SEPARATION MEMBRANE ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide a separation membrane element stabilized in the separation removable performance when it has been run for a long time.SOLUTION: A separation membrane element comprises: a tube assembly; a separation membrane having a supply side face and a transmission side face and wound around said tube assembly; and a plurality of protrusions fixed on the transmission side of the separation membrane. The protrusions are a plurality of resin bodies fixed on the face of the transmission side. The separation membrane element further comprises: small-width protrusions having a width of 0.05 mm to 5 mm in a first direction parallel to the longitudinal direction of said tube assembly; and a wide protrusion made wider than the small-width protrusions.