CN117225879A - Medicament for rapidly degrading explosive containing in polluted soil and application method thereof - Google Patents
Medicament for rapidly degrading explosive containing in polluted soil and application method thereof Download PDFInfo
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- 230000000593 degrading effect Effects 0.000 title description 6
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- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
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- 238000010276 construction Methods 0.000 claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 10
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- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
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- 244000005700 microbiome Species 0.000 claims description 10
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- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 8
- 239000004202 carbamide Substances 0.000 claims description 8
- 238000006065 biodegradation reaction Methods 0.000 claims description 7
- 235000016709 nutrition Nutrition 0.000 claims description 7
- 230000035764 nutrition Effects 0.000 claims description 7
- 238000005067 remediation Methods 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 6
- LIRDHUDRLFDYAI-UHFFFAOYSA-H iron(3+);trisulfite Chemical compound [Fe+3].[Fe+3].[O-]S([O-])=O.[O-]S([O-])=O.[O-]S([O-])=O LIRDHUDRLFDYAI-UHFFFAOYSA-H 0.000 claims description 6
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 4
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 claims description 4
- 238000006731 degradation reaction Methods 0.000 claims description 4
- TVACALAUIQMRDF-UHFFFAOYSA-N dodecyl dihydrogen phosphate Chemical compound CCCCCCCCCCCCOP(O)(O)=O TVACALAUIQMRDF-UHFFFAOYSA-N 0.000 claims description 4
- 239000008103 glucose Substances 0.000 claims description 4
- 230000002262 irrigation Effects 0.000 claims description 4
- 238000003973 irrigation Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 235000013379 molasses Nutrition 0.000 claims description 4
- 239000003895 organic fertilizer Substances 0.000 claims description 4
- 239000001103 potassium chloride Substances 0.000 claims description 4
- 235000011164 potassium chloride Nutrition 0.000 claims description 4
- FCBUKWWQSZQDDI-UHFFFAOYSA-N rhamnolipid Chemical compound CCCCCCCC(CC(O)=O)OC(=O)CC(CCCCCCC)OC1OC(C)C(O)C(O)C1OC1C(O)C(O)C(O)C(C)O1 FCBUKWWQSZQDDI-UHFFFAOYSA-N 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 4
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 4
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 4
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 4
- 235000012424 soybean oil Nutrition 0.000 claims description 4
- 239000003549 soybean oil Substances 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- YYRMJZQKEFZXMX-UHFFFAOYSA-N calcium;phosphoric acid Chemical compound [Ca+2].OP(O)(O)=O.OP(O)(O)=O YYRMJZQKEFZXMX-UHFFFAOYSA-N 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000002426 superphosphate Substances 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 2
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- YDIQKOIXOOOXQQ-UHFFFAOYSA-H dialuminum;trisulfite Chemical compound [Al+3].[Al+3].[O-]S([O-])=O.[O-]S([O-])=O.[O-]S([O-])=O YDIQKOIXOOOXQQ-UHFFFAOYSA-H 0.000 claims description 2
- FPNCFEPWJLGURZ-UHFFFAOYSA-L iron(2+);sulfite Chemical compound [Fe+2].[O-]S([O-])=O FPNCFEPWJLGURZ-UHFFFAOYSA-L 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
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- 238000003756 stirring Methods 0.000 claims description 2
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- 239000002912 waste gas Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 4
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims 2
- 210000003608 fece Anatomy 0.000 abstract description 12
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
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- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 2
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 2
- 235000019796 monopotassium phosphate Nutrition 0.000 description 2
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
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- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 description 1
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Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of soil environmental pollution restoration, and particularly relates to a medicament for biodegrading explosive pollutants in soil and a use method thereof. The medicament comprises a medicament A added before the construction of the biological pile and a medicament B used in the aerobic operation process of the biological pile; the medicament A comprises the following raw materials in parts by mass: 15-25 parts of solid nutrient source, 2-6 parts of pore regulator, 0.10 part of reducing agent, 0.2-1 part of first liquid nutrient source and 0.05 part of first surfactant; the solid nutrient source is any one or a mixture of more than two of domestic sewage pool sludge or pig manure, cow manure, chicken manure, sheep manure and other livestock manure in any proportion; the pore regulator comprises wheat bran and vegetation straw; the first liquid nutrient source comprises a sugar source, fat, a nitrogen source, and an inorganic salt; the first surfactant is an anionic surfactant. The agent provided by the invention can enable the TNT removal rate to be more than 80%, RDX to be more than 60% and HMX to be more than 75%.
