Scientists at the Fraunhofer IGB have developed a rotating disk filter, which efficiently controls the thickness of the particle layer formed during filtration by rotation of its filter disks. Hereby, the filter opens up new applications for membrane filtration such as industrial and municipal wastewater treatment.
The membrane disks of the rotating disk filter are preferably made of ceramic material. Ceramic material is characterized by high specific filtrate fluxes and good cleanability.
Scientists at the Fraunhofer IGB have developed a rotating disk filter, which efficiently controls the thickness of the particle layer formed during filtration by rotation of its filter disks. Hereby, the filter opens up new applications for membrane filtration such as industrial and municipal wastewater treatment.
The membrane disks of the rotating disk filter are preferably made of ceramic material. Ceramic material is characterized by high specific filtrate fluxes and good cleanability.
The rotating disk filter is a dynamic membrane filter consisting of a cylindrical housing, in which a stack of membrane disks is attached to a rotating hollow shaft. By applying a slight overpressure of 0.2 to 1.5 bar the filtrate passes through the separation layer on the membrane disk outside in and is drawn off via or along the hollow shaft.
The particle layer on the membranes is controlled by means of the centrifugal force field created. This enables the laminar particle layer – adhering on the filter disk and thereby rotating together with the disks – to flow off. Thus, the particle layer is continuously renewed. By avoiding of turbulences, energy consumption of the rotating disk filter is low.
The rotating disk filter proofed successfully in:
Further applications are:
Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB