Organic fertilizer production and application methods：
There are big differences in the production and application methods of organic fertilizers in the world. The common practice abroad is to use a special fertilizer spreader to spread the finished compost directly to the planting plots. The reason is that the farm itself has a compost site and a large area of planting land attached to it. Small-scale self-circulation of planting materials can be realized.
Based on technical research and engineering practice experience in processing organic solid waste to produce organic fertilizers, the following organic fertilizer production process system is proposed, which includes an aerobic compost fermentation process and an organic fertilizer fertilization process.
Fertilizer making process:
The fertilizer production process mainly includes crushing, batching, mixing, granulating, drying, cooling, screening and packaging. Key elements for making fertilizer: formula, granulation, and drying.
1. Organic fertilizer processing
Use compost as organic raw material to blend nitrogen, phosphorus, potassium and medium and trace elements.
Product appearance processing: powder——particle size and uniformity, particles——round or columnar.
2. Organic-inorganic compound fertilizer processing
Features: Use compost as organic raw material, use inorganic nitrogen, phosphorus, and potassium products as the main nutrient sources, draw lessons from the compound fertilizer production model, and combine the fertilizer demand characteristics of crops to produce a combination of organic and inorganic fertilizers, which can provide both urgent and urgent fertilizer effects. A quick-acting and long-acting fertilizer that can effectively improve soil.
Variety: organic-inorganic compound fertilizer, high-nutrient compound microbial fertilizer.
3. Bio-organic fertilizer processing
Description of the fertilizer making process: First, the fermented compost products are sent to the organic fertilizer production system. They are first screened, and the sieved products are returned to the pretreatment process section and fermented again. The qualified products are crushed, measured, batched, and mixed to form powder. If the organic fertilizer is not granulated, it can be packaged directly, and the finished product will be transported to the finished product warehouse for sale; if it is to be granulated, it will be granulated in the granulation system, qualified products will be sorted, and then packaged, and the finished product will be transported to the finished product warehouse for sale.
The characteristics of this fertilizer making process can be summarized as follows: the process layout adopts modular combination and automatic control, and can produce powdered organic fertilizer, granular organic fertilizer, powdered bio-organic fertilizer, and granular bio-organic fertilizer according to market demand; the speed can be adjusted evenly On the basis of feeding, it can realize one-stop continuous operations such as continuous crushing, continuous batching, continuous granulation, continuous drying and cooling, continuous screening and packaging.
Process flow：
The process flow of producing fertilizer from livestock and poultry manure is shown in the figure below
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