The granulation process of the entire livestock and poultry manure organic fertilizer production line is a complex technological process involving multiple continuous steps, from raw material pretreatment to final product packaging. Here is a detailed overview of the general process:
1、 Raw material pretreatment stage
Collection and transportation: Collect and transport livestock manure from the farm to the pre-treatment area.
Solid liquid separation: If the raw material contains a large amount of water, solid-liquid separation is required. Common methods include screw presses or centrifugal dehydrators.
Drying: After solid-liquid separation, the raw materials need to be further dried to a suitable moisture content, usually using a dryer to facilitate subsequent crushing and mixing processes.
Crushing and screening: Use a grinder to grind the dried raw materials to a certain particle size, and then use a screening machine to remove oversized or ultra-fine particles to ensure uniform particle size of the raw materials.
2、 Mixing and Fermentation Stage
Raw material mixing: Accurately measure the crushed and screened animal manure with other organic materials (such as rice husks, straw, etc.) and auxiliary materials (such as adhesives, microbial preparations) according to the formula ratio, and send them to the mixer for uniform mixing.
Fermentation: The mixed raw materials enter the fermentation workshop or fermentation tank, and the fermentation process is initiated by adding specific fermentation strains. During this process, it is necessary to regularly flip or stir to ensure sufficient oxygen supply and temperature control, promote the biodegradation of organic matter, and reduce harmful substances.
3、 Granulation stage
Pre treatment before granulation: The fermented and matured materials are crushed again to ensure that all particle sizes are appropriate, and then sent to the pre conditioning equipment before the organic fertilizer granulator to adjust the material humidity to make it more suitable for granulation.
Granulation: Use specialized organic fertilizer granulators (such as extrusion granulators, drum granulators, disc granulators, etc.) to make pre treated materials into granules with certain hardness and stability. The pressure and temperature during the granulation process need to be strictly controlled to achieve the desired particle shape and size.
4、 Drying and cooling stage
Particle drying: Newly produced organic fertilizer particles usually contain high moisture content and need to be quickly dried to the target moisture content using an organic fertilizer dryer to prevent mold or spoilage during storage or transportation.
Cooling: After drying, the particles need to be quickly cooled to around room temperature to prevent mass changes caused by residual heat inside. This is usually achieved using a cooling machine.
5、 Screening and Grading Stage
Screening: Use vibrating screens or other types of screening equipment to screen the cooled particles according to their size. Unqualified large particles or powders will be reprocessed until they meet the standards.
Coating (optional): In order to improve the appearance quality and protective performance of the particles, some advanced organic fertilizers will apply a thin protective film on the outer surface of the particles.
6、 Packaging and Storage Stage
Quantitative packaging: Use an automatic packaging machine to package qualified organic fertilizer particles according to the specified weight, and then label them for easy sales and identification.
Finished product storage: Packaged organic fertilizers are stored in a dry, cool place, waiting for shipment or further distribution.
The granulation process of the entire livestock and poultry manure organic fertilizer production line covers the entire process from raw material pretreatment to finished product packaging, and each link needs to be carefully controlled to ensure that the final product meets the predetermined quality standards. In addition, considering environmental requirements, the production line should be equipped with corresponding waste gas treatment and wastewater purification devices to minimize the impact on the environment.