Dispersion characteristics of a rotating hollow fiber membrane bioreactor: Effects of module packing density and rotational frequency

摘要: The coupling of biological reactor with membrane dissolution processes has gained increasing attention in the wastewater treatment community because their effective delivery gaseous products and high efficiencies. Turbulent flow may be an important factor for optimizing performance these systems, both by reducing plug-flow conditions associated axial gradients within mass transfer across biofilm attached to fibers. While turbulence is typically enhanced via increased velocity, rotation membranes themselves alternative mechanism that might eliminate problems (e.g., shear, mal-distribution fluid flow). effects variable rotational frequencies (0, 5, 10 20 rpm) module packing densities (62, 82, 92%) on residence time distributions (RTD) curves a bromide tracer were investigated assess potential as means turbulence. resulting RTD compared dispersive model determine Peclet numbers (Pe) subsequent dispersion coefficients. These finding indicated observed frequency, density characteristics decreasing rotation. This study demonstrated can cause turbulent prompting allowing low operational rates reduction constraints bioreactors (MBR).