Related Experiment Video
Updated: Jun 10, 2025

Preparation of Free-Surface Hyperbolic Water Vortices
Published on: July 28, 2023
Effect of aeration on oxygen transfer characteristics in integrated wastewater treatment systems utilizing mass
Wentao Sun1, Qiaorui Si1, Zhi Zheng2
1Research Center of Fluid Machinery Engineering & Technology, Jiangsu University, Zhenjiang 212013, PR China.
Abstract:
This paper investigates the aeration and oxygen transfer characteristics within the aeration tank of an integrated wastewater treatment system (IWTS) using Computational Fluid Dynamics coupled with Population Balance Model and oxygen transfer model. The findings suggest that increasing the air flow rate significantly enhances the oxygen transfer rate, albeit at a decreasing rate of growth. The oxygen overall mass transfer coefficient is primarily influenced by the interfacial area per unit volume and to a lesser by the oxygen mass transfer coefficient (kL). A strong positive correlation is found between turbulence intensity and kL, which, along with dissolved oxygen distribution, confirms the critical role of turbulence in the oxygen transfer process. For small-scale IWTS, an air flow rate of 30 L/min may be the optimal choice.
Related Concept Videos
Typical Model Studies
Turbulent Flow: Problem Solving
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
Conservation of Mass in Fixed, Nondeforming Control Volume
In the case of a sewer pipe, which can be modeled...

