FILTRATION DEVICE AND FILTRATION METHOD USING SAME

摘要

A filtration device equipped with a cylindrical body that has an inflow port and an outflow port for a solution to be treated and multiple hollow fiber membranes that are brought in line with each other in the cylindrical body, said filtration device being so adapted that a pressure difference is caused between the outside and the inside of each of the hollow fiber membranes to allow water in the solution to be treated to pass from the outside of the filtration device to the inside of the filtration device. The filtration device is additionally equipped with a gas supply unit which can supply air bubbles from the lower parts of the multiple hollow fiber membranes, and the cylindrical body has a gas discharge port through which the air bubbles supplied toward a part located above the inflow port and the outflow port by the gas supply unit can be discharged to the outside.