Weir Aeration: Models and Unit Energy Consumption
R. Speece, N. Nirmalakhandan, Ning Tang
A broad weir-aeration model was derived to predict downstream dissolved oxygen (DO) over a wide range of upstream DO concentrations and fall heights. This model was then used to construct a three-dimensional surface of downstream DO for a range of upstream DO concentrations and fall heights. A three-dimensional surface for kW.hr per ton of DO absorbed was constructed for a range of upstream DO concentrations and fall heights. This shows the asymptotic rise in energy per ton of DO absorbed for weir aeration is below that for surface aeration and above that for fine bubble diffusers, for downstream DO concentrations of 0-8mg/L.
Available upon request at the American Society of Civil Engineer