The double screws compost turning machine is a piece of equipment specifically designed for aerobic fermentation processes, primarily used for turning materials at organic fertilizer plants, large-scale livestock farms, and sludge treatment facilities. Spanning the fermentation trough and traveling along rails on both sides, the machine utilizes two parallel spiral shafts rotating synchronously in opposite directions to lift, break up, and uniformly mix the material from the bottom of the trough.
It is capable of processing a wide range of raw materials, including organic wastes such as livestock and poultry manure, straw and sawdust, sugar mill filter mud, sludge and refuse, spent grains and oilseed cakes, and spent mushroom substrate. Within an organic fertilizer production line, the double screws compost turning machine is typically positioned between the solid-liquid separation stage and the aging/screening stage, serving as the core component for the biochemical reaction of the organic matter.
The core working principle of the double screws compost turning machine is defined by the synergy between "screw-based lifting" and "bidirectional shearing" The machine spans the fermentation channel, with travel wheels on both sides moving smoothly along rails. During operation, two rotating shafts equipped with continuous helical blades——driven by hydraulic motors or electric motors——rotate in opposite directions. The blades cut deep into the material, lifting cold, oxygen-deprived material from the bottom and casting it toward the center, creating a distinctive ”W“-shaped flow pattern.
This design disrupts laminar material flow while simultaneously facilitating forced aeration and material fragmentation. As the twin screw shafts rotate synchronously in opposite directions, the opposing forces of the blades gather material from the sides toward the center or disperse it from the center outward, achieving three-dimensional turning and deep mixing. The angle of the helical blades is optimized via CFD (Computational Fluid Dynamics) simulation, precisely controlling the casting distance to between 1.5 and 2.2 meters to ensure uniform fermentation.
Twin-screw turning assembly: Two symmetrically arranged screw shafts featuring staggered, wear-resistant turning blades; these constitute the machine's primary working components.
Rail-based travel system: Moves along pre-installed rails on both sides of the fermentation channel, ensuring precise positioning and eliminating the risk of deviation.
Drive system: Utilizes national-standard energy-efficient motors paired with hardened-gear reducers to provide stable power output.
Intelligent control system: Equipped with a PLC control panel or centralized control cabinet.
Frame and channel interface mechanism: Constructed from welded high-quality channel steel, ensuring robustness and stability.
The double screws compost turner is suitable for a wide range of applications:
Large-scale organic fertilizer plants: Used in conjunction with fermentation troughs and screening equipment to enable the large-scale, standardized production of organic fertilizer. The machine integrates seamlessly with crushers, mixers, and fermentation tanks, facilitating an all-in-one process that includes raw material crushing, mixing, turning, and composting.
Livestock and poultry farms: Converts manure and waste into high-quality organic fertilizer through centralized fermentation, enabling resource recovery. A large-scale pig farm (housing 10,000 head) achieved an annual manure processing capacity of over 120,000 tons after implementing this equipment.
Environmental solid waste treatment: Processes organic solid waste——such as municipal sludge and kitchen waste——achieving harmless disposal and resource recovery through intensive fermentation.
Horticulture and crop cultivation: Suitable for use in horticultural nurseries and Agaricus bisporus (button mushroom) farms for the fermentation, composting, and moisture reduction of organic waste.
Routine maintenance is relatively straightforward:
Check that all fasteners are secure and that bearing clearances in the drive components are appropriate.
Periodically lubricate bearings and check the oil level in the gear reducers. Change the oil in all gear reducers after the first 200 hours of continuous operation, and subsequently every six months.
Post-operation cleaning
Promptly remove material residue from the auger blades, frame, and travel mechanism.
Inspect the contactors within the electrical control cabinet.
Amidst the global trend toward the resource utilization of organic fertilizers and increasingly stringent environmental regulations regarding livestock and poultry waste, the double screws compost turning machine has emerged as the mainstream fermentation equipment for organic fertilizer plants and environmental upgrades at livestock facilities. It is favored for its deep turning capability, ability to ensure stable decomposition, space-saving design, and compatibility with a wide range of organic solid wastes. Drawing on years of practical project experience, Zhengzhou Huaqiang Heavy Industry offers equipment that balances durability, automation, and versatility, meeting the needs of operations ranging from small family workshops to large-scale industrial parks. When paired with complementary equipment—such as crushers, granulators, dryers, and screening systems——it enables the construction of a complete organic fertilizer processing line, representing the most cost-effective fermentation solution for organic waste resource utilization projects.
| Model | Main Motor | Small Car Moving Motor | Big Car Moving Motor |
Hydraulic Pump Motor |
| SLP-10m | 15KW | 1.5KWX2 | 1.5KWX2(4) | 4KW |
| SLP-12m | ||||
| SLP-15m | ||||
| SLP-20m |
