CN113736470B - Method for preparing mining area soil conditioner from wet sludge in alpine and high-altitude areas - Google Patents

Method for preparing mining area soil conditioner from wet sludge in alpine and high-altitude areas Download PDF

Info

Publication number
CN113736470B
CN113736470B CN202111083037.1A CN202111083037A CN113736470B CN 113736470 B CN113736470 B CN 113736470B CN 202111083037 A CN202111083037 A CN 202111083037A CN 113736470 B CN113736470 B CN 113736470B
Authority
CN
China
Prior art keywords
heat treatment
soil conditioner
wet sludge
mining area
preparing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN202111083037.1A
Other languages
Chinese (zh)
Other versions
CN113736470A (en
Inventor
刘树根
陈越
瞿广飞
彭语欣
孔馨
金熠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunming University of Science and Technology
Original Assignee
Kunming University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kunming University of Science and Technology filed Critical Kunming University of Science and Technology
Priority to CN202111083037.1A priority Critical patent/CN113736470B/en
Publication of CN113736470A publication Critical patent/CN113736470A/en
Application granted granted Critical
Publication of CN113736470B publication Critical patent/CN113736470B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00Soil-conditioning materials or soil-stabilising materials
    • C09K17/40Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05DINORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D3/00Calcareous fertilisers
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/80Soil conditioners
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2101/00Agricultural use

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Pest Control & Pesticides (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Fertilizers (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention discloses a method for preparing a mining area soil conditioner from wet sludge in a high-cold high-altitude area, and belongs to the technical field of organic solid waste treatment and resource utilization. The method comprises the following steps: mixing wet sludge to be treated with a drying product to adjust the water content, then adding a filler and a nitrogen fixation modifier, and carrying out biological drying treatment on the obtained mixture; adding a heavy metal remover and a regulator into part of the dried material, and then carrying out low-oxygen heat treatment for 30-60 min at the temperature of 650-860 ℃; after the heat treatment product is screened, undersize fine particles are mixed with the other part of the dried material. The soil conditioner prepared by the invention has obvious effects on passivating heavy metals, retaining water and moisture, enhancing soil fertility and growing crops.

