- Equipment for coating powder or liquid on the surface of fertilizer particles to realize the coating process. Powder Fertilizer Cooler, Extruder Granulator, Double Screw Compost Turner, Organic Disc Granulator,Fertilizer Drying Machine. The working principle of the composting machine is to biodecompose the organic matter in the wastes such as harmless organic sludge, kitchen waste, pig and cattle manure, etc., to achieve the purpose of harmless, stable and composting resources. The product will supply to all over the world, such as Europe, America, Australia,Benin, Porto,Holland, Las Vegas.Organic fertilizer granule making machine