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2019•FME TransactionOpen access

Improving removal efficiency of sedimentation tanks using different inlet and outlet position

Firdaouss Bouisfi, Achraf Bouisfi, Hamza Ouarriche, Bouhali El, Mohamed Chaoui

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Abstract

Sedimentation by gravity is the oldest water treatment. Inlet and outlet of rectangular sedimentation tank are often located in the middle of the tank. The present investigation studies the effect of changing inlet and outlet position of rectangular sedimentation tank on removal efficiency using Computational Fluid Dynamics method. Two different configurations are proposed and they have been tested with varying particles diameters and concentration. Numerical model ability to describe flow field behaviour inside the tank is confirmed by an experimentation data. Results show that inlet and outlet position influence the flow field and removal efficiency of sedimentation tanks, especially for the case of fine particles (50 and 120µm).

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Sedimentation by gravity is the oldest water treatment. Inlet and outlet of rectangular sedimentation tank are often located in the middle of the tank. The present investigation studies the effect of changing inlet and outlet position of rectangular sedimentation tank on removal efficiency using Computational Fluid Dynamics method. Two different configurations are proposed and they have been tested with varying particles diameters and concentration. Numerical model ability to describe flow field behaviour inside the tank is confirmed by an experimentation data. Results show that inlet and outlet position influence the flow field and removal efficiency of sedimentation tanks, especially for the case of fine particles (50 and 120µm).

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Available abstract

Sedimentation by gravity is the oldest water treatment. Inlet and outlet of rectangular sedimentation tank are often located in the middle of the tank. The present investigation studies the effect of changing inlet and outlet position of rectangular sedimentation tank on removal efficiency using Computational Fluid Dynamics method. Two different configurations are proposed and they have been tested with varying particles diameters and concentration. Numerical model ability to describe flow field behaviour inside the tank is confirmed by an experimentation data. Results show that inlet and outlet position influence the flow field and removal efficiency of sedimentation tanks, especially for the case of fine particles (50 and 120µm).

Key concepts: Inlet, Sedimentation, Position (finance), Flow (mathematics), Marine engineering, Computational fluid dynamics, Mechanics, Geology

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