Description
Technical Field
The invention belongs to the technical field of soil environmental pollution restoration, and particularly relates to a medicament for rapidly degrading an explosive-containing agent in polluted soil and a use method thereof.
Background
The energetic compound TNT has high detonation velocity, high detonation heat and good chemical stability, and becomes an explosive widely used by military and civil use in various countries. However, TNT produces a significant amount of TNT explosive residues into the water or soil during production, use and military operations, causing serious environmental pollution. The military agencies in the united states, canada, and many europe and asia have conducted energetic compound pollution source surveys to evaluate the impact of military operations on soil, groundwater, and surface water quality and to develop strategies for the remediation and repair of contaminated sites. North Carolina in the United states prescribes that the TNT content in the soil of the habitat should not exceed 7.2mg/L. Therefore, the method is a problem to be solved in China for repairing and treating the soil polluted by the explosive.
The microbial technology has more researches on repairing organic contaminated soil, but has less researches on biodegradation of energy-containing organic compound contaminated soil. The microbial remediation technology has low application cost, no secondary pollution to the environment, simple operation and higher technology application value. The microorganisms may degrade the energetic compounds in two ways: one is to take the energetic compound as the only carbon source and energy source to degrade or mineralize the energetic compound: the other is that certain organic matters cannot be used as the sole carbon source and energy source of the microorganism, and a co-metabolism substrate needs to be added to degrade the energy-containing compound in a co-metabolism mode. In addition, exogenous strains can be added to degrade the energetic compounds under the condition of artificial optimization, and the microbial remediation technology has the characteristics of economy, environmental protection, great potential for degrading organic pollutants and the like, and has unique effects and significance in the remediation treatment process of the energetic compounds polluted soil.
The invention patent 202111629257.X discloses a plant-microorganism symbiotic restoration method for TNT energetic compound contaminated soil, which specifically comprises the steps of preparing TNT energetic compound degrading microorganism composite bacterial liquid, applying TNT energetic compound degrading microorganism composite bacterial liquid, selecting TNT energetic compound enrichment degradation plants and planting TNT energetic compound enrichment degradation plants for symbiotic restoration treatment, wherein the TNT purification rate in the energetic compound contaminated soil is more than or equal to 90 percent after the treatment for 90-120 days.
Research on the co-metabolism substrate material formula and the use method thereof is carried out, the improvement of the microorganism restoration strength of the soil polluted by the energy-containing explosive is of great importance, and a new approach can be provided for microorganism restoration of the soil polluted by the energy-containing compound existing in fields such as ammunition destruction, military training, military industry factories and the like.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the specific microorganism in the traditional bioremediation treatment technology only degrades specific compound types, the site conditions and environmental factors have great influence on the efficiency of the microbial remediation and the restoration time is long.
In a first aspect, the invention provides a medicament for biodegrading explosive pollutants in soil, the medicament comprising a medicament A for addition before the construction of a biological pile and a medicament B for use during aerobic operation of the biological pile; the medicament A comprises the following raw materials in parts by mass: 15-25 parts of solid nutrient source, 2-6 parts of pore regulator, 0.10 part of reducing agent, 0.2-1 part of first liquid nutrient source and 0.05 part of first surfactant; the solid nutrient source is any one or a mixture of more than two of domestic sewage pool sludge or pig manure, cow manure, chicken manure, sheep manure and other livestock manure in any proportion; the pore regulator comprises wheat bran and vegetation straw; the first liquid nutrient source comprises a sugar source, fat, a nitrogen source, and an inorganic salt; the first surfactant is an anionic surfactant.
