| 摘要 |
The present invention provides a spiral separation membrane element comprising a plurality of separation membrane pairs wound around the outer peripheral surface of a water collection pipe, wherein the plurality of separation membranes include at least two sets of separation membrane pairs in which two adjacent separation membranes are stacked in such a way that the water supply sides of the separation membranes form opposing surfaces, and the water supply-side surfaces at the ends of separation membranes close to the water collection pipe and parallel to the lengthwise direction of the water collection pipe are sealed by means of a sealing material. |
