CN113307698A - Granulation method of microbial fertilizer - Google Patents
Granulation method of microbial fertilizer Download PDFInfo
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- CN113307698A CN113307698A CN202110683230.2A CN202110683230A CN113307698A CN 113307698 A CN113307698 A CN 113307698A CN 202110683230 A CN202110683230 A CN 202110683230A CN 113307698 A CN113307698 A CN 113307698A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F11/00—Other organic fertilisers
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- 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
- C05F17/20—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation using specific microorganisms or substances, e.g. enzymes, for activating or stimulating the treatment
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- 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
- C05F17/70—Controlling the treatment in response to process parameters
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F5/00—Fertilisers from distillery wastes, molasses, vinasses, sugar plant or similar wastes or residues, e.g. from waste originating from industrial processing of raw material of agricultural origin or derived products thereof
- C05F5/002—Solid waste from mechanical processing of material, e.g. seed coats, olive pits, almond shells, fruit residue, rice hulls
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- 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
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
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- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
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- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
- C05G5/37—Layered or coated, e.g. dust-preventing coatings layered or coated with a polymer
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00758—Uses not provided for elsewhere in C04B2111/00 for agri-, sylvi- or piscicultural or cattle-breeding applications
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- 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
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Abstract
The invention discloses a granulation method of a microbial fertilizer, which comprises the following steps: carrying out solid fermentation on an organic material containing microbial bacteria to obtain a bacterial fertilizer, and then carrying out molding granulation on the bacterial fertilizer to obtain bacterial fertilizer particles; carrying out surface mechanical activation treatment on the bacterial manure particles; respectively preparing modified starch with the particle size of 0.01-5 mu m and aerated concrete powder with the particle size of 50-200 mu m, mixing the modified starch and the aerated concrete powder, adding a dispersing solvent, and stirring to obtain coating slurry; and (4) coating the bacterial fertilizer particles by using the coating slurry, and drying to obtain the microbial fertilizer. This biological bacterial fertilizer carries out activation treatment to fertilizer granule surface earlier at the granulation in-process, has the coating film of being made by aerated concrete powder and modified starch again for fertile effect composition is by fully fixed, meets water and can not directly all collapse dissolving loss, and microporous structure can keep the stable dissolving of fertile effect to give off all the time, thereby has played the slow-release effect, has promoted biological bacterial fertilizer's environmental tolerance, guarantees the long-term stability of its fertile effect.
Description
Technical Field
The invention relates to the technical field of fertilizer production, in particular to a granulation method of a microbial fertilizer.
Background
The fertilizer is an important guarantee for increasing the yield of grains, and the contribution rate of the fertilizer to the grain yield in the world is 50 percent. China is the country with the most fertilizers in the world, but at present, the total amount of fertilizers in China is insufficient, the structures of fertilizers and fertilizers are unreasonable, the fertilizer distribution areas are unbalanced, waste is serious and the like, the utilization rate of chemical fertilizers is low, and a large amount of fertilizers which are not absorbed and utilized by crops enter the environment after being applied, so that the environment is polluted. Not only the land resources are destroyed, but also the health of human beings is threatened. Therefore, the improvement of the fertilizer utilization rate is of great significance. As an environment-friendly high and new technology product, the biological bacterial fertilizer has the advantages of improving the utilization rate of the fertilizer, reducing the using amount of the fertilizer and the fertilizing times, saving labor force, reducing environmental pollution, improving the quality of agricultural products and the like, and is a trend of carriers and fertilizer development of scientific fertilizing technology.
However, the currently produced biological bacterial manure has a disadvantage that the biological bacterial manure is easily affected by environmental factors, for example, in rainy season, the rapidly dissolved biological bacterial manure is easily lost along with rainwater, so that the fertilizer efficiency maintenance time is short and the fertilizer efficiency stability is poor.
Disclosure of Invention
The invention aims to provide a granulation method of a microbial fertilizer, which solves the problems of short fertilizer efficiency maintaining time and poor fertilizer efficiency stability of the existing microbial fertilizer through improvement of a granulation process.
