CN109226250A - A kind of biofermentation soil remediation method removing heavy metal lead - Google Patents

A kind of biofermentation soil remediation method removing heavy metal lead Download PDF

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Publication number
CN109226250A
CN109226250A CN201811229900.8A CN201811229900A CN109226250A CN 109226250 A CN109226250 A CN 109226250A CN 201811229900 A CN201811229900 A CN 201811229900A CN 109226250 A CN109226250 A CN 109226250A
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China
Prior art keywords
soil
biofermentation
heavy metal
lead
lead salt
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CN201811229900.8A
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Chinese (zh)
Inventor
朱辉
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朱辉
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Priority to CN201811229900.8A priority Critical patent/CN109226250A/en
Priority to CN201610384949.5A priority patent/CN105945060B/en
Publication of CN109226250A publication Critical patent/CN109226250A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/08Reclamation of contaminated soil chemically
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/10Reclamation of contaminated soil microbiologically, biologically or by using enzymes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/10Reclamation of contaminated soil microbiologically, biologically or by using enzymes
    • B09C1/105Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants

Abstract

The invention discloses a kind of biofermentation soil remediation methods for removing heavy metal lead.The creative biofermentation characteristic that oxidation grape bacillus is utilized of this method, in D-glucitol and soil under the participation of intrinsic all kinds of nutritional ingredients, it aoxidizes and lactonization reaction occurs inside grape bacillus, final fermentation output L-AA (vitamin C), recycle L-AA can be in conjunction with heavy metal lead, the inorganic salts that nontoxic and density is noticeably greater than soil particle are generated, and removal is separated from soil by vibration sorting operation.Meanwhile the L-AA of biofermentation reaction institute's output is participated in using D-glucitol, cost can substantially reduce the Material Cost of soil remediation processing well below L-AA is directly added into soil.