Description

Method for preparing mining area soil conditioner from wet sludge in alpine and high-altitude areas
Technical Field
The invention belongs to the technical field of organic solid waste treatment and resource utilization, and particularly relates to a method for preparing a mining area soil conditioner from wet sludge in an alpine and high-altitude area.
Background
With the increasing population and the continuous promotion of urbanization process in China, the living standard of the China is continuously improved, and the sludge production amount is continuously increased. Calculated according to that 10000 tons of sewage generate 5 tons of sludge, the sludge yield in 2017 years in the high-cold high-altitude Lasa area reaches 8.23 multiplied by 104t (water content 80%). Although landfill is a typical mode of sludge treatment, the sludge has high moisture content, occupies reservoir capacity during landfill, and has the problems that a landfill operation area is obviously collapsed, so that the problem of sludge going to the way is effectively solved, and the problem to be solved urgently in a sewage treatment plant.
The compost treatment of sludge for agriculture is one of the treatment and disposal methods. The sludge contains rich components such as nitrogen, phosphorus and organic matters, and can provide a good external environment for soil improvement and plant growth. However, when nutrient substances in the sludge are directly used for agriculture, the plant absorption and utilization rate is low, the sludge may contain harmful substances such as heavy metals, organic pollutants, pathogenic bacteria and the like, potential environmental risks exist, the health and the ecological environment of human beings are influenced, and sludge treatment products specified in China cannot enter a food chain.
The prior patent ZL201710530980.X discloses a method for producing a soil conditioner by using poultry and livestock manure, which comprises the steps of mixing and fermenting bacillus subtilis microbial bacteria and the like to prepare decomposed strains, then mixing the decomposed strains with water, adding chicken manure and pig manure for composting to prepare composite microbial bacteria, uniformly mixing the composite microbial bacteria with leaf mold and green zeolite to prepare soil powder, and then putting the powder into a barrel of water for culturing to prepare the soil conditioner. Patent ZL201710787362.3 discloses a limestone mining area ecological restoration method, which uses lime pit slag as a base material, is supplemented with a small amount of loam, ecological organic fertilizer and the like, and is matched with alfalfa and lavender for planting, so that the purpose of mining area ecological restoration is achieved. Patent ZL202011085270.9 discloses a soil microorganism culture method for improving soil in alpine and high-altitude areas, which comprises the steps of mixing enriched and cultured microorganisms with a liquid culture medium, spraying the mixture into soil in alpine and high-altitude areas, turning the soil over, spraying straw pulp on the surface of the soil, enhancing the soil fertility and promoting the growth of crops.
Generally, the climate conditions in the alpine and high-altitude areas are severe, the ecological environment is fragile, the organic matter content in the soil in the mining area is obviously insufficient, the microbial population structure is single, the microbial quantity is obviously low, and the ecological environment restoration in the mining area is relatively more difficult. The method takes sludge to be treated urgently as a source, adds the special crop straws in the area for mixed composting treatment, improves the performance of the compost product by adding the ferric salt nitrogen fixation agent, the heavy metal remover, the heat treatment regulator and the like, has high humification degree and high nitrogen and phosphorus content of the obtained product, has good solidification effect on potential heavy metals, and can be widely applied to ecological environment restoration in mining areas.
Disclosure of Invention
The invention aims to provide a method for preparing a mining area soil conditioner by wet sludge in alpine and high-altitude areas, wherein the wet sludge generated by a sewage treatment plant in the area is pretreated, then a nitrogen fixation modifier is added, and biological drying treatment is carried out after uniform mixing; then adding a part of the dried product into a heavy metal remover and regulator palygorskite mineral powder for low-oxygen heat treatment; the obtained product is screened, and the fine material is mixed with the other part of the original dried product. The prepared soil conditioner meets the standards of 'sludge quality for soil improvement by sludge treatment in urban sewage treatment plants' GB/T24600-.
The object of the invention is achieved by the following steps:
(1) adjusting the moisture content of wet sludge to be treated to 63-68% to obtain a pretreatment material, and mixing the pretreatment material with a filler to prepare a mixture;
(2) adding a nitrogen fixation modifier into the mixture obtained in the step (1), uniformly mixing, and then sending the mixture to a drum-type reactor for biological drying treatment;
(3) adding a heavy metal remover and a heat treatment regulator into part of the dried product obtained in the step (2), and then carrying out low-oxygen heat treatment;
(4) and (4) mixing the heat treatment product obtained in the step (3) with the dried product of the rest part obtained in the step (2), and using the obtained product for repairing and improving the soil of the mining area.
Preferably, the filler in the step (1) is a mixture of ceramsite and highland barley straw, and the mass ratio of the filler to the pretreatment material is 1: (8-20), the light highland barley straws with certain strength are added into the pile body on the basis of the ceramsite, so that the filling effect is better.
