Effects of Deposit Resuspension on Settling Basin

by Takeichiro Takamatsu, Prof.; Dept. of Chem. Engrg., Kyoto Univ., Yoshida-honmachi, Sakyo-ku, Kyoto, Japan,
Masaaki Naito, Asst. Prof.; Dept. of Sanitary Engrg., Kyoto Univ., Yoshida-honmachi, Sakyo-ku, Kyoto, Japan,
Sadataka Shiba, (A.M.ASCE), Res. Assoc.; Dept. of Chem. Engrg., Osaka Univ., Toyonaka, Osaka, Japan,
Yasuyo Ueda, Grad. Student; Kyoto Univ., Yoshida-honmachi, Sakyo-ku, Kyoto, Japan,

Serial Information: Journal of the Environmental Engineering Division, 1974, Vol. 100, Issue 4, Pg. 883-903

Document Type: Journal Paper


Scouring of deposits is one of the major factors in designing sedimentation basins for water and wastewater treatment systems. To express the degree of deposit resuspension a scouring parameter is introduced into a dispersion model. The parameter is taken into account in one of the boundary conditions of two-dimensional diffusion equation, which is simplified into a one-dimensional dispersion model. The scouring parameter is related to the longitudinal dispersion coefficient by a model experiment. On the basis of the mathematical expression developed, the existence of the optimum depth of a rectangular settling basin has been theoretically and has been experimentally verified.

Subject Headings: Scour | Parameters (statistics) | Mathematical models | Settling basins | Two-dimensional models | Sediment | Wastewater treatment | Boundary conditions

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