PURPOSE: To regenerate a hollow yarn membrane without deteriorating the membrane by injecting ozonized air to the raw water side of the hollow yarn membrane as bubbles, and bringing the microbes, etc., deposited on the membrane into contact with the ozonized air bubbles.
CONSTITUTION: Raw water contg. suspended matter is filtered by the hollow yarn membrane 2, and the hollow yarn membrane is regenerated after the operation is continued. In this case, a raw water supply pipe 5 and a filtered water discharge pipe 6 are closed, backwashing water is sent from a backwashing water supply pipe 8 to discharge released suspended matter from a backwashing liq. discharge pipe 9. The raw water supply pipe 5 and the backwashing liq. discharge pipe 9 are then closed, ozonized air generated in an ozonizer 10 is introduced into a diffusion pipe 12 through an ozonized air supply pipe 11 and injected to the part B of a filter vessel 1 as tiny bubbles, the ozone is brought into contact with the hollow yarn membrane 2 from its outside, and the sticky material due to microbes, metal oxides, etc., are oxidized and released. The ozonized air accumulated at the part B of the filter vessel 1 is discharged from an exhaust gas discharge pipe 13 through an ozone decomposing tower 14.
IDE KENICHIRO
SHOJI YUICHI
NIPPON ATOMIC IND GROUP CO
| JPS61107905A | 1986-05-26 | |||
| JPS57194005A | 1982-11-29 |
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