CN105945060A - Biological fermentation soil restoration method for removing heavy metal lead - Google Patents
Biological fermentation soil restoration method for removing heavy metal lead Download PDFInfo
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- CN105945060A CN105945060A CN201610384949.5A CN201610384949A CN105945060A CN 105945060 A CN105945060 A CN 105945060A CN 201610384949 A CN201610384949 A CN 201610384949A CN 105945060 A CN105945060 A CN 105945060A
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- soil
- biofermentation
- heavy metal
- lead
- storehouse
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
Abstract
The invention discloses a biological fermentation soil restoration method for removing heavy metal lead. According to the method, the biological fermentation characteristics of oxidation staphylococcus bacillus are creatively utilized; under the participation of D-sorbitol and various inherent nutrient contents in the soil, a lactonization reaction takes inside the oxidation staphylococcus bacillus; finally, L-ascorbic acid (vitamin C) is produced through fermentation; then, the L-ascorbic acid can be combined with the heavy metal lead to produce non-toxic inorganic salts with the density being obviously greater than that of soil particles; and the inorganic salts can be separated and removed from the soil through vibration sorting operation. Meanwhile, the cost of the L-ascorbic acid produced by the D-sorbitol participating in the biological fermentation reaction is much lower than the cost of directly adding the L-ascorbic acid into the soil; and the material cost of the soil restoration treatment can be greatly reduced.
Description
Technical field
The present invention relates to a kind of biofermentation soil remediation method removing heavy metal lead, belong to the soil remediation field in environmental conservation.
Background technology
Along with the protection of growth and the quickening of process of industrialization of population in the world, soil and environment and the sustainable development of agricultural are to become the important topic of world today's facing mankind.Heavy metal is main soil inorganic pollutant, and the pollution of heavy metal is irreversible.In past more than 20 year, the pollution of ecological environment of soil is conducted extensive research by the heavy metal that people the most just introduce through different approaches.
Lead is one of common heavy metal element of nature, is also one of important polluted heavy metals element simultaneously.Lead is the non-essential element of the mankind, animal, plant, lead in soil is divided into natural source and artificial source, the former is essentially from the background values in mineral and rock, and the latter is mainly derived from atmospheric falling dust, mud, the Land_use change of municipal refuse and mining and metal-processing industry etc..Soil is the main media of plant absorption lead, and after soil suffers lead contamination, plant is possible to absorb the tired absorption of more lead, even ultraproduct；Directly use urban industry waste water to carry out field irrigation also can substantial amounts of. g., lead tape be entered in soil；Lead ore exploitation, smelting and some utilizations of pesticides all can cause lead accumulation in soil.
Existing lead-contaminated soil is administered recovery technique and is mainly included stable curing method, physical method and three kinds of methods of biological restoration.
(1) stable curing method: this method is by adding heavy metal stabilization agent targetedly in soil, utilize the absorption of stabilization agent heavy metal, oxidoreduction, antagonism or precipitation, reduce the biological effectiveness of heavy metal, make heavy metal particles mineralising, lose and the condition of extraneous reaction, thus reduce the concentration of heavy metal-polluted soil.This method carries out in-situ immobilization to soil, has saved trucking expenses and storage location expense, and environmental pollution is little, is the effective ways eliminating heavy metal pollution of soil at present.But, the method need to add a large amount of chemical agent in soil, can produce the highest supplies consumption cost, meanwhile, also introduce a large amount of chemical substance in soil, ecological environment of soil can cause irreversible impact.
(2) physical method: physical method is the feature that the migration velocity utilizing heavy metal lead in soil is slow, a kind of recovery technique that the soil containing heavy metal lead is transferred out, mainly include that soil replacement method and soil moved in improve the original are digged method.Although physical method has the advantages such as technology path is simple, the suitability is extensive, but its implementation cost is the highest, and, the soil through displacing, its lead contamination still exists, in addition it is also necessary to expend more human and material resources and financial resources and it is carried out harmless treatment.
(3) biological method: main with phytoremediation as representative.Phytoremediation is the mechanism of action utilizing plant and the absorption of root system circle microorganism system thereof, volatilizing, convert and degrade, remove an emerging pollutant abatement technology of polluter in environment, it is low with expense, not the advantage such as damage field ground structure, environment purification become the hot technology of remediating lead-contaminated soil.Specifically, utilize plant distinctive pollutant conversion characteristic itself, by oxidation, reduction or hydrolysis, pollutant are made to be degraded and the ability of detoxification, utilize the ecological condition that root system of plant circle is special, accelerate the growth of soil microorganism, significantly improve Biomass and the potential of microorganism in root system circle microenvironment, thus improve the ability of the decomposition to organic contaminants in soil.But, the floristics being available for utilizing is little, so having resulted in the limitation administered.
