside layer is communicated with supervisor, and the supervisor is communicated with gas-liquid separator, aspiration pump, tail gas clean-up by the way that pipeline is in sequential series
Device, exhaust pipe；Ventilation duct is provided in the organic polluted soil heap body, one end of the ventilation duct is located at organic contamination soil
It is external that earth heap body is interior, the other end is located at organic polluted soil heap；
The outer surface of the organic polluted soil heap body is equipped with water supply pipe in advance, and the water supply pipe passes through pipeline connection in sequential series
There are the first water pump, water tank；
The outer surface of the organic polluted soil heap body is covered with rain-proof cover, and the ventilation duct runs through the rain-proof cover.
By using above-mentioned technical proposal, under the action of aspiration pump, air enters organic contamination soil by snorkel
Earth heap body, to make to contact extraneous oxygen in the intracorporal microorganism of organic polluted soil heap, accelerating microorganism has oxide growth, in turn
Improve degradation of the microorganism to polycyclic aromatic hydrocarbon pollutant.Furthermore after air enters organic polluted soil heap body, it is possible to carry
Pollutant is extracted, and the air for carrying pollutant enters supervisor by exhaust column, then carries out gas-liquid point by gas-liquid separator
From entering exhaust gas cleaner by aspiration pump and purify the air for carrying pollutant, purified air is through exhaust pipe
Discharge.Meanwhile the first water pump is opened, the water of water tank is pumped to water supply pipe by the first water pump, and water supply pipe is by water to organic contamination
To keep humidity in soil heap body, under the action of aspiration pump, water enters supervisor by exhaust tube, then passes through gas-liquid separator
It is left in gas-liquid separator after carrying out gas-liquid separation, accelerates osmotic efficiency of the water on organic polluted soil heap body to guarantee to have
Humidity is not much different everywhere in machine contaminated soil heap body, to improve biological bacteria to the decomposition efficiency of organic polluted soil heap body.Cause
This, the present invention not only increases organic polluted soil heap body remediation efficiency, and realizes polycyclic to chemical products under commercial scale
The high efficiency reparation of aromatic hydrocarbons contaminated soil.
Further, the exhaust tube is more, and the exhaust tube is along the setting of the radial level direction of supervisor, the more pumpings
Tracheae is sequentially arranged along the axial direction of supervisor and the more exhaust tubes are located at the ipsilateral of the supervisor.
By using above-mentioned technical proposal, increase exhausting area, guarantees that organic polluted soil inner air flow is uniform, thus
Guarantee that microorganism is uniform in organic polluted soil heap tumor growth, and then guarantees that effect is repaired at each position in organic polluted soil heap body
The consistency of fruit.
Further, the periphery of the organic polluted soil heap body is provided with leachate collection system.
By using above-mentioned technical proposal, so that original moisture or later period rainwater pass through infiltration in organic polluted soil heap body
Moisture is collected and is discharged in time by filtrate collection system.
Further, the leachate collection system includes block water platform and rhone, platform and the rhone composition of blocking water
Closed path positioned at organic polluted soil heap body periphery, the rhone are communicated with collecting-tank.
By using above-mentioned technical proposal, block water platform by original moisture in organic polluted soil heap body or later period rainwater into
Row barrier, the moisture or rainwater being blocked enter rhone, and are discharged by rhone, then flow into collecting-tank and are received
Collection finally carries out purified treatment to the water of collection, and the water for carrying pollutant is prevented to be directly discharged into external environment and cause to soil
The case where earth generation secondary pollution, occurs.
Further, the porous material layer and soil stacking ground are also covered with impervious barrier in advance.
By using above-mentioned technical proposal, the moisture in organic polluted soil heap body, which carries pollutant, may penetrate into soil
It stacks in ground, impervious barrier can prevent pollutant from penetrating into soil stacking ground, prevent from stacking soil ground generation pollution
The case where occur.
