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- Determine if there is minimum required tank depth below the lamella for blanket formation, and what that minimum depth is
- Determine the optimal relationship between the floc blanket and the bottom of lamella before performance is affected
- Determine the minimum how short can the lamella (vertical distance) before they are ineffective.
- Test lamella spacing to determing a minimum and the optimal spacing
- Determine if a combination sed tank can be used, and determine if that is the most efficient set-up.
Methods
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and Results
Set-up
The set-up is generally the same for all experiments conducted this semester.
- Two tanks: one without lamella, one with lamella placed so that the bottom of the lamella are at 1/2 the depth of the tank
- There is a small hole at the top of each tank that is usually plugged. To collect data on the turbidity of the water above the floc blanket, a thin tube is inserted in the hole. The tube is connected to a peristalic pump that pumps water to a turbidimeter.
Effects of Lamella at Different Depths
Lamella Depth
Lamella Spacing
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