Experimental investigation and modeling on the supersaturated total dissolved gas (TDG) dissipation in aeration

• DOI: 10.2166/wst.2023.336
• Publication Date: 2023-10-24T11:49:00Z
• Authors: Yuanbo Yao; Huixia Yang; Yunyun Wang
• Keywords: Supersaturation

Abstract Supersaturated total dissolved gas generation in rivers poses great harm to aquatic organisms. Thirty groups of supersaturated TDG dissipation experiments with aeration were carried out three different types water depth. These results showed that the reduced proportion aperture was 35.51% from 215 260 mm, rate decreased by 34.94% 1.0 5.0 m3/h, whereas depth increased 16.93% 0.4 1.2 m. And mm and m, variations coefficients 86.26, 23.74 −5.39%, respectively. A quantitative relationship established between coefficient conditions, average error 27.10%. elevated increasing a power function relationship, while inhibited its dissipation. Moreover, when critical source treatment sensitivity parameter β = 10.52, original experimental data simulated values multiphase model 0.2%. The study provides essential scientific guiding recommendations for mitigating harms protecting ecological environment.