Membranes made of high-performance and standard polymers for wet separation processes

At the TITK, membranes made of high-performance and standard polymers with new properties can be researched on a laboratory scale. Furthermore, the TITK offers support in the development and realisation of application possibilities close to industry. Here, the competences are based on work on wet separation processes such as reverse osmosis, nanofiltration, ultrafiltration and microfiltration.

• Development of polymer membranes with the property combinations you require in terms of
  • permeability,
  • molecular exclusion limits,
  • retention capacity etc.
• Membrane quality assurance
• Optimisation of membrane separation processes

• Medium-dependent process analysis using different membrane types and operating conditions
• Process optimisation

• Permeability
  • Permeate volume flow
  • Permeate quality
  • Water permeability
• Molecular exclusion limits (MWCO)
• Retention capacity for dissolved substances and particles
• Separation curve determination

• Reference and comparison measurements

Membrane test stand

• Operating pressure: adjustable up to 60 bar independently of the overflow
• Pressure build-up: Triple diaphragm high-pressure pump; frequency-controlled
• Flow guidance: cross-flow
• Flow meter: max. 1,200 l/h
• Separation cell: for flat diaphragm Ø 90 mm
• Special features: mobile version; on-site use on request

The test stand enables testing of different membrane types and medium-dependent optimisation of the operating parameters in cross-flow membrane processes. Thanks to the specially designed flow channel, the crossflow velocities can be set reproducibly. The operating pressure can be up to 60 bar regardless of the selected crossflow speed and thus allows optimisation of all membrane processes in UO, NF, UF and MF.