The medicament B is a solution, the solute comprises a second liquid nutrition source and a second surfactant, the total concentration of the second liquid nutrition source and the second surfactant is 0.1-0.2%, and the mass ratio of the second liquid nutrition source to the second surfactant is 7:3-5:5; the second liquid nutrient source includes a sugar source, a nitrogen source, and an inorganic salt.
Preferably, the first liquid nutrient source comprises 5 to 80 percent of molasses and 1 to 2 percent of KH 2 PO 4 0.1 to 10 percent of urea, 10 to 50 percent of sodium sulfide, 10 to 15 percent of ferrous sulfite and 10 to 20 percent of soybean oil, wherein the sum of the mass percentages of the components is 100 percent.
Preferably, the second liquid nutrition source comprises 30% -40% of glucose, 8% -12% of calcium superphosphate, 2% -4% of urea, 2% -4% of potassium chloride, 30% -40% of liquid organic fertilizer, 16% -20% of sodium thiosulfate and 16% -20% of ferric sulfite, and the sum of the mass percentages of the components is 100%.
Preferably, the second surfactant comprises 16-20% of butyl acetate, 2-4% of lauryl phosphate, 30-40% of rhamnolipid, 16-20% of sodium dodecyl sulfate and 6-10% of anionic surfactant, and the sum of the mass percentages of the components is 100%.
Further, the concentration of the solution B of the medicament is 0.116%, and the solute components comprise 17.24% of glucose, 4.31% of superphosphate, 1.72% of urea, 1.72% of potassium chloride, 17.24% of supernatant obtained by filtering a crushed microbial organic fertilizer, 8.62% of sodium thiosulfate, 8.62% of ferric sulfite, 8.62% of butyl acetate, 1.72% of lauryl phosphate, 17.24% of rhamnolipid, 8.62% of sodium dodecyl sulfate and 4.31% of anionic surfactant.
Preferably, the reducing agent is iron powder, and the diameter is not more than 100 μm.
Preferably, the wheat bran in the pore regulator accounts for 60-80% of the total mass of the pore regulator; the vegetation straw accounts for 20-40% of the total mass of the pore regulator, and the length is between 2 cm and 3 cm.
In a second aspect, the invention provides a method of using the agent of the first aspect for bioremediation of explosive-contaminated soil: mixing and stirring the agent A and explosive-polluted soil for anaerobic remediation, wherein each 1 part by mass of the agent A is mixed with not more than 20 parts by mass of the polluted soil; after the anaerobic repair is finished, performing aerobic repair, and adding a reagent B for repair during the aerobic repair.
Preferably, the method further comprises contaminated soil pretreatment and bio-heap construction; the pretreatment of the polluted soil comprises the following steps: removing non-soil substances such as stones and construction waste by adopting screening equipment, and crushing large-particle-size soil blocks by adopting crushing equipment so that the soil is uniform and the non-soil substances such as stones and construction waste are not contained; lime is adopted to increase the pH value of the soil, or sulfur, ammonium sulfate, aluminum sulfate and aluminum sulfite are adopted to reduce the pH value of the soil, so that the pH value is between 6 and 9;
the construction of the biological pile body comprises the following steps: after the contaminated soil and the medicament are uniformly mixed, the biological pile body is built. A drip irrigation pipe network system is arranged at the top of the biological pile and wraps and covers the biological pile body so as to realize the sealing effect of the pile body; the pile body is provided with a ventilation pipe network, and is externally connected with an air extraction device and a waste gas treatment device, so that ventilation of the pile body during aerobic operation is ensured.
