Converting cow manure into granular organic fertilizer usually requires the use of a complete organic fertilizer production line, which includes multiple steps aimed at transforming raw cow manure into nutrient rich and stable granular fertilizer. The following is the specific processing flow and the main equipment required:
Collection and pretreatment of cow manure
Firstly, collect fresh or slightly dried cow manure from pastures or farms. Subsequently, preliminary screening and crushing are carried out to remove large debris and coarse hard objects, ensuring the smooth operation of subsequent processing machinery.
Solid-liquid separation
If the moisture content of cow manure is high, solid-liquid separation should be carried out first. This step can be carried out by using a screw extruder or centrifugal dewatering machine, with the aim of reducing the moisture content of cow manure for subsequent fermentation and granulation processes..jpg)
fermentation
This is one of the most critical steps, which involves adding appropriate microbial fermentation agents and placing cow manure into a fermentation tank or using a trough type turner for dynamic fermentation. This process converts organic matter in cow manure into easily absorbable forms, eliminates pathogens and weed seeds, and generates beneficial microbial communities. The fermentation time is generally several weeks, depending on the environmental conditions and fermentation technology.
smash
After fermentation, the cow manure is sent to an organic fertilizer grinder for crushing, which facilitates subsequent mixing and granulation. Common crushing equipment includes chain crushers, cage crushers, etc., which can crush fermented cow manure to a particle size suitable for granulation.
blend
In order to adjust the nutritional composition and improve the physical properties, it is necessary to add other organic matter or minerals, as well as trace elements, to the ground cow manure. Use a mixer to evenly mix these ingredients, ensuring consistency in the quality of each batch of fertilizer.
Granulation
Use an organic fertilizer granulator to process the mixed material into granules. There are various types of granulators, including drum granulators, disc granulators, and flat die granulators. The choice of type of granulator depends on factors such as raw material characteristics, required particle shape and size.
Drying and Cooling
Newly granulated fertilizers often have high humidity and need to be dried to the appropriate moisture content using a dryer. Then, the granules are cooled down using a cooling machine to prevent clumping and spoilage.
Screening and coating
Finally, use a screening machine to classify the particles by size, and any unqualified particles will be reprocessed. For some high-end products, a coating machine can also be used to cover a layer of film on the surface of the particles to improve the waterproof and slow-release effect of the fertilizer.
packing
Qualified organic fertilizer particles are weighed, packaged, labeled, and ready for sale using an automatic quantitative packaging machine.
Throughout the entire production process, it is also necessary to pay attention to environmental issues, such as installing dust removal equipment to reduce dust pollution, and treating wastewater generated during the production process with a wastewater treatment system to ensure the environmental compliance of the entire production line. Through the above steps, seemingly insignificant cow manure has been transformed into organic fertilizers with commercial value, which not only improves resource utilization but also promotes sustainable agricultural development.
