| 摘要 |
PROBLEM TO BE SOLVED: To provide a dissolved air flotation system sufficiently adhering an air bubble to an SS and efficiently carrying out floatation separation. SOLUTION: Raw water and pressurized water are mixed in a raw water supply pipe 3 and introduced downward, preferably, in a tangential direction in a field well 10. This mixture water overflows from the upper end of the field well 10 upward in a tank body 1 and the floatation separation is carried out in the tank body 1. A pressurized water supply pipe 4 is inserted into the bend pipe part 3b of the raw water supply pipe 3. The end of the pressurized water supply pipe 4 is located in the bend pipe part 3b. The pipe axis direction of the pressurized water supply pipe 4 has a direction where a spiral turn flow in a second straight pipe part 3c is formed by loaded pressure water. COPYRIGHT: (C)2008,JPO&INPIT
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