Which device is responsible for collecting settled water from a sedimentation basin?

Which device is responsible for collecting settled water from a sedimentation basin?

• A. Flow meter
• B. Effluent launder
• C. Settling tank
• D. Filtration unit

Answer: (B)

The effluent launder is the device designed specifically to collect settled water from a sedimentation basin. In the sedimentation process, water is allowed to sit so that suspended particles can settle out due to gravity. As the solids settle at the bottom, the clarified water remains above them. The effluent launder is typically positioned at the surface of the sedimentation basin and serves the critical function of channeling the clear water away for further treatment or discharge, thereby ensuring that the settled solids are not disturbed and remain at the bottom of the basin. While other choices, such as the settling tank and filtration unit, may be involved in water treatment processes, they do not serve the same specific purpose as the effluent launder. A settling tank refers more broadly to a structure where sedimentation occurs but does not inherently include the collection mechanism for the settled water. A filtration unit is utilized later in the treatment process to remove smaller particles and impurities from the water after sedimentation has taken place. Lastly, a flow meter is an instrument for measuring the flow rate of water, but it does not collect the water itself.

The effluent launder is the device designed specifically to collect settled water from a sedimentation basin. In the sedimentation process, water is allowed to sit so that suspended particles can settle out due to gravity. As the solids settle at the bottom, the clarified water remains above them. The effluent launder is typically positioned at the surface of the sedimentation basin and serves the critical function of channeling the clear water away for further treatment or discharge, thereby ensuring that the settled solids are not disturbed and remain at the bottom of the basin.

While other choices, such as the settling tank and filtration unit, may be involved in water treatment processes, they do not serve the same specific purpose as the effluent launder. A settling tank refers more broadly to a structure where sedimentation occurs but does not inherently include the collection mechanism for the settled water. A filtration unit is utilized later in the treatment process to remove smaller particles and impurities from the water after sedimentation has taken place. Lastly, a flow meter is an instrument for measuring the flow rate of water, but it does not collect the water itself.