| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To achieve the stabilization and increase in efficiency of automatic cleaning for a floating filter medium layer by instantaneously and stably performing the break of a water-sealed tank. <P>SOLUTION: The automatic cleaning device for a floating filter medium layer for biofiltration treatment comprises: an air accumulation part provided at the bottom part of a treatment tank; the water-sealed tank provided at the inner part of the air accumulation part; a cleaning wastewater pipe air-tightly passing through the upper wall face of the air accumulation part, and having edge part facing to the bottom part of the water-sealed tank; and an U-shaped air passage which is arranged between the air accumulation part and the water-sealed tank, and in which one edge is communicated with the cleaning wastewater pipe within the air accumulation part, and the other edge is opened to the inside of the upper space of the air accumulation part. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
