| Popis: |
In this communication, we reviewed various dynamic filtration (DF) modules and their hydrodynamics and applications in wastewater treatment. Firstly, the configuration, operation parameter, and antifouling capacity for different dynamic filtration modules including rotating disk/rotor, rotating membrane, and vibratory systems were introduced. However, local hydrodynamics which could better diagnose the filtration performance were often neglected by the lack of knowledge on local measurement. To complete the knowledge on hydrodynamics, experiments were thus carried out by particle image velocimetry (PIV) technique. The velocity field and velocity profile were presented. Computational fluid dynamics (CFD) simulation was developed with the same working condition as PIV experiments and further discussed the velocity field. Moreover, the applications of dynamic filtration for water treatment were also evaluated. In the food processing wastewater treatment, dynamic filtration exhibited the high membrane permeability and excellent antifouling capacity at 12 times protein concentration process; afterwards most proteins in wastewater was recycled. This work provides guidance for the hydrodynamic mechanism and application in terms of dynamic filtration. |
