Introduction
In biofertilizer production, the quality of your pellets determines everything from nutrient release efficiency to market competitiveness. Whether you're producing compost-based granules or digestate-derived products, getting the right pellet shape, size, and hardness is essential.
Disc pelletizers are known for their simplicity and flexibility—but to get consistent, high-quality pellets, producers must fine-tune several process parameters. This blog highlights what makes a “good” biofertilizer pellet and how to achieve it using disc granulation technology.
1. What Defines a High-Quality Biofertilizer Pellet?
A good biofertilizer pellet should meet these criteria:
- Uniform size: Typically 2–5 mm for easy spreading and packaging
- Spherical or semi-spherical shape: Improves flowability and appearance
- Moderate hardness: Strong enough to withstand handling but not so hard as to hinder breakdown in soil
- Low dust: Reduces loss and ensures clean packaging
- Stable microbial content (if applicable): Especially for biofertilizers with active strains
2. Key Factors That Affect Pellet Quality on a Disc Granulator
a. Moisture Content
- Ideal raw material moisture: 25–35%
- Too dry: pellets won’t form or easily crack
- Too wet: sticky balls, poor sphericity, and low strength
💡 Tip: Use a moisture analyzer or manual squeeze test to monitor in real time.
b. Disc Angle and Speed
- Typical disc inclination: 40–55 degrees
- Speed and tilt affect material layering and centrifugal force
- Too fast = scattered material, poor granulation
- Too slow = slow pellet formation, sticking
💡 Tip: Adjust angle and RPM based on material response during trial runs.
c. Raw Material Fineness
- Fine, uniform powder ensures smooth pellet formation
- Larger chunks or fibrous residues disrupt layering and reduce yield
Click here to get specific compatible materials.
💡 Tip: Pre-crush or screen compost and other inputs before feeding.
d. Binder or Water Spraying
- Optional water sprayers help bind powders naturally
- Some producers use organic binders (e.g., starch, molasses) for better pellet integrity
YUSHUNXIN can add the water spraying system to the pan granulator, welcome to consult !
💡 Tip: Add binders only if materials are hard to granulate or need extra strength.
3. Monitoring and Quality Control
Consistent quality requires ongoing checks:
- Screening system to remove oversize/undersize pellets
- Strength testing using simple drop tests or compression tools
- Regular visual checks during operation
Automation can help, but operator experience is still vital in small to medium lines.
Conclusion
A disc granulation machine gives you a flexible and affordable way to produce biofertilizer granules—but quality doesn't happen by accident. From moisture to material fineness and disc settings, each factor must be optimized.
Getting the granules right not only improves crop response but also increases product marketability and storage life. Welcome to visit : https://www.biofertilizerproduction.com/product/disc-pelletizer-for-biofertilizer-making/
Want help fine-tuning your disc granulation process? Contact us to optimize your pellet line setup or troubleshoot your current equipment.