| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a filtration device and method including a new washing method capable of discharging a peeled suspended material with a small amount of water when washing a suspended material-attached filter and heightening a water recovery rate. <P>SOLUTION: The filtration device for removing the suspended material from a suspended material-containing raw water comprises: a filter layer 2 filled with a filter for trapping the suspended material; a raw water introduction tube A for feeding the raw water to the upper part of the filter layer 2; a fine bubble generator 4 for introducing a fine bubble into the raw water; a water collection unit 3 which is provided below the filter layer 2 and collects a treatment water; an air-supplying tube D for supplying air to the water collection unit 3; a treatment water outflow tube F which is stood from the water collection unit to the position upward from the filter layer 2 and discharges the treatment water from the water collection unit; a washing water-introducing tube E which flows a washing water to the filter layer 2 in an upward flow; and a washing water-discharging tube H for discharging the washing water from above the filter layer 2. <P>COPYRIGHT: (C)2013,JPO&INPIT |
