The standardized operation of the organic fertilizer production line directly determines product quality, production efficiency, and environmental compliance. Controlling each stage is crucial for a smooth organic fertilizer production process, producing high-quality organic fertilizer, and contributing to green agricultural development. The following are the key considerations during the processing.
Raw material selection is a fundamental prerequisite. Strict control of raw material sources is necessary, prioritizing the selection of organic materials such as livestock and poultry manure, straw, and fungal residue that have passed initial screening for maturity. It is essential to prevent the inclusion of raw materials with excessive heavy metals, pest eggs, or toxic and harmful substances. The moisture content of the raw materials should be controlled at 55%-65%. Too high a moisture content can lead to anaerobic fermentation and spoilage, while too low a moisture content affects microbial activity. Adjustments should be made promptly through drying or adding water.
Fermentation and maturation are the core stages. During the fermentation stage, the material's aeration must be ensured. Regular turning of the compost pile using compost turning equipment is necessary to maintain the pile temperature at 55-65℃ for 5-7 days, achieving sterilization, pest control, and organic matter decomposition. The carbon-nitrogen ratio should be precisely controlled at 25:1-30:1. This can be adjusted by adding straw to regulate carbon content and urea to supplement nitrogen content, preventing imbalances that affect fermentation efficiency. After fermentation, the pH value of the material should be tested to ensure it is within the suitable range of 6.5-8.5.
Precise control of the production process is essential. The crushing stage should ensure uniform particle size, generally controlled at 2-5 millimeters, facilitating subsequent granulation and crop absorption; during granulation, the amount of binder should be adjusted to ensure moderate particle strength and prevent disintegration. Equipment maintenance is also crucial; regular checks of the operating status of key equipment such as crushers and granulators are necessary to avoid mechanical failures that affect production continuity.
Product testing and environmental compliance cannot be ignored. The finished product must be tested for indicators such as organic matter content, total nitrogen, phosphorus, and potassium content, and heavy metal content to ensure compliance with national standards. The production process should include supporting equipment for exhaust gas treatment, wastewater collection, and solid waste recycling to prevent odor diffusion and pollutant emissions, achieving clean production.
