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Created by
user-3cd1a, last updated on May 07, 2008
2 minute read
Demo Plant Summer 2007 Sedimentation Tank Design
Closed Top Design
Closed top sedimentation tank, as implemented in the Summer 2007 Demo Plant design.
This sedimentation tank was designed and built in Summer 2007 by Sara Schwetschenau. It features a closed top design and a plastic piece with small orifices at the top of each lamella to equalize the head loss in each channel, theoretically resulting in equal flow through each. However, in reality, we still saw uneven flow through each lamella in the sedimentation tank. This design also made it very difficult to clean out the sedimentation tank between uses.
Since this design featured a closed top sedimentation tank, a weir, shown below, was used to adjust the water level in the flocculator. Rotating the weir to adjust the height of the part open to the atmosphere allowed us to change the pressure head inside the sedimentation tank, and thus changed the water level of the flocculator.