To provide a floating filter apparatus constituted so that the clogging on the undersurface side of a filter bed comprising a floating filter medium is suppressed and the washing frequency of the filter bed is reduced.
The filter bed 13 in a filter column 10 is composed of a small particle size bed 11 comprising a small particle size filter medium and a large particle size bed 12 comprising a large particle size filter medium provided on the underside thereof. The raw water in a raw water tank 1 is introduced into the filter column 10 in a revolving direction through pipings 2, 3 and 4 by driving a pump P and the large particle size filter medium in the lower part of the large particle size bed 12 is introduced into the piping 2 along with water through a pipe 21 and further circulated through the pipings 3 and 4 by the pump P. A part of the water in the filter column 10 is circulated to the piping 3 through a piping 41, a sediment receiving tank 50 and a piping 55. Since the piping 55 obliquely crosses the piping 3, the water in the piping 55 is sucked into the piping 3 by ejector action.
| JP2855502 | [Title of Invention] Water Purifier |
| WO/1999/058456 | COAGULATOR |
| JP3619108 | METAZOA REMOVAL PROCESS |
YAMADA YOSUKE
TOOKAICHI TSUTOMU
YAMADA TETSUZO
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