Description

A kind of biofermentation soil remediation method removing heavy metal lead
Technical field
The present invention relates to a kind of biofermentation soil remediation methods for removing heavy metal lead, belong to the soil in environmental protection Reparation field.
Background technique
With the growth of population in the world and the quickening of process of industrialization, the protection of soil and environment and agricultural it is sustainable Development is with the important topic as world today's facing mankind.Heavy metal is main soil inorganic pollutant, the dirt of heavy metal Dye is irreversible.In more than 20 years of past, the heavy metal that people have just introduced by different approaches is to soil ecology ring The pollution in border conducts extensive research.
One of lead is common one of the heavy metal element of nature, while being also important polluted heavy metals element.Lead is The mankind, animal, plant non-essential element, the lead in soil is divided into natural source and artificial source, the former is mainly from mineral With the background values in rock, the latter is mainly derived from atmospheric falling dust, sludge, the land use of municipal refuse and mining and metal Processing industry etc..Soil is the main media of plant absorption lead, and after soil is by lead contamination, plant is possible to absorb more Lead or even the tired absorption of ultraproduct;Directly carrying out field irrigation using urban industry waste water can also enter a large amount of. g., lead tape in soil;Lead Mine exploitation, smelting and the use of some insecticides can all lead to the accumulation of lead in the soil.
It mainly includes stable curing method, physical method and biological restoration three that existing lead-contaminated soil, which administers recovery technique, Kind method.
(1) stable curing method: this method utilizes stabilization agent pair by targetedly adding heavy metal stabilization agent into soil Absorption, redox, antagonism or the precipitation of heavy metal, reduce the biological effectiveness of heavy metal, make heavy metal particles mineralising, The condition reacted with the external world is lost, to reduce the concentration of heavy metal-polluted soil.This method carries out in-situ immobilization to soil, has saved and has removed Freight charges are used and storage location expense, and environmental pollution is small, are the current effective ways for eliminating heavy metal pollution of soil.But the party Method need to add a large amount of chemical agents into soil, can generate very high supplies consumption cost, meanwhile, it is also introduced into soil big Chemical substance is measured, irreversible influence can be caused on ecological environment of soil.
(2) physical method: physical method is the feature slow using the migration velocity of heavy metal lead in the soil, will be contained There is a kind of recovery technique that the soil of heavy metal lead is transferred out, mainly includes that soil replacement method and soil moved in improve the original are digged method.Though physical method So have many advantages, such as that technology path is simple, applicability is extensive, but its implementation cost is very high, moreover, the soil through displacing, Lead contamination still exists, it is also necessary to expend more human and material resources and financial resources to carry out harmless treatment to it.
(3) biological method: mainly using phytoremediation as representative.Phytoremediation is to utilize plant and its micro- life of root system circle The mechanism of action of absorption, volatilization, conversion and the degradation of objects system is controlled to remove an emerging pollution of polluter in environment Reason technology, it is low with expense, does not destroy hot technology of the advantages that treatment of the earth, environment purification as remediating lead-contaminated soil. Specifically, obtain pollutant by oxidation, reduction or hydrolysis using the distinctive pollutant conversion characteristic of plant itself Accelerate the growth of edaphon using the special ecological condition of root system of plant circle with the ability degraded with detoxification, significantly improve The biomass and potential of microorganism in root system circle microenvironment, to improve the energy of the decomposition to organic contaminants in soil Power.But it is seldom for the floristics utilized, so having resulted in the limitation administered.
Currently, the generally existing at high cost, low efficiency of existing heavy metal-polluted soil control of Pb pollution technology, ecology influence are tight Again, the deficiencies of technical limitation is big.Therefore, it is necessary to get rid of existing technical thought, hews out and administer heavy metal in soil lead Pollution, realizes the new way of soil remediation, and then develops a kind of soil remediation of the removal heavy metal in soil lead of new type Technology.
Summary of the invention
To solve the deficiencies in the prior art, the present invention provides a kind of biofermentation soil for removing heavy metal lead Restorative procedure passes through biofermentation-lead salt reactor upper left quarter soil by the fine grained soil that grinds that treated Feed inlet enters inside reactor, and is fed directly in biofermentation storehouse through conveyer belt, is now placed in above biofermentation storehouse The starting of two atomizers, start the soil to be processed injection into biofermentation storehouse containing oxidation grape bacillus strain and D- The mixed solution of sorbierite, while the stirrer paddle for being located at biofermentation storehouse middle position also starts to rotate, by biofermentation storehouse Interior soil stirs evenly, after being sufficiently mixed the mixed solution for aoxidizing grape bacillus strain and D-glucitol and soil, biology Course of fermentation starts therewith, stops interior 4 electric heater units positioned at biofermentation orlop portion of fermentation time for entire fermentation cabin In the soil moisture be heated to about 30 ~ 35 DEG C, generate the inorganic salts that nontoxic and density is noticeably greater than soil particle, fermented place Soil and inorganic lead salt mixture after reason rotate under the rotation conveying effect of conveying blade in biofermentation Cang Xiafangchukouchu It is discharged from biofermentation storehouse lower exit port, and is fallen at vibration sorting bed by gravity and carry out vibration sorting, will passed through Soil after purified treatment is separated with generated inorganic lead salt, wherein the soil after purified treatment goes out through soil Material mouth discharge, and enter next soil treatment process, and pass through vibration and sort obtained inorganic lead salt through waste residue row's mouth discharge, collection It is middle to recycle refining again for laggard quadrat.
