| 摘要 |
PROBLEM TO BE SOLVED: To provide a cassette type membrane unit of high space utilization factor and favorable workability when a pair of hollow fiber membrane elements are linearly arranged. ! SOLUTION: A cassette type membrane unit 1, which filters a treatment liquid by immersion in the treatment liquid, comprises a pair of hollow fiber membrane elements 2A, 2b to which an upper side liquid collecting pipe 23 and a lower side liquid collecting pipe 24 for collecting a filtrate filtered with a hollow fiber membrane 21 are connected, a frame body 3 for arranging the pair of hollow fiber membrane elements 2A, 2b along the extension direction of the upper side liquid collecting pipe 23, a liquid collecting header pipe 4 disposed above the hollow fiber membrane elements 2, and a liquid collecting branch pipe 5 for coupling the upper side liquid collecting pipe 23 with the liquid collecting header pipe 4, at the top edge and the bottom edge of a hollow fiber membrane group 22 with a parallel array of many fiber |
