University of Twente
Science and Technology
P.O. Box 217
7500 AE Enschede
Photocatalytic degradation of contaminants in water is considered as a viable method to remove micropollutants. Membrane filtration results in accumulation of retained species at the membrane surface, known as concentration polarization. The concentration polarization is the cause of the limiting flux, as back-diffusion is then balanced by the convective permeation rate. When the limiting flux is reached, further pressure increase will not result in significant flux increase, as the accumulation layer is growing at this stage. As such, it is important to reduce concentration polarization as this directly results in improved flux, or production, of purified water. A reactive membrane is expected to reduce the concentration polarization via the chemical conversion (oxidation) of contaminants.
In this MSc project, we propose to study the photocatalytic membrane process first in dead-end mode, accompanied by a 1-D numerical (or analytical) model. We will study the influence of operation parameters, like permeation velocity and light intensity, and materials characteristics, like pore size and membrane thickness, on the contaminant degradation performance. Th practical work includes the design and fabrication of a membrane reactor module as well as the experimental study of mentioned parameters.