What Is The Process Of Organic Fertilizer Manufacturing

Organic fertilizer is a type of fertilizer made from natural materials, such as compost, animal manure, and plant residues. It provides essential nutrients to plants while improving soil structure and fertility. Here’s a general overview of the organic fertilizer manufacturing process:

Raw Material Preparation:

Start by gathering the organic materials needed for the fertilizer. These can include compost, animal manure, crop residues, and other organic matter.


Ensure that the raw materials are thoroughly composted and free from contaminants and pathogens. This is essential for quality organic fertilizer making. For more quickly aerobic fermentation, you can buy a professional compost machine.

Material Grinding (Optional):

If the raw materials are not in a suitable size or consistency for granulation, you may need to grind or shred them into smaller particles. This step helps in achieving uniform granule size.

Mixing and Blending:

Blend the raw materials together to create a homogeneous mixture. The mixture should have a balanced carbon-to-nitrogen ratio. You may also add other organic or mineral materials as needed to adjust the nutrient content. Therefore, you can prepare organic fertilizer which can supply nutrients to crops effectively.

Moisture Adjustment:

Ensure that the moisture content of the mixture is optimal for granulation. Typically, the moisture content should be around 20-30%. You can add water or drying agents to achieve the desired moisture level.


There are several methods for granulating organic fertilizers, including:

  • Extrusion: In this method, the moist mixture is forced through a die to create cylindrical or spherical granules.
  • Roller Pressing: The mixture is passed between two counter-rotating rollers, which compress and shape it into granules.
  • Pan Granulation: The mixture is placed in a pan granulator, and a rotating drum shapes it into granules.
Extrusion granulation line for organic fertilizer production

Extrusion granulation line for organic fertilizer production


After granulation, the moisture content of the fertilizer needs to be reduced to around 10% or lower to prevent spoilage. Use a rotary dryer or other suitable drying equipment to remove excess moisture.


The hot granules from the drying process should be cooled down to room temperature. A cooling machine or conveyor system can help with this.

Screening and Grading:

Screen the cooled granules to remove any oversized or undersized particles. This step ensures uniform size and quality.

Coating (Optional):

Depending on the requirements, you may add a coating to the granules to enhance their appearance or slow down nutrient release.


Package the finished organic fertilizer granules in bags or containers suitable for distribution and sale.

Quality Control and Testing:

Periodically test the granules for nutrient content, granule size, and other quality parameters to ensure they meet the desired specifications and regulatory standards.

In addition, the specific equipment and techniques used in organic fertilizer manufacturing may vary depending on the different scales, methods or materials of organic fertilizer production and the desired granule characteristics. Additionally, compliance with local regulations and quality standards is essential throughout the manufacturing process. Click here to learn more.

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