Study on Oxygenation Performance of Solid Jet Aerator having Circular Opening corresponding to Variable Jet Length and Flow Area

Abstract

Mechanical aerators are most commonly used for aeration process in treatment of waste water. Oxygen exchange mechanism by plunging jet of water is a superior method to transfer oxygen into pool of water than regular systems. Surface jet aerators, which are closed and simple systems, are uncomplicated in design, working and maintenance. In this study, experiments were conducted on models of solid jet aerators having circular shaped opening with variable jet lengths and area for different discharges. Penetration depth, oxygen transfer factor and Oxygenation efficiency were measured for different jet lengths, corresponding to each area and discharge. It was observed that penetration depth and oxygen transfer efficiency increments with increase in discharge and jet length in air whereas oxygen transfer factor increases with jet length in air only. With the results achieved, an efficient aerator model was suggested for a given set of inflow and environmental conditions.