| 摘要 |
PURPOSE:To make the treating operation and device simple and convenient and to save a space by flocculating a water to be treated, oxidizing the water with the aeration air contg. ozone, separating solid and liq. in an immersion-type membrane separator and discharging the water permeated through the membrane as treated water. CONSTITUTION:A water to be treated is introduced into a treating tank 11 from a feed pipe 13, a flocculant is injected into the feed pipe 13 from an injector 12, a blower 20 is operated to introduce air from an aerator 15, ozone is mixed into an air feed pipe 21 from an ozonizer 22, and a negative suction pressure is supplied to an immersion-type membrane separator 14 by a suction pump 18. Consequently, the org. matter, clay, iron colloid, etc., in the water are flocculated, supplied to the tank 11 and oxidized by the ozone-contg. air. As a result, the ions of iron, manganese, etc., are oxidized and insolublized, the org. component is decomposed, and the microorganism is sterilized. The water is separated into solid and liq. by the separator 14, and the water permeated through the membrane is discharged into a treated water tank 19 as treated water. |
