2026/06/22
Fertilizer granulation is the critical final step in organic fertilizer processing. Compared to outdated crushing-based or simple roller-compaction granulation equipment, modern multifunctional granulation systems represent a significant technological upgrade. They overcome four major drawbacks of traditional methods: excessive dust generation, high levels of scrap/fines, inflexible formulations, and slow decomposition rates in the soil. These systems balance environmental sustainability with fertilizer efficacy and are suitable for the full range of granulation operations using livestock and poultry manure as raw materials.
Compared to traditional granulation equipment, modern integrated fertilizer granulation systems offer significant advantages in overall production performance. Traditional equipment relies on outdated processes—typically open-style compression granulation—lacking enclosed, dust-proof structures; this results in granules with rough, angular shapes and loose internal structures, leading to high breakage rates during handling and transport, as well as material losses of up to 15%. Furthermore, these older machines fail to meet environmental standards due to excessive workshop dust emissions and lack dedicated ports for injecting additives or binding agents to modify material properties. Consequently, granule density depends entirely on the raw material's inherent characteristics, resulting in inconsistent quality—either excessive fragility and high loss or excessive hardness—which hinders water permeability in the soil and delays the release of organic nutrients. In contrast, modern integrated granulation systems feature an enclosed granulation structure and standardized ports for additive injection. They produce uniform, spherical granules with superior crush resistance, reducing breakage rates during storage and transport to under 2% and cutting workshop dust emissions by over 75%. These systems facilitate compliant, eco-friendly organic fertilizer production, allowing for quality optimization through additives while balancing production loss control with the requirements for field decomposition, ultimately delivering far greater production stability than older models.
Two types of granulation equipment currently dominate the market for small-scale fertilizer plants, offering exceptional versatility. The first is the disc granulator, designed for small-to-medium production capacities. It utilizes centrifugal rolling and agglomeration to form granules, allowing for precise control of particle sizes between 2mm and 8mm and achieving a stable mass-production granulation rate of 80%. It is compatible with composted manure having a moisture content of 25%–35% and supports the uniform injection of liquid binders. The system produces highly spherical granules and operates within a fully enclosed housing to prevent dust leakage; it is easy to maintain and offers low initial investment costs, making it a multifunctional model with adjustable granule density.
The second type—the double-roller press granulator—is a specialized, energy-efficient dry-process machine rather than a multi-functional one. It utilizes a fixed process that cannot be switched to wet granulation and requires no water for conditioning; it is designed for dry, decomposed materials. Features include quick-change molds, the ability to customize granule shapes, and a high-pressure extrusion structure that ensures stability. The enclosed extrusion process eliminates dust emissions, making it ideal for large-scale, standardized production. While solid binders can be added to enhance granule durability, the process alters only the granule shape without allowing for porosity adjustments; it is best suited for continuous, large-scale standardized manufacturing.
In summary, traditional granulation equipment meets only basic shaping needs while suffering from high energy consumption, significant dust generation, and substantial material waste. In contrast, multi-functional disc granulators offer the advantages of low-dust eco-friendliness, adjustable formulations, and controllable granule characteristics. When paired with specialized twin-roll extrusion equipment, these systems cater to both small-scale, low-capacity operations and large-scale industrial production. They reduce dust pollution and material loss while enabling the customization of high-quality granules optimized for field application and rapid nutrient delivery, making them essential core equipment for the high-quality processing of bio-fertilizers.