Membrane batch filtration process
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United States of America Patent
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N/A
Issued Date -
Sep 8, 2005
app pub date -
Feb 22, 2005
filing date -
Feb 27, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A membrane batch filtration process has a step of reducing the water level in the tank by permeation prior to emptying the tank to reduce the volume of water drained after each batch. Permeation may continue even after a portion of the membranes is exposed to air to further lower the water level. The membranes may be backwashed after the water level has been lowered. The water level may be lowered again after the backwash. The tank drain may begin with a portion of the membranes exposed to air.
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