Microbial fermentation tank for defoaming by using sawteeth

The microbial fermentation tank comprises a tank body and a tank cover covering an opening in the top end of the tank body, a rotating shaft is arranged in the center of the tank cover in a penetrating mode, the rotating shaft and the tank cover are in running fit, and a plurality of turbines which are sequentially distributed from top to bottom are arranged on the rotating shaft in a sleeved mode. A plurality of blades extending outwards are formed on the periphery of the turbine, and the blade of the turbine located at the uppermost end comprises a sawtooth part. Compared with the prior art, bubbles on the surface layer of a sample can be reduced in the stirring process, and the reaction and fermentation performance of the fermentation tank can be improved. 本实用新型公开了一种利用锯齿消泡的微生物发酵罐，其包括有罐体和盖合于所述罐体顶端开口处的罐盖，所述罐盖的中心处穿设有转轴且二者转动配合，所述转轴上套设有由上至下依次分布的多个涡轮，所述涡轮的周围形成有多个向外延伸的叶片，位于最上端的所述涡轮的叶片包括有锯齿部。相比现有技术而言，本实用新型能够在搅动过程中消减试样表层的气泡，有助于提高发酵罐的反应、发酵性能。