Further, biofermentation-lead salt reactor internal capacity is 320m3, wherein effective appearance in biofermentation storehouse Product is 125m3, it is 180min that soil, which averagely stops fermentation time,.
Further, the operating voltage of biofermentation-lead salt reactor stirrer paddle is 380V, and Stirring speed is 5 turns/min, the operating voltage of atomizer is 15V, can generate the atomized drop that diameter is about 15 μm, working pressure range For 15 ~ 50kg.
Further, the operating voltage of biofermentation-lead salt reactor electric heater unit is 380V, heating temperature range It is 28 ~ 40 DEG C.
Further, the operating voltage of biofermentation-lead salt reactor vibration sorting bed is 380V, vibrates bevel angle 17.2 ° accurately are fixed as, vibration frequency 35.5Hz.
The present invention has the advantages that
(1) this method gets rid of existing heavy metal lead pollution soil remediation treatment process, and creative is utilized oxidation grape Bacillus can generate L-AA, that is, ascorbic characteristic by biological fermentation process, while also use L-AA Can be in conjunction with heavy metal lead, and generate and be insoluble in water and the reaction of nontoxic salt, and eventually by vibration sorting operation from Removal is separated in soil, this method is very strong to the selectivity of heavy metal in soil lead, is the unusual targeted side of processing Method, treatment effeciency is up to 99.8%.
(2) oxidation grape bacillus and D-glucitol and the L- of biological fermentation process institute output used in this method are anti- Bad hematic acid reacts the leaded inorganic salts generated all by recycling refinement recycling to human body and environmentally friendly, will not It is emitted into environment.Therefore, this method is a kind of non-harmful purifying treatment method.
(3) this method is while using oxidation grape bacillus and both processing materials of D-glucitol, also to greatest extent Intrinsic all kinds of nutritional ingredients are utilized in soil, save processing Material Cost, economy with higher to greatest extent Benefit.
(4) this method principle is simple and easy, and cost is relatively low for design and construction, and treatment effect is preferable, operation expense It is very low, be conducive to promote and apply on a large scale.
Detailed description of the invention
Fig. 1 is biofermentation-lead salt reactor schematic diagram.
61- soil feed inlet, 62- biofermentation storehouse, 63- stirrer paddle, 64- atomizer, 65- electric heater unit, 66- Rotation conveying blade, 67- vibration sorting bed, 68- soil discharge port, 69- waste residue arrange mouth.
Specific embodiment
As shown in Figure 1, a kind of biofermentation soil remediation method for removing heavy metal lead, which passes through biology hair Ferment-lead salt reactor 6 carries out.Biofermentation -6 material of lead salt reactor uses manganese alloy steel, internal capacity 320m3, Reactor upper left quarter is equipped with soil feed inlet 61, and lower left quarter is equipped with soil discharge port 68, and right lower quadrant is equipped with waste residue and arranges mouth 69, reaction Biofermentation storehouse 62, dischargeable capacity 125m are installed in the middle part of device3, and be connected by conveyer belt with soil feed inlet 61, instead It answers and a stirrer paddle 63 and two atomizers 64 is equipped with by fixed bracket at the top of device, stirrer paddle 63 protrudes into biological hair 62 middle part of ferment storehouse, and atomizer 64 is located above biofermentation storehouse, 4 electric heating have been mounted side by side in 62 bottom of biofermentation storehouse Device 65, a rotation conveying blade 66 is equipped at 62 lower exit port of biofermentation storehouse, and reactor bottom is equipped with a set of vibration Sorting bed 67, arranged on left and right sides pass through conveyer belt respectively and are connected to soil discharge port 68 and waste residue row's mouth 69.By grinding Treated fine grained soil is entered in reactor by biofermentation -6 upper left quarter of lead salt reactor soil feed inlet 61 Portion, and be fed directly in biofermentation storehouse 62 through conveyer belt, at this point, being located at two atomizers of 62 top of biofermentation storehouse 64 startings start soil to be processed injection into biofermentation storehouse 62 containing the mixed of oxidation grape bacillus strain and D-glucitol Solution is closed, meanwhile, the stirrer paddle 63 positioned at 62 middle position of biofermentation storehouse also starts to rotate, can be by biofermentation storehouse 62 Soil stir evenly, after being sufficiently mixed the mixed solution for aoxidizing grape bacillus strain and D-glucitol and soil, biology hair Ferment process starts therewith, 4 electric heater units 65 in the stop fermentation time of 180min, positioned at 62 bottom of biofermentation storehouse The soil moisture in entire fermentation cabin is heated to (30 ~ 35 DEG C) of the growth of appropriate oxidation grape bacillus, in D-glucitol and soil In earth under the participation of intrinsic all kinds of nutritional ingredients, lactonization reaction, the final output L- that ferments occur inside oxidation grape bacillus With the heavy metal lead in soil association reaction occurs for ascorbic acid (vitamin C), L-AA immediately, generates nontoxic and density The noticeably greater than inorganic salts of soil particle, fermented treated soil and inorganic lead salt mixture, in biofermentation storehouse 62 At lower exit port under the rotation conveying effect of rotation conveying blade 66, suitable soil and inorganic lead salt mixture can be sent out from biology The discharge of ferment storehouse 62 lower exit port, and fallen at vibration sorting bed 67 by gravity, it vibrates sorting bed 67 and is inclined with 17.2 ° The vibration frequency of rake angle and 35.5Hz carry out vibration sorting, can be by the soil and generated inorganic lead after purified treatment Salt separates, wherein the soil after purified treatment is discharged through soil discharge port 68, and enters next soil treatment work Sequence, and pass through the inorganic lead salt that vibration sorting obtains and be discharged through waste residue row's mouth 69, through refining again for the laggard quadrat of centralized recovery.
By this method treated soil, the removal efficiency of heavy metal lead is up to 99.8%.
Biofermentation-lead salt reactor 6, the operating voltage of stirrer paddle 63 are 380V, Stirring speed is 5 turns/ The operating voltage of min, atomizer 64 are 15V, can generate the atomized drop that diameter is about 15 μm, working pressure range 15 ~50kg.The operating voltage of electric heater unit 65 is 380V, and heating temperature range is 28 ~ 40 DEG C.Vibrate the work electricity of sorting bed 67 Pressure is 380V, and vibration bevel angle is accurately fixed as 17.2 °, vibration frequency 35.5Hz.