At present, generally there is the deficiencies such as cost is high, efficiency is low, ecology influence is serious, technical limitation is big in existing heavy metal-polluted soil control of Pb pollution technology.Therefore, it is necessary to break away from existing technical thought, hew out improvement heavy metal in soil lead contamination, it is achieved the new way of soil remediation, and then develop the soil restoring technology removing heavy metal in soil lead of a kind of new type.
Summary of the invention
nullFor solving the deficiencies in the prior art，The invention provides a kind of biofermentation soil remediation method removing heavy metal lead，Fine grained soil after grinding process，Inside reactor is entered by the soil charging aperture of biofermentation-lead salt reactor upper left quarter，And in conveyer belt is fed directly to biofermentation storehouse，It is now placed in two atomizers above biofermentation storehouse to start，Start the pending soil injection in biofermentation storehouse containing oxidation Fructus Vitis viniferae bacillus strain and the mixed solution of D-glucitol，The stirrer paddle being simultaneously positioned at centre position, biofermentation storehouse also begins to rotate，Soil in biofermentation storehouse is stirred，After the mixed solution making oxidation Fructus Vitis viniferae bacillus strain and D-glucitol is sufficiently mixed with soil，Biofermentation process starts therewith，It is positioned at 4 electric heater units bottom biofermentation storehouse in stopping fermentation time and the soil moisture in whole fermentation cabin is heated to about 30 ~ 35 DEG C，Generate nontoxic and density and be noticeably greater than the inorganic salts of soil particle，Soil after fermented process is discharged from biofermentation storehouse lower exit port under biofermentation Cang Xiafangchukouchu rotates the rotation conveying effect of conveying blade with inorganic lead salt mixture，And rely on action of gravity to fall to vibrate at sorting bed to carry out vibration sorting，Soil after purified treatment is separated with the inorganic lead salt generated，Wherein，Soil after purified treatment is discharged through soil discharging opening，And enter next soil treatment operation，And the inorganic lead salt obtained through vibration sorting is discharged through waste residue row's mouth，Refining again of the laggard quadrat of centralized recovery.
Further, the internal capacity of biofermentation-lead salt reactor is 320m3, wherein, the dischargeable capacity in biofermentation storehouse is 125m3, it is 180min that soil averagely stops fermentation time.
Further, the running voltage of the stirrer paddle of biofermentation-lead salt reactor is 380V, and Stirring speed is 5 turns/min, and the running voltage of its atomizer is 15V, it is possible to producing diameter and be about the atomized drop of 15 μm, working pressure range is 15 ~ 50kg.
Further, the running voltage of the electric heater unit of biofermentation-lead salt reactor is 380V, and heating temperature range is 28 ~ 40 DEG C.
Further, the running voltage of the vibration sorting bed of biofermentation-lead salt reactor is 380V, and vibration bevel angle is accurately fixed as 17.2 °, and frequency of vibration is 35.5Hz.
It is an advantage of the current invention that:
(1) this method has been broken away from existing heavy metal lead pollution soil remediation and has been processed technique, the creative oxidation Fructus Vitis viniferae bacillus that make use of can produce the most ascorbic characteristic of L-AA by biological fermentation process, also use L-AA to be combined with heavy metal lead simultaneously, and generation is insoluble in water and the reaction of nontoxic salt, and from soil, separated removal eventually through vibration sorting operation, the method is the strongest to the selectivity of heavy metal in soil lead, being processing method the most targetedly, its treatment effeciency is up to 99.8%.
(2) this method is used oxidation Fructus Vitis viniferae bacillus and the L-AA of D-glucitol and biological fermentation process institute output are all to human body and environmentally friendly, and the leaded inorganic salts that generates of reaction all recycles through reclaiming to refine, and will not be emitted in environment.Therefore, this method is a kind of non-harmful purifying treatment method.
(3) this method is while using oxidation Fructus Vitis viniferae bacillus and D-glucitol both to process material, make use of all kinds of nutritional labelings intrinsic in soil the most to greatest extent, saves process Material Cost to greatest extent, has higher economic benefit.
(4) this method principle is simple, and design and construction cost is relatively low, and treatment effect is preferable, and operation expense is the lowest, is conducive to popularization and application on a large scale.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of biofermentation-lead salt reactor.
61-soil charging aperture, 62-biofermentation storehouse, 63-stirrer paddle, 64-atomizer, 65-electric heater unit, 66-rotate conveying blade, 67-vibration sorting bed, 68-soil discharging opening, 69-waste residue row's mouth.
