The Bubble Columns and the Aeration Tanks

(Same and Different Points, Gas Hold-Up and Mass Transfer)

Abstract

The requirement of energy saving on sewage and wastewater treatment is increasing for GHG (Green-House Gas) reduction. Aeration tanks of sewage treatment have larger surface area and smaller water depth relatively than bubble columns on the mass transfer in chemical engineering. We understood gradually that the oxygen transfer on aeration tanks of sewage treatment were strongly affected by the flow pattern and the state of surface. This report showed some studies about gas transfer at free surface.