Further, after the construction of the biological pile is completed, the operation mode is anaerobic-aerobic intermittent operation;
according to the mode of anaerobic and then aerobic, and anaerobic: aerobic = 10d: and 5d, repeatedly and circularly running in a mode. When in anaerobic operation, the pile body is kept airtight, and ventilation or addition of the medicament B is not carried out; when in aerobic operation, a ventilation valve and air extraction equipment are opened to ventilate the pile body, so that the oxygen content in the soil is improved, an intermittent aerobic environment is provided for microorganisms, and a medicament B is added in an aerobic stage, so that moisture and nutrient sources during operation are ensured; the aerobic and anaerobic intermittent operation is used for strengthening the degradation of energetic compound pollutants in the soil by microorganisms.
The invention has the beneficial effects that: the medicament and the use method thereof provided by the invention can effectively reduce the concentration of pollutants containing energetic materials such as TNT, RDX, HMX and the like in polluted raw soil, the removal rate of the energetic compound TNT can reach more than 80%, the removal rate of the RDX reaches more than 60% and the removal rate of the HMX reaches more than 75% after 30 days of biological heap operation.
Detailed Description
The invention is further illustrated below with reference to examples.
The experimental methods used in the following examples are conventional methods unless otherwise specified.
Materials, reagents and the like used in the examples described below are commercially available unless otherwise specified.
The following examples are set forth to further illustrate the present invention so that those skilled in the art may better understand the present invention and practice it, but are not intended to be limiting thereof.
Example 1
And (3) selecting energetic compound contaminated soil of the explosive contaminated site to carry out medicament formula implementation, uniformly mixing the pretreated contaminated soil with the medicament, and constructing a biological pile system. The biological reactor agent comprises solid nutrient sources: 12 parts of sludge, 5 parts of pig manure and 1 part of cow manure; pore regulator: 1 part of crushed straw and 2.6 parts of wheat bran; reducing agent: 0.1 part of reduced iron powder; liquid nutrient source a: molasses 0.02 part, monopotassium phosphate 0.005 part, urea 0.02 part, sodium sulfide 0.1 part, ferric sulfite 0.1 part and soybean oil 0.005 part; surfactant a: 0.05 part of anionic surfactant. In example 1, a total of 3 stacks were constructed and operated.
After the pile is built, the pile is operated for 10 days under the anoxic condition and then is operated for 5 days under the aerobic condition, and the period duration is 15 days. During the anoxic operation, the pile body needs to be kept in a sealing state; during the aerobic operation, the air extraction equipment circularly operates in a mode of starting up for 30min and then shutting down for 30min, and the ventilation is as follows: day 1-2 100m 3 /h, day 3-4, 200m 3 /h, day 5, 100m 3 And/h. And meanwhile, the medicament B is sprayed to the pile body through a drip irrigation pipe network, and the internal environment of the pile body is regulated. The daily dosage of the medicament B in the aerobic operation period is as follows: daily addition of 0.2m on day 1-2 3 0.3m is added daily on day 3-4 3 Day 5 addition of 0.5m 3 。
Through detection, the TNT concentration in the selected polluted raw soil is about 133.02mg/kg, the RDX concentration is about 45.91mg/kg, and the HMX concentration is about 9.18mg/kg. After 15 days of operation of the heap, the removal rate of the energetic compound TNT was about 96.56%, the removal rate of RDX was about 93.84% and the removal rate of HMX was about 96.80%. The operation was carried out for 2 cycles for a total of 30 days, with the removal of the energetic compound TNT of interest being about 97.48%, the removal of RDX being about 93.04% and the removal of HMX being about 92.97%.