In conclusion the invention has the following advantages:
The first, a kind of biological renovation method of organic polluted soil provided by the invention, the micro- life of original inhabitants in organic polluted soil
Under the action of object, addition nutrients accelerates the degradation of most of polycyclic aromatic hydrocarbon pollutant, and wherein the degradation rate of benzo (a) pyrene is equal
70% or more, and then the high efficiency reparation under commercial scale to chemical products polycyclic aromatic hydrocarbon pollution may be implemented.Into one
Step ground, the charcoal for being loaded with microorganism can strengthen reparation polycyclic aromatic hydrocarbon pollutant, in organic polluted soil indigenous microorganism and
It is loaded under the synergistic effect of the charcoal of microorganism, accelerates the degradation of most pollutants.
Third, a kind of biological prosthetic device of organic polluted soil provided by the invention, for adapting to above-mentioned organic contamination
The biological renovation method of soil, under the action of aspiration pump, air enters organic polluted soil heap body by snorkel, thus
Make to contact extraneous oxygen in the intracorporal microorganism of organic polluted soil heap, accelerating microorganism has oxide growth, and then improves micro- life
Degradation of the object to polycyclic aromatic hydrocarbon pollutant.Furthermore after air enters organic polluted soil heap body, it is possible to carry pollutant and be taken out
Out, the air for carrying pollutant enters supervisor by exhaust column, then gas-liquid separation is carried out by gas-liquid separator, by pumping
Pump enters exhaust gas cleaner and purifies the air for carrying pollutant, and purified air is through emission by exhaust pipe.Meanwhile it opening
Open the first water pump, the water of water tank is pumped to water supply pipe by the first water pump, water supply pipe by water to organic polluted soil heap body with
Humidity is kept, under the action of aspiration pump, water enters supervisor by exhaust tube, then carries out gas-liquid separation by gas-liquid separator
After be left in gas-liquid separator, accelerate osmotic efficiency of the water on organic polluted soil heap body to guarantee organic polluted soil heap
Humidity is not much different everywhere in vivo, to improve biological bacteria to the decomposition efficiency of organic polluted soil heap body.Therefore, the present invention is not only
Organic polluted soil heap body remediation efficiency is improved, and is realized under commercial scale to chemical products polycyclic aromatic hydrocarbon pollution
High efficiency reparation.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the biological prosthetic device of organic polluted soil of the present invention.
Appended drawing reference: 1, soil stacks ground；2, impervious barrier；3, porous material layer；4, organic polluted soil heap body；5, prevent
Rain layer；6, water tank；7, the first water pump；8, water supply pipe；9, ventilation duct；10, exhaust tube；11, it is responsible for；12, gas-liquid separator；
13, flowmeter；14, pressure gauge；15, aspiration pump；16, exhaust gas cleaner；17, exhaust pipe；18, the second water pump；19, it blocks water
Platform；20, rhone.
Specific embodiment
Invention is further described in detail with reference to embodiments.It should be understood that described in the embodiment of the present invention
Preparation method is only used for illustrating the present invention, rather than limiting the invention, to this hair under concept thereof of the invention
The simple modifications of bright preparation method belong to the scope of protection of present invention.
Embodiment 1
The biological stack device of a kind of organic polluted soil heap body reparation, as shown in Figure 1, including that soil stacks ground 1, soil is stacked
Ground 1 is equipped with impervious barrier 2, porous material layer 3 and organic polluted soil heap body 4 from the bottom to top, organic polluted soil heap body 4
Outer surface is covered with rain-proof cover 5.Specifically, it is that concrete stacks ground that soil, which stacks ground 1, and impervious barrier 2 is the first HDPE soil
Work film, porous material layer 3 are metalling, and rain-proof cover 5 is the 2nd HDPE geomembrane.
More exhaust tubes 10 are preset in porous material layer 3, the quantity of specific exhaust tube 10 is according to organic polluted soil heap
Depending on the size of body 4.The porous material layer 3 is extended in one end of exhaust tube 10, and exhaust tube 10 is located in porous material layer 3
One end is evenly equipped with aspirating hole (aspirating hole is being not shown in the figure), and more exhaust tubes 10 extend the company of one end outside porous material layer 3
It is connected with a supervisor 11, exhaust tube 10 is arranged along the radial level direction of supervisor 11, axial direction of the more exhaust tubes 10 along supervisor 11
Direction is sequentially arranged and more exhaust tubes 10 are located at the ipsilateral of supervisor 11.Supervisor 11 is communicated with gas-liquid point by the way that pipeline is in sequential series
From device 12, aspiration pump 15, exhaust gas cleaner 16, exhaust pipe 17.Wherein, between gas-liquid separator 12 and aspiration pump 15
Pipe installing has flowmeter 13 and pressure gauge 14, and exhaust gas cleaner 16 is set as absorbent charcoal adsorption tank.
