BACKGROUND Membrane bioreactor (MBR) applications have been limited by high cost of membrane modules and fouling problems. Dynamic membrane (DM) technology can be a solution for these problems. Low-cost filters can be used as support materials for dynamic (cake) layer formation. The characteristics of support material play an important role on dynamic layer formation behavior. Therefore, the aim of this study was to investigate the impact of support material type on dynamic membrane bioreactor (DMBR) performance for municipal wastewater treatment. Hollow fiber support materials, made of polyester fabrics and glass fiber materials, were used for DM formation.