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 Report


h2. Introduction


h2. Methods

h3. +Schematic+
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*Schematic of Apparatus Setup*
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h3. +Initial Apparatus Setup+
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*Initial Apparatus Setup*
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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

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