Intensification of biotechnological aerobic process of treatment of liquid substrates

Considered a device in the form of a conical surface rotating to improve the mass transfer between liquid and gas. Under the action of centrifugal force on the immersed surface of the cone forms a thin liquid pellicle, which forms a significant area of contact between the pellicle and gas phase. Found that the mass transfer between liquid and gas with addiction to oxygen depends on the speed of rotation of the cone and the depth of his immersion. Were calculated the specific energy consumption of the process. Investigated the characteristics the flow of pellicle  on the surface of the cone. It is established that with increasing speed the pellicle becomes continuous. The immersion depth of the cone significantly affects the angular velocity, which is necessary for the formation of a continuous film. The greater the immersion depth of the cone, the greater the angular velocity required. The obtained experimental data allow to make a good forecast of to use tapered aeration system  not only in the open, but also closed fermenters. The concentric arrangement of the cones of rotation will significantly increase the aeration efficiency of various environments, including wastewater. Reported the data regarding the formation of foam for a given embodiment of the device in comparison with a traditional of the fermenter. Conducted mathematical analysis of the common dependencies of the process of mass transfer between liquid and gas. A model is proposed which adequately reflects the essence of the process