The discussion is further reinforced through validating the numerical model against the experimental findings for stratified flow conditions. In order to improve the performance and ease of maintenance, design modifications have been proposed by using a perforated tube for water extraction and are found to be satisfactory. The flow features give better confidence, but the flocs escape through the outlet still prevails which is averse to the system performance. 3D numerical simulations on a scaled down model of the DAF design were analysed. Setting up the modelling framework involving the multiphase flow problem is briefly discussed. The present study is intended towards a comprehensive computational analysis for design optimization of the treatment plant in Kluizen, Belgium. Given the multiphase nature of the process, fluid dynamics studies are important to understand and optimize the DAF system in terms of operation and design. However, the process as well as the preceding flocculation step is complex and not completely understood. Dissolved air flotation (DAF) has received more attention recently as a separation technique in both drinking water as well as wastewater treatment.
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