CN113861998B - Method for preparing saline-alkali soil conditioner by fermenting and adjusting phosphogypsum - Google Patents
Method for preparing saline-alkali soil conditioner by fermenting and adjusting phosphogypsum Download PDFInfo
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- CN113861998B CN113861998B CN202111294239.0A CN202111294239A CN113861998B CN 113861998 B CN113861998 B CN 113861998B CN 202111294239 A CN202111294239 A CN 202111294239A CN 113861998 B CN113861998 B CN 113861998B
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- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title claims abstract description 55
- 239000003516 soil conditioner Substances 0.000 title claims abstract description 36
- 239000003513 alkali Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 26
- 241000287828 Gallus gallus Species 0.000 claims abstract description 19
- 210000003608 fece Anatomy 0.000 claims abstract description 19
- 239000010871 livestock manure Substances 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000002689 soil Substances 0.000 claims description 39
- 238000002156 mixing Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 3
- 238000000643 oven drying Methods 0.000 claims 1
- 238000000855 fermentation Methods 0.000 abstract description 7
- 230000004151 fermentation Effects 0.000 abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011574 phosphorus Substances 0.000 abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052731 fluorine Inorganic materials 0.000 abstract description 3
- 239000011737 fluorine Substances 0.000 abstract description 3
- 235000015097 nutrients Nutrition 0.000 abstract description 3
- 235000021049 nutrient content Nutrition 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 239000004566 building material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004129 EU approved improving agent Substances 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
- C05D3/02—Calcareous fertilisers from limestone, calcium carbonate, calcium hydrate, slaked lime, calcium oxide, waste calcium products
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES 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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2101/00—Agricultural use
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pest Control & Pesticides (AREA)
- Environmental Sciences (AREA)
- Molecular Biology (AREA)
- Biotechnology (AREA)
- Biochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Microbiology (AREA)
- Health & Medical Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
The invention relates to the technical field of solid waste recycling, in particular to a method for preparing a saline-alkali soil conditioner by fermenting and adjusting phosphogypsum, which comprises the steps of adjusting the water content by using phosphogypsum, grinding, fully exposing a plurality of nutrients such as fluorine, phosphorus and the like, drying chicken manure, stabilizing the nutrient content in the chicken manure, ensuring that the water content of the abrasive can be absorbed and adjusted after the chicken manure is added into the abrasive, meeting the fermentation treatment requirement, and sealing and fermenting by using a bagging bag.
Description
Technical Field
The invention relates to the technical field of solid waste resource utilization, in particular to a method for preparing a saline-alkali soil conditioner by fermenting and adjusting phosphogypsum.
Background
Phosphogypsum is industrial waste residue discharged from wet-process phosphoric acid process, and is generally used for producing 1 ton of wet-process phosphoric acid (P 2 O 5 Meter), 4 to 4.5 tons of phosphogypsum are produced. The piling up of a large amount of phosphogypsum not only easily causes environmental pollution and wastes land resources, but also causes the phosphorus chemical industry enterprises because the phosphogypsum is difficult to be recycledThe burden is heavier and the economic benefit is poorer.
At present, the comprehensive utilization of phosphogypsum is studied initially, and corresponding effects are achieved, so that the phosphogypsum is widely applied to building materials, chemical industry and agriculture, for example: in the aspect of building materials, phosphogypsum is used as a raw material to produce building blocks, insulating bricks, cement and the like; in the aspect of chemical industry, phosphogypsum is used as a raw material to produce sulfuric acid, paper making and the like; in agriculture, phosphogypsum is used as a raw material to prepare a fertilizer field agent, a soil conditioner and the like. The method is characterized in that the raw materials such as pyrite, natural gypsum and the like which are needed to be adopted in the aspects of building materials, chemical industry and the like are easy to obtain, and compared with phosphogypsum, the product phase is more excellent, the price is low, so that the application amount of the phosphogypsum in the building materials and chemical industry fields is not obvious; meanwhile, the phosphogypsum is used for agriculture, so that a favorable effect is obtained, and the application of the phosphogypsum in agriculture is quickened. However, phosphogypsum still faces a number of challenges in agriculture applications, such as: phosphogypsum contains a small amount of pollutants such as fluorine, heavy metal and the like, so that after the phosphogypsum is applied to agriculture, the phosphogypsum enters a soil environment along with rain wash, and the soil is polluted.
