Dynamic Bed Clarifiers
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Filtration & Separation SolutionsDYNAMIC BED CLARIFIERS The Dynamic Bed Clarifier (DBC) offered by Roytec Global was developed based on the technology and know-how developed for the highly efficient Pin Bed Clarifier (PBC). In the Roytec PBC, the solids in the feed are reduced from typically 5000ppm down to 10-20ppm. The high solids handling capabilities and high overflow clarities achieved in a Roytec PBC is achieved through the utilization of a fluidized bed of sludge in the primary solids removal zone.The coagulated and flocculated feed is passed through the fluidized bed where the majority of the solids removal takes place. The fluidized bed acts as a filtration medium, as well as promoting further coagulation and flocculation. Following extensive pilot testing and on-site operation, it was found that the primary separation zone performed the bulk of the solids removal. In most cases the solids were reduced to less than 50ppm in the primary separation zone. The floating media bed then further reduced the solids to less than 20ppm. Due to the high solids removal efficiency of the primary separation zone, Roytec now offers the DBC, where the TSS requirements in the supernatant of the liquor being treated is not as stringent and a slightly higher overflow TSS specification can be tolerated. The design and operation of the DBC is based on the primary separation zone of the PBC and excludes the media filtration section. This has a number of advantages: • Significant reduction in capital and operating costs due to exclusion of media section. • Reduced downtime to clean media retaining screen and replace the media. • No backwashing required - Increased capacity of the clarifier plant - Reduced feed tank size - No interruption to process flow. 3 Angus Crescent Longmeadow Business Estate East Modderfontein South Africa, 1 609 Disclaimer: The material in this document is presented strictly for information purposes. While every effort has been made to ensure its corectness, neither the correctness nor the sustainability of the information for any purpose is warranted. Product specifications and features are subjected to change without notice. Copyright: Roytec Global (Pty) Ltd. All Rights Reserved.

Filtration & Separation SolutionsDESIGN FEATURES The high solids removal efficiencies obtained in the Roytec DBC are achieved through a number of unique design features: • Utilization of a coagulation and flocculation mixing system • Use of an inorganic coagulant to coagulate the ultrafine and colloidal material, and a flocculant is added to ensure fast sludge settling. • Simple and effective sludge level control without the requirements for instrumentation. • Installation of an underflow sludge raking system. • The installation of the world leading RadFlow™ feedwell technology developed...