Civil Engineering Reference
In-Depth Information
Fig. 25-9.
Layout for Trident adsorption clarifier package plant (Courtesy of USFilter)
The first stage, the ContaClarifier, is a granular, nonbuoyant media bed that is stable
under all service flow conditions. Chemically dosed water is introduced to the bottom
of the clarifier section and flows upward through the bed. The flow around the irreg-
ularly shaped media particles causes the intimate mixing and interparticle collisions
needed for floc formation. The flocculation process is enhanced by contact with the
previously retained solids. Effective flocculation in combination with straining and
attachment mechanisms in the media achieves clarification with up to 95 percent solids
reduction.
The clarified and conditioned water is transferred to the second stage of the treat-
ment process, the polishing filter. The conventional trimedia filter profile consisting of
