| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a batch type activated sludge treating device which can maintain activated sludge at high concentration. SOLUTION: In the batch type waste water treating device in which a biological reaction tank 2 which is partitioned into an anaerobic tank 4 for denitrifying raw water, an aerobic tank 5 for nitrifying denitrified liquid, and an aeration tank 6 for aerating nitrified liquid is provided and after settling sludge, supernatant water is discharged, a filer unit 10 comprising a space holding member, a spacer member, and a filter membrane composed of non-woven fabrics is submerged in each of the tanks 4, 5, 6.</p> |
