Small-scale organic fertilizer production lines are suitable for livestock farms, villages, and small fertilizer processing plants, featuring low investment, simple operation, and quick results. The entire production process is complete and moderately automated, enabling the harmless treatment and resource utilization of agricultural waste such as livestock manure and straw. The small-scale production line mainly includes six production stages: raw material pretreatment, fermentation and composting, crushing and screening, granulation, drying and cooling, and packaging and warehousing.
The first step is raw material pretreatment. Before production, livestock manure such as chicken, cow, and sheep manure is mixed with auxiliary materials such as straw and sawdust in a certain proportion, adjusting the carbon-nitrogen ratio and moisture content of the materials. Large pieces of raw material are crushed using a small crusher to remove impurities such as plastic and stones, ensuring uniform material size and good aeration, creating stable conditions for subsequent fermentation.
The second step is composting and composting, which is also the most critical stage of production. Small-scale production lines often use windrow fermentation, combined with a windrow compost turning machine to periodically turn the compost for oxygen supply. The material undergoes high-temperature fermentation to kill insect eggs, pathogens, and weed seeds, gradually eliminating the fishy odor. After about twenty days of composting and settling, the material turns dark brown and becomes loose in texture, meeting the standards for safe organic fertilizer composting.
The third step is crushing and screening. A small amount of clumps remain after composting, requiring further crushing and finer processing before being sent to a screening machine for grading. This removes large particles and incompletely composted impurities, leaving fine and pure organic fertilizer raw materials, effectively improving the appearance and quality of the finished product.
The fourth step is granulation. For granular organic fertilizer production, the screened fine powder is fed into a mixer for uniform mixing, and then granulated into uniform particles using a disc granulator. Granular fertilizer is less prone to dust generation, easier to transport and apply, and more suitable for market sales, making it the mainstream processing method for small-scale production lines.
The fifth step is drying, cooling, and screening. The freshly formed particles have high moisture content and need to be dried using a drying machine, then cooled to prevent mold and clumping. Finally, they are finely screened again to ensure uniform particle size.
The final step is automatic packaging and warehousing. Qualified finished products are automatically weighed, sealed, and packaged by a packaging machine, completing the entire production process. The small-scale organic fertilizer production line has a simple and practical process, which can solve the problem of pollution from livestock farming and produce high-quality ecological organic fertilizer, making it very suitable for small-scale production in rural areas.
