Abstract
Effect of turbulence of water on the performance of hollowfiber membrane modules wereinvestigated under both steady flow and oscillating flow conditions. Hollowfiber membrane module end of the fiber fixed to a plate and with the other side kept free in flow, so that it resembles aquatic plants.Two open channels, one is for steady flow condition and theother is for oscillatory flow condition, were prepared, in which the membrane modules were submerged and suspended from the top. Velocity and turbulence near the modules was measuredby a Laser Doppler Velocimeter. Kaoline was mixed in the channel water and increase of filtration registance of membrane was measured in both of the conditions of flow. The increase of the registance was slower in higher turbulence condition, which suggests the importance of turbulence of water for removing accumulated particles from membrane under both steady flow and oscillating flow conditions.
