Investigation of the Submerged Depth of Aeration Impellers in an Oxidation Ditch by Numerical Simulation

Abstract:

In this paper, the flow structure of the oxidation ditch was studied using numerical simulation method and different submerged depth of aeration impellers. The computed velocity fields were analyzed, which shows that under the same conditions, and by using the optimal submerged depth the average velocity of the flow in oxidation ditch is increased and the velocity near-bottom has increased significantly. The results of comparisons show that the velocity distribution is more uniform along the depth direction, and that the flow velocity distribution structure can prevent sludge from settling in the oxidation ditch processing system at the submergence ratio called the optimal submergence ratio, which helps to improve the efficiency of oxidation ditch sewage treatment system.

• Periodical: Applied Mechanics and Materials (Volumes 178-181)
• Pages: 429-432
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.178-181.429
• Online since: May 2012
• Authors: Y. L. Liu, B. Lv, W.L. Wei
• Keywords: Flow Field, Numerical Simulation, Optimal Submerged Depth, Oxidation Ditch

References

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