Sterile aerobic fermentation tank

The utility model relates to the technical field of microbial fermentation equipment, in particular to a sterile aerobic fermentation tank which comprises a primary fermentation tank and a secondary fermentation tank, the first-stage fermentation tank is mounted above the second-stage fermentation tank, and the steam inlet pipe A is communicated with the first-stage fermentation tank and is communicated with the second-stage fermentation tank through the volume transfer pipe at the bottom of the first-stage fermentation tank, so that high-temperature sterilization of the whole system can be realized, and sterile transfer of fermentation liquor between tank bodies is realized; air sterilization filter elements are mounted on air inlet pipes of the first-stage fermentation tank and the second-stage fermentation tank, so that the possibility of introducing infectious microbes is further reduced. According to the utility model, multiple stages of fermentation tanks with different volumes are arranged, sterilizati