T5 - CIVL 242 TUTORIAL 5 So (ceso@ust.hk) Kin...

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CIVL 242 TUTORIAL 5 So (ceso@ust.hk) Kin (ceskin@ust.hk)
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Filtration Depth Filtration Slow Sand Filtration Rapid Sand Filtration Surface Filtration Lab, Cloth Filtration Membrane Filtration – (water reuse) Micro filtration, Ultrafiltration, Nanofiltration Reverse Osmosis (RO)
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Depth Filtration (Slow Sand Filter) Working Area
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Depth Filtration (Slow Sand Filter) Features Shallow functional depth (only straining) with small medium (sand) (effective size of 0.2 mm); Slow flow rate ( 0.12~0.32 m/hr ); Periodically scraping off surface layer (0.5-1 in.) (every 30 days); Small wash water consumption ( 0.2-0.6% of filtered water) for cleaning media offsite.
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Depth Filtration (Rapid Sand Filter)
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Depth Filtration (Rapid Sand Filter) Features Deep functional layer with larger filter media size (effective size of 0.45 mm and higher); Higher flow rate ( 2.5~5.0 m/hr ); Periodically “backwash” scour cleaning after each filter run; Higher wash water consumption ( 1-5% of the filtered water).
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This note was uploaded on 09/13/2011 for the course CIVL 242 taught by Professor Gh during the Fall '09 term at HKUST.

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T5 - CIVL 242 TUTORIAL 5 So (ceso@ust.hk) Kin...

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