| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a combined sewage overflow water treatment system which can be installed in a saved space, and also is easy in maintenance and never cause filtration to become inoperable by clogging. <P>SOLUTION: The overflow water treatment system 100 includes: a first vertical hole 110; an overflow water flow channel 120 for connecting a combined sewage pipe 11 to the first vertical hole 110; a filter medium layer 132 formed out of a filter medium; a screen 131 for supporting the filter medium; a second vertical hole 130 having a water collection device 133 installed below the filter medium layer 132 and a filtrated water discharge pipe 134 installed above the filter medium layer 132; a connection flow channel 140 for connecting the first vertical hole 110 to the second vertical hole 130; and a back washing pump 160 connected to the water collection device 133. In the overflow water treatment system, at least either a connection part between the combined sewage pipe 11 and the overflow water flow channel 120 or a connection part between the first vertical hole 110 and the overflow water flow channel 120 is positioned above the filtrated water discharge pipe 134, and the connection part between the second vertical hole 130 and the connection flow channel 140 is positioned below the filter medium layer 132. <P>COPYRIGHT: (C)2011,JPO&INPIT |
