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Wastewater

New Induced Vortex Grit Removal Systems

December 22, 2011
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The Mectan V® is a new generation of induced vortex grit removal system. This highly compact solution is engineered to efficiently remove grit over a wide range of particle sizes while providing robust, reliable performance in municipal wastewater pre-treatment applications. The Mectan V® capitalizes on the enhanced conical design of John Meunier’s original Mectan® grit removal system. With its new revolutionary configuration, the unit has evolved into a highly dynamic system for increased grit removal over a wide range of hydraulic conditions, providing multiple outlet channel positioning options, low headloss, lower power requirement and a decreased carbon footprint. Based on CFD analysis and real-world results, the new design provides increased efficiency in fine grit removal (>20 percent). The patent-pending Mectan® Variangle (Mectan V®) design also provides for significant operating flexibility. The system allows the outlet channel to be positioned in any desired direction, thereby providing enhanced plant design flexibility of the tank’s lower outlet channel configuration. An optimized paddle mixer design maintains optimum grit removal conditions while limiting organics accumulation in the grit well. In addition, the vortex grit removal zone is completely separated from the flow outlet zone with an added steel separator disc in the tank, providing enhanced process stability and reliability.

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