Element for separating a liquid medium with high parietal shear stress

An element for separating a liquid medium into a permeate and a retentate, comprising:

• an inorganic one-piece rigid porous support (2) having, on one side, a first outer planar surface (3) and, on an opposite side, a second outer planar surface (4) connected to the first outer planar surface by at least one outer connecting surface (5);
• at least one series of at least two circulation ducts (6) for the liquid medium that are formed in the porous support so as to each have a rectangular cross section defined by two long sides parallel to each other and two short sides parallel to each other;
• at least one internal connection system for the distribution (10) of the liquid medium, arranged in the porous support to distribute from an inlet (11) formed in the porous support, the liquid medium, in a series of at least two circulation ducts, and at least one internal connection system for the collection (12) of the retentate, arranged in the porous support to collect up to an outlet (13) formed in the porous support, the retentate coming from the series of at least two circulation ducts, the internal connection system for the distribution (10), the circulation ducts (6) and the internal connection system for the collection (12) being provided with at least one separating layer continuously deposited between the inlet (11) and the outlet (13) of the porous support so that the liquid medium circulating in the porous support between the inlet and the outlet is only in contact with said separating layer, the porous support (2) having a continuity of material and of porous texture and a mechanical strength allowing to prevent the breaking of the porous support for a pressure difference of the liquid medium of at least one bar between the separating layer and the outlet surface of the permeate;
• and
• a collection system (7) for the permeate that has passed through the separating layer or layers.