Detailed description of the invention
As it is shown in figure 1, a kind of biofermentation soil remediation method removing heavy metal lead, this restorative procedure is carried out by biofermentation-lead salt reactor 6.Biofermentation-lead salt reactor 6 material uses manganese alloy steel, and internal capacity is 320m3, reactor upper left quarter is provided with soil charging aperture 61, and lower left quarter is provided with soil discharging opening 68, and right lower quadrant is provided with waste residue row's mouth 69, is provided with biofermentation storehouse 62 in the middle part of reactor, and dischargeable capacity is 125m3And be connected with soil charging aperture 61 by conveyer belt, reactor head is provided with a stirrer paddle 63 and two atomizers 64 by fixed support, stirrer paddle 63 stretches in the middle part of biofermentation storehouse 62, and atomizer 64 is positioned at above biofermentation storehouse, 4 electric heater units 65 have been mounted side by side bottom biofermentation storehouse 62, it is provided with one at the lower exit port of biofermentation storehouse 62 and rotates conveying blade 66, reactor bottom is provided with a set of vibration sorting bed 67, and its arranged on left and right sides is connected to soil discharging opening 68 and waste residue row's mouth 69 by conveyer belt respectively.nullFine grained soil after grinding process，Inside reactor is entered by the soil charging aperture 61 of biofermentation-lead salt reactor 6 upper left quarter，And in conveyer belt is fed directly to biofermentation storehouse 62，Now，It is positioned at above biofermentation storehouse 62 two atomizers 64 to start，Start the pending soil injection in biofermentation storehouse 62 containing oxidation Fructus Vitis viniferae bacillus strain and the mixed solution of D-glucitol，Simultaneously，The stirrer paddle 63 being positioned at centre position, biofermentation storehouse 62 also begins to rotate，The soil of 62 in biofermentation storehouse can be stirred，After the mixed solution making oxidation Fructus Vitis viniferae bacillus strain and D-glucitol is sufficiently mixed with soil，Biofermentation process starts therewith，In the stop fermentation time of 180min，It is positioned at bottom biofermentation storehouse 62 4 electric heater units 65 and the soil moisture in whole fermentation cabin is heated to (30 ~ 35 DEG C) of the growth of appropriate oxidation Fructus Vitis viniferae bacillus，Under the participation of all kinds of nutritional labelings intrinsic in D-glucitol and soil，Oxidation Fructus Vitis viniferae bacillus is internal there is lactonization reaction，Final fermentation output L-AA (vitamin C)，L-AA immediately with the heavy metal lead generation association reaction in soil，Generate nontoxic and density and be noticeably greater than the inorganic salts of soil particle，Soil after fermented process and inorganic lead salt mixture，Rotate at the lower exit port of biofermentation storehouse 62 under the rotation conveying effect of conveying blade 66，Appropriate soil and inorganic lead salt mixture can be discharged from biofermentation storehouse 62 lower exit port，And rely on action of gravity to fall to vibrate at sorting bed 67，Vibration sorting bed 67 carries out vibration sorting with the angle of inclination of 17.2 ° and the frequency of vibration of 35.5Hz，Soil after purified treatment can be separated with the inorganic lead salt generated，Wherein，Soil after purified treatment is discharged through soil discharging opening 68，And enter next soil treatment operation，And the inorganic lead salt obtained through vibration sorting is discharged through waste residue row's mouth 69，Through refining again of the laggard quadrat of centralized recovery.
Soil after being processed by this method, the removal efficiency of its heavy metal lead is up to 99.8%.
Biofermentation-lead salt reactor 6, the running voltage of stirrer paddle 63 is 380V, and Stirring speed is 5 turns/min, and the running voltage of atomizer 64 is 15V, it is possible to producing diameter and be about the atomized drop of 15 μm, working pressure range is 15 ~ 50kg.The running voltage of electric heater unit 65 is 380V, and heating temperature range is 28 ~ 40 DEG C.The running voltage of vibration sorting bed 67 is 380V, and vibration bevel angle is accurately fixed as 17.2 °, and frequency of vibration is 35.5Hz.
Claims (5)
- null1. the biofermentation soil remediation method removing heavy metal lead，It is characterized in that，Fine grained soil after grinding process，Inside reactor is entered by the soil charging aperture of biofermentation-lead salt reactor upper left quarter，And in conveyer belt is fed directly to biofermentation storehouse，It is now placed in two atomizers above biofermentation storehouse to start，Start the pending soil injection in biofermentation storehouse containing oxidation Fructus Vitis viniferae bacillus strain and the mixed solution of D-glucitol，The stirrer paddle being simultaneously positioned at centre position, biofermentation storehouse also begins to rotate，Soil in biofermentation storehouse is stirred，After the mixed solution making oxidation Fructus Vitis viniferae bacillus strain and D-glucitol is sufficiently mixed with soil，Biofermentation process starts therewith，It is positioned at 4 electric heater units bottom biofermentation storehouse in stopping fermentation time and the soil moisture in whole fermentation cabin is heated to about 30 ~ 35 DEG C，Generate nontoxic and density and be noticeably greater than the inorganic salts of soil particle，Soil after fermented process is discharged from biofermentation storehouse lower exit port under biofermentation Cang Xiafangchukouchu rotates the rotation conveying effect of conveying blade with inorganic lead salt mixture，And rely on action of gravity to fall to vibrate at sorting bed to carry out vibration sorting，Soil after purified treatment is separated with the inorganic lead salt generated，Wherein，Soil after purified treatment is discharged through soil discharging opening，And enter next soil treatment operation，And the inorganic lead salt obtained through vibration sorting is discharged through waste residue row's mouth，Refining again of the laggard quadrat of centralized recovery.
