Preparation process of soil remediation agent with multiple elements

Abstract

The invention provides a preparation process of a soil remediation agent with multiple elements, and relates to the technical field of soil remediation. The preparation process of the soil remediation agent with the multiple elements comprises the following steps: selecting and grinding raw materials, namely selecting natural mineral raw materials containing silicon, calcium, magnesium and potassium elements, and grinding the selected raw materials to obtain powder with the particle size within a certain range, and the particle size is generally controlled between 100 meshes and 300 meshes; the organic matter is added, the content of the organic matter in the soil can be increased, the ground mineral powder and the organic matter are mixed according to a certain proportion, and the mixing proportion needs to be determined according to the specific requirements of soil remediation and the characteristics of raw materials. By combining silicon, calcium, magnesium, potassium and other elements, the remediation agent can meet the requirements of multiple nutrient elements in soil at the same time, promote plant growth and improve the soil structure, and by adding organic matter such as humic acid, the organic matter content of the soil can be increased, the water and fertilizer retention capacity of the soil can be enhanced, and the physical and chemical properties of the soil can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of soil remediation, and in particular to a preparation process of a soil remediation agent containing multiple elements. Background Art

[0002] Since the advent of chemical agriculture, especially the large-scale production and use of fertilizers, agriculture has developed rapidly, meeting the supply of food and the demand for a large amount of materials. However, the efficiency of fertilizers produced by high energy consumption is very low during use. For example, plants can only absorb and utilize 20% to 30% of fertilizers applied in conventional ways, and 70% to 80% of fertilizers are wasted. For this reason, fertilizers are often used excessively to provide continuous nutrients for plant absorption and growth, which not only causes huge economic losses but also easily leads to serious pollution of the soil, atmosphere and water environment. Soil pollution has become a global environmental problem, especially in areas with rapid industrialization and urbanization. The accumulation of heavy metals and other harmful substances in the soil poses a serious threat to human health and ecosystems. Soil remediation technology is one of the key means to solve this problem. It reduces the concentration of harmful substances in the soil through physical, chemical or biological methods, and restores the ecological function of the soil and agricultural productivity.

[0003] Existing soil remediation technologies mainly include physical remediation, chemical remediation and biological remediation methods. Although physical remediation methods and soil washing and heat treatment have significant effects, they are costly and may damage the soil structure. Chemical remediation methods such as chemical stabilization and chemical leaching are easy to operate, but may introduce new chemicals and cause secondary pollution to the environment. Biological remediation methods use microorganisms or transform pollutants. Although they are environmentally friendly, they have a long remediation cycle and unstable effects. Therefore, technicians in this field provide a preparation process for a soil remediation agent with multiple elements to solve the problems raised in the above background technology. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a preparation process of a soil remediation agent with multiple elements, which solves the problems of the prior art remediation technology that it is easy to cause secondary pollution, has a long remediation cycle and unstable effect.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical scheme: a preparation process of a soil remediation agent having multiple elements, comprising:

[0008] Raw material selection and grinding: select natural mineral raw materials containing silicon, calcium, magnesium and potassium elements, grind the selected raw materials to obtain powder with a particle size within a certain range, and the particle size is generally controlled between 100 mesh and 300 mesh;

[0009] Add organic matter, such as humic acid, which can increase the organic matter content of the soil and enhance the soil's ability to retain water and fertilizer. Mix the ground mineral powder with the organic matter in a certain proportion. The mixing ratio needs to be determined according to the specific needs of soil remediation and the characteristics of the raw materials. Generally, the mass ratio of mineral powder to organic matter is 10:1 to 5:1.

[0010] Add microbial agents, select microbial agents that can promote the decomposition of organic matter and the stabilization of heavy metals, and add the microbial agents evenly to the mixture of mineral powder and organic matter. The amount of addition should be determined according to the activity of the microbial agents and the amount of soil remediation agent used;

[0011] Granulation or compression molding: the mixed repair agent is granulated by a granulator to form particles of uniform size. Granulation helps to improve the application convenience and storage stability of the repair agent. The mixture can also be pressed into sheets or blocks for easy transportation and application;

[0012] Quality testing: Conduct quality testing on the prepared soil remediation agent, including element content, pH value, organic matter content and microbial activity, to ensure that the remediation agent meets the standards and requirements for soil remediation;

[0013] Packaging and storage: Qualified soil remediation agents should be properly packaged to prevent moisture, contamination or reduced microbial activity, and stored in a dry, well-ventilated environment away from direct sunlight to maintain the stability and effectiveness of the remediation agent.