The outer surface of organic polluted soil heap body 4 is equipped with water supply pipe 8 in advance, and water supply pipe 8 passes through pipeline connection in sequential series
There are the first water pump 7, water tank 6 and the second water pump 18, the second water pump 18 is connected on gas-liquid separator 12 by pipeline, organic dirt
It is provided with ventilation duct 9 in dye soil heap body 4, the quantity of specific ventilation duct 9 is depending on the size of organic polluted soil heap body 4.
Ventilation duct 9 is in being vertically arranged, and one end of ventilation duct 9 is located in organic polluted soil heap body 4, the other end is located at organic polluted soil
Outside heap body 4, correspondingly, rain-proof cover 5 offers the via hole passed through for ventilation duct 9 (via hole is being not shown in the figure).
The periphery of organic polluted soil heap body 4 is provided with leachate collection system.Leachate collection system includes the platform that blocks water
19 and rhone 20, it blocks water platform 19 and rhone 20 constitutes the closed path for being located at 4 periphery of organic polluted soil heap body, rhone
20 are communicated with collecting-tank, wherein collecting-tank is excavated the periphery in organic polluted soil heap body 4 and smeared using non-pervious concrete extension
The inner wall of collecting-tank.
Organic polluted soil heap body 4 specifically to build mode as follows: stacked in soil and overlay impervious barrier 2 on ground 1, later
Uniformly be covered with five 4 meters long of exhaust tube 10 in advance again, between adjacent exhaust tube 10 between be divided into 0.8 meter, five exhaust tubes 10 connect
It is connected on supervisor 11, exhaust tube 10 is wrapped up using rubble, prevents the soil clogging aspirating hole of organic polluted soil heap body 4.It
Afterwards, organic polluted soil is pre-processed, then heap build up truncated rectangular pyramids shape organic polluted soil heap body 4 (bottom surface be 6 meters ×
4 meters, top surface is 3 meters × 1 meter, 1.5 meters high), later, three ventilation ducts are uniformly inserted into the top surface of organic polluted soil heap body 4
9, the outer surface of organic polluted soil heap body 4 is laid with water supply pipe 8, and specifically, water supply pipe 8 is the PVC hose of internal diameter D12mm, so
The outer surface of organic polluted soil heap body 4 is laid with rain-proof cover 5 afterwards.
The organic polluted soil heap body reparation is as follows with use the principle of biological stack device: unlatching aspiration pump 15, starts pair
Organic polluted soil heap body 4 carries out exhausting, realizes the gas circulation in contaminated soil, i.e. air is entered organic by snorkel
Contaminated soil heap body 4, the air for carrying pollutant enter supervisor 11 by exhaust column, then carry out gas by gas-liquid separator 12
Liquid separation enters exhaust gas cleaner 16 by aspiration pump 15 and purifies the air for carrying pollutant, purified air
It is discharged through exhaust pipe 17.Meanwhile the first water pump 7 is opened, the water in water tank 6 is pumped to water supply pipe 8, moisturizing by the first water pump 7
Water is added on organic polluted soil heap body 4 by pipe 8, and under the action of aspiration pump 15, water enters supervisor 11 by exhaust tube 10,
Then it is left in gas-liquid separator 12 after gas-liquid separator 12 carries out gas-liquid separation, accelerates water in organic polluted soil heap
Osmotic efficiency on body 4 improves microorganism to organic contamination to guarantee that humidity is not much different everywhere in organic polluted soil heap body
The decomposition efficiency of soil heap body 4.The soil sample of acquisition in every 10 days, it is random from 4 top of organic polluted soil heap body, side with earth boring auger
Each 3 sampled points of surface layer (0.5m) and deep layer (1.0m) soil sample are acquired, soil sample same depth are measured after mixing wherein native
The earth factor (ammonia nitrogen, nitrate nitrogen, available phosphorus content) and PAHs total residual concentration.It is collected simultaneously the tail gas and porous material of exhaust pipe 17
The percolate of the bed of material 3 detects wherein PAHs concentration, avoids secondary pollution.
