Underdrain unit with air/water backwash for granular filtration system
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United States of America Patent
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-
May 25, 1982
Grant Date -
N/A
app pub date -
Aug 1, 1980
filing date -
Aug 1, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A self-supporting underdrain unit to be placed upon the substantially horizontal floor of a filter tank to provide a liquid filtration system is disclosed. The self-supporting underdrain unit provides separately controllable fluid and exhaust gas header systems for backwashing. The exhaust gas and backwashing fluid are mixed in a turbulent mixing zone to provide superior backwashing and cleansing action.
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