[0014] Preferably, the raw material selection and grinding comprises the following steps:

[0015] S1. Raw material selection: according to the needs of soil remediation, select natural mineral raw materials containing silicon, calcium, magnesium and potassium. Diatomaceous earth, limestone, dolomite and potassium feldspar can be used to ensure that the purity and element content of the selected raw materials meet the requirements of soil remediation agents;

[0016] S2. Pretreatment of raw materials, removal of impurities in the raw materials, and drying of the raw materials to remove moisture;

[0017] S3. Grinding process: grinding the raw materials to the desired particle size using a ball mill, hammer mill or other grinding equipment, determining the grinding time, grinding speed and size of the ball milling media to obtain a uniform particle size distribution;

[0018] S4. Particle size control: The particle size of the final product is controlled by screening or particle size analyzer, and the particle size is controlled between 100 mesh and 300 mesh to ensure that the repair agent has a good contact area with the soil.

[0019] Preferably, the adding of organic matter comprises the following steps:

[0020] S1. Selection of organic matter: Choose suitable sources of organic matter, such as humic acid, compost, animal manure and plant residues, and ensure that the selected sources of organic matter are stable, harmlessly treated, and meet the use standards of soil remediation agents;

[0021] S2. Pretreatment of organic matter: drying the organic matter to reduce the moisture content, prevent the material from agglomerating or becoming moldy during the mixing process, and crushing the organic matter to an appropriate particle size to facilitate uniform mixing with the mineral powder;

[0022] S3. Determine the mixing ratio. According to the goal of the soil remediation agent and the characteristics of the organic matter, determine the mixing ratio of the mineral powder and the organic matter, and control the mass ratio of the mineral powder to the organic matter to be between 10:1 and 5:1;

[0023] S4. Mixing process: put the ground mineral powder and the pre-treated organic matter into the mixing equipment. During the mixing process, ensure that the mixture is evenly mixed to avoid stratification or agglomeration;

[0024] S5. Control of mixing time: Control the mixing time to ensure that the mineral powder and organic matter are fully mixed. The mixing time depends on the type of mixing equipment and the mixing efficiency, and is generally 10 to 30 minutes.

[0025] Preferably, the adding of microbial agents comprises the following steps:

[0026] S1. Selection of microbial agents: Select appropriate microbial agents according to the goal of soil remediation. You can choose nitrogen-fixing bacteria, phosphate-solubilizing bacteria or potassium-solubilizing bacteria. These bacteria can promote the circulation of nutrients in the soil and the stabilization of heavy metals;

[0027] S2. Preparation of microbial agents: ensure that the selected microbial agents are highly active, of good purity, and in a suitable storage state. Before use, they should be activated according to the instructions of the agents. Appropriate amounts of nutrient solution or water may be added to increase the activity of the agents.

[0028] S3. Determination of the mixing ratio: the amount of addition is determined according to the total mass of the soil remediation agent and the recommended usage of the microbial agent. The mixing ratio needs to be determined according to the specific needs of soil remediation and the activity of the microbial agent, generally 0.1% to 1% of the total mass of the microbial agent and the soil remediation agent;

[0029] S4. During the mixing process, the activated microbial agent is evenly added to the mixed mineral powder and organic matter, and appropriate mixing equipment is used to ensure that the microbial agent and the soil remediation agent are evenly mixed to avoid local aggregation of the agent;

[0030] S5. Check the uniformity of the mixture to ensure that the microbial inoculant is evenly distributed throughout the mixture.

