Sedimentation Prototype Final Report
Introduction
Methods
Initial Apparatus Setup
Initial Apparatus Setup
The initial apparatus set up was run by Process Controller which had functions set in place for when the system would turn on, off, or drain. It also included a pressure sensor that would control the flow rate of the system. It was found that the pressure sensor was unreliable and sensitive to changes in the environment. Additionally, the flocculator for this setup led to a high velocity gradient (G) of 129.1/s. This led to the formation of very small flocs.
New Apparatus Setup
New Apparatus Setup
In the New Apparatus Setup the diameter of the flocculator was increased. This allowed for an increase in floc size and a significantly lower velocity gradient (G) of 35.7/s. Additionally, the flow control system was changed to utilize a perisaltic pump allowing for a more stable system.
Design Parameter
Equations
L/D
Vc
Straw Bundles
Type 1 Straws - 12mm
Type 2 Straws - 5mm
Type 3 Straws - 3mm