In many biofertilizer plants, achieving consistent pellet quality depends heavily on how well the raw material moisture is controlled during granulation. This is especially true in production systems using a disc granulator, also known as a pan granulator, fertilizer pelletizing disc, or round plate granulating machine. Because biofertilizer powders often vary in humidity, fiber content, and microbial activity, moisture management becomes one of the most critical factors influencing granule strength, size uniformity, and overall production stability.
Why Moisture Matters in Biofertilizer Granulation
For stable disc pelletizing, materials usually need a moisture range between 25%–35%, depending on the fermentation level and ingredient composition.
If the moisture is too low, the material becomes dusty and difficult to roll into balls on the pan surface. Pellets remain small, fragile, and uneven.
If the moisture is too high, wet clumps form, the material sticks to the disc surface, and oversized balls appear.
Maintaining this balance is particularly important for biofertilizers rich in:
- Chicken manure, cow dung, pig manure
- Humic acid powder
- Compost-based microbial materials
- Organic-mineral blends
These materials naturally absorb or release moisture during mixing, making precise control essential.
Practical Moisture Control Methods
Producers who operate a biofertilizer disc granulation line can improve stability with several techniques:
1. Pre-conditioning and uniform mixing
Before entering the pan granulator, raw materials should be processed through a mixer to evenly distribute moisture. High-humidity compost can be combined with dried powder materials to correct the water ratio naturally.
2. Real-time water spray adjustment
Most organic fertilizer pan granulators are equipped with a water-spraying system. Operators should adjust spray intensity based on:
- Powder looseness
- Rolling behavior
- Pellet formation speed
Micro-adjustments help maintain continuous granulation without interruptions.
3. Using dryers or dewatering equipment when materials vary wildly
When raw materials fluctuate seasonally, a simple solid–liquid separator, or a small dryer can help keep the feedstock consistent. This is common in regions where manure arrives with unpredictable moisture.
4. Monitoring fermentation maturity
Over-fermented materials can become overly dry, while fresh compost retains extra water. Setting up a stable composting stage ensures predictable moisture levels before granulation even begins. Learn more!
Where Disc Granulators Fit Into This Process
Because the disc pelletizer operates with adjustable angles and rotational speeds, it offers excellent flexibility for managing changing material moisture. This is why many small and medium biofertilizer producers prefer using a pan granulation system—it is easier to observe pellet formation and adjust water in real-time compared with closed-type granulators.
Modern disc granulators from manufacturers like YUSHUNXIN include:
- Automatic moisture spray control
- Adjustable disc inclination
- Visible granulation surface for instant feedback
These features help maintain stable output even with variable organic materials.
Contact us today to learn more about how our disc granulator can transform your business. Welcome to visit: https://www.biofertilizerproduction.com/product/disc-pelletizer-for-biofertilizer-making/
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