Ventilation and Oxygen Supply - Manure composting is an important factor in the lack of air and oxygen. 600×900 Jaw Crusher, China Rotary Dryer, Fertilizer Crusher Machine, Feed Pellet Cooler,Spiral Conveyor. Compost turning The product will supply to all over the world, such as Europe, America, Australia,Johor, Moscow,Libya, French.The fertilizer mixer is an essential and important equipment in the biological fermentation tank. Different slurry type mixers are selected in the biological fermentation tank to make each area in the tank meet the requirements of gas-liquid dispersion, solid-liquid suspension, mixing, heat transfer, etc. Fermentation yield, reduce energy consumption.