Publication

Abstract : Among the various types of aerators used for wastewater treatment, venturi aerators have some advantages of simplicity of operation, being free of aerosols and thorough mixing of the tank contents. Air gets aspired through holes at the throat and high oxygen transfer occurs due to intense turbulence in the expansion region. In the present work, tests on a venturi aerator placed above water are conducted and the performance is studied in terms of non-dimensional parameters so that a scale up is possible. KLA the overall oxygen transfer factor, Q the discharge, the oxygen transfer efficiency are expressed as (Kl A)/Q (Re) and E Hc (Re) where Hc is a length parameter and Re is a characteristic Reynolds’s number. The venturi required only a pumping device as mechanical unit and it is very suitable for small waste treatment plants. An example is given here to show how a scale up is possible.