Xiaohan SUN, Chunqing LI, Xiangning Chen


Membrane bioreactor (MBR) has been successfully applied to biological wastewater treatment, which solves the long-term problem of effective solid-liquid separation and separation. MBR optimization requires knowledge of membrane fouling, mixing, and biomechanics. The MBR is designed primarily for biodynamic and membrane fouling considerations, and fluid dynamics within the system is critical to the performance of the system. Computational fluid dynamics (CFD) provides a method for simulating and predicting MBR. In this paper, the simulation software (Ansys Fluent) was used to establish a membrane bioreactor model with hollow fiber as the membrane component, and the relationship between inlet velocity, the height of membrane bioreactor and water yield was studied. The hollow fiber membrane filaments with a vertical tangential arrangement were taken as the research object. By optimizing the MBR condition setting, it is concluded that when the inlet velocity and the height of the model are 1:20, the water production effect is the best and the water in the model is the least.


CFD; Computational fluid dynamics; MBR; Membrane bioreactor;

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