A filter structure (100) for separating water from a fluid, the filter (100) comprising an absorbent filter membrane (2) constituted by a non-woven textile (20), wherein the non-woven textile (20) is constituted by a bearing lattice (21) and by a super-absorbent material (22), which expands when it absorbs water, fixed to the bearing lattice (21), wherein the super-absorbent material (22) is present in a smaller quantity than 70% in dry weight with respect to a dry weight of the non-woven textile (20).
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