The quality of granules produced by a disc granulation line depends not only on adjustments made during the granulation stage itself but also—and crucially—on the uniformity of the material’s fermentation at the front end. The double screws compost turner is the key piece of equipment for ensuring fermentation quality, thereby laying the material foundation for the disc granulation process.

Granule size and uniformity in disc granulation are influenced by factors such as the disc’s inclination angle, rotational speed, and the material’s moisture content. These parameters can be adjusted according to raw material characteristics, achieving a pelletization rate of over 90% and producing well-rounded granules.

However, even the most precise granulation parameters cannot compensate for inherent material defects. If fermentation is incomplete, moisture distribution is uneven, or large clumps persist, the pelletization rate will drop significantly once the material enters the granulation disc. This is where the double screws compost turning machine plays a pivotal role: its two parallel screw shafts rotate in opposite directions, lifting material from the bottom of the fermentation pit to the top and scattering it outward. This process ensures full contact between the material and the air, supplying oxygen to aerobic microorganisms, accelerating organic matter decomposition and moisture evaporation, and guaranteeing uniform material decomposition.

Within the overall disc granulation production line, the compost turner operates at the front end, transforming raw materials into uniformly decomposed organic matter, while the disc granulator handles the forming stage, turning the prepared material into spherical granules. Intermediate equipment—such as crushers and mixers—connects these stages, while downstream units handle drying, screening, and packaging.

In summary, the effectiveness of disc granulation relies heavily on the quality of the material’s prior fermentation. By employing a high-efficiency double screws compost turner to ensure uniform decomposition and combining this with precise granulation adjustments, the production line can consistently yield high-quality organic fertilizer products featuring well-rounded granules.