Flat sheet membrane filtration module with cylindrical housing

A membrane module comprising,

• a tubular housing with round cross section;
• a plurality of flat sheet membranes inside of the tubular housing;
• and,
• a layer of potting material on the inside of the tubular housing,
• wherein
• the flat sheet membranes are oriented parallel with a longitudinal central axis of the housing and edges of the plurality of flat sheet membranes are embedded in and rigidly, adhesively connected to the potting material;
• the potting material extends along the entire length of the flat sheet membranes;
• and
• the potting material has an essentially annular shape and an essentially constant thickness.