Cow manure is one of the most widely used raw materials in bio organic fertilizer production due to its balanced nutrient content and high organic matter. To improve handling efficiency, storage stability, and market value, many producers choose to convert composted cow dung into uniform fertilizer pellets. Among different granulation methods, the disc granulator, also known as a pan granulator or disc pelletizer, is a practical and flexible solution.
Why Disc Granulation Works Well for Cow Manure
After aerobic composting, cow manure typically becomes a fine, semi-dry powder with moderate moisture content. This physical condition makes it suitable for wet rolling granulation, which is exactly how a disc granulator operates.
Inside the rotating disc, raw material particles continuously roll and collide. With controlled moisture and rotation speed, fine particles gradually agglomerate into round pellets. Compared with extrusion or dry compaction, disc granulation offers:
Good control over pellet size
Smooth and uniform granule appearance
Lower mechanical stress on organic materials
These advantages make pan granulation technology popular in small to medium-scale cow manure biofertilizer plants.
Typical Process Flow for Cow Manure Pelletizing
A standard cow manure biofertilizer granulation process usually includes:
Composting and fermentation of fresh cow dung
Crushing and screening of composted material
Disc granulation with moisture adjustment
Drying, cooling, and screening
Final packaging
The disc granulator acts as the core pellet-forming unit, while upstream and downstream equipment ensures stable production and consistent quality.
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Adding Beneficial Microorganisms via Spray System
To enhance fertilizer functionality, many producers add beneficial microbial agents during the granulation stage. A practical approach is installing a spray system above the disc granulator.
This spraying device evenly applies liquid microbial inoculants, bio-enzymes, or nutrient solutions onto rolling pellets. Compared with dry mixing, spraying offers better distribution and adhesion, while avoiding excessive moisture accumulation.
Proper control of spray volume is critical. Excess liquid may cause pellet deformation, while insufficient spraying can lead to uneven microbial content. When correctly adjusted, this method helps produce biofertilizer pellets with active microorganisms and stable structure. Learn more!
Key Operating Factors to Watch
For stable disc granulation of cow manure fertilizer, operators should pay attention to:
Raw material moisture (usually 25–35%)
Disc inclination angle and rotation speed
Uniform feeding rate
Spray system consistency
Fine-tuning these parameters improves pellet roundness, strength, and yield.
Final Notes
Using a disc granulator for cow manure biofertilizer pellet production combines simplicity with flexibility. With the addition of a spraying system for microbial agents, producers can further enhance product value without complicating the process.
For those planning a cow manure biofertilizer project, understanding disc granulation principles and equipment configuration is a key step toward stable and scalable production. If you want to know more, welcome to visit: https://www.biofertilizerproduction.com/product/disc-pelletizer-for-biofertilizer-making/