Granulation method of microbial fertilizer

Abstract

The invention discloses a granulation method of a microbial fertilizer. The method comprises: carrying out solid fermentation on an organic material containing microbial bacteria to obtain a bacterial fertilizer, and carrying out molding granulation on the bacterial fertilizer to obtain bacterial fertilizer particles; carrying out surface mechanical activation treatment on the bacterial fertilizer particles; respectively preparing modified starch with the particle size of 0.01-5 microns and aerated concrete powder with the particle size of 50-200 microns, mixing the modified starch with the aerated concrete powder, adding a dispersing solvent, and stirring to obtain coating slurry; and carrying out coating treatment on the bacterial fertilizer particles by using the coating slurry, and drying to obtain the microbial fertilizer. In the granulation process of the biological bacterial fertilizer, the surfaces of fertilizer particles are firstly activated and then coated with the coating film prepared from the aerated concrete powder and the modified starch, so that fertilizer efficiency components are fully fixed and cannot be directly and completely collapsed, dissolved and lost when meeting water, and stable dissolution and emission of the fertilizer efficiency can be always kept by the microporous structure; therefore, the slow-release effect is achieved, the environmental tolerance of the biological bacterial fertilizer is improved, and the long-term stability of the fertilizer efficiency is ensured.

Description

technical field

[0001] The invention relates to the technical field of chemical fertilizer production, in particular to a granulation method of microbial fertilizer. Background technique

[0002] Fertilizers are an important guarantee for increasing grain production. In today's world, chemical fertilizers contribute 50% to increasing grain production. China is the country that uses the most fertilizers in the world, but at present, the total amount of chemical fertilizers in my country is insufficient, the structure of fertilization and fertilizers is unreasonable, the distribution of fertilizers is unbalanced, and waste is serious. The utilization rate of chemical fertilizers is low, and they are not absorbed by crops after application. Fertilizers enter the environment in large quantities, causing pollution to the environment. It not only destroys land resources, but also poses a threat to human health. Therefore, it is of great significance to improve fertilizer use effi...

Examples

Embodiment 1

[0023] A method for granulating microbial fertilizer, the steps comprising:

[0024] Step 1: Carry out solid fermentation of the organic material containing microorganisms to obtain bacterial fertilizer, and then shape and granulate the bacterial fertilizer to obtain bacterial fertilizer granules, the microbial bacteria is Bacillus subtilis, and the organic material is cow dung;

[0025] The operation of solid fermentation is as follows: ferment under the ventilation condition of 0.4vvm ventilation, stir, aerate, naturally heat up, and ferment for 5 days under the conditions of controlling temperature at 35°C, oxygen content at 8%, and pH value at 6;

[0026] Step 2: Place the bacterial fertilizer particles in a steel wire ball mill for stirring to perform surface mechanical activation treatment;

[0027] Step 3: Prepare modified starch with a particle size of 0.01-1 μm and aerated concrete powder with a particle size of 50-70 μm respectively, mix the modified starch with the ...

Embodiment 2

[0032] A method for granulating microbial fertilizer, the steps comprising:

[0033] Step 1: Carry out solid fermentation of the organic material containing microbial bacteria to obtain bacterial fertilizer, and then shape and granulate the bacterial fertilizer to obtain bacterial fertilizer granules. The microbial bacteria is Bacillus natto, and the organic material is straw powder;

[0034] The operation of solid fermentation is as follows: ferment under the ventilation condition of 0.6vvm ventilation, stir, aerate, naturally heat up, and ferment for 4 days under the conditions of controlling temperature at 40°C, oxygen content at 12%, and pH value at 7;

[0035] Step 2: Place the bacterial fertilizer particles in a steel wire ball mill for stirring to perform surface mechanical activation treatment;

[0036] Step 3: prepare modified starch with a particle size of 1-2 μm and aerated concrete powder with a particle size of 100-120 μm, mix the modified starch and aerated concr...

