| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the aeration efficiency of a waste water treatment device by a batchwise activated sludge process, and to reduce the production cost of the waste water treatment device as well. <P>SOLUTION: The waste water treatment device 10 utilizing activated sludge comprises a treatment tank 11 having a cylindrical barrel part 11-1 and a bottom face 11-2 tilted so as to be a projecting R-shape, and a cylindrical diffuser 13 provided at the central part of the bottom face 11-2. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