In view of this, the research team focused on many defects of phosphogypsum in agricultural application, developed phosphogypsum for comprehensive land remediation and ecological restoration technology and application demonstration (Qian-family He-Ji-He-Ji [2018] 4011) stand research, and determined the stand research direction (as shown in fig. 1): (1) phosphogypsum is used as a raw material, high-temperature harmless treatment is carried out on the phosphogypsum, and the consumption of the phosphogypsum is increased, so that a soil conditioner is prepared; (2) phosphogypsum is used as a raw material to be added to prepare an agricultural fertilizer; (3) phosphogypsum is used as a raw material, and an improver is prepared for saline-alkali soil; (4) phosphogypsum is used as a raw material, and a recrystallization method is used for modification to prepare the soil conditioner.
Based on the above-mentioned research direction, the research is responsible for project group member Tian Juan, and focuses on fermenting phosphogypsum as a raw material to prepare an improver suitable for improving saline-alkali soil, and searching and analyzing technical progress in the aspect of fermenting phosphogypsum as a raw material to prepare an improver for saline-alkali soil in the prior art, it can be known that: the preparation of saline-alkali soil improving agents by fermenting phosphogypsum or mixing phosphogypsum with a fermentation material has appeared, for example: patent application No. 201310262124.2 discloses a soil conditioner capable of effectively reducing the pH of saline-alkali soil, loosening the soil, improving the soil structure and ventilation state, drying and pulverizing phosphogypsum into gypsum powder; drying and crushing the waste fungus bag and the vinasse, uniformly mixing and fermenting, turning over and fermenting for 10-30 days, adding phosphogypsum, uniformly mixing, adding water for adjusting, piling, fermenting and drying to obtain the soil conditioner, which has the effects of improving the alkaline environment of the soil, relieving the limitation of the soil on the growth of crops and promoting the growth of the crops. The method can use a large amount of phosphogypsum to accelerate the absorption of phosphogypsum, but the improvement performance of the saline-alkali soil is still poor, and the improvement effect is still unsatisfactory.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a method for preparing the saline-alkali soil conditioner by fermenting and regulating phosphogypsum, which simplifies the process of using phosphogypsum for preparing the saline-alkali soil conditioner, reduces the preparation cost of the conditioner, improves the soil improvement effect of the conditioner on the saline-alkali soil, enlarges the application range of the conditioner, increases the consumption of phosphogypsum, accelerates the storage amount of phosphogypsum, and lightens the burden of a phosphorus chemical enterprise.
The method is realized by the following technical scheme:
the invention provides a method for preparing a saline-alkali soil conditioner by fermenting and adjusting phosphogypsum, which comprises the following steps:
(1) Adding phosphogypsum into a grinder, adjusting the water content, and grinding to prepare an abrasive;
(2) Drying chicken manure to constant weight;
(3) Stirring chicken manure and abrasive according to the mass ratio of 4:1-2, uniformly mixing, bagging, sealing, placing in natural environment, fermenting for at least 30 days, and drying to obtain the final product.
In order to supplement organic matters and water to phosphogypsum, preferably, in the step (1), biogas slurry is adopted to adjust the water content, and the liquid-solid mass ratio of the biogas slurry to the phosphogypsum is 1:0.5-1.
In order to ensure excellent performance of the fermentation preparation soil conditioner, preferably, the step (1) further comprises sieving the soil conditioner with a 100-mesh sieve after grinding.
In order to avoid the defects of damage to organic matters caused by overhigh temperature, longer drying time, long process period and the like caused by overhigh temperature, the step (2) is preferably to adopt constant temperature drying at 60 ℃ to constant weight. More preferably, in the step (3), the drying is carried out at a temperature of 60 ℃ and a stirring speed of 100r/min until the weight is constant.
The second purpose of the invention is to provide the saline-alkali soil conditioner prepared by the method.
The invention further provides application of the saline-alkali soil conditioner prepared by the method in saline-alkali soil improvement, and when the saline-alkali soil conditioner is used, the saline-alkali soil conditioner and the saline-alkali soil are uniformly mixed according to the mass ratio of 1:30.