- The biofermentation soil remediation method of removal heavy metal lead the most according to claim 1, it is characterised in that the internal capacity of biofermentation-lead salt reactor is 320m3, the dischargeable capacity in biofermentation storehouse therein is 125m3, it is 180min that soil averagely stops fermentation time.
- The biofermentation soil remediation method of removal heavy metal lead the most according to claim 1, it is characterized in that, the running voltage of the stirrer paddle of biofermentation-lead salt reactor is 380V, Stirring speed is 5 turns/min, the running voltage of its atomizer is 15V, it is possible to produces diameter and is about the atomized drop of 15 μm.
- The biofermentation soil remediation method of removal heavy metal lead the most according to claim 1, it is characterised in that the running voltage of the electric heater unit of biofermentation-lead salt reactor is 380V, heating temperature range is about 28 ~ 40 DEG C.
- The biofermentation soil remediation method of removal heavy metal lead the most according to claim 1, it is characterized in that, the running voltage of the vibration sorting bed of biofermentation-lead salt reactor is 380V, and vibration bevel angle is accurately fixed as 17.2 °, and frequency of vibration is 35.5Hz.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811229900.8A CN109226250A (en) | 2016-06-02 | 2016-06-02 | A kind of biofermentation soil remediation method removing heavy metal lead |
| CN201610384949.5A CN105945060B (en) | 2016-06-02 | 2016-06-02 | A kind of biofermentation soil remediation method removing heavy metal lead |
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| CN201610384949.5A CN105945060B (en) | 2016-06-02 | 2016-06-02 | A kind of biofermentation soil remediation method removing heavy metal lead |
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| CN201811229900.8A Division CN109226250A (en) | 2016-06-02 | 2016-06-02 | A kind of biofermentation soil remediation method removing heavy metal lead |
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| CN105945060A true CN105945060A (en) | 2016-09-21 |
| CN105945060B CN105945060B (en) | 2019-01-01 |
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| CN201610384949.5A Expired - Fee Related CN105945060B (en) | 2016-06-02 | 2016-06-02 | A kind of biofermentation soil remediation method removing heavy metal lead |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108080407A (en) * | 2018-02-01 | 2018-05-29 | 上海盛弘环境科技有限公司 | A kind of moveable-type soil pollution is the same as position restorative procedure |
| CN108580541A (en) * | 2018-04-26 | 2018-09-28 | 爱土工程环境科技有限公司 | A kind of farmland pollution soil in-situ soil moved in improve the original prosthetic appliance and method |
| CN109365510A (en) * | 2018-11-09 | 2019-02-22 | 天津天绿健科技有限公司 | A kind of soil restoring device |
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2016
- 2016-06-02 CN CN201811229900.8A patent/CN109226250A/en not_active Withdrawn
- 2016-06-02 CN CN201610384949.5A patent/CN105945060B/en not_active Expired - Fee Related
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| DE4209180A1 (en) * | 1992-03-20 | 1993-09-23 | Schwarze Alois Arnold | Heavy metal recovery - by adding organic degrading reduction agent to contaminated watery waste, for redn. into free metal for physical sepn. |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108080407A (en) * | 2018-02-01 | 2018-05-29 | 上海盛弘环境科技有限公司 | A kind of moveable-type soil pollution is the same as position restorative procedure |
| CN108580541A (en) * | 2018-04-26 | 2018-09-28 | 爱土工程环境科技有限公司 | A kind of farmland pollution soil in-situ soil moved in improve the original prosthetic appliance and method |
| CN108580541B (en) * | 2018-04-26 | 2023-09-01 | 爱土工程环境科技有限公司 | In-situ foreign soil restoration equipment and method for farmland contaminated soil |
| CN109365510A (en) * | 2018-11-09 | 2019-02-22 | 天津天绿健科技有限公司 | A kind of soil restoring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105945060B (en) | 2019-01-01 |
| CN109226250A (en) | 2019-01-18 |
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