Example 2
And (3) selecting energetic compound contaminated soil of the explosive contaminated site to carry out medicament formula implementation, uniformly mixing the pretreated contaminated soil with the medicament, and constructing a biological pile system. The biological reactor agent comprises solid nutrient sources: 17 parts of pig manure and 0.5 part of cow manure; pore regulator: 1 part of crushed straw and 2.6 parts of wheat bran; reducing agent: 0.1 part of reduced iron powder; liquid nutrient source a: molasses 0.6 part, monopotassium phosphate 0.005 part, urea 0.001 part, sodium sulfide 0.1 part, ferric sulfite 0.1 part and soybean oil 0.005 part; surfactant a: 0.05 part of anionic surfactant. In example 2, a total of 3 stacks were constructed and operated.
After the pile is built, the pile is operated for 10 days under the anoxic condition and then is operated for 5 days under the aerobic condition, and the period duration is 15 days. During the anoxic operation, the pile body needs to be kept in a sealing state; during the aerobic operation, the air extraction equipment circularly operates in a mode of starting up for 30min and then shutting down for 30min, and the ventilation is as follows: day 1-2 100m 3 /h, day 3-4, 200m 3 /h, day 5, 100m 3 And/h. And meanwhile, the medicament B is sprayed to the pile body through a drip irrigation pipe network, and the internal environment of the pile body is regulated. The daily dosage of the medicament B in the aerobic operation period is as follows: daily addition of 0.2m on day 1-2 3 0.3m is added daily on day 3-4 3 Day 5 addition of 0.5m 3 。
Through detection, the TNT concentration in the selected polluted raw soil is about 55.85mg/kg, the RDX concentration is about 49.41mg/kg, and the HMX concentration is about 1.36mg/kg. After 15 days of operation of the heap, the removal rate of the energy-containing compound TNT was about 83.91%, the removal rate of RDX was about 64.49%, and the removal rate of HMX was about 62.82%. The operation was carried out for 2 cycles for a total of 30 days, with the removal of the energetic compound TNT of interest being about 98.72%, the removal of RDX being about 88.35% and the removal of HMX being about 77.93%.
The content of the energetic pollutant before and after the addition of the biological reactor medicament in the operation process of the comprehensive embodiment and the time of the repair operation can be known, and the medicament and the application method thereof have the characteristic of rapid biodegradation of the energetic pollutant.
Claims (10)
1. The preparation method is characterized in that the preparation method comprises the steps of adding a preparation A before the construction of a biological pile and a preparation B used in the anaerobic and aerobic intermittent operation process of the biological pile; the medicament A comprises the following raw materials in parts by mass: 15-25 parts of solid nutrient source, 2-6 parts of pore regulator, 0.10 part of reducing agent, 0.2-1 part of first liquid nutrient source and 0.05 part of first surfactant; the solid nutrient source is any one or a mixture of more than two of domestic sewage pool sludge or livestock manure in any proportion; the pore regulator comprises wheat bran and vegetation straw; the first liquid nutrient source comprises a sugar source, fat, a nitrogen source, and an inorganic salt; the first surfactant is an anionic surfactant;
the medicament B is a solution, the solute comprises a second liquid nutrition source and a second surfactant, the total concentration of the second liquid nutrition source and the second surfactant is 0.1-0.2%, and the mass ratio of the second liquid nutrition source to the second surfactant is 7:3-5:5; the second liquid nutrient source includes a sugar source, a nitrogen source, and an inorganic salt.
2. The agent for the rapid biodegradation of an explosive-containing chemical in contaminated soil as claimed in claim 1, wherein said first liquid nutrient source comprises 5% to 80% molasses, 1% to 2% kh 2 PO 4 0.1 to 10 percent of urea, 10 to 50 percent of sodium sulfide, 10 to 15 percent of ferrous sulfite and 10 to 20 percent of soybean oil, wherein the sum of the mass percentages of the components is 100 percent.
3. The agent for the rapid biodegradation of an explosive-containing chemical in contaminated soil according to claim 1, wherein the second liquid nutrient source comprises 30% -40% glucose, 8% -12% superphosphate, 2% -4% urea, 2% -4% potassium chloride, 30% -40% liquid organic fertilizer, 16% -20% sodium thiosulfate and 16% -20% ferric sulfite, and the sum of the above components is 100% by mass.
