Abstract
A miniature vibrating hollow-fiber filtration device, in which a hollow-fiber cartridge mounted on a bridge held by two plate springs is vibrated to axial direction by a vibration motor, has been developed. The device can restrain the deposition of particles on the membrane surface by the vibration. A device, which has two hollow-fiber (length of 190 mm, an inside diameter of 1 mm and pore diameter of 0.1 μm), was tested at a membrane vibration frequency of 40 Hz and an amplitude of 2.5 mm p-p. During the test the liquid (Kaolin suspension ; turbridity : 1000) was filtered through the membrane for two weeks. It was found that the rate of permeation is almost constant after the test. However, when it was not vibrated, the end permeation rate was one quarter of the rate when vibrated.
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