Preferably, the length of the highland barley straws is 3-6 cm, and the mass ratio of the highland barley straws to the ceramsite is 1: (1-2).
Preferably, the nitrogen fixation modifier in the step (2) is ferric trichloride, and the mass ratio of the ferric trichloride to the pretreatment material is 1: (30-50); fe3+Can fix ammonium nitrogen to prevent nitrogen loss by combining with organic acid in compost materials; in addition, FeCl3Has polymerization function, can be chelated with humic acid in the compost body to adsorb phosphorus, and improves the quality of compost products.
Preferably, the air exhaust intensity of the biological drying reactor in the step (2) is 0.3-0.9min-1 kg-1The drum reactor takes 6-12 minutes to make one turn.
Preferably, the heat treatment regulator is palygorskite mineral powder, and the mass ratio of the palygorskite mineral powder to the dried product is 1: (15-30); further, the mass ratio of the palygorskite mineral powder to the dried product is 1: (20-24); the addition of the palygorskite powder obviously promotes the adsorption effect of the low-oxygen heat treatment product on heavy metals and enhances the effect of passivating the metals when the palygorskite powder is applied to a mine area.
Preferably, the heavy metal remover in the step (3) is CaCl2、MgCl2Any one or the combination of the two, the mass ratio of the heavy metal remover to the dried product is 1: (70-100); added CaCl2Or MgCl2Decomposing by oxygen to separate out chlorine, and then reacting heavy metal oxide with chlorine: MeO + Cl2=MeCl2+1/2O2With MeCl2And the heavy metal possibly existing in the raw material is removed when the raw material enters a gas phase at high temperature.
Preferably, the low-oxygen heat treatment temperature in the step (3) is 650-860 ℃, the air supply rate is controlled so that the oxygen content in the tail gas is 0.3-1.2%, and the heat treatment time is 30-60 min.
Furthermore, in the step (3), the low-oxygen heat treatment temperature is 750-800 ℃, the heat treatment time is 40-60 min, the gas supply rate is controlled so that the oxygen content in the tail gas is 0.5-1.0%, the curing effect of the heat treatment product on heavy metals is obviously improved, and the phosphorus content is as high as 5-7%.
Preferably, the part of the dried product obtained in the step (3) is 40-50% of the dried product obtained in the step (2).
Preferably, the heat-treated product in step (4) needs to be subjected to screening treatment, the obtained coarse particles are returned to step (1) as a filler, and the rest undersize fine particles are mixed with the rest of the dried product in step (2), wherein the screening treatment is performed by using a vibrating screen with the screen hole diameter of 10 mm.
The invention has the beneficial effects that:
1) the wet sludge is subjected to biological drying treatment, so that the pathogenic microorganisms can be effectively killed at high temperature, the moisture can be removed more obviously, the formed humus has obvious effects on the aspects of preserving moisture and soil fertility, and the heavy metal possibly existing in the process of improving the soil in the mining area can be solidified.
2) When the wet sludge is dried, ferric trichloride salt is added as a nitrogen fixing agent, the nitrogen content of the product is high, and the ferric trichloride salt can be chelated with humic acid to adsorb phosphorus, so that the quality of the compost product is improved.
3) Adding a heavy metal remover and a regulator in the low-temperature heat treatment process, converting heavy metal oxides into corresponding chlorides to enter tail gas, and removing a little heavy metal originally existing in the sludge; in addition, the regulator and the sludge form a carbon-containing magnesium, aluminum and silicon compound during low-oxygen heat treatment, and the passivation effect on heavy metals is obvious when the regulator and the sludge are used for restoring and improving the soil in a mining area.
Detailed Description
The present invention is described in detail with reference to the following specific examples, which are carried out on the premise of the technical solution of the present invention, and the detailed implementation manner and the specific operation process are given, but the protection scope of the present invention is not limited to the contents.
Example 1
Mixing dewatered sludge (water content of about 81%) and dried sludge (water content of about 22%) in urban sewage plant to prepare pretreatment material with water content of 65%, treating highland barley straw into 4 cm small segments, mixing with ceramsite by mass ratio to form filler, uniformly mixing the obtained filler and pretreatment material by 1/20 mass ratio, adding FeCl according to pretreatment material mass 1/403Then the mixture is sent to a drum-type biological drying device for treatment, the rotating speed of the drum is set to be 7 r/min, and the air extraction intensity of one side of the drying device is 0.3L min-1 kg-1
After biological drying treatment, a dried product with the water content of 54 percent is obtained, and 50 percent of the dried product is taken to be subjected to low-oxygen heat treatment. Before heat treatment, dryingAdding CaCl into the product2And palygorskite mineral powder, wherein the proportion of the palygorskite mineral powder to the dried material is respectively 1: 80. 1: 20. the mixed material is thermally treated in a reaction furnace at 700 ℃ for 50 min, the oxygen content in the tail gas at the outlet of the reaction furnace is monitored, and the air supply quantity at the inlet is adjusted by the level of 0.8 percent of the oxygen concentration in the tail gas.