[0031] 6. Preferably, the granulation or compression molding comprises the following steps:

[0032] S1. Preparation before granulation: ensure that the humidity of the mixed soil remediation agent is moderate to facilitate granulation. If the humidity is insufficient, water can be added appropriately. If the humidity is too high, drying is required;

[0033] S2. Select the granulation method. According to the characteristics of the repair agent and the required particle size, select the appropriate granulation method, which can be extrusion granulation, drum granulation or spray drying granulation;

[0034] S3. Granulation process: for extrusion granulation, the mixed repair agent is placed in an extrusion granulator to form granules by extrusion and cutting; for drum granulation, the repair agent is placed in a drum granulator to form granules by the rotation of the drum and the friction of the material; for spray drying granulation, the repair agent solution or suspension is sprayed into a drying tower to form granules by rapid drying;

[0035] S4. Control of particle size: the particle size is controlled by adjusting the parameters of the granulator and the particles are graded using screening equipment to ensure that the particle size meets the requirements;

[0036] S5. Drying and curing. For wet granulation, the granules need to be dried to reduce the moisture content and improve the stability and storage of the granules. The drying temperature and time should be adjusted according to the characteristics of the repair agent and the particle size to avoid excessive drying that may lead to particle breakage.

[0037] S6. Quality inspection: conduct quality inspection on the granules after granulation, including indicators of particle size, shape, hardness and moisture content.

[0038] Preferably, the quality detection comprises the following steps:

[0039] S1. Sample preparation: randomly select representative samples from the soil remediation agent after granulation or compression molding to ensure the representativeness of the samples and avoid local deviations affecting the test results;

[0040] S2. Element content detection: use atomic absorption spectrometry to detect the content of silicon, calcium, magnesium and potassium in soil remediation agents to ensure the accuracy and repeatability of the detection method;

[0041] S3. pH value determination: Use a pH meter to determine the pH value of the soil remediation agent to evaluate its impact on soil acidity and alkalinity. According to standard operating procedures, the soil remediation agent is mixed with deionized water in a certain proportion, and the pH value of the supernatant is determined after standing;

[0042] S4. Organic matter content detection, using the burning method to determine the organic matter content in the soil remediation agent, ensuring that the sample is completely burned and accurately determining the loss of organic matter;

[0043] S5. Microbial activity test, using the plate count method to evaluate the activity of microbial agents to ensure that the test conditions meet the requirements for microbial growth;

[0044] S6. Heavy metal content detection: The soil remediation agent is tested for heavy metal content to ensure that it will not cause secondary pollution to the soil and the environment. Atomic absorption spectroscopy is used for detection.

[0045] Preferably, the packaging and storage comprises the following steps:

[0046] S1. Choose appropriate packaging materials. Choose appropriate packaging materials according to the physical and chemical properties of the soil remediation agent. Moisture-proof materials should be selected. For volatile components, packaging with good sealing properties should be selected;

[0047] S2. Determine the packaging specifications according to market demand, transportation conditions and convenience of use;

[0048] S3. Packaging should be carried out in a dust-free and dry environment to ensure hygiene during the packaging process and the purity of the product. During packaging, the packaging bag or container should be well sealed to avoid leakage;

[0049] S4. Labeling: A label should be placed on the package to indicate the product name, ingredients, net content, production date, expiration date, instructions for use, storage conditions and manufacturer information;

[0050] S5. Control of storage conditions. Soil remediation agents should be stored in a dry, well-ventilated, temperature-appropriate environment, avoiding direct sunlight and moisture.

[0051] (III) Beneficial effects

[0052] The present invention provides a preparation process of a soil remediation agent containing multiple elements, which has the following beneficial effects:

[0053] 1. In the present invention, by combining multiple elements such as silicon, calcium, magnesium, potassium, etc., the repair agent can simultaneously meet the needs of multiple nutrients in the soil, promote plant growth and improve soil structure, and add organic matter such as humic acid to increase the organic matter content of the soil, enhance the soil's ability to retain water and fertilizer, and improve the physical and chemical properties of the soil.

[0054] 2. In the present invention, by adding specific microbial agents, the decomposition of organic matter in the soil can be promoted, the soil fertility can be improved, and it is also helpful to stabilize heavy metals and reduce their bioavailability. The granulated or pressed repair agent is easy to apply and store, and the particle size can be controlled to ensure the uniform distribution and effective action of the repair agent in the soil.