Compared with the prior art, the invention has the technical effects that:
(1) the phosphogypsum is utilized to adjust the water content and grind, so that a plurality of nutrients such as fluorine, phosphorus and the like are fully exposed, then chicken manure is utilized to dry, the nutrient content in the chicken manure is stabilized, the water content of the abrasive can be absorbed and regulated after the chicken manure is ensured to be added into the abrasive, the fermentation treatment requirement is met, and then the bagging and sealing fermentation treatment is utilized, so that the salt content of the soil can be reduced after the soil conditioner is applied to the saline-alkali soil, the pH value is reduced, the influence of the saline-alkali soil on crops is relieved, and the normal growth of the crops is promoted.
(2) The invention has simple process flow, is easy to operate and control, is easy to implement in industrialization, adopts anaerobic fermentation treatment after bagging and sealing by utilizing microorganisms in chicken manure and biogas slurry, ensures that the soil conditioner can supplement nutrients to the saline-alkali soil, improves the soil structure of the saline-alkali soil, reduces the salt content, reduces the pH value, relieves the influence on the growth of crops, and is beneficial to ensuring the normal growth of the crops.
Drawings
FIG. 1 is a schematic diagram of the overall direction of the project under which the present invention was developed.
FIG. 2 is a schematic diagram of the process flow of the invention.
Detailed Description
The technical solution of the present invention is further defined below with reference to the accompanying drawings and specific embodiments, but the scope of the claims is not limited to the description.
Example 1
Grinding phosphogypsum in a grinder according to the mass ratio of liquid to solid of 1:0.5 to prepare grinding materials (sieving with a 100-mesh sieve), and drying chicken manure at a constant temperature of 60 ℃ to constant weight to obtain dry chicken manure; uniformly mixing dry chicken manure and abrasive according to the mass ratio of 2:1, bagging by adopting a plastic bag, sealing the bag mouth of the plastic bag, placing the mixture in a natural environment for fermentation for 30 days, and drying the mixture to constant weight by adopting a constant temperature of 60 ℃ and a stirring speed of 100 r/min.
Example 2
As shown in fig. 2, water added in the preparation of the abrasive was replaced with biogas slurry separated from the biogas digester, and the other materials were prepared in the same manner as in example 1.
Example 3
As shown in fig. 2, when the abrasive is prepared, the mass ratio of liquid to solid is 1:1, the dry chicken manure and the abrasive are mixed and ground, the mass ratio of the dry chicken manure to the abrasive is 4:1, and other steps are prepared according to the preparation method of the embodiment 2, so that the abrasive is obtained.
Comparative example 1: phosphogypsum is directly used as a soil conditioner.
Comparative example 2: the dry chicken manure prepared in example 1 was directly used as a soil conditioner.
In order to fully verify the effect of the soil conditioner on the adaptability improvement of the saline-alkali soil, the research team carries out soil alkaline pollution improvement test in a laboratory, and the specific test process and the result are as follows:
salt isolation test:
test time: 6 months to 10 months in 2020;
test site: laboratory of Guizhou chemical industry institute;
test soil: collecting vegetable fields beside an office building of a Guizhou chemical institute;
the test method comprises the following steps: taking a plastic pipe with the diameter of 4cm and the length of 20cm, plugging one end of the plastic pipe, firstly pouring soil with the depth of 1cm from the other end of the plastic pipe, then pouring soil conditioner with the depth of 3cm into the plastic pipe, then pouring the soil to a position 1cm away from the pipe orifice of the plastic pipe, and then opening one end (bottom end) plugged by the plastic pipe; the soil conditioner used for filling was the soil conditioner obtained in examples 1 to 3, comparative example 1 and comparative example 2, respectively.
Taking a plastic basin with the diameter of 20cm and the depth of 30cm, erecting a plurality of fixing frames for fixing a plastic pipe on a basin mouth of the plastic basin, vertically installing the plastic pipe on the fixing frames, enabling the distance between the bottom end of the plastic pipe and the bottom of the plastic basin to be 1cm, injecting sodium bicarbonate solution (the concentration is 0.2 mol/L) into the plastic basin, enabling the depth of the sodium bicarbonate solution to reach 20cm, pouring out soil above the depth of 1cm at the upper end of a soil conditioner layer after the treatment time reaches 24 hours, adopting deionized water with the weight of 2 times, stirring for 10 minutes at 1000r/min, filtering out solid matters, and taking solution to analyze the pH value and the conductivity, wherein the result is shown in Table 1.
Ion exchange test:
stirring and mixing the soil conditioner and soil according to the mass ratio of 1:30 to obtain mixed soil; the soil filling operation in the plastic pipe was performed according to the salt isolation test, the soil was filled into the plastic pipe 1cm deep, and then the mixed soil was filled to a position 1cm away from the pipe orifice, and the other operations were performed according to the salt isolation test operation, and the pH and conductivity of the solution were measured, and the results are shown in table 1.