And (3) uniformly mixing the heat-treated product with the other 50% of dried product to obtain the prepared soil conditioner, wherein the nitrogen content and the phosphorus content are respectively 2.1% and 5.5%, the lead content and the copper content in each kilogram of material are respectively 400 mg and 800 mg, other heavy metals are low to undetectable levels, and nutrient indexes and pollutant limit values meet the standards of 'sludge for treating sludge in urban sewage treatment plants' GB/T24600 plus 2009 for land improvement.
Example 2
Mixing dewatered sludge (water content of about 82%) and dried sludge (water content of about 21%) in urban sewage plant to prepare pretreatment material with water content of 64%, treating highland barley straw into 3 cm small segments, mixing the segments with ceramsite according to the mass ratio to form filler, uniformly mixing the filler and the pretreatment material according to the mass ratio of 1/12, and adding FeCl according to the mass ratio of 1/35 of the pretreatment material3Then the mixture is sent to a drum-type biological drying device for treatment, the rotation speed of the drum is set to be 12 r/min, and the air exhaust intensity at one side of the drying device is 0.7L min-1 kg-1
After biological drying treatment, a dried product with the water content of 52 percent is obtained, and the dried product with the water content of 40 percent is taken to be subjected to low-oxygen heat treatment. Before heat treatment, CaCl is added into the dried product2And palygorskite mineral powder, wherein the proportion of the palygorskite mineral powder to the dried material is respectively 1: 90. 1: 15. the mixed material is subjected to heat treatment in a reaction furnace at 800 ℃ for 30 min, and the air supply quantity at the inlet is adjusted according to the level of 0.6 percent of oxygen concentration in tail gas.
And (3) uniformly mixing the heat-treated product with the other 60% of dried product to obtain the prepared soil conditioner, wherein the nitrogen content and the phosphorus content are respectively 2.3% and 5.0%, the lead content and the copper content in each kilogram of material are respectively 360 mg and 730 mg, other heavy metals are low to the undetectable level, and the nutrient index and the pollutant limit value meet the standards of GB/T24600-.
Example 3
Mixing dewatered sludge (water content is about 83%) and dried sludge (water content is about 21%) in urban sewage plant to prepare pretreatment material with water content of 65%, processing highland barley straw into small segments of 5 cm, mixing the small segments with ceramsite according to a mass ratio of 1:2 to form filler, uniformly mixing the obtained filler and the pretreatment material according to a mass ratio of 1/18, and adding FeCl according to a mass ratio of 1/45 of the pretreatment material3Then the mixture is sent to a drum-type biological drying device for treatment, the rotating speed of the drum is set to be 10 r/min, and the air extraction intensity of one side of the drying device is 0.9L min-1 kg-1
After biological drying treatment, a dried product with the water content of 53 percent is obtained, and the dried product with the water content of 50 percent is taken to be subjected to low-oxygen heat treatment. Before heat treatment, adding a heavy metal remover and palygorskite ore powder into a dried product, wherein the ratio of the heavy metal remover to the palygorskite ore powder to the dried material is 1: 70. 1: 25, wherein the heavy metal remover is CaCl2、MgCl2Mixing the components in equal mass. The mixed material is heat treated in a reaction furnace at 860 ℃ for 30 min, and the air supply at the inlet is adjusted according to the level of 0.4 percent of oxygen concentration in tail gas.
And (3) uniformly mixing the heat-treated product with the other 50% of dried product to obtain the prepared soil conditioner, wherein the nitrogen content and the phosphorus content are respectively 1.9% and 5.5%, the lead content and the copper content in each kilogram of material are respectively 350 mg and 720 mg, other heavy metals cannot be detected, and the nutrient index and the pollutant limit value meet the standards of GB/T24600-.
Example 4
Mixing dewatered sludge (with water content of about 83%) of an urban sewage plant with dried sludge (with water content of about 21%) to prepare a pretreatment material with water content of 64%; processing the highland barley straws into 5 cm small sections, mixing the highland barley straws with ceramsite according to the mass ratio of 1:2 to form a filler, and mixing the filler and the pretreatment material in a ratio of 1: 15, adding FeCl according to the mass of 1/50 of the pretreated material3Then the mixture is sent to a drum-type biological drying device for treatment, the rotating speed of the drum is set to be 10 r/min, and the air extraction intensity at one side of the drying device is 1L min-1 kg-1
After biological drying treatment, a dried product with the water content of 51% is obtained, and 50% of the dried product is taken to be subjected to low-oxygen heat treatment. Before heat treatment, adding a heavy metal remover and palygorskite mineral powder into a dried product, wherein the ratio of the heavy metal remover to the palygorskite mineral powder to the dried product is 1: 95. 1: 25, wherein the heavy metal remover is CaCl2、MgCl2Mixing the components in equal mass. The mixed material is thermally treated in a reaction furnace at 860 ℃ for 30 min, and the air supply quantity at the inlet is adjusted according to the level of 0.4 percent of oxygen concentration in tail gas.
And (3) passing the heat-treated product through a vibrating screen with 10mm sieve pores, returning the part above the sieve to the pretreatment material as a filler, and uniformly mixing the part below the sieve with the other 50% of dried product to obtain the prepared soil conditioner, wherein the nitrogen content and the phosphorus content are respectively 2.5% and 6%, the lead content and the copper content in each kilogram of the material are respectively 290 mg and 650 mg, other heavy metals cannot be detected, and the nutrient index and the pollutant limit value meet the standards of GB/T24600 plus 2009.

