| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a waste water treatment apparatus in which a rotary drum and its rotating mechanism are not necessitated so that a carrier is not involved in the rotary drum by the rotation of the rotary drum, waste water treatment is continued by preventing the clogging of a porous member for separating the carrier and suspended matter, the clogging is eliminated easily even when the porous member is clogged and consequently the treatment cost of waste water can be reduced. <P>SOLUTION: This waste water treatment apparatus is composed of: a treatment tank 1 for keeping the microbe-immobilized fluidization carrier 3 in a suspended state in waste water W; a cylindrical body 5 which is sunk vertically almost in the center of the treatment tank 1 and the upper and lower ends 5a, 5b of which are opened; an air supplying means 6 arranged in the lower part of the cylindrical body 5; a bottomed filter body 7 which is arranged in the upper part of the cylindrical body 5 and has a bottom 7b and an upper end 7a opened at the position equal to or higher than the water level L; and a treated water withdrawing pipe 8 extended from the inside of the bottomed filter body 7 to the outside of the treatment tank 1. It is preferable that the bottomed filter body is cylindrical, the cross-sectional area of the cylindrical body 5 is 40-60% of that of the treatment tank 1 and the bottom 7b of the bottomed filter body 7 is plugged. It is more preferable to arrange a water jetting means 9 in an opened portion of the upper end 7a of the bottomed filter body 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
