Organic fertilizer classification and commercial fertilizer manufacturing process
According to the organic fertilizer manufacturing process, the source and mode of raw materials, it can be divided into compost, waterlogged compost, barnyard manure, biogas fertilizer, green manure, straw fertilizer, and other organic fertilizers.
1 Compost refers to an organic fertilizer that is produced by mixing crops such as crop straw, farm manure and animal carcasses, rice husks and grasses, and a small amount of soil.
2 The difference between waterlogged compost and compost is that the manure is fermented under the flooding conditions to produce organic fertilizer, and the raw materials used are the same as compost.
3 The raw materials used for barnyard manure are pigs, cattle, horses, sheep, chickens, ducks and other livestock and poultry excrement and litter in the pens. These materials are piled up to make fertilizer.
4 The source of biogas fertilizer raw materials is consistent with compost. The process is anaerobic fermentation to produce biogas, and the remaining biogas slurry and residue are by-products of biogas production.
5 Green manure is the use of green plants as fertilizer.
6 The raw materials of straw fertilizer include crops such as corn and rice. Under suitable conditions, the elements in the straw are mineralized back into the soil through the action of soil microorganisms, and are reused for crops.
7 Other organic fertilizers such as rapeseed cake, cottonseed cake, bean cake, sesame cake, ramie cake, tea seed cake and uncontaminated river mud, pond mud, ditch mud, port mud, lake mud and so on.
Commercial Fertilizer Manufacturing Process
The commercial organic fertilizer is finished by the above-mentioned compost, waterlogged compost, barnyard manure, green manure, straw fertilizer and other fermented and fermented fertilizers. The commercial organic fertilizer manufacturing process is divided into compost crushing, raw material mixing, granulating, drying and screening. Compared with NPK fertilizer production, the manufacturing process is based on the organic matter fermented by waste such as fecal straw, supplemented by a small amount of other nutrients, and finally made into granular fertilizer, so that the fertilizer effect can be slowly released.