| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide rainwater treatment equipment capable of reducing a construction labor and a construction cost. <P>SOLUTION: Rainwater 3 to be treated which has flown from a rainwater drainage canal 2 is filtered by a cylindrical filter tank 6, and the filtered treated rainwater 9 is made to permeate underground in an underground permeation layer 12. Excess treated rainwater 9 is made to flow into a rainwater storage tank 11. The cylindrical filter tank 6 is constituted by erecting an inner cylindrical body 23 inside an external cylindrical body 20 with a bottom, and the rainwater 3 to be treated which has flown into an inflow space 30 between the two cylindrical bodies is made to flow into the inner cylindrical body 23. The rainwater 3 to be treated which has flown into the inner cylindrical body 23 is subjected to filtering treatment by a filter medium 7, the treated rainwater 9 is discharged to the outside of the cylindrical filter tank via an outflow pipe 10. The inner cylindrical body 23 is constituted by connecting a splice cylinder 29 having a vertical length according to a construction site on a cylindrical body 76. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
