Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
June 3, 2008
Patent Application Number
10685917
Date Filed
October 14, 2003
Patent Primary Examiner
Patent 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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