Ventilation and Oxygen Supply - Manure composting is an important factor in the lack of air and oxygen. Bio Organic Fertilizer Production Line, Chain Crusher Machine, Drum Dryer Machine, Flat Die Extrusion Granulator,Wet Material Crusher. 3. Mixer equipment: horizontal mixer, disc mixer The product will supply to all over the world, such as Europe, America, Australia,Cairo, Burundi,Lahore, Sierra Leone.Manure pellet machine