4. Municipal waste
Kitchen waste: Fruit and vegetable waste, etc., must be sorted and aged before use.
Sludge: Sludge from sewage treatment plants can be made into an amendment after treatment.
5. Other Raw Materials
Lignite : Lignite containing humic acid can be used directly in organic fertilizer production.
Vermicompost : Fertilizer produced by earthworms processing organic waste, rich in microorganisms and organic matter.
The above raw materials undergo fermentation and drying processes to be made into granular fertilizers, which improve soil structure and slowly release nutrients.
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