A kind of biological renovation method of organic polluted soil, includes the following steps:
(i) pretreatment of organic polluted soil: carrying out sieving approach for bulky grain organic polluted soil, then to organic contamination soil
Be mixed into nutrients in earth, the weight ratio of organic polluted soil and nutrients is 1000:0.1, wherein nutrients include lactic acid 8Kg,
Urea 1.1Kg and potassium dihydrogen phosphate 1Kg；
(ii) heap of organic polluted soil heap body is built: pretreated organic polluted soil heap is built up organic polluted soil heap
Body, organic polluted soil heap external surface cover rain-proof cover；
(iii) the compost processing of organic polluted soil heap body: keep organic polluted soil heap intracorporal in compost treatment process
20 DEG C of temperature, air draught amount 1.0m3/ h, moisture content 5%.
Embodiment 2
Difference from Example 1 is that the biological renovation method for the organic polluted soil that the present embodiment uses is different.
A kind of biological renovation method of organic polluted soil, includes the following steps:
(i) nutrients, the weight of organic polluted soil and nutrients the pretreatment of organic polluted soil: are mixed into organic polluted soil
Amount is than being 1000:0.3, and wherein nutrients includes citric acid 9Kg, urea 1.0Kg and potassium dihydrogen phosphate 0.5Kg；
(ii) heap of organic polluted soil heap body is built: pretreated organic polluted soil heap is built up organic polluted soil heap
Body, organic polluted soil heap external surface cover rain-proof cover；
(iii) the compost processing of organic polluted soil heap body: keep organic polluted soil heap intracorporal in compost treatment process
22 DEG C of temperature, air draught amount 0.75m3/ h, moisture content 12%.
Embodiment 3
Difference from Example 1 is that the biological renovation method for the organic polluted soil that the present embodiment uses is different.
A kind of biological renovation method of organic polluted soil, includes the following steps:
(i) nutrients, the weight of organic polluted soil and nutrients the pretreatment of organic polluted soil: are mixed into organic polluted soil
Amount is than being 1000:0.5, and wherein nutrients includes 10 parts of fatty acid, urea 0.9Kg and potassium dihydrogen phosphate 2Kg；
(ii) heap of organic polluted soil heap body is built: pretreated organic polluted soil heap is built up organic polluted soil heap
Body, organic polluted soil heap external surface cover rain-proof cover；
(iii) the compost processing of organic polluted soil heap body: keep organic polluted soil heap intracorporal in compost treatment process
25 DEG C of temperature, air draught amount 0.5m3/ h, moisture content 20%.
Embodiment 4
Difference from Example 1 is that the pre-treatment step of organic polluted soil is different in the present embodiment.
The pretreatment of organic polluted soil: bulky grain organic polluted soil is subjected to sieving approach, then to organic contamination
It is mixed into nutrients in soil and is loaded with the charcoal of microorganism, organic polluted soil, nutrients and the charcoal for being loaded with microorganism
Weight ratio be 1000:0.1:6.
The preparation of nutrients: lactic acid 8Kg, urea 1.1Kg and potassium dihydrogen phosphate 1Kg are mixed up to nutrients.
It is loaded with the preparation of the charcoal of microorganism: cellulose 6Kg and deionized water 0.1Kg is warming up in confined conditions
500 DEG C, insulation reaction 10min are down to room temperature, filtering, dry to obtain charcoal；By charcoal 3Kg, Pseudomonas stutzeri freeze-dried powder
0.1Kg and enterobacter cloacae freeze-dried powder 0.5Kg be added to mixed liquor 7.5Kg (lactic acid: urea: potassium dihydrogen phosphate: water=30:4:
It mixes in 1:1000), static 20h, air-dries under the conditions of temperature is 10 DEG C to get the charcoal for being loaded with microorganism.
Embodiment 5
Difference from Example 2 is that the pre-treatment step of organic polluted soil is different in the present embodiment.
The pretreatment of organic polluted soil: bulky grain organic polluted soil is subjected to sieving approach, then to organic contamination
It is mixed into nutrients in soil and is loaded with the charcoal of microorganism, organic polluted soil, nutrients and the weight ratio for being loaded with microorganism
For 1000:0.3:10.
