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6/9/2015Water filtration1 FILTRATION Settling does not remove all flocs – further treatment is required Filtration provides the additional opportunity for separation of small flocs or particles This presentation is an introduction to filtration technology concepts
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6/9/2015Water filtration2 Overview of solid-liquid separation alternatives in water Direct Filtration
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6/9/2015Water filtration3 (precoat filtration) or expanded perlite
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6/9/2015Water filtration5 Particle size (micron)
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6/9/2015Water filtration6 Filtration Mechanisms Important to understand the mechanisms Settling, adsorption and diffusion Not much screening
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6/9/2015Water filtration8 A B C
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6/9/2015Water filtration12 2-4 gpm/ft 2 18-40 thou 1.6-3.3 ft 0.5-2 thou 1-3 gpm/ft 2 Filter Classification by Filtration Rate
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6/9/2015Water filtration14 Diagrammatic layout of sand filters
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6/9/2015Water filtration15 Typical multimedia filter
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6/9/2015Water filtration16 Construction details of sand filters
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6/9/2015Water filtration17 Construction details of sand filter
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6/9/2015Water filtration19 Filter operation
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6/9/2015Water filtration21 Some examples of layout and construction details
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6/9/2015Water filtration22 Multimedia filters
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6/9/2015Water filtration27 PRESSUREFILTERS
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6/9/2015Water filtration29 1.Overflow 2.Filter Influent 3.Coarse Media 4.Fine Media 5.Filtrate Nozzles 6.Filtrate Chamber 7.Level Controller 8.Filter Reject 9.Wash box 10.Counter-Current Washer 11.Airlift 12.Central Feed Chamber 13.Actuated Valve
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6/9/2015Water filtration30 Slow Sand Filtration
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6/9/2015Water filtration31 Slow Sand Filter Cleaning
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6/9/2015Water filtration32 Slow Sand Filter Underdrain
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