Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Reexamination Certificate
2008-06-03
2008-06-03
Lawrence, Frank M. (Department: 1797)
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
C210S786000, C210S792000, C210S097000, C210S268000
Reexamination Certificate
active
07381336
ABSTRACT:
An automated method for controlling a solids inventory in a continuous backwashing upflow sand filter system treating a liquid inflow having impurities therein, includes the steps of: monitoring an influent inflow pressure and controlling the air pressure in an air lift pump to maintain a target ratio range between the size of a solids inventory of the system and the size of the sand bed of the system.
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Lawrence Frank M.
MM Filtration Company
Patent Law & Venture Group
Scott Gene
LandOfFree
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