The preparation of nutrients: citric acid 9Kg, urea 1.0Kg and potassium dihydrogen phosphate 0.5Kg are mixed up to nutrients.
It is loaded with the preparation of the charcoal of microorganism: cellulose 6Kg and deionized water 0.15Kg is heated up in confined conditions
To 600 DEG C, insulation reaction 8min, it is down to room temperature, filtering, dries to obtain charcoal；Charcoal 5Kg, Pseudomonas stutzeri are lyophilized
Powder 0.5Kg and enterobacter cloacae freeze-dried powder 0.1Kg be added to mixed liquor 5.0Kg (citric acid: urea: potassium dihydrogen phosphate: water=
It mixes in 40:5:0.5:1000), static 25h, air-dries under the conditions of temperature is 5 DEG C to get the charcoal for being loaded with microorganism.
Embodiment 6
Difference from Example 3 is that the pre-treatment step of organic polluted soil is different in the present embodiment.
The pretreatment of organic polluted soil: bulky grain organic polluted soil is subjected to sieving approach, then to organic contamination
It is mixed into nutrients in soil and is loaded with the charcoal of microorganism, organic polluted soil, nutrients and the weight ratio for being loaded with microorganism
For 1000:0.5:2.
The preparation of nutrients: 10 parts of fatty acid, urea 0.9Kg and potassium dihydrogen phosphate 2Kg are mixed up to nutrients.
It is loaded with the preparation of the charcoal of microorganism: cellulose 6Kg and deionized water 0.2Kg is warming up in confined conditions
700 DEG C, insulation reaction 5min are down to room temperature, filtering, dry to obtain charcoal；By charcoal 4Kg, Pseudomonas stutzeri freeze-dried powder
0.3Kg and enterobacter cloacae freeze-dried powder 0.3Kg be added to mixed liquor 10Kg (fatty acid: urea: potassium dihydrogen phosphate: water=50:3:
It mixes in 0.75:1000), static 30h, air-dries under the conditions of temperature is 7 DEG C to get the charcoal for being loaded with microorganism.
Comparative example
The difference is that, organic polluted soil is without pretreatment in this comparative example with embodiment 1-6.
Organic polluted soil heap body in embodiment 1-6 was handled through 50 days composts, and is advised using HJ805-2016 standard
Fixed, the concentration of polycyclic aromatic hydrocarbon, measurement result are shown in Tables 1 and 2 in the organic polluted soil heap body of measurement compost front and back.By before and after compost
The concentration calculation degradation rate of polycyclic aromatic hydrocarbon, calculated result are shown in Table 3 in organic polluted soil heap body.
The initial concentration (mg/Kg) of polycyclic aromatic hydrocarbon in 1 organic polluted soil heap body of table
| Test item | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Comparative example |
| Naphthalene | 6.155 | 5.21 | 6.90 | 6.755 | 6.155 | 5.75 | 4.06 |
| Anthracene | 86.845 | 66.215 | 106.49 | 135.46 | 111.87 | 61.82 | 106.235 |
| Fluorenes | 94.67 | 62.165 | 98.82 | 54.36 | 92.25 | 64.11 | 89.89 |
| It is luxuriant and rich with fragrance | 100.04 | 82.14 | 81.715 | 80.39 | 85.32 | 90.25 | 80.55 |
| Pyrene | 80.59 | 36.94 | 54.635 | 73.00 | 58.09 | 43.665 | 73.635 |
| Fluoranthene | 180.61 | 142.32 | 137.46 | 228.03 | 174.31 | 140.455 | 136.4 |
| Benzo (a) pyrene | 1.855 | 1.99 | 1.95 | 1.74 | 1.82 | 2.28 | 1.85 |
| Benzo (b) fluoranthene | 0.295 | 0.24 | 0.255 | 0.41 | 0.31 | 0.32 | 0.195 |
| Benzo (k) fluoranthene | 0.545 | 0.735 | 0.805 | 0.60 | 0.80 | 0.94 | 0.765 |
Concentration (mg/Kg) after the reparation of polycyclic aromatic hydrocarbon in 2 organic polluted soil heap body of table
