The uses of membranes for the filtration of beverages are well accepted today. With this, wine clarification by microfiltration has rapidly grown in recent decades.
However, it is well-known from most of the applications of membranes in fluid filtration that fouling of the membrane surface is the reason for a major loss of membrane permeability and, therefore, of volume through put. The key to success in the clarification of wine is the membrane selection with regard to fouling behavior and the specific membrane surface area respective of pore size.
Higher through put and longer service life
Field test results demonstrate this finding in a direct comparison of two microfiltration membranes with 0.2 µm nominal pore size made from either polyethersulfone (PES) based polymers or polypropylene (PP). When filtering the same white wine, the Liqui-Flux® filtration modules, using Membrana’s unique Accurel® PP hollow fiber membrane, revealed a much higher through put and service life compared to modules utilizing PES membranes.