The invention realizes the purpose through the following technical scheme:
a granulation method of a microbial fertilizer comprises the following steps:
the method comprises the following steps: carrying out solid fermentation on an organic material containing microbial bacteria to obtain a bacterial fertilizer, and then carrying out molding granulation on the bacterial fertilizer to obtain bacterial fertilizer particles;
step two: carrying out surface mechanical activation treatment on the bacterial manure particles;
step three: respectively preparing modified starch with the particle size of 0.01-5 mu m and aerated concrete powder with the particle size of 50-200 mu m, mixing the modified starch and the aerated concrete powder, adding a dispersing solvent, and stirring to obtain coating slurry;
step four: and (4) coating the activated bacterial fertilizer particles by using coating slurry, and drying to obtain the microbial fertilizer.
In a further improvement, the microorganism is selected from one or more of bacillus subtilis, bacillus laterosporus, bacillus natto, saccharomycetes, bacillus licheniformis and bacillus megaterium.
The further improvement is that the organic material is selected from one or more of animal wastes, straw powder, vinasse, edible fungi fruiting materials, soybean meal, peanut bran, traditional Chinese medicine residues and mildewed grain feeds.
In a further improvement, the operation of the solid fermentation is as follows: fermenting under ventilation condition with ventilation volume of 0.4-0.8vvm, stirring, aerating, naturally heating, controlling temperature at 35-45 deg.C, oxygen content at 8-15%, and pH at 6-8 for 3-5 d.
In a further improvement, the surface mechanical activation treatment refers to that bacterial manure particles are placed in a steel wire ball mill box for stirring.
The further improvement is that the preparation steps of the modified starch are as follows: taking starch, carrying out crosslinking etherification reaction on the starch for 10-12h by using a crosslinking agent and an etherifying agent at 40-50 ℃ to obtain a precursor, adding sodium polyacrylate and carob bean gum into the precursor, adding water, fully stirring for reaction for 5-20h, and drying and pasting a reaction product to obtain modified starch.
The further improvement is that the weight ratio of the starch to the cross-linking agent, the etherifying agent, the sodium polyacrylate, the carob bean gum and the water is 100 (0.5-1): 5-10): 0.4-2): 1-4): 100-.
The further improvement is that the aerated concrete powder is obtained by crushing an aerated concrete product, and the raw materials of the aerated concrete product comprise, by weight, 13.8% of portland cement, 13.8% of lime, 2.96% of gypsum, 0.0008% of a gas former and the balance of fly ash.
The further improvement is that the mixing weight ratio of the modified starch to the aerated concrete powder is (5-18) to (18-25).
The further improvement is that the coating treatment refers to atomizing the coating slurry by using high-pressure gas, carrying out spray coating on the bacterial manure particles in a fluidized bed, and then naturally cooling.
The invention has the beneficial effects that: this biological bacterial fertilizer is in the granulation process, carry out activation treatment to fertilizer granule surface earlier, the cladding has the coating film of being made by aerated concrete powder and modified starch again, wherein the surface and the inside of aerated concrete powder have a large amount of micropores, can regard as the protection carrier of base fertilizer, and modified starch plays the bonding effect on the one hand, ionic group and the cooperation of aerated concrete powder in the modified starch of on the other hand form space network structure, make fertilizer efficiency composition fully fixed, meet direct whole collapse of water and dissolve the loss, and microporous structure can keep the stable solution of fertilizer efficiency to give off all the time, thereby has played the slow release effect, the environmental tolerance of biological bacterial fertilizer has been promoted, guarantee the long-term stability of its fertilizer efficiency.
Detailed Description
The present application is described in further detail below with reference to examples, and it should be noted that the following detailed description is provided for further explanation of the present application and should not be construed as limiting the scope of the present application, and that certain insubstantial modifications and adaptations of the present application may be made by those skilled in the art based on the above-mentioned disclosure.
