| 摘要 |
<p>PURPOSE:To reduce cast of water treatment and to easily constitute a water treatment equipment by compactly constituting the same. CONSTITUTION:An aeration tank 1 is constituted of both the proper numbers of vertically connected cylindrical units 10 and the bottom part unit 2 of the lowermost part. An air lift pipe 11 is provided to the centers of the respective cylindrical units and also a plurality of slender filter mediums 12 are equipped around it. Further, a raw water introducing pipe 4 and an air introducing pipe 3 are connected to the bottom part unit. Water in the tank is circulated by the flow of air ascending through the air lift pipe 11.</p> |
