期刊
BIOCHEMICAL ENGINEERING JOURNAL
卷 200, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.bej.2023.109076
关键词
Rotating biological contactor (RBC); Bacterial cellulose (BC); Mathematical modeling and simulation; Oxygen mass transfer
The Rotary Biological Contact (RBC) reactor has a unique aeration system that overcomes the limitations of stationary culture in bacterial cellulose (BC) production. In this study, a mathematical model based on one-dimensional oxygen mass transfer was used to simulate the RBC bioreactor producing BC. Sensitivity analysis was performed to investigate the effect of different system parameters. The simulation results showed that the increase in angular velocity and immersion depth positively affected the oxygen transfer coefficient and mass transfer rate.
The Rotary Biological Contact (RBC) reactor has a unique aeration system that provides a moving bed for easy and efficient oxygen transfer within the system to overcome the limitations of stationary culture in bacterial cellulose (BC) production. In most cases, oxygen mass transfer is the limiting factor of an aerobic process, hence the changes in the oxygen mass transfer coefficient within the system have been given special attention. In this study, the RBC bioreactor producing BC was modeled based on one-dimensional oxygen mass transfer in the direction perpendicular to the surface of the discs. The Monod kinetic model has been used to express cell growth. Simulation of the mathematical model was done based on the numerical solution with finite difference method in MATLAB software. Sensitivity analysis was performed to investigate the effect of changing different system parameters in RBC modeling. The simulation results showed that with the increase in angular velocity, the oxygen transfer coefficient and subsequently the mass transfer rate increase. Also, at a certain angular velocity, the oxygen mass transfer coefficient increases with the increase of immersion depth. The best disk rotation speed considering other parameters as well as the laboratory results was 13 rpm with a 45% indentation percentage and the optimal distance between the disks was 1.5 cm.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据