4. The agent for the rapid biodegradation of an explosive-containing chemical in contaminated soil according to claim 1, wherein the second surfactant comprises 16% to 20% butyl acetate, 2% to 4% lauryl phosphate, 30% to 40% rhamnolipid, 16% to 20% sodium dodecyl sulfate and 6% to 10% anionic surfactant, the sum of the above components being 100% by mass.
5. The agent for the rapid biodegradation of an explosive-containing chemical in contaminated soil according to claim 3 or 4, wherein the concentration of the agent B solution is 0.116%, and the solute components are 17.24% glucose, 4.31% superphosphate, 1.72% urea, 1.72% potassium chloride, 17.24% liquid organic fertilizer, 8.62% sodium thiosulfate, 8.62% ferric sulfite, 8.62% butyl acetate, 1.72% lauryl phosphate, 17.24% rhamnolipid, 8.62% sodium dodecyl sulfate, and 4.31% anionic surfactant.
6. The agent for the rapid degradation of an explosive-containing chemical in contaminated soil according to claim 1, wherein the reducing agent is iron powder, and the diameter is not more than 100 μm.
7. The agent for the rapid biodegradation of explosives in contaminated soil according to claim 1, wherein wheat bran in the pore regulator accounts for 60% -80% of the total mass of the pore regulator; the vegetation straw accounts for 20-40% of the total mass of the pore regulator, and the length is between 2 cm and 3 cm.
8. A method of using the agent of claim 1 for bioremediation of explosive-contaminated soil, comprising the steps of: mixing and stirring the agent A and explosive-polluted soil for anaerobic remediation, wherein each 1 part by mass of the agent A is mixed with not more than 20 parts by mass of the polluted soil; after the anaerobic repair is finished, performing aerobic repair, and adding a reagent B for repair during the aerobic repair.
9. The method of use of claim 8, further comprising contaminated soil pretreatment and bio-stack construction; the pretreatment of the polluted soil comprises the following steps: removing non-soil substances such as stones and construction waste by adopting screening equipment, and crushing large-particle-size soil blocks by adopting crushing equipment so that the soil is uniform and the non-soil substances such as stones and construction waste are not contained; lime is adopted to increase the pH value of the soil, or sulfur, ammonium sulfate, aluminum sulfate and aluminum sulfite are adopted to reduce the pH value of the soil, so that the pH value is between 6 and 9;
the construction of the biological pile body comprises the following steps: after the contaminated soil and the medicament are uniformly mixed, the biological pile body is built; a drip irrigation pipe network system is arranged at the top of the biological pile and wraps and covers the biological pile body so as to realize the sealing effect of the pile body; the pile body is provided with a ventilation pipe network, and is externally connected with an air extraction device and a waste gas treatment device, so that ventilation of the pile body during aerobic operation is ensured.
10. The method of claim 9, wherein the operation mode is an anaerobic-aerobic intermittent operation mode after the completion of the construction of the biological reactor;
according to the mode of anaerobic and then aerobic, and anaerobic: aerobic = 10d:5d, repeatedly and circularly running in a mode; when in anaerobic operation, the pile body is kept airtight, and ventilation or addition of the medicament B is not carried out; when in aerobic operation, the ventilation valve and the air extraction equipment are opened to ventilate the pile body, so that the oxygen content in the soil is improved, an intermittent aerobic environment is provided for microorganisms, and the agent B is added in an aerobic stage, so that the moisture and nutrient sources in the operation period are ensured.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118222299A (en) * | 2024-05-17 | 2024-06-21 | 中国科学技术大学 | In-situ restoration agent and restoration method for explosive-polluted soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118222299A (en) * | 2024-05-17 | 2024-06-21 | 中国科学技术大学 | In-situ restoration agent and restoration method for explosive-polluted soil |
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