The optimal operating temperature for an organic fertilizer disk granulator machine is 30-55℃. The core principle is low-temperature granulation, which ensures high pellet formation rate while maximizing the retention of active microorganisms and organic matter in the organic fertilizer.

1. Core Temperature Range Adaptation Logic

• Mainstream Adaptable Temperature: For conventional organic fertilizer and bio-organic fertilizer granulation, a stable temperature of 30-55℃ is optimal. Within this range, material viscosity is optimal, the pellet formation rate can reach 85%-95%, and the survival rate of microorganisms in bio-organic fertilizer can be increased to over 80%.

• Golden Temperature Node: For bio-organic fertilizer granulation using Bacillus subtilis or similar bacteria as the core microbial community, around 45℃ is the golden temperature, allowing the microbial community survival rate to reach up to 90%, reducing the loss of active ingredients.

• Temperature Red Line: Temperatures must not exceed 60℃; otherwise, the microbial inactivation rate will exceed 70%, and the loss rate of active organic matter such as humic acid will also exceed 20%, significantly weakening the fertilizer effect.

2. Temperature Fine-tuning for Different Scenarios

• Bio-organic fertilizer: Strictly controlled at 30-55℃, maintaining low temperature throughout to prevent microbial death. No high-temperature steam conditioning is required; only room-temperature water replenishment is needed.

• Urea-containing compound organic fertilizer: The higher the urea content, the lower the temperature needs to be. When the urea content is 21%-38%, the temperature should be controlled at around 55℃ to prevent urea from melting and clumping.

• Ammonium chloride-containing compound organic fertilizer: Slightly higher temperature resistance; the temperature range can be relaxed to 65-80℃ without affecting the stability of the raw materials and the molding effect.