| 摘要 |
PROBLEM TO BE SOLVED: To provide a spiral membrane element in which a turbid component is hardly accumulated even when high-turbidity raw water such as industrial water is supplied to the element without being pretreated so that the raw water can be treated stably over a long period of time, and to provide a reverse osmosis membrane module and a reverse osmosis membrane apparatus. SOLUTION: This spiral membrane element is obtained by winding a bag-shape separation membrane around the outer peripheral surface of a permeated water collecting tube together with a raw water spacer. The average number of the intersection points of the wires of the raw water spacer to intersect each other is made to be≥500 and <10,000 per 1 m<SP>2</SP>of the raw water spacer. COPYRIGHT: (C)2004,JPO
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