Flow field prediction in full-scale Carrousel oxidation ditch by using computational fluid dynamics

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Yin YangJiakuan Yang

Abstract

In order to optimize the flow field in a full-scale Carrousel oxidation ditch with many sets of disc aerators operating simultaneously, an experimentally validated numerical tool, based on computational fluid dynamics (CFD), was proposed. A full-scale, closed-loop bioreactor (Carrousel oxidation ditch) in Ping Dingshan Sewage Treatment Plant in Ping Dingshan City, a medium-sized city in Henan Province of China, was evaluated using CFD. Moving wall model was created to simulate many sets of disc aerators which created fluid motion in the ditch. The simulated results were acceptable compared with the experimental data and the following results were obtained: (1) a new method called moving wall model could simulate the flow field in Carrousel oxidation ditch with many sets of disc aerators operating simultaneously. The whole number of cells of grids decreased significantly, thus the calculation amount decreased, and (2) CFD modeling generally characterized the flow pattern in the full-scale tank. 3D simulation could be a good supplement for improving the hydrodynamic performance in oxidation ditch designs.

Citations

Aug 11, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Yuquan ZhangHao Jiang
Apr 8, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Wenli WeiYuling Liu
Dec 20, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Qi XuChangzhu Yang

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