| 摘要 |
PURPOSE:To eliminate the difference of a separation result between sections by making the pressure between the front and back surfaces of the separation membrane of each section constant, by providing a membrane water transmitting amount regulation valve to the membrane transmitted liquid outlet of each section of a plate and frame type membrane separation apparatus. CONSTITUTION:In a plate and frame type membrane separation module wherein a plurality of divided sections S-1-S-4 are arranged in series, membrane water transmitting amount regulation valves (a)-(d) are arranged to the membrane transmitted liquid outlets of the sections S1-S4. A liquid A to be treated is supplied by a pump to be passed through said sections in order from the section S-4 while the membrane transmitted liquid B flows to the support of each membrane to be taken out from piping through each of flowmeters 1-4 at every section. At this time, the membrane transmitting flow speed from each section is set to an optimum condition by operating each of the valves (a)-(d) to make the composition from each section constant and the transmitted liquids from the sections S1-S4 are gathered to one piping to be taken out through a flowmeter 5. |