[0055] 3. In the present invention, strict quality testing is performed to ensure that the element content, pH value, organic matter content, microbial activity, etc. of the repair agent meet the standards to ensure the repair effect. The soil repair agent prepared by this technical solution is suitable for various types of soil pollution repair, including heavy metal pollution, soil fertility decline and other problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] Embodiment 1:

[0059] like Figure 1 As shown, an embodiment of the present invention provides a preparation process of a soil remediation agent having multiple elements, comprising:

[0060] Raw material selection and grinding: select natural mineral raw materials containing silicon, calcium, magnesium and potassium elements, grind the selected raw materials to obtain powder with a particle size within a certain range, and the particle size is generally controlled between 100 mesh and 300 mesh;

[0061] Add organic matter, such as humic acid, which can increase the organic matter content of the soil and enhance the soil's ability to retain water and fertilizer. Mix the ground mineral powder with the organic matter in a certain proportion. The mixing ratio needs to be determined according to the specific needs of soil remediation and the characteristics of the raw materials. Generally, the mass ratio of mineral powder to organic matter is 10:1 to 5:1.

[0062] Add microbial agents, select microbial agents that can promote the decomposition of organic matter and the stabilization of heavy metals, and add the microbial agents evenly to the mixture of mineral powder and organic matter. The amount of addition should be determined according to the activity of the microbial agents and the amount of soil remediation agent used;

[0063] Granulation or compression molding: the mixed repair agent is granulated by a granulator to form particles of uniform size. Granulation helps to improve the application convenience and storage stability of the repair agent. The mixture can also be pressed into sheets or blocks for easy transportation and application;

[0064] Quality testing: Conduct quality testing on the prepared soil remediation agent, including element content, pH value, organic matter content and microbial activity, to ensure that the remediation agent meets the standards and requirements for soil remediation;

[0065] Packaging and storage: Qualified soil remediation agents should be properly packaged to prevent moisture, contamination or reduced microbial activity, and stored in a dry, well-ventilated environment away from direct sunlight to maintain the stability and effectiveness of the remediation agent.

[0066] Raw material selection and grinding include the following steps:

[0067] S1. Raw material selection: according to the needs of soil remediation, select natural mineral raw materials containing silicon, calcium, magnesium and potassium. Diatomaceous earth, limestone, dolomite and potassium feldspar can be used to ensure that the purity and element content of the selected raw materials meet the requirements of soil remediation agents;

[0068] S2. Pretreatment of raw materials, removal of impurities in the raw materials, and drying of the raw materials to remove moisture;

[0069] S3. Grinding process: grinding the raw materials to the desired particle size using a ball mill, hammer mill or other grinding equipment, determining the grinding time, grinding speed and size of the ball milling media to obtain a uniform particle size distribution;

[0070] S4. Particle size control: The particle size of the final product is controlled by screening or particle size analyzer, and the particle size is controlled between 100 mesh and 300 mesh to ensure that the repair agent has a good contact area with the soil.

[0071] Adding organic matter involves the following steps:

[0072] S1. Selection of organic matter: Choose suitable sources of organic matter, such as humic acid, compost, animal manure and plant residues, and ensure that the selected sources of organic matter are stable, harmlessly treated, and meet the use standards of soil remediation agents;

[0073] S2. Pretreatment of organic matter: drying the organic matter to reduce the moisture content, prevent the material from agglomerating or becoming moldy during the mixing process, and crushing the organic matter to an appropriate particle size to facilitate uniform mixing with the mineral powder;

[0074] S3. Determine the mixing ratio. According to the goal of the soil remediation agent and the characteristics of the organic matter, determine the mixing ratio of the mineral powder and the organic matter, and control the mass ratio of the mineral powder to the organic matter to be between 10:1 and 5:1;

[0075] S4. Mixing process: put the ground mineral powder and the pre-treated organic matter into the mixing equipment. During the mixing process, ensure that the mixture is evenly mixed to avoid stratification or agglomeration;

[0076] S5. Control of mixing time: Control the mixing time to ensure that the mineral powder and organic matter are fully mixed. The mixing time depends on the type of mixing equipment and the mixing efficiency, and is generally 10 to 30 minutes.

[0077] Adding microbial agents includes the following steps:

[0078] S1. Selection of microbial agents: Select appropriate microbial agents according to the goal of soil remediation. You can choose nitrogen-fixing bacteria, phosphate-solubilizing bacteria or potassium-solubilizing bacteria. These bacteria can promote the circulation of nutrients in the soil and the stabilization of heavy metals;

[0079] S2. Preparation of microbial agents: ensure that the selected microbial agents are highly active, of good purity, and in a suitable storage state. Before use, they should be activated according to the instructions of the agents. Appropriate amounts of nutrient solution or water may be added to increase the activity of the agents.

[0080] S3. Determination of the mixing ratio: the amount of addition is determined according to the total mass of the soil remediation agent and the recommended usage of the microbial agent. The mixing ratio needs to be determined according to the specific needs of soil remediation and the activity of the microbial agent, generally 0.1% to 1% of the total mass of the microbial agent and the soil remediation agent;

[0081] S4. During the mixing process, the activated microbial agent is evenly added to the mixed mineral powder and organic matter, and appropriate mixing equipment is used to ensure that the microbial agent and the soil remediation agent are evenly mixed to avoid local aggregation of the agent;

[0082] S5. Check the uniformity of the mixture to ensure that the microbial inoculant is evenly distributed throughout the mixture.

[0083] 7. Granulation or compression molding includes the following steps:

[0084] S1. Preparation before granulation: ensure that the humidity of the mixed soil remediation agent is moderate to facilitate granulation. If the humidity is insufficient, water can be added appropriately. If the humidity is too high, drying is required;

[0085] S2. Select the granulation method. According to the characteristics of the repair agent and the required particle size, select the appropriate granulation method, which can be extrusion granulation, drum granulation or spray drying granulation;

[0086] S3. Granulation process: for extrusion granulation, the mixed repair agent is placed in an extrusion granulator to form granules by extrusion and cutting; for drum granulation, the repair agent is placed in a drum granulator to form granules by the rotation of the drum and the friction of the material; for spray drying granulation, the repair agent solution or suspension is sprayed into a drying tower to form granules by rapid drying;

[0087] S4. Control of particle size: the particle size is controlled by adjusting the parameters of the granulator and the particles are graded using screening equipment to ensure that the particle size meets the requirements;

[0088] S5. Drying and curing. For wet granulation, the granules need to be dried to reduce the moisture content and improve the stability and storage of the granules. The drying temperature and time should be adjusted according to the characteristics of the repair agent and the particle size to avoid excessive drying that may lead to particle breakage.

[0089] S6. Quality inspection: conduct quality inspection on the granules after granulation, including indicators of particle size, shape, hardness and moisture content.

[0090] Quality testing includes the following steps:

[0091] S1. Sample preparation: randomly select representative samples from the soil remediation agent after granulation or compression molding to ensure the representativeness of the samples and avoid local deviations affecting the test results;

[0092] S2. Element content detection: use atomic absorption spectrometry to detect the content of silicon, calcium, magnesium and potassium in soil remediation agents to ensure the accuracy and repeatability of the detection method;

[0093] S3. pH value determination: Use a pH meter to determine the pH value of the soil remediation agent to evaluate its impact on soil acidity and alkalinity. According to standard operating procedures, the soil remediation agent is mixed with deionized water in a certain proportion, and the pH value of the supernatant is determined after standing;

[0094] S4. Organic matter content detection, using the burning method to determine the organic matter content in the soil remediation agent, ensuring that the sample is completely burned and accurately determining the loss of organic matter;

[0095] S5. Microbial activity test, using the plate count method to evaluate the activity of microbial agents to ensure that the test conditions meet the requirements for microbial growth;

[0096] S6. Heavy metal content detection: The soil remediation agent is tested for heavy metal content to ensure that it will not cause secondary pollution to the soil and the environment. Atomic absorption spectroscopy is used for detection.

[0097] Packaging and storage include the following steps:

[0098] S1. Choose appropriate packaging materials. Choose appropriate packaging materials according to the physical and chemical properties of the soil remediation agent. Moisture-proof materials should be selected. For volatile components, packaging with good sealing properties should be selected;

[0099] S2. Determine the packaging specifications according to market demand, transportation conditions and convenience of use;

[0100] S3. Packaging should be carried out in a dust-free and dry environment to ensure hygiene during the packaging process and the purity of the product. During packaging, the packaging bag or container should be well sealed to avoid leakage;

[0101] S4. Labeling: A label should be placed on the package to indicate the product name, ingredients, net content, production date, expiration date, instructions for use, storage conditions and manufacturer information;

[0102] S5. Control of storage conditions. Soil remediation agents should be stored in a dry, well-ventilated, temperature-appropriate environment, avoiding direct sunlight and moisture.