Example 1
A granulation method of a microbial fertilizer comprises the following steps:
the method comprises the following steps: carrying out solid fermentation on an organic material containing microbial bacteria to obtain a bacterial fertilizer, and then carrying out molding granulation on the bacterial fertilizer to obtain bacterial fertilizer particles, wherein the microbial bacteria are bacillus subtilis, and the organic material is cow dung;
the solid fermentation operation is as follows: fermenting under ventilation condition with ventilation volume of 0.4vvm, stirring, aerating, naturally heating, controlling temperature at 35 deg.C, oxygen content at 8%, and pH at 6, and fermenting for 5 d;
step two: placing the bacterial manure particles in a steel wire ball mill box for stirring so as to carry out surface mechanical activation treatment;
step three: respectively preparing modified starch with the particle size of 0.01-1 mu m and aerated concrete powder with the particle size of 50-70 mu m, mixing the modified starch and the aerated concrete powder according to the weight ratio of 5:18, and adding a dispersion solvent (water) to stir to obtain coating slurry;
the preparation steps of the modified starch are as follows: taking starch, carrying out crosslinking etherification reaction on the starch for 12 hours by using a crosslinking agent and an etherifying agent at 40 ℃ to obtain a precursor, adding sodium polyacrylate and carob bean gum into the precursor, adding water, fully stirring for reaction for 5 hours, and drying and pasting a reaction product to obtain modified starch; wherein the weight ratio of the starch to the cross-linking agent, the etherifying agent, the sodium polyacrylate, the carob bean gum and the water is 100:0.5:5:0.4:1: 100;
the aerated concrete powder is obtained by crushing an aerated concrete product, and the raw materials of the aerated concrete product comprise, by weight, 13.8% of portland cement, 13.8% of lime, 2.96% of gypsum, 0.0008% of a gas former and the balance of fly ash.
Step four: and (3) atomizing the coating slurry by using high-pressure gas, carrying out spray coating on the bacterial fertilizer particles in a fluidized bed, naturally cooling, and drying to obtain the microbial fertilizer.
Example 2
A granulation method of a microbial fertilizer comprises the following steps:
the method comprises the following steps: carrying out solid fermentation on an organic material containing microbial bacteria to obtain a bacterial fertilizer, and then carrying out molding granulation on the bacterial fertilizer to obtain bacterial fertilizer particles, wherein the microbial bacteria are bacillus natto, and the organic material is straw powder;
the solid fermentation operation is as follows: fermenting under ventilation condition with ventilation volume of 0.6vvm, stirring, aerating, naturally heating, controlling temperature at 40 deg.C, oxygen content at 12%, and pH at 7, and fermenting for 4 d;
step two: placing the bacterial manure particles in a steel wire ball mill box for stirring so as to carry out surface mechanical activation treatment;
step three: respectively preparing modified starch with the particle size of 1-2 microns and aerated concrete powder with the particle size of 100-120 microns, mixing the modified starch and the aerated concrete powder according to the weight ratio of 11:21, adding a dispersion solvent, and stirring to obtain coating slurry;
the preparation steps of the modified starch are as follows: taking starch, carrying out crosslinking etherification reaction on the starch for 11 hours by using a crosslinking agent and an etherifying agent at 45 ℃ to obtain a precursor, adding sodium polyacrylate and carob bean gum into the precursor, adding water, fully stirring for reaction for 13 hours, and drying and pasting a reaction product to obtain modified starch; wherein the weight ratio of the starch to the cross-linking agent, the etherifying agent, the sodium polyacrylate, the carob bean gum and the water is 100:0.8:8:1.2:3: 150;
the aerated concrete powder is obtained by crushing an aerated concrete product, and the raw materials of the aerated concrete product comprise, by weight, 13.8% of portland cement, 13.8% of lime, 2.96% of gypsum, 0.0008% of a gas former and the balance of fly ash.
Step four: and (3) atomizing the coating slurry by using high-pressure gas, carrying out spray coating on the bacterial fertilizer particles in a fluidized bed, naturally cooling, and drying to obtain the microbial fertilizer.
