| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an apparatus for treating waste water, in which the quality of the treated waste water to be discharged to the outside can be made better/lower to satisfy the various water quality standards and consequently the waste of energy can be restrained. <P>SOLUTION: The apparatus for treating waste water has an aeration tank 10, a solid-liquid separation tank 20 and a discharge tank 30 which are arranged in this order and the adjacent ones of which are connected to each other by a flow passage. The waste water to be treated is introduced into the aeration tank 10, aerated and treated with a microbe. The aerated/treated waste water is introduced into the solid-liquid separation tank 20 and separated into sludge and treated waste water by solid-liquid separation. The treated waste water is introduced into the discharge tank 30 and then discharged to the outside from the discharge tank 30. The aeration tank 10 is connected to the discharge tank 30 by a bypass flow passage. A water quality adjusting means is arranged for adjusting the quality of the treated waste water to be discharged to the outside by supplying a part or the whole of at least one of the waste water to be introduced into the aeration tank and the waste water being aerated/treated in the aeration tank to the discharge tank 30 through the bypass flow passage and mixing the waste water supplied through the bypass flow passage with the treated waste water in the discharge tank. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
