| 摘要 |
<p>PURPOSE:To provide a device for waste water treatment possible to effectively and simply execute cleaning work. CONSTITUTION:The treating vessel 10, the upper supporting member 21 and lower supporting member 22 provided in the treating vessel 10 and the filtration medium 23 held between the upper supporting member 21 and the lower supporting member 23 are provided. The air jetting nozzle 40 having the air opening and closing valve 41 is provided downward of the lower supporting member 22. The 1st discharge pipe 31 having the 1st opening and closing valve 31a is connected to right above the upper supporting member 21 and the 2nd discharge pipe 34 having the 2nd opening and closing valve 34a is connected to the bottom of the treating vessel 10.</p> |
