Friesland Brands B.v.

Albert Van Der Padt

Tjeerd Jongsma

Cornelis Petrus Jacobus Maria Van Der Vorst

Jantje Krompkamp

The invention relates to a filter assembly for membrane filtration&#x2014;of liquids, and more in particular a spiral wound filter assembly with improved filtration performance. Provided is a spiral wound filter assembly comprising a permeate channel () for transporting permeate to the permeate outlet (), said permeate channel being provided with at least one flow restriction () in form of check or control valves or ridges, for increasing the pressure in at least part of the permeate channel. The invention further relates to an apparatus comprising such a filter assembly, and to methods for using this apparatus.

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Apeldoorn, Netherlands

Albert Van Der Padt