Veröffentlichungen und Präsentationen

After rapid mixing of waste water and coagulant, an effective slow mixing during a reasonable retention time will cause to grow the size of flocs up which will settle out easily. Around-the-end hydraulic mixer with barriers is one of the efficient facilities that have been used in water treatment plants for this purpose. A uniform velocity gradient (G) is needed to achieve efficient mixing and chemical coagulation. This can be achieved by proper selection of barrier dimension and spacing. The distribution of G-values with different barrier configurations was investigated using COMSOL Multiphysics® assuming stationary turbulent flow and time dependent diluted species transport. Optimization consisted of the evaluation of different barriers arrangements and dimensions ratios.