Embodiment 3

[0041] A method for granulating microbial fertilizer, the steps comprising:

[0042] Step 1: Carry out solid fermentation of organic materials containing microbial bacteria to obtain bacterial fertilizer, and then mold and granulate the bacterial fertilizer to obtain bacterial fertilizer granules. The microbial bacteria are Bacillus licheniformis and Bacillus megaterium (mixed by equal weight), and the organic material is soybean meal;

[0043] The operation of solid fermentation is as follows: ferment under the ventilation condition of 0.8vvm ventilation, stir, aerate, naturally heat up, and ferment for 3 days under the conditions of controlling temperature at 45°C, oxygen content at 15%, and pH value at 8;

[0044] Step 2: Place the bacterial fertilizer particles in a steel wire ball mill for stirring to perform surface mechanical activation treatment;

[0045] Step 3: prepare modified starch with a particle size of 4-5 μm and aerated concrete powder with a particle size of...

technical field

[0001] The invention relates to the technical field of chemical fertilizer production, in particular to a granulation method of microbial fertilizer. Background technique

[0002] Fertilizers are an important guarantee for increasing grain production. In today's world, chemical fertilizers contribute 50% to increasing grain production. China is the country that uses the most fertilizers in the world, but at present, the total amount of chemical fertilizers in my country is insufficient, the structure of fertilization and fertilizers is unreasonable, the distribution of fertilizers is unbalanced, and waste is serious. The utilization rate of chemical fertilizers is low, and they are not absorbed by crops after application. Fertilizers enter the environment in large quantities, causing pollution to the environment. It not only destroys land resources, but also poses a threat to human health. Therefore, it is of great significance to improve fertilizer use effi...

Examples

Embodiment 1

[0023] A method for granulating microbial fertilizer, the steps comprising:

[0024] Step 1: Carry out solid fermentation of the organic material containing microorganisms to obtain bacterial fertilizer, and then shape and granulate the bacterial fertilizer to obtain bacterial fertilizer granules, the microbial bacteria is Bacillus subtilis, and the organic material is cow dung;

[0025] The operation of solid fermentation is as follows: ferment under the ventilation condition of 0.4vvm ventilation, stir, aerate, naturally heat up, and ferment for 5 days under the conditions of controlling temperature at 35°C, oxygen content at 8%, and pH value at 6;

[0026] Step 2: Place the bacterial fertilizer particles in a steel wire ball mill for stirring to perform surface mechanical activation treatment;

[0027] Step 3: Prepare modified starch with a particle size of 0.01-1 μm and aerated concrete powder with a particle size of 50-70 μm respectively, mix the modified starch with the ...

Embodiment 2

[0032] A method for granulating microbial fertilizer, the steps comprising:

[0033] Step 1: Carry out solid fermentation of the organic material containing microbial bacteria to obtain bacterial fertilizer, and then shape and granulate the bacterial fertilizer to obtain bacterial fertilizer granules. The microbial bacteria is Bacillus natto, and the organic material is straw powder;

[0034] The operation of solid fermentation is as follows: ferment under the ventilation condition of 0.6vvm ventilation, stir, aerate, naturally heat up, and ferment for 4 days under the conditions of controlling temperature at 40°C, oxygen content at 12%, and pH value at 7;

[0035] Step 2: Place the bacterial fertilizer particles in a steel wire ball mill for stirring to perform surface mechanical activation treatment;

[0036] Step 3: prepare modified starch with a particle size of 1-2 μm and aerated concrete powder with a particle size of 100-120 μm, mix the modified starch and aerated concr...

Embodiment 3

[0041] A method for granulating microbial fertilizer, the steps comprising:

[0042] Step 1: Carry out solid fermentation of organic materials containing microbial bacteria to obtain bacterial fertilizer, and then mold and granulate the bacterial fertilizer to obtain bacterial fertilizer granules. The microbial bacteria are Bacillus licheniformis and Bacillus megaterium (mixed by equal weight), and the organic material is soybean meal;

[0043] The operation of solid fermentation is as follows: ferment under the ventilation condition of 0.8vvm ventilation, stir, aerate, naturally heat up, and ferment for 3 days under the conditions of controlling temperature at 45°C, oxygen content at 15%, and pH value at 8;

[0044] Step 2: Place the bacterial fertilizer particles in a steel wire ball mill for stirring to perform surface mechanical activation treatment;

[0045] Step 3: prepare modified starch with a particle size of 4-5 μm and aerated concrete powder with a particle size of...

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