Device for separating biologic-organic flow media with filter elements in the form of membrane cushions

A device for filtering and separating a flow medium by one of the methods selected from the group consisting of reverse osmosis, microfiltration, ultrafiltration, and nanofiltration, said device comprising:

• a pressure-tight housing having an inlet for the flow medium and a first outlet for the retentate and a second outlet for the permeate;
• a plurality of stacked units comprised of spaced apart membrane filter elements, wherein said membrane filter elements are stacked atop one another to form a stack;
• said stacked units sequentially arranged in said housing, wherein the flow medium flows in sequence through said stacked units;
• wherein each one of said membrane filter elements comprises a first and a second areal outer membrane elements and an inner areal stabilizing element positioned between said first and said second areal outer membrane elements;
• wherein for spacing said stacked membrane filter elements strip-shaped spacer elements are provided between neighboring ones of said membrane filter elements;
• and
• wherein each one of said stacked units further comprises a receptacle consisting of two receptacle parts for enclosing said stack of said membrane filter elements, said receptacle parts having a substantially semi-circular outer contour.