![]() The tank itself is doughnut in shape containing two settling. The comparison of model predicted results with the field data collected in tanks before and after modifications shows very good agreement. It is a round clarification device with a rectangular valve box attached to the rear of the device. It is noteworthy that even small differences in the particle velocity can cause large changes in the percent of settled particles in this work, the overall solids removal efficiency increased when using the modifications from 84.4 and 98.8%, leading to a reduction of the effluent solids concentration of approximately 85%. The proposed strategy is computationally much more efficient than the corresponding strategies used for the simulation of wastewater treatment. The usually unknown and difficult to be measured particle density is found by matching the theoretical to the easily measured experimental total settling efficiency. ![]() A two-dimensional fully mass conservative sedimentation model, based on modern computational fluid dynamics theory, was applied to evaluate proposed tank modifications of the existing and modified sedimentation tanks. Several modifications with different construction costs were proposed to enhance the performance in large rectangular sedimentation tanks. Design of rectangular tank 1 Tank dimension height 2850mm and width 2850mm.
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