Save on equipment such as air compressors, coolers, oil-water separators, air storage tanks, and main filters in the air purification system, reducing the factory's floor space. Decrease factory fermentation equipment investment by approximately 30%. For example, when using self-priming fermenters to produce yeast, the yield per liter of volume can reach as high as 30–50 grams. The equipment is automated and continuous, reducing labor intensity and workforce requirements. Yeast fermentation has a short cycle, with high yeast concentration in the fermentation broth and minimal waste liquid after yeast separation. The equipment has a simple structure, high oxygen dissolution efficiency, and is easy to operate.