Claims (7)

1. A method for preparing a mining area soil conditioner from wet sludge in a high-cold high-altitude area is characterized by comprising the following steps:
(1) adjusting the moisture content of wet sludge to be treated to 63-68% to obtain a pretreatment material, and mixing the pretreatment material with a filler to prepare a mixture;
(2) adding a nitrogen fixation modifier into the mixture obtained in the step (1), uniformly mixing, and then sending the mixture to a drum-type reactor for biological drying treatment; the nitrogen fixation modifier is ferric trichloride salt, and the mass ratio of the nitrogen fixation modifier to the mixture is 1 (30-50);
(3) adding a heavy metal remover and a heat treatment regulator into part of the dried product obtained in the step (2), and then carrying out low-oxygen heat treatment; the low-oxygen heat treatment temperature is 650-860 ℃, the gas supply rate is controlled so that the oxygen content in the tail gas is 0.3-1.2%, and the heat treatment time is 30-60 min; the heavy metal remover is CaCl2、MgCl2Any one or the combination of the two, the mass ratio of the heavy metal remover to the dried product is 1: (70-100);
(4) and (4) mixing the heat treatment product obtained in the step (3) with the dried product of the rest part obtained in the step (2), and using the obtained product for repairing and improving the soil of the mining area.
2. The method for preparing the soil conditioner for the mining area from the wet sludge in the alpine and high-altitude areas according to claim 1, wherein the filler in the step (1) is a mixture of ceramsite and highland barley straws, and the mass ratio of the filler to the pretreatment material is 1: (8-20).
3. The method for preparing the soil conditioner in the mining area from the wet sludge in the alpine and high-altitude areas according to claim 2, wherein the length of the highland barley straws is 3-6 cm, and the mass ratio of the highland barley straws to the ceramsite is 1: (1-2).
4. The method for preparing the soil conditioner of the mining area from the wet sludge in the alpine and high-altitude areas according to claim 1, wherein the air exhaust intensity of the biological drying reactor in the step (2) is 0.3-0.9min-1 kg-1The drum reactor takes 6-12 minutes to make one turn.
5. The method for preparing the mining area soil conditioner from the wet sludge in the alpine and high-altitude areas according to claim 1, wherein the heat treatment regulator is palygorskite mineral powder, and the mass ratio of the palygorskite mineral powder to the dried product is 1: (15-30).
6. The method for preparing the soil conditioner of the mining area from the wet sludge in the alpine and high-altitude areas according to claim 1, wherein the partial drying product obtained in the step (3) is 40-50% of the drying product obtained in the step (2).
7. The method for preparing the soil conditioner in the mining area from the wet sludge in the alpine and high-altitude areas according to claim 1, wherein the heat treatment product in the step (4) needs to be subjected to screening treatment, the obtained coarse particles are returned to the step (1) to be used as a filling agent, and the rest undersize fine particles are mixed with the rest of the dried product in the step (2), and the screening treatment is carried out by using a vibrating screen with the mesh diameter of 10 mm.
CN202111083037.1A 2021-09-15 2021-09-15 Method for preparing mining area soil conditioner from wet sludge in alpine and high-altitude areas Expired - Fee Related CN113736470B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111083037.1A CN113736470B (en) 2021-09-15 2021-09-15 Method for preparing mining area soil conditioner from wet sludge in alpine and high-altitude areas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111083037.1A CN113736470B (en) 2021-09-15 2021-09-15 Method for preparing mining area soil conditioner from wet sludge in alpine and high-altitude areas

