Rotation Filtration

Rotation Filtration (Dynamic Cross-Flow-Filtration) provide maximum filter efficiency.

The cross flow effect (tangential flow cleaning of the filter surface) is generated by the rotating of the filter discs and not by pumping large volumes.  

  • extreme cross flow velocity (highly efficient cleaning of the filter surface)
  • very low energy consumption (compared to conventional cross flow techniques)
Comparison of Conventional and Dynamic Cross Flow Filtration
Comparison of filtration performance
Increased filtration capacity of the rotary filtration compared to conventional crossflow filtration and dead end filtration.
Filtration performance

Diagram Rotation Filtration

Rotating Ceramic Filter Discs are assembled in a pressurised housing. The design of the discs shows drainage channels in the inside. The filtrate is transported from the outside to the inside of the discs. The rotation of the discs generates shear forces on the membrane surface. With this technique an increase of a filter cake is avoided resulting in a high filtration flux.

Main Parameters

  • Rotation Speed (rotating Ceramic Filter Discs)
  • Transmembrane Pressure TMP (pressurised housing)
  • Solid Content (concentration of liquids due to the removal of filtrate)
Rotation Filtration Modul with Ceramic Filter Discs: Membrane Surface 35 m²
Rotation Filtration Modul with Ceramic Filter Discs: Membrane Surface 35 m²

Ceramic Filter Discs

Micro Filtration and Ultra Filtration

Ceramic Filter Disc 374

  • Diameter Øo 374 mm 
    Diameter Øi 91 mm
  • Thickness d = 6,0 mm
  • Membrane surface 0,20 m²
 

Ceramic Filter Disc 312

  • Diameter Øo 312 mm 
    Diameter Øi 91 mm
  • Thickness d = 6,0 mm
  • Membrane surface 0,14 m²
 

Ceramic Filter Disc 152

  • Diameter Øo 152 mm 
    Diameter Øi 25,5 mm
  • Thickness d = 4,5 mm
  • Membrane surface 360 cm²

Overview:

  • Filtration from outside to inside
  • Support: pore size 2,0 μm
  • Support coating with layers of lower pore size (micro filtration and ultra filtration)
  • Chemical and thermal resistance
  • Backflushing 

 Ceramic Filter Discs provide maximum process safety

  • Resistance to chemical and thermal stresses
  • High filtration flux and very long service life
  • Regeneration by backflushing or hot steam sterilization 

Kerafol® provides you with the necessary  parameters for installing the discs in your filtration plants (sealing, fixing, process parameters).

Contact

Do you have any questions, requests or suggestions? How can we help you?

Dipl. Phys. Christian Münch
Head of department Ceramic Filters
Phone+49 (0)9645 88 314
Fax+49 (0)9645 88 390
a