[0103] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A preparation process of a soil remediation agent having multiple elements, characterized in that: include: Raw material selection and grinding: select natural mineral raw materials containing silicon, calcium, magnesium and potassium elements, grind the selected raw materials to obtain powder with a particle size within a certain range, and the particle size is generally controlled between 100 mesh and 300 mesh; Add organic matter, such as humic acid, which can increase the organic matter content of the soil and enhance the soil's ability to retain water and fertilizer. Mix the ground mineral powder with the organic matter in a certain proportion. The mixing ratio needs to be determined according to the specific needs of soil remediation and the characteristics of the raw materials. Generally, the mass ratio of mineral powder to organic matter is 10:1 to 5:

1. Add microbial agents, select microbial agents that can promote the decomposition of organic matter and the stabilization of heavy metals, and add the microbial agents evenly to the mixture of mineral powder and organic matter. The amount of addition should be determined according to the activity of the microbial agents and the amount of soil remediation agent used; Granulation or compression molding: the mixed repair agent is granulated by a granulator to form particles of uniform size. Granulation helps to improve the application convenience and storage stability of the repair agent. The mixture can also be pressed into sheets or blocks for easy transportation and application; Quality testing: Conduct quality testing on the prepared soil remediation agent, including element content, pH value, organic matter content and microbial activity, to ensure that the remediation agent meets the standards and requirements for soil remediation; Packaging and storage: Qualified soil remediation agents should be properly packaged to prevent moisture, contamination or reduced microbial activity, and stored in a dry, well-ventilated environment away from direct sunlight to maintain the stability and effectiveness of the remediation agent.

2. The preparation process of a soil remediation agent having multiple elements according to claim 1, characterized in that: The raw material selection and grinding comprises the following steps: S1. Raw material selection: according to the needs of soil remediation, select natural mineral raw materials containing silicon, calcium, magnesium and potassium. Diatomaceous earth, limestone, dolomite and potassium feldspar can be used to ensure that the purity and element content of the selected raw materials meet the requirements of soil remediation agents; S2. Pretreatment of raw materials, removal of impurities in the raw materials, and drying of the raw materials to remove moisture; S3. Grinding process: grinding the raw materials to the desired particle size using a ball mill, hammer mill or other grinding equipment, determining the grinding time, grinding speed and size of the ball milling media to obtain a uniform particle size distribution; S4. Particle size control: The particle size of the final product is controlled by screening or particle size analyzer, and the particle size is controlled between 100 mesh and 300 mesh to ensure that the repair agent has a good contact area with the soil.

3. The preparation process of a soil remediation agent having multiple elements according to claim 1, characterized in that: The adding of organic matter comprises the following steps: S1. Selection of organic matter: Choose suitable sources of organic matter, such as humic acid, compost, animal manure and plant residues, and ensure that the selected sources of organic matter are stable, harmlessly treated, and meet the use standards of soil remediation agents; S2. Pretreatment of organic matter: drying the organic matter to reduce the moisture content, prevent the material from agglomerating or becoming moldy during the mixing process, and crushing the organic matter to an appropriate particle size to facilitate uniform mixing with the mineral powder; S3. Determine the mixing ratio. According to the goal of the soil remediation agent and the characteristics of the organic matter, determine the mixing ratio of the mineral powder and the organic matter, and control the mass ratio of the mineral powder to the organic matter to be between 10:1 and 5:1; S4. Mixing process: put the ground mineral powder and the pre-treated organic matter into the mixing equipment. During the mixing process, ensure that the mixture is evenly mixed to avoid stratification or agglomeration; S5. Control of mixing time: Control the mixing time to ensure that the mineral powder and organic matter are fully mixed. The mixing time depends on the type of mixing equipment and the mixing efficiency, and is generally 10 to 30 minutes.