Example 3
A granulation method of a microbial fertilizer comprises the following steps:
the method comprises the following steps: carrying out solid fermentation on an organic material containing microbial bacteria to obtain a bacterial fertilizer, and then carrying out molding granulation on the bacterial fertilizer to obtain bacterial fertilizer particles, wherein the microbial bacteria are bacillus licheniformis and bacillus megaterium (mixed by equal weight), and the organic material is soybean meal;
the solid fermentation operation is as follows: fermenting under ventilation condition with ventilation volume of 0.8vvm, stirring, aerating, naturally heating, controlling temperature at 45 deg.C, oxygen content at 15%, and pH at 8, and fermenting for 3 d;
step two: placing the bacterial manure particles in a steel wire ball mill box for stirring so as to carry out surface mechanical activation treatment;
step three: respectively preparing modified starch with the particle size of 4-5 microns and aerated concrete powder with the particle size of 180-200 microns, mixing the modified starch and the aerated concrete powder according to the weight ratio of 1:1, adding a dispersion solvent, and stirring to obtain coating slurry;
the preparation steps of the modified starch are as follows: taking starch, carrying out crosslinking etherification reaction on the starch for 10 hours at 50 ℃ by using a crosslinking agent and an etherifying agent to obtain a precursor, adding sodium polyacrylate and carob bean gum into the precursor, adding water, fully stirring for reaction for 20 hours, and drying and pasting a reaction product to obtain modified starch; wherein the weight ratio of the starch to the cross-linking agent to the etherifying agent to the sodium polyacrylate to the carob bean gum to the water is 100:1:10:2:4: 200;
the aerated concrete powder is obtained by crushing an aerated concrete product, and the raw materials of the aerated concrete product comprise, by weight, 13.8% of portland cement, 13.8% of lime, 2.96% of gypsum, 0.0008% of a gas former and the balance of fly ash.
Step four: and (3) atomizing the coating slurry by using high-pressure gas, carrying out spray coating on the bacterial fertilizer particles in a fluidized bed, naturally cooling, and drying to obtain the microbial fertilizer.
Comparative example 1
A granulation method of microbial fertilizer, which has the same steps as the example 2, and the only difference is that: the modified starch is changed into the common starch.
Comparative example 2
A granulation method of microbial fertilizer, which has the same steps as the example 2, and the only difference is that: the aerated concrete powder is changed into the common concrete powder.
Comparative example 3
A granulation method of microbial fertilizer, which has the same steps as the example 2, and the only difference is that: removing the modified starch component and replacing the modified starch component with equal weight of aerated concrete powder.
Comparative example 4
A granulation method of microbial fertilizer, which has the same steps as the example 2, and the only difference is that: removing the powder component of the aerated concrete, and replacing the powder component with modified starch with equal weight.
In order to examine the effect of the microorganisms prepared in the above examples, the following analysis of characteristics and growth experiments were carried out:
first, character analysis
The shape was evaluated from the appearance, hardness and water-in disintegration results:
second, planting test
1. Test time:
04/01/2021 to 06/01/2021.
2. Test site:
new product experimental place (Anhui, Xuan city) of Anhui Galya ecological engineering Limited.
3. And (3) test crops:
chinese cabbage (common edible vegetable in leaf vegetables) for four seasons.
4. The test method comprises the following steps:
dividing 7 test lands, sowing Chinese cabbages in four seasons according to the row spacing of 15 cm and the plant spacing of 8-10 cm, taking the microbial strain samples prepared in the above examples 1-3 and comparative examples 1-4, respectively applying the samples to each test land according to the application amount of 50 kg/mu each time, applying fertilizer once every 20 days, watering the test lands on the second day after each fertilizer application, and taking the condition that the soil in the vertical projection coverage area of the plants is completely infiltrated and generates surface flow as the standard for each watering. After 60 days of growth, the growth of the pakchoi in each test area was observed and data was recorded.
