2026/04/07
To enhance the efficiency of organic fertilizer fermentation using a double screws compost turning machine, optimization is required across multiple aspects: material pretreatment, turning parameters, supporting processes, and equipment maintenance. This comprehensive approach ensures the simultaneous improvement of oxygen supply, temperature elevation, and material maturation.
Prior to fermentation, thorough material pretreatment is essential. Moisture content should be controlled within the 55%–65% range—ideally, the material should form a clump when squeezed by hand but crumble immediately upon release. The carbon-to-nitrogen (C/N) ratio should be adjusted to between 25:1 and 30:1, typically by incorporating materials such as straw or sawdust. The raw materials should be crushed to a particle size of 3–5 cm to prevent the formation of large clumps; simultaneously, inoculating the mixture with high-efficiency fermentation microbial agents accelerates the initial temperature rise.
The turning operation should be regulated in distinct phases. During the temperature-rising phase, turning should be performed 1–2 times daily at a depth of 0.8–1.2 meters to rapidly supply oxygen and elevate the temperature. During the high-temperature phase (maintaining 55–65°C), turning should occur once daily at a depth of 1.0–1.5 meters to eliminate anaerobic "dead zones." During the cooling and maturation phase, turning frequency should be reduced to once every 2–3 days, utilizing shallow turning to conserve heat. The machine's travel speed and helix rotation speed should be adjusted according to the material's moisture level: for high-moisture materials, a slow travel speed combined with a high rotation speed is recommended; for dry, loose materials, a fast travel speed with a medium rotation speed ensures uniform mixing and dispersion.
The dual-helix structure is optimized through a counter-rotating design, featuring cutting teeth that sever long fibers and prevent entanglement. The pitch angle of the blades and the spacing between the shafts are tailored to the specific characteristics of the material, thereby minimizing material adhesion and reducing operational resistance. The fermentation trough should be equipped with a bottom ventilation and aeration system; when combined with the turning operation, this creates a three-dimensional oxygen supply network that significantly enhances oxygen utilization efficiency.
Furthermore, the system should be integrated with an intelligent temperature control system that automatically adjusts the turning frequency based on the material's internal temperature—increasing the frequency during periods of overheating to dissipate heat, and decreasing it during periods of low temperature to conserve heat. Routine maintenance includes the timely removal of any entangled materials, as well as regular inspections of blade wear and bearing lubrication, to ensure the equipment remains in optimal working condition. Through the implementation of these measures, the overall fermentation cycle can be shortened by over 30%, resulting in more uniform maturation, more thorough harmless treatment, and a substantial improvement in overall fermentation efficiency.
