Water aeration is a major feature in many industrial applications, for example, hydraulic turbines, fish farms, water treatment, and so on. A key consideration is the efficiency of the aeration itself, that is, the effectiveness of the transfer of oxygen from air to water in relation to the energy consumed by injection. In this chapter, several configurations of the aerator are analyzed for overall efficiency optimization. Two different parameters are investigated (the arrangement of aeration apertures and aperture diameters between 0.2 and 1.6 mm) using aerators with perforated metal plates and, for comparison, ceramic and fritted (sintered) glass plates. For the arrangement of the apertures on the perforated metal plates, bubble coalescence and contraction coefficients are measured. Each configuration’s results (Kla, SOTR, SAE) are compared and analyzed.
Part of the book: Desalination and Water Treatment