Publications (2)

Publication Number Publication Date
CN113736470A CN113736470A (en) 2021-12-03
CN113736470B true CN113736470B (en) 2022-07-19

Family

ID=78739208

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111083037.1A Expired - Fee Related CN113736470B (en) 2021-09-15 2021-09-15 Method for preparing mining area soil conditioner from wet sludge in alpine and high-altitude areas

Country Status (1)

Country Link
CN (1) CN113736470B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115926798A (en) * 2022-12-09 2023-04-07 国能宝日希勒能源有限公司 Method for preparing damaged soil improvement matrix for alpine open-sky mining area by textile sludge and application method

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101407437A (en) * 2008-10-29 2009-04-15 南京农业大学 Method for inhibiting carbon dioxide released by mineralizing organic material
CN106495945A (en) * 2016-11-01 2017-03-15 湖南恒凯环保科技投资有限公司 A kind of method that utilization municipal sludge quickly prepares soil conditioner
CN106544037A (en) * 2016-10-21 2017-03-29 吴迪 A kind of preparation method of biological soil conditioner
CN107652117A (en) * 2017-09-28 2018-02-02 焦晓贝 A kind of soil improvement method in red Pi planting process
CN110204396A (en) * 2018-02-28 2019-09-06 郑百祥 A kind of wastes such as town and country cooperatively processing sludge are used for the technical solution of soil improvement
CN110484266A (en) * 2019-07-24 2019-11-22 清华大学 A kind of sludge base soil conditioner and preparation method thereof
CN111171830A (en) * 2019-12-18 2020-05-19 浙江慧丰环保科技有限公司 Passivator for soil heavy metal pollution treatment and preparation method thereof
CN112007660A (en) * 2020-09-17 2020-12-01 哈尔滨理工大学 Flower cluster-shaped FeS2Preparation method and application of @ C nitrogen fixation catalyst
CN112090928A (en) * 2020-09-05 2020-12-18 昆明理工大学 Method for soil stabilization and heavy metal stabilization of metal tailings
CN112876321A (en) * 2021-02-05 2021-06-01 河北地质大学 Sand soil nutrient laboratory improvement method and sand soil nutrient improver
CN112979394A (en) * 2021-05-17 2021-06-18 国能龙源环保有限公司 Method for preparing soil improvement matrix from solid waste of coal-fired power plant

