What are the steps in the production process of bio-organic fertilizer?

Bio-organic fertilizer is an environmentally friendly fertilizer that combines organic nutrients and biological activity. It uses organic waste such as livestock and poultry manure and crop straw as raw materials, and through scientific processing, it achieves resource utilization of waste while providing high-quality nutrients for crops and improving the soil environment. Bio-organic fertilizer production relies on a standardized process, with each step interconnected. The core process can be divided into four key steps: raw material pretreatment, microbial fermentation, post-processing, and quality inspection and packaging. Each step is closely linked and determines product quality. The bio-organic fertilizer production line is a crucial support for ensuring the efficient operation of the process.

Raw material pretreatment is the foundation of production and directly affects fermentation efficiency. First, raw materials free from mold and harmful substances are screened, and impurities such as plastics and metals are removed. Then, straw and manure are crushed to a suitable particle size using a crusher to increase the contact area with microorganisms. Next, the raw materials and auxiliary materials are mixed in a specific ratio, adjusting the carbon-to-nitrogen ratio to 25:1-30:1, while controlling the moisture content at 55%-65%. This creates a suitable environment for microbial reproduction, and this step is a critical prerequisite for avoiding fermentation failure.

Microbial fermentation is the core step, aiming to achieve the harmlessness and maturity of raw materials. The pre-treated materials are piled into windrows or sent to fermentation tanks, inoculated with functional microbial agents such as Bacillus subtilis, and regularly turned using a compost turning machine to supply oxygen. The pile temperature is controlled at 55-65℃ and maintained for more than 5 days, which not only rapidly decomposes organic matter but also kills pathogens and insect eggs. The entire fermentation process takes approximately 7-15 days, requiring real-time monitoring of temperature and humidity and timely adjustment of the turning frequency. After fermentation, the material needs to be aged for 7 days to ensure thorough maturity.

Post-processing determines the product form and ease of use. The matured material is further crushed and sieved to remove unfermented impurities, achieving a powder fineness of at least 80 mesh. For granular fertilizer production, the moisture content needs to be adjusted first, followed by granulation using a granulator. After drying and cooling, the granules are sieved, and substandard granules are recycled for reprocessing. Coating can be used to improve moisture resistance. Finally, functional microbial agents are precisely inoculated to ensure the required number of live bacteria.

Quality inspection and packaging are the final guarantee for the product leaving the factory. The finished product is sampled and tested to verify indicators such as organic matter content, viable bacteria count, and moisture content, ensuring compliance with relevant national standards. After passing the tests, it is quantitatively packaged using an automatic packaging machine, with relevant information labeled, and stored in a cool, dry place to prevent the microbial agent from becoming inactive. This process not only achieves environmentally friendly treatment of organic waste but also produces highly efficient and safe fertilizer, contributing to the development of green agriculture.

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