| 摘要 |
A filter system is described which comprises a vessel ( 10 ) containing a plurality of sets of discs ( 41 ). Each set of discs ( 41 ) comprises a number of discs ( 40 ) stacked one above the other. The discs ( 40 ) have grooves ( 50 ) on their opposite sides so that media to be filtered passes through the grooves and contaminants in the media are prevented from passing through the grooves or trapped by the grooves. A backwash system ( 25 ) is provided for supplying air to force liquid in the opposite direction through the grooves to wash any contaminant out of the grooves. An air vent ( 26 ) is provided for allowing compressed air to escape from the vessel ( 10 ) and an outlet ( 16 ) is provided for discharge of contaminant.
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