What is the process of bio organic fertilizer production?

In the wave of green agricultural development, bio-organic fertilizer production lines have become a crucial link between agricultural waste and ecological planting. This production line uses agricultural waste such as livestock and poultry manure, straw, and mushroom residue as raw materials, transforming "pollutants" into high-quality fertilizer rich in microorganisms and organic matter through scientific processes. The entire process can be divided into four core stages: raw material processing, high-temperature fermentation, fine processing, and finished product processing.

The raw material processing stage is the starting point for quality control. Workers first mix collected livestock and poultry manure with crushed straw in a 3:1 ratio, using a drum screener to remove impurities such as gravel and plastic. Then, a mixer adjusts the material's moisture content to around 60%—this humidity level is the "gold standard" for microbial activity. Simultaneously, technicians add a composting agent to provide "microbial power" for subsequent fermentation, ensuring efficient decomposition of organic matter.

The high-temperature fermentation stage is the "core reactor" of the production line. The mixed raw materials are fed into a trough-type  turner, which turns the material 2-3 times daily. This not only replenishes oxygen but also evenly distributes the heat generated during fermentation, stabilizing the material temperature at 55-65℃. This temperature range kills harmful substances such as insect eggs and pathogens while promoting the proliferation of beneficial microorganisms like actinomycetes and Bacillus. After 15-20 days of composting, the raw materials transform from dark brown wet material into loose brown material, completing their initial transformation.

The fine processing stage determines the final form of the fertilizer. The composted material undergoes secondary crushing in a vertical mill to achieve a fineness of 80 mesh before entering a granulator. Depending on market demand, either disc granulation or extrusion granulation can be used to produce granules with a diameter of 2-4 mm. The granules then pass through a drum fertilizer dryer to remove excess moisture and are cooled to room temperature in a cooler to prevent microbial inactivation due to high temperatures.

The finished product processing stage safeguards the fertilizer's quality. After cooling, the granules are first screened by a vibrating screen to separate out substandard fragments for reprocessing. Qualified granules then enter a coating machine to be coated with an anti-caking agent and trace elements, improving the fertilizer's storability and nutritional completeness. Finally, an automatic packaging machine packages them into 25 kg or 50 kg packages, labels them, and then they are stored for shipment, ultimately reaching the farmland to revitalize the soil.

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