Ceramic membranes are operated in the crossflow filtration mode, a continuous process in which the feed stream flows parallel (tangential) to the membrane filtration surface and generates the two outgoing streams. This mode has the benefit of maintaining a high filtration rate for membrane filters compared with the direct flow filtration mode of conventional filters.
The Star-Sep™ membrane filter has been specifically developed for efficient crossflow microfiltration. The filter channel’s unique ‘star’ form increases the filtration area and induces turbulence at lower crossflow velocities. Not only does this lower the volume compared with a circular channel of the same diameter, but also results in a reduction of the pumping energy requirement. The cost effectiveness of the process is therefore substantially improved.