Application Highlight: How to Make Wine Filtration Testing Problem-Free

During the sterile filtration process, some wines can be problematic. They have the potential to clog filtration membranes with particulates (microbes, crystals) or associative/macromolecular colloids. Filterability testing is used to identify these potentially problematic wines, measuring particulates and colloid particles in contrast to light-scattering techniques such as turbidity, which only measures membrane-clogging particulates. 

Sartorius offers an integrated system including a stainless-steel tank, valves, filter holder and pressure regulator and a Cubis® II MCA precision balance with the Filterability Index software application. The software continuously measures filtered volume and time and according to the French method calculates the Filterability Index (IF), modified Filterability Index (IFM) and Vmax or according to the Italian method calculates the Clogging Index (CI), modified Clogging Index (MCI) and Vmax2. Learn about how Sartorius can assist your filterability testing by downloading this handy application highlight. 

Commonly Asked Questions:  

  • Which microbes are commonly problematic during wine filtration?
    • When dealing with wine filtration, problem microbes are usually yeasts (kloeckera apiculata, Zygosaccharomyces bailii, etc.) or bacteria (pediococcus, lactobacillus, etc.) 
  • What are common crystalline particulates in wine? 
    • ​​​​​​​Common crystalline particulates found in wine prior to filtration include calcium and potassium bitartrate.  
  • ​​​​​​​What are common colloidal or amorphous particulates in wine? 
    • ​​​​​​​Other particulates found in wine prior to filtration include silt, metal complexes, tannins, residual grape matter and polysaccharides.  

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