Claims (3)

1. a kind of biofermentation soil remediation method for removing heavy metal lead, which is characterized in that by grinding, treated Fine grained soil enters inside reactor by biofermentation-lead salt reactor upper left quarter soil feed inlet, and through conveying Band is fed directly in biofermentation storehouse, and the two atomizers starting being now placed in above biofermentation storehouse starts to biology Soil to be processed in fermentation cabin sprays the mixed solution containing bacillus of oxidizing glucose bacterial strain and D-glucitol, while being located at life The stirrer paddle in object fermentation cabin middle position also starts to rotate, and the soil in biofermentation storehouse is stirred evenly, and makes to aoxidize grape After the mixed solution of saccharobacillus bacterial strain and D-glucitol and soil are sufficiently mixed, biofermentation process starts therewith, stops fermentation The soil moisture in entire fermentation cabin is heated to 30 ~ 35 DEG C by 4 electric heater units in the time positioned at biofermentation orlop portion, Generate the inorganic salts that nontoxic and density is noticeably greater than soil particle, fermented treated soil and inorganic lead salt mixture exist It is discharged under the rotation conveying effect of biofermentation Cang Xiafangchukouchu rotation conveying blade from biofermentation storehouse lower exit port, and according to By gravity fall to vibration sorting bed at carry out vibration sorting, by after purified treatment soil with it is generated inorganic Lead salt separates, wherein the soil after purified treatment is discharged through soil discharge port, and enters next soil treatment work Sequence, and pass through the inorganic lead salt that vibration sorting obtains and be discharged through waste residue row's mouth, the laggard quadrat of centralized recovery refines again;Biology hair Ferment-lead salt reactor internal capacity is 320m3, the dischargeable capacity in biofermentation storehouse therein is 125m3, soil averagely stops Staying fermentation time is 180min, and the operating voltage that biofermentation-lead salt reactor vibrates sorting bed is 380V, vibrates inclined-plane Angle is accurately fixed as 17.2 °, vibration frequency 35.5Hz.
2. the biofermentation soil remediation method of removal heavy metal lead according to claim 1, which is characterized in that biology hair The operating voltage of ferment-lead salt reactor stirrer paddle is 380V, and Stirring speed is 5 turns/min, atomizer Operating voltage is 15V, can generate the atomized drop that diameter is 15 μm.
3. the biofermentation soil remediation method of removal heavy metal lead according to claim 1, which is characterized in that biology hair The operating voltage of ferment-lead salt reactor electric heater unit is 380V, and heating temperature range is about 28 ~ 40 DEG C.
CN201811229900.8A 2016-06-02 2016-06-02 A kind of biofermentation soil remediation method removing heavy metal lead Withdrawn CN109226250A (en)

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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
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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LU92324B1 (en) * 2013-12-04 2015-06-05 Loës Pierre De Polluted soil depollution process
CN204247681U (en) * 2014-06-10 2015-04-08 苏州同和环保工程有限公司 A kind of heavy-metal contaminated soil treatment facility
CN105268737B (en) * 2015-11-15 2020-07-10 广州市第一市政工程有限公司 Heavy metal contaminated soil remediation equipment and remediation process thereof
CN105601052B (en) * 2016-03-17 2017-12-12 江苏锡沂高新区科技发展有限公司 The processing method of lead in a kind of removal electroplating wastewater

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