How to Pre-process Materials When Using a Windrow Compost Turning Machine?

As a core piece of equipment in organic fertilizer production and waste treatment, the operating efficiency and processing effect of a windrow compost turning machine largely depend on the scientific pre-processing of materials. Proper pre-processing can prevent equipment malfunctions, optimize the fermentation environment, and is fundamental to ensuring smooth subsequent production. The following details the key aspects of material pre-processing for crawler-type compost turners, starting from the core points.

First, strict control of material particle size is necessary, requiring crushing and screening. Crawler-type compost turners have specific requirements for material size. Overly large materials (such as straw, dead branches, and large pieces of organic fertilizer raw materials exceeding 50mm in diameter) will increase turning resistance, leading to insufficient turning, affecting fermentation uniformity, and potentially wearing down the equipment's tracks or jamming mechanical parts. Therefore, large materials must be crushed using a crusher, and then screened to remove particles that do not meet the standards, ensuring that the material particle size is controlled within the range of 20-50mm, creating favorable conditions for turning and fermentation.

Secondly, precisely adjust the material moisture content. Moisture content is a core parameter affecting fermentation efficiency and equipment operation. The suitable moisture content for crawler-type compost turner operation is 50%-60%. If the moisture content is too high, the material is prone to clumping, resulting in poor aeration during turning, which can breed anaerobic bacteria, produce foul odors, and reduce fermentation efficiency; if the moisture content is too low, it cannot meet the metabolic needs of microorganisms, and the fermentation process is difficult to start. During pre-processing, the moisture content of wet materials can be reduced by drying, or water or biogas slurry can be evenly sprayed onto dry materials to adjust the humidity, ensuring that the material can be formed into a ball when squeezed by hand and easily crumbles when released.

Furthermore, thoroughly remove impurities and foreign objects. If stones, metal parts, plastic films, and other impurities are mixed into the material, they will seriously damage the blades, tracks, and other key components of the windrow compost turner.  Undegradable impurities such as plastic films will also affect the quality of the final product. Therefore, impurities must be thoroughly removed through manual sorting and screening, with particular attention paid to checking for metal foreign objects to prevent equipment malfunctions.

Finally, optimize the uniformity of material mixing. For materials composed of multiple ingredients, thorough mixing is required during pretreatment to ensure uniform distribution of parameters such as the carbon-to-nitrogen ratio. Uneven mixing can lead to insufficient fermentation in certain areas, affecting the overall treatment effect. A mixer can be used to assist in the mixing process, ensuring uniform material composition and providing a guarantee for the stability of subsequent turning and fermentation.

In summary, material pretreatment is a prerequisite for the efficient operation of the windrow compost turning machine. Only by strictly controlling key aspects such as particle size, moisture content, impurity removal, and mixing uniformity can the equipment's efficiency be maximized, the quality of material processing be improved, and a solid foundation be laid for subsequent production.

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