5. And (3) test results:
the average data of the pakchoi in each test area are shown in the table, and the data in the table show that the pakchoi applied with the microbial bacteria prepared in the embodiments 1 to 3 of the invention has good growth vigor, the fresh weight of the whole strain reaches more than 25g and the highest value is more than 28g, the fresh weight ratio of the whole strain reaches about 90 percent without counting roots, and the other data have good performance on the height of the strain, the number of leaves and the maximum width of the leaves. In the comparative examples 1 and 2, the modified starch is replaced by the common starch, and the aerated concrete powder is replaced by the common concrete powder, so that the growth vigor of the pakchoi is relatively poor, which shows that the modified starch and the aerated concrete powder are very critical, and the effect is obviously better than that of the common starch and the concrete powder. In addition, the comparative examples 3 and 4 only adopt one component of the modified starch or the aerated concrete powder, so that the growth vigor of the pakchoi is relatively worse, and the modified starch and the aerated concrete powder can only play the best effect when being used in a matching way, but have poor single use effect.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A granulation method of microbial fertilizer is characterized by comprising the following steps: comprises the steps of
The method comprises the following steps: carrying out solid fermentation on an organic material containing microbial bacteria to obtain a bacterial fertilizer, and then carrying out molding granulation on the bacterial fertilizer to obtain bacterial fertilizer particles;
step two: carrying out surface mechanical activation treatment on the bacterial manure particles;
step three: respectively preparing modified starch with the particle size of 0.01-5 mu m and aerated concrete powder with the particle size of 50-200 mu m, mixing the modified starch and the aerated concrete powder, adding a dispersing solvent, and stirring to obtain coating slurry;
step four: and (4) coating the activated bacterial fertilizer particles by using coating slurry, and drying to obtain the microbial fertilizer.
2. The granulation method of the microbial fertilizer as claimed in claim 1, wherein: the microorganism bacteria are selected from one or more of bacillus subtilis, bacillus laterosporus, bacillus natto, saccharomycetes, bacillus licheniformis and bacillus megaterium.
3. The granulation method of the microbial fertilizer as claimed in claim 1, wherein: the organic material is selected from one or more of animal waste, straw powder, vinasse, edible fungus fruiting material, soybean meal powder, peanut bran, traditional Chinese medicine residue and mildewed grain feed.
4. The granulation method of the microbial fertilizer as claimed in claim 1, wherein: the solid fermentation operation is as follows: fermenting under ventilation condition with ventilation volume of 0.4-0.8vvm, stirring, aerating, naturally heating, controlling temperature at 35-45 deg.C, oxygen content at 8-15%, and pH at 6-8 for 3-5 d.
5. The granulation method of the microbial fertilizer as claimed in claim 1, wherein: the surface mechanical activation treatment refers to that bacterial manure particles are placed in a steel wire ball mill box to be stirred.
6. The granulation method of the microbial fertilizer as claimed in claim 1, wherein: the preparation steps of the modified starch are as follows: taking starch, carrying out crosslinking etherification reaction on the starch for 10-12h by using a crosslinking agent and an etherifying agent at 40-50 ℃ to obtain a precursor, adding sodium polyacrylate and carob bean gum into the precursor, adding water, fully stirring for reaction for 5-20h, and drying and pasting a reaction product to obtain modified starch.
7. The granulation method of the microbial fertilizer as claimed in claim 6, wherein: the weight ratio of the starch to the cross-linking agent, the etherifying agent, the sodium polyacrylate, the carob bean gum and the water is 100 (0.5-1): 5-10): 0.4-2): 1-4): 100-200).
8. The granulation method of the microbial fertilizer as claimed in claim 1, wherein: the aerated concrete powder is obtained by crushing an aerated concrete product, and the raw materials of the aerated concrete product comprise, by weight, 13.8% of portland cement, 13.8% of lime, 2.96% of gypsum, 0.0008% of a gas former and the balance of fly ash.
9. The granulation method of the microbial fertilizer as claimed in claim 1, wherein: the mixing weight ratio of the modified starch to the aerated concrete powder is (5-18) to (18-25).
10. The granulation method of the microbial fertilizer as claimed in claim 1, wherein: the coating treatment refers to atomizing the coating slurry by using high-pressure gas, carrying out spray coating on bacterial manure particles in a fluidized bed, and then naturally cooling.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113754492A (en) * | 2021-10-11 | 2021-12-07 | 广东轻工职业技术学院 | Organic granular bacterial fertilizer for planting dendrobium officinale and preparation method thereof |
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| CN114700362A (en) * | 2022-03-08 | 2022-07-05 | 山东大学 | Method for preventing and treating soil heavy metal pollution by using microbial agent |
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| CN114831211A (en) * | 2022-05-17 | 2022-08-02 | 广西富鹏农牧有限公司 | Leaven for soybean meal feed |
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Application publication date: 20210827 |