| Test item | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Comparative example |
| Naphthalene | 0.46 | 1.05 | 1.975 | 0.37 | 0.415 | 0.46 | 3.255 |
| Anthracene | 21.15 | 22.65 | 27.70 | 28.10 | 23.40 | 14.00 | 39.10 |
| Fluorenes | 38.40 | 14.60 | 36.55 | 5.62 | 3.70 | 7.35 | 42.40 |
| It is luxuriant and rich with fragrance | 38.4 | 32.2 | 36.55 | 22.1 | 27.20 | 27.4 | 60.46 |
| Pyrene | 31.30 | 16.795 | 21.35 | 25.80 | 14.00 | 8.19 | 52.78 |
| Fluoranthene | 31.7 | 32.72 | 23.53 | 11.7 | 25.8 | 16.55 | 62.10 |
| Benzo (a) pyrene | 0.455 | 0.46 | 0.47 | 0.38 | 0.4 | 0.52 | 0.47 |
| Benzo (b) fluoranthene | 1.01 | 0.97 | 1.23 | 0.83 | 1.13 | 1.21 | 0.90 |
| Benzo (k) fluoranthene | 0.95 | 0.94 | 1.195 | 1.12 | 1.1 | 1.18 | 0.845 |
The degradation rate of polycyclic aromatic hydrocarbon in 3 organic polluted soil heap body of table
| Test item | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Comparative example |
| Naphthalene | 92.53% | 79.85% | 71.38% | 94.52% | 93.26% | 92.00% | 19.83% |
| Anthracene | 75.65% | 65.79% | 73.99% | 79.23% | 79.08% | 77.35% | 63.19% |
| Fluorenes | 59.44% | 76.51% | 63.01% | 89.66% | 95.99% | 88.5% | 52.83% |
| It is luxuriant and rich with fragrance | 61.62% | 60.80% | 55.27% | 72.51% | 68.12% | 69.64% | 24.94% |
| Pyrene | 61.16% | 54.54% | 60.92% | 64.66% | 75.90% | 81.24% | 28.32% |
| Fluoranthene | 82.25% | 77.01% | 82.88% | 94.57% | 85.20% | 88.22% | 52.27% |
| Benzo (a) pyrene | 75.47% | 76.88% | 75.90% | 78.16% | 78.02% | 77.19% | 74.59% |
| Benzo (b) fluoranthene | - 242.37% | - 304.17% | - 382.35% | - 102.44% | 264.52% | - 278.13% | - 361.54% |
| Benzo (k) fluoranthene | - 74.31% | - 27.89% | - 48.45% | - 86.67% | - 37.5% | - 25.53% | - 10.46% |
It can be seen that the organic polluted soil heap body containing polycyclic aromatic hydrocarbon after compost 50 days in conjunction with table 1-3, in comparative example
Anthracene, fluorenes, phenanthrene, fluoranthene pollutant load are significantly higher than embodiment 1-6.
For comparative example, the intracorporal polycyclic aromatic hydrocarbon pollutant of organic polluted soil heap in embodiment 1-3 is significant
Decline, under the action of illustrating the indigenous microorganism in organic polluted soil, addition nutrients accelerates the drop of most of pollutant
Solution, wherein the degradation rate of benzo (a) pyrene is 70% or more.
For embodiment 1-3, the intracorporal polycyclic aromatic hydrocarbon pollutant of organic polluted soil heap in embodiment 4-6 is aobvious
Decline is write, the charcoal for being loaded with microorganism can strengthen reparation polycyclic aromatic hydrocarbon pollutant.Illustrate that original inhabitants are micro- in organic polluted soil
Under the synergistic effect of biology and the charcoal for being loaded with microorganism, the degradation of most pollutants is accelerated.
Claims (10)
1. a kind of biological renovation method of organic polluted soil, which comprises the steps of:
(i) nutrients, the weight of organic polluted soil and nutrients the pretreatment of organic polluted soil: are mixed into organic polluted soil
Amount is than being 1000:0.1-0.5；
(ii) heap of organic polluted soil heap body is built: pretreated organic polluted soil heap is built up organic polluted soil heap
Body, organic polluted soil heap external surface cover rain-proof cover；
(iii) the compost processing of organic polluted soil heap body: keep organic polluted soil heap intracorporal in compost treatment process
20-25 DEG C of temperature, air draught amount 0.5-1.0m3/ h, moisture content 5-20%.
