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Optimization of Design and Operating Parameters for Single-Media, Unstratified-Bed Filters

by Fathy Saleh, Southern Univ, Dep of Civil, Engineering, Baton Rouge, LA, USA,
James C. Young, Southern Univ, Dep of Civil, Engineering, Baton Rouge, LA, USA,
Donald E. Burns, Southern Univ, Dep of Civil, Engineering, Baton Rouge, LA, USA,



Document Type: Proceeding Paper

Part of: Environmental Engineering

Abstract:

The potentially successful use of filters containing large grain-size single media for water filtration has prompted investigation of the parameters controlling the performance of these filters under varying input conditions. Preliminary investigations in 1978 indicated that it was possible to use a single media filter containing sand at sizes up to 2. 1 mm to reduce turbidity in lime-softening plant clarifier overflow from about 5 to less than 0. 5 T. U. (turbidity units). It was established, however, that a polymer was required to obtain this turbidity removal and that the run length was much greater with large grain size single-media filters than with dual-media filters receiving the same influent solids load and polymer dose. No efforts were made in this preliminary work to optimize media bed depth and/or polymer dose.

Subject Headings: Filters | Water treatment | Filtration | Turbidity | Synthetic materials | Polymer | Sand filters

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