IMMERSION TYPE MEMBRANE SEPARATION APPARATUS AND ITS OPERATION METHOD

PROBLEM TO BE SOLVED: To provide an immersion type membrane separation apparatus having excellent filtration performance, and its operation method. SOLUTION: The immersion type membrane separation apparatus has a flocculation tank 2 and a membrane separation tank 3. The flocculation tank 2 is provided with a flocculant addition device 11 and an agitator 12. The inside of the membrane separation tank 3 is divided into a first tank 3a and a second tank 3b by a partition wall 14. The first and second tanks 3a and 3b are communicated to each other through the upper end side and the lower end side of the partition wall 14 so as to circulate liquid. The first tank 3a is provided with an agitator 16, and the inside of the second tank 3b is provided with a membrane separation module 15 and an aeration device 17. COPYRIGHT: (C)2009,JPO&INPIT