Ventilation and Oxygen Supply - Manure composting is an important factor in the lack of air and oxygen. Patient Gowns Disposables, Lead-Free Steam Indicator Tapes , Type 4 Chemical Indicator, Steam Sterilization Strips ,Sterile Indicator . 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,Latvia, Sweden,Toronto, Cyprus.Fertilizer blender