2. a kind of biological renovation method of organic polluted soil according to claim 1, which is characterized in that the nutrients
Including 80-100 parts of organic acid carbon source based on parts by weight, 9-11 parts of urea and 0.5-2 parts of potassium dihydrogen phosphate.
3. a kind of biological renovation method of organic polluted soil according to claim 2, which is characterized in that the organic acid
Class carbon source is selected from least one of lactic acid, citric acid, fatty acid.
4. a kind of biological renovation method of organic polluted soil according to claim 1, which is characterized in that step (i) has
The pretreatment of machine contaminated soil further includes that the charcoal for being loaded with microorganism is mixed into organic polluted soil, organic polluted soil and load
The weight ratio for having the charcoal of microorganism is 1000:2-10.
5. a kind of biological renovation method of organic polluted soil according to claim 4, which is characterized in that be loaded with microorganism
Charcoal using following methods prepare:
Cellulose and deionized water are warming up to 500-700 DEG C, insulation reaction 5-10min in confined conditions, cool down, filter,
Charcoal is dried to obtain, wherein the weight ratio of cellulose and deionized water is 300:5-10；
By charcoal, Pseudomonas stutzeri freeze-dried powder and enterobacter cloacae freeze-dried powder be added to by organic acid carbon source, urea and
It mixes in mixed liquor made from potassium dihydrogen phosphate and water, static 20-30h, air-dries under the conditions of temperature is 5-10 DEG C to get being loaded with
The charcoal of microorganism；The wherein weight ratio of charcoal, Pseudomonas stutzeri freeze-dried powder, enterobacter cloacae freeze-dried powder and mixed liquor
For 30-50:1-5:1-5:50-100；The mixed liquor includes organic acid carbon source 30-50 parts by weight, urea 3-5 parts by weight, phosphorus
1000 parts by weight of acid dihydride potassium 0.5-1 parts by weight and water.
6. a kind of biological renovation method suitable for organic polluted soil described in any one of claim 1 to 5 is organic
The biological prosthetic device of contaminated soil, which is characterized in that stack ground including soil, the soil is stacked ground and spread from the bottom to top
Equipped with porous material layer and organic polluted soil heap body；
Exhaust tube is preset in the porous material layer, the porous material layer, the pumping are extended in one end of the exhaust tube
Tracheae offers several aspirating holes in the one end being located in the porous material layer, and the exhaust tube extends the porous material
One end outside layer is communicated with supervisor, and the supervisor is communicated with gas-liquid separator, aspiration pump, tail gas clean-up by the way that pipeline is in sequential series
Device, exhaust pipe；Ventilation duct is provided in the organic polluted soil heap body, one end of the ventilation duct is located at organic contamination soil
It is external that earth heap body is interior, the other end is located at organic polluted soil heap；
The outer surface of the organic polluted soil heap body is equipped with water supply pipe in advance, and the water supply pipe passes through pipeline connection in sequential series
There are the first water pump, water tank；
The outer surface of the organic polluted soil heap body is covered with rain-proof cover, and the ventilation duct runs through the rain-proof cover.
7. a kind of biological prosthetic device of organic polluted soil according to claim 6, which is characterized in that the exhaust tube
It is more, the exhaust tube is along the setting of the radial level direction of supervisor, and the axial direction of the more exhaust tubes edge supervisors is sequentially
It arranges and the more exhaust tubes is located at the ipsilateral of the supervisor.
8. a kind of biological prosthetic device of organic polluted soil according to claim 6, which is characterized in that organic dirt
The periphery of dye soil heap body is provided with leachate collection system.
9. a kind of biological prosthetic device of organic polluted soil according to claim 8, which is characterized in that the percolate
Collection system includes block water platform and rhone, platform and rhone composition the closing positioned at organic polluted soil heap body periphery that block water
It is combined diameter, the rhone is communicated with collecting-tank.
10. a kind of biological prosthetic device of organic polluted soil according to claim 6, which is characterized in that described porous
Material layer and soil stack ground and are also covered with impervious barrier in advance.
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