Combined air/water backwash in a travelling bridge filter
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United States of America Patent
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-
Mar 28, 1995
Grant Date -
N/A
app pub date -
May 24, 1993
filing date -
May 24, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a travelling bridge filtration system including a tank divided into a plurality of adjacent filter cells, each of the cells containing filter media, a travelling bridge carriage located above the tank and movable along the tank, the carriage supporting a backwash hood engageable with each of the filter cells, the improvement comprising a liquid backwash pump for causing backwash liquid to flow through the cell in a first backwash direction counter to a second filtration direction, and for causing backwash air to be drawn into the cell and to flow in the first direction with the backwash liquid.
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