| 摘要 |
PROBLEM TO BE SOLVED: To provide a spiral membrane module which has a sufficient removal rate even in a very low concentration zone, at the same time, has a long life, and further, has a high membrane filling efficiency of the module, and a water treatment method using the spiral membrane module. SOLUTION: An internal passage material 15 is inserted into a bag-like membrane 10 having an opening on a side, and the opening is inserted into a slit 17 of a perforated tube 20 and bonded. A plurality of bag-like membranes 10 are wound around the perforated tube 20 through an external passage material 21 to form a spiral membrane module 26. The membrane module 26 is arranged in a tank 40, an end of the perforated tube 20 is connected to an extraction tube 41, the other end of the perforated tube 20 is closed up, water to be treated is pressure-fed from an inlet 42, and the process water is brought out from the extraction tube 41. The bag-like membrane 10 is a membrane laminate comprising a first flat membrane having an ion-exchange group, and a second flat membrane having a removal function of fine particles. COPYRIGHT: (C)2008,JPO&INPIT
|
