Coarse finished products are a common problem in organic fertilizer production. They not only affect the product's appearance but can also reduce fertilizer efficiency, impact user experience, and cause economic losses for production enterprises. Coarse finished products are mainly characterized by uneven particle size, rough surfaces, impurities, and a tendency to clump. Their causes are closely related to raw material processing, fermentation technology, and processing steps, requiring targeted measures for effective improvement.
Inadequate raw material processing is the primary cause of coarse finished products. If the raw material particle size is insufficient, and materials such as straw and livestock manure are not sufficiently refined, it is difficult to form uniform particles after fermentation, resulting in large impurities in the finished product. Therefore, it is necessary to optimize the raw material pretreatment process, selecting appropriate crushing equipment to crush fibrous raw materials such as straw and weeds to at least 20 mesh. Livestock manure should be crushed after passing through a solid-liquid separator to ensure uniform particle size, laying the foundation for subsequent processing.
An unreasonable fermentation process can also exacerbate coarse finished products. Insufficient fermentation results in undecomposed organic matter forming hard lumps, while over-fermentation leads to loose and brittle material, both affecting the quality of the finished product. Strict control of fermentation parameters is crucial during production. The carbon-to-nitrogen ratio of the material must be adjusted to between 25:1 and 30:1, the fermentation temperature maintained at 55-65℃, and continuous turning and aeration provided to ensure thorough fermentation. After fermentation, the material must be fully decomposed to prevent undecomposed material from contaminating the finished product.
Improper operation in subsequent processing stages is a direct cause of infertility. In the granulation stage, insufficient binder addition and improper granulator speed can lead to poor granule formation and rough surfaces. Excessively high or low temperatures during drying can cause granules to crack and clump. Improper selection of screen mesh size during sieving can result in uneven particle size. Appropriate binder addition, adjustment of granulator speed and pressure, control of drying temperature at 60-80℃, selection of suitable screens, and graded screening of the finished product are necessary to remove impurities and substandard particles.
Furthermore, comprehensive quality control is essential throughout the organic fertilizer production process. Regular checks of raw material particle size, fermentation status, and processing parameters are required, with timely adjustments and optimizations. By properly controlling key processes such as raw material pretreatment, fermentation, granulation, and drying, the problem of rough organic fertilizer products can be effectively solved, producing high-quality organic fertilizer with uniform particle size, smooth surface, and stable fertilizer effect.
