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Our experiments demonstrate that Okun and Schulz equation for headloss through a fluidized bed is a valid tool to use in our design. Once fluidization is achieved, headloss through an expanded bed is constant. For a 5 cm filter bed, headloss was around .7 75 cm regardless of the level of bed expansion. This is a positive discovery because a constant value for expanded bed headloss means that we can calculate all the headloss in our backwash system and design the height difference between the clear well and the filter bed appropriately.
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