Flume system for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas or a combination thereof
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United States of America Patent
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Mar 31, 2015
Grant Date -
May 30, 2013
app pub date -
Nov 16, 2012
filing date -
May 29, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A filter system having a filter bed for filtering water or wastewater, where the filter bed is periodically washed between service runs by directing washing liquid and washing gas upwardly through the filter bed. The filter system includes a filter bed and at least one flume. The flume is in fluid communication with the filter bed. Preferably, the flume is configured such that no washing liquid and washing gas interface is present in the flume. The flume may be configured such that during washing of the filter bed between service runs the flume receives a washing gas and directs the washing gas upwardly through the filter bed to assist in cleaning the filter bed between service runs. The flume may further be configured such that during washing the only liquid directed from the flume to the filter bed is residual liquid that may be present in the flume from a prior service run.
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