I. Optimal Moisture Range (Based on Raw Material Ratio)

• Livestock and poultry manure (≥70%): 25%–30%. Highly viscous; high moisture content easily leads to sticking to the disc, clumping, and a sharp drop in pelleting rate.

• Straw/fiber-based materials (≥60%): 30%–35%. Highly hygroscopic and weakly binding; higher moisture content is required to enhance agglomeration.

• Mixed organic fertilizer (manure + straw + mushroom residue): 28%–32%, achieving optimal pelleting rate and uniformity.

II. Impact of Abnormal Moisture Content

• Moisture < 25%: Insufficient binding force, pelleting rate < 60%, high dust levels, excessive return material, and high energy consumption.

• Moisture > 35%: Material sticks to the tray, forms large clumps, particles adhere, screening is difficult, and drying costs increase significantly.

• Ideal state: Forms a clump when squeezed, disperses easily with a light touch, and falls apart without sticking.

III. Moisture Adjustment Methods

• Low moisture content: Atomize water spraying (1%–3%) inside the mixer, combined with fine-tuning the disc speed/tilt angle.

• High moisture content: Add 3%–5% bentonite/humic acid, or extend fermentation and aerate to reduce humidity.

• Precise control: Use a rapid moisture meter for real-time detection, combined with frequency converter water replenishment/negative pressure exhaust to stabilize humidity.

IV. Key Points of Supporting Processes

• Grind materials to ≤3mm, fiber length ≤2mm to improve pelleting uniformity.

• The disc tilt angle is 35°–45° and the rotation speed is 15–25 r/min, which is dynamically adjusted according to the moisture content.