Ventilation and Oxygen Supply - Manure composting is an important factor in the lack of air and oxygen. Wet Granulation Process, Rotary Drum Cooler, Vertical Crushing Machine, Electric Casssava Flour Package,Compost Turning Machine. Mechanical composter The product will supply to all over the world, such as Europe, America, Australia,Pretoria, Florence,Borussia Dortmund, Armenia.Disc granulator machine