| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To attain improvement in treatment efficiency by an aeration tank as well as improvement in floating-up separation efficiency of fats and oils without using a chemical. <P>SOLUTION: The waste water treatment apparatus includes: a grist lap 3 where fats and oils in the primary waste water exhausted from a factory, a cookroom or the like are stuck to bubbles, so as to be floated up; and an aeration tank 5 where the secondary waste water from the grist lap 3 is treated with bacteria, wherein the waste water in the grist lap 3 is pumped up by a circulation pump 7, and is fed to a pressure regulation device 41 together with the air taken from the inside of the atmosphere. The waste water together with the air fed by the circulation pump 7 is collided against a waste water collision part 63 under pressure conditions in the pressure regulation device 41, so as to form numberless small bubbles, and, regarding the small bubbles and the waste water including a large quantity of oxygen, from an outflow port 45, either is discharged to the grist lap 3, and the other is discharged to the aeration tank 5, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
