Airlift fermenter is also the most widely used biological reaction equipment, which has the advantages of simple structure, not easy to contaminate bacteria, high dissolved oxygen efficiency, and low energy consumption. There are many types of air-lift fermenters, the common ones are air-lift circulation, bubbling, air jet, etc. The air-lift fermenters that have been widely used in the biological industry include air-lift inner circulation fermenters, gas-liquid double jets, etc. Airlift circulating fermenter, tower type airlift fermenter with multi-layer distribution plate. The airlift bioreactor system suitable for the cultivation of microorganisms that require small shear force, built-in diversion tube to force the culture medium to flow up and down, and a special space distributor.