| 摘要 |
PROBLEM TO BE SOLVED: To provide a membrane filtration apparatus, wherein a radio antenna is arranged more suitably to successfully perform radio communication. SOLUTION: An internal member 100 is arranged at different positions in a pressure-resistant vessel 40 between a filtration membrane and the inner wall of the pressure-resistant vessel 40 so that at least a part of the outer wall of the internal member comes close to the inner wall of the pressure-resistant vessel 40. The radio antenna 103A is arranged on the internal member 100. Since at least a part of the outer wall of the internal member 100 comes close to the inner wall of the pressure-resistant vessel 40, the thickness of a stock liquid existing between the outer wall of the internal member and the inner wall of the pressure-resistant vessel 40 becomes thinner and a radio wave is restrained from being attenuated owing to the stock liquid to successfully perform wireless communication. When compared with the case that the radio antenna 103A is arranged in the pressure-resistant vessel 40 between the filtration membrane and the inner wall of the pressure-resistant vessel 40, a restriction as to the position of the wireless antenna 103A to be arranged can be lightened and the radio antenna 103A can be arranged suitably. COPYRIGHT: (C)2011,JPO&INPIT |