In the test process, a researcher uses a treatment group without adding any soil conditioner as a blank group, and the treatment and detection of the blank group prove that: the pH was 9.52 and the conductivity (EC) was 1095. Mu.s/cm.
TABLE 1
As can be seen from the data in Table 1, the soil conditioner provided by the invention can effectively reduce the pH and conductivity of soil, reduce the salinization degree of soil and reduce the influence of saline-alkali soil on crops; the invention can supplement organic components to the saline-alkali soil to be improved after supplementing the organic components such as chicken manure, thereby achieving the purpose of promoting the growth of crops. The person skilled in the art may refer to the prior art or the common general knowledge known to the person skilled in the art for creating other less than perfect matters in the present invention, and the conventional technical means may be implemented.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. A method for preparing a saline-alkali soil conditioner by fermenting and adjusting phosphogypsum is characterized by comprising the following steps:
(1) Adding phosphogypsum into a grinding machine, adjusting the water content by adopting biogas slurry, and grinding to prepare an abrasive; the liquid-solid mass ratio of the biogas slurry to the phosphogypsum is 1:0.5-1;
(2) Oven drying chicken manure at a constant temperature of 60 ℃ to constant weight;
(3) Stirring chicken manure and abrasive according to a mass ratio of 2:1, uniformly mixing, bagging, sealing, placing in a natural environment, fermenting for at least 30 days, and drying to obtain the chicken manure.
2. The method for preparing a saline-alkali soil conditioner by fermenting and adjusting phosphogypsum according to claim 1, wherein the step (1) further comprises sieving the phosphogypsum with a 100-mesh sieve after grinding.
3. The method for preparing a saline-alkali soil conditioner by fermenting and adjusting phosphogypsum according to claim 1, wherein in the step (3), the drying is carried out at the temperature of 60 ℃ at the stirring speed of 100r/min until the weight is constant.
4. A saline-alkali soil conditioner prepared by the method of any one of claims 1 to 3.
5. Use of the saline-alkali soil conditioner prepared by the method according to any one of claims 1-3 in saline-alkali soil improvement, wherein the saline-alkali soil conditioner and the saline-alkali soil are uniformly mixed according to a mass ratio of 1:30 when in use.
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|---|---|---|---|---|
| CN101775293A (en) * | 2009-09-27 | 2010-07-14 | 南京信息工程大学 | Biological soil conditioner containing phosphogypsum and application thereof |
| CN103343011A (en) * | 2013-06-27 | 2013-10-09 | 昆明理工大学 | Compounding method and application of soil conditioner |
| CN105062497A (en) * | 2015-08-28 | 2015-11-18 | 贵州开磷集团股份有限公司 | Ameliorant special for pepper planting in saline alkali soil and preparation method and application thereof |
| CN105087015A (en) * | 2015-08-28 | 2015-11-25 | 贵州开磷集团股份有限公司 | Special conditioner for saline-alkali soil white hyacinth bean planting and preparation method and application thereof |
| CN106929034A (en) * | 2017-04-20 | 2017-07-07 | 中国科学院生态环境研究中心 | A kind of solid waste prepares the new technology of saline-alkali soil conditioner |
-
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- 2021-11-03 CN CN202111294239.0A patent/CN113861998B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775293A (en) * | 2009-09-27 | 2010-07-14 | 南京信息工程大学 | Biological soil conditioner containing phosphogypsum and application thereof |
| CN103343011A (en) * | 2013-06-27 | 2013-10-09 | 昆明理工大学 | Compounding method and application of soil conditioner |
| CN105062497A (en) * | 2015-08-28 | 2015-11-18 | 贵州开磷集团股份有限公司 | Ameliorant special for pepper planting in saline alkali soil and preparation method and application thereof |
| CN105087015A (en) * | 2015-08-28 | 2015-11-25 | 贵州开磷集团股份有限公司 | Special conditioner for saline-alkali soil white hyacinth bean planting and preparation method and application thereof |
| CN106929034A (en) * | 2017-04-20 | 2017-07-07 | 中国科学院生态环境研究中心 | A kind of solid waste prepares the new technology of saline-alkali soil conditioner |
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|---|---|
| CN113861998A (en) | 2021-12-31 |
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