4. The preparation process of a soil remediation agent having multiple elements according to claim 1, characterized in that: The adding of microbial agents comprises the following steps: S1. Selection of microbial agents: Select appropriate microbial agents according to the goal of soil remediation. You can choose nitrogen-fixing bacteria, phosphate-solubilizing bacteria or potassium-solubilizing bacteria. These bacteria can promote the circulation of nutrients in the soil and the stabilization of heavy metals; S2. Preparation of microbial agents: ensure that the selected microbial agents are highly active, of good purity, and in a suitable storage state. Before use, they should be activated according to the instructions of the agents. Appropriate amounts of nutrient solution or water may be added to increase the activity of the agents. S3. Determination of the mixing ratio: the amount of addition is determined according to the total mass of the soil remediation agent and the recommended usage of the microbial agent. The mixing ratio needs to be determined according to the specific needs of soil remediation and the activity of the microbial agent, generally 0.1% to 1% of the total mass of the microbial agent and the soil remediation agent; S4. During the mixing process, the activated microbial agent is evenly added to the mixed mineral powder and organic matter, and appropriate mixing equipment is used to ensure that the microbial agent and the soil remediation agent are evenly mixed to avoid local aggregation of the agent; S5. Check the uniformity of the mixture to ensure that the microbial inoculant is evenly distributed throughout the mixture.

5. The preparation process of a soil remediation agent having multiple elements according to claim 1, characterized in that: The granulation or compression molding comprises the following steps: S1. Preparation before granulation: ensure that the humidity of the mixed soil remediation agent is moderate to facilitate granulation. If the humidity is insufficient, water can be added appropriately. If the humidity is too high, drying is required; S2. Select the granulation method. According to the characteristics of the repair agent and the required particle size, select the appropriate granulation method, which can be extrusion granulation, drum granulation or spray drying granulation; S3. Granulation process: for extrusion granulation, the mixed repair agent is placed in an extrusion granulator to form granules by extrusion and cutting; for drum granulation, the repair agent is placed in a drum granulator to form granules by the rotation of the drum and the friction of the material; for spray drying granulation, the repair agent solution or suspension is sprayed into a drying tower to form granules by rapid drying; S4. Control of particle size: the particle size is controlled by adjusting the parameters of the granulator and the particles are graded using screening equipment to ensure that the particle size meets the requirements; S5. Drying and curing. For wet granulation, the granules need to be dried to reduce the moisture content and improve the stability and storage of the granules. The drying temperature and time should be adjusted according to the characteristics of the repair agent and the particle size to avoid excessive drying that may lead to particle breakage. S6. Quality inspection: conduct quality inspection on the granules after granulation, including indicators of particle size, shape, hardness and moisture content.

6. The preparation process of a soil remediation agent having multiple elements according to claim 1, characterized in that: The quality inspection comprises the following steps: S1. Sample preparation: randomly select representative samples from the soil remediation agent after granulation or compression molding to ensure the representativeness of the samples and avoid local deviations affecting the test results; S2. Element content detection: use atomic absorption spectrometry to detect the content of silicon, calcium, magnesium and potassium in soil remediation agents to ensure the accuracy and repeatability of the detection method; S3. pH value determination: Use a pH meter to determine the pH value of the soil remediation agent to evaluate its impact on soil acidity and alkalinity. According to standard operating procedures, the soil remediation agent is mixed with deionized water in a certain proportion, and the pH value of the supernatant is determined after standing; S4. Organic matter content detection, using the burning method to determine the organic matter content in the soil remediation agent, ensuring that the sample is completely burned and accurately determining the loss of organic matter; S5. Microbial activity test, using the plate count method to evaluate the activity of microbial agents to ensure that the test conditions meet the requirements for microbial growth; S6. Heavy metal content detection: The soil remediation agent is tested for heavy metal content to ensure that it will not cause secondary pollution to the soil and the environment. Atomic absorption spectroscopy is used for detection.

7. The preparation process of a soil remediation agent having multiple elements according to claim 1, characterized in that: The packaging and storage comprises the following steps: S1. Choose appropriate packaging materials. Choose appropriate packaging materials according to the physical and chemical properties of the soil remediation agent. Moisture-proof materials should be selected. For volatile components, packaging with good sealing properties should be selected; S2. Determine the packaging specifications according to market demand, transportation conditions and convenience of use; S3. Packaging should be carried out in a dust-free and dry environment to ensure hygiene during the packaging process and the purity of the product. During packaging, the packaging bag or container should be well sealed to avoid leakage; S4. Labelling: Affix a label to the package indicating the product name, ingredients, net content, production date, expiry date, instructions for use, storage conditions and manufacturer information; S5. Control of storage conditions. Soil remediation agents should be stored in a dry, well-ventilated, temperature-appropriate environment, avoiding direct sunlight and moisture.

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