May / June 2007
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WATER REUSE FILTRATION MADE EASY
Amiad Filtration Systems filter products were recently selected and installed for the expanded 20.25 MGD water reuse system at the City of St. Cloud’s Michigan Avenue wastewater treatment plant. The self-cleaning, automatic system utilizes six model EBS-10,000 units with a filtration degree of 200 microns. The cleaning mechanism consists of a suction scanner “focus back-flush” technology which takes advantage of simple physics for cleaning. The “focus flush” concept exhibits 100 percent cleaning using the suction scanner technology. The cleaning nozzle is designed within close tolerances to cylindrical screen for high efficiency of back-flushing. During a back-flush cycle, water moves both tangentially and directly into the orifice of the nozzle due to the large difference between operating and atmospheric pressures. Expanding this concept further; the high velocity (50 ft/sec2) combined with the spiral movement of the nozzle(s) across every square inch of screen area effectively removes the entire filter cake without interruption of flow through the filter units. Typically, back-flushing wastewater is less than one percent of total flow.
The simplicity of design, cleaning efficiency, and reliability based on just a few moving parts are the attributes of a low operating and maintenance system favourable for municipal and industrial applications.
Amiad Filtration Systems
RRC #4082
RRC #4082