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101407437A (en) * 2008-10-29 2009-04-15 南京农业大学 Method for inhibiting carbon dioxide released by mineralizing organic material
CN106544037A (en) * 2016-10-21 2017-03-29 吴迪 A kind of preparation method of biological soil conditioner
CN106495945A (en) * 2016-11-01 2017-03-15 湖南恒凯环保科技投资有限公司 A kind of method that utilization municipal sludge quickly prepares soil conditioner
CN107652117A (en) * 2017-09-28 2018-02-02 焦晓贝 A kind of soil improvement method in red Pi planting process
CN110204396A (en) * 2018-02-28 2019-09-06 郑百祥 A kind of wastes such as town and country cooperatively processing sludge are used for the technical solution of soil improvement
CN110484266A (en) * 2019-07-24 2019-11-22 清华大学 A kind of sludge base soil conditioner and preparation method thereof
CN111171830A (en) * 2019-12-18 2020-05-19 浙江慧丰环保科技有限公司 Passivator for soil heavy metal pollution treatment and preparation method thereof
CN112090928A (en) * 2020-09-05 2020-12-18 昆明理工大学 Method for soil stabilization and heavy metal stabilization of metal tailings
CN112007660A (en) * 2020-09-17 2020-12-01 哈尔滨理工大学 Flower cluster-shaped FeS2Preparation method and application of @ C nitrogen fixation catalyst
CN112876321A (en) * 2021-02-05 2021-06-01 河北地质大学 Sand soil nutrient laboratory improvement method and sand soil nutrient improver
CN112979394A (en) * 2021-05-17 2021-06-18 国能龙源环保有限公司 Method for preparing soil improvement matrix from solid waste of coal-fired power plant

Also Published As

Publication number Publication date
CN113736470A (en) 2021-12-03

Similar Documents

Publication Publication Date Title
Wang et al. Organic matter, a critical factor to immobilize phosphorus, copper, and zinc during composting under various initial C/N ratios
CN100369868C (en) Refined fertilizer produced from sludge and producing method thereof
CN101172899B (en) Sludge compost with bamboo charcoal as heavy metal fixation solution and method for producing the same
CN106995350A (en) The preparation method and sludge base charcoal slow-release phosphate fertilizer of sludge base charcoal slow-release phosphate fertilizer
CN104263379A (en) Acidic soil improving agent and application method thereof
CN104803773A (en) Traditional Chinese medicine residue biomass charcoal compound fertilizer and preparation method thereof
CN107382603A (en) A kind of biological material and its preparation method and application
CN106831260B (en) Wine grape garden soil conditioner and preparation method thereof
CN103523775A (en) Sludge treatment method and agricultural sludge biochar acquired by adopting same
AU2021100339A4 (en) A Method For Preparing Organic-Inorganic Compound Fertilizer By Utilizing Kitchen Waste
CN106986705A (en) A kind of composite fertilizer and preparation method thereof
CN102557768B (en) Circularly-deodorizing granulated conditioner and application thereof in sludge compost
CN111011160A (en) Nutrient soil for planting landscaping nursery stocks
CN113736470B (en) Method for preparing mining area soil conditioner from wet sludge in alpine and high-altitude areas
CN105001872A (en) Preparation method of soil conditioner taking phosphogypsum as raw material
CN104045388A (en) Use of charcoal as exogenous conditioning agent in sludge composting
CN117362124A (en) Method for preparing artificial black soil by decarbonizing and impurity removing coal gangue
CN112374948A (en) Composite modifier for acid soil and preparation method thereof
KR100275586B1 (en) Soil conditioner using natural mineral and method for producing the same
CN1266083C (en) Biological organic cotton dreg fertilizer and its production process
CN110790614A (en) Alkaline soil conditioner for phosphated residues and preparation method and application thereof
CN106673856A (en) Multifunctional full-nutritional fertilizer and preparation method thereof
CN105367330A (en) Long-acting carbon-reducing soil restoration fertilizer
CN107721683A (en) House refuse saline land greening tree planting soil conditioner
CN112358881A (en) Cassava residue biochar-based soil conditioner taking concentrated skim serum as raw material and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20220719

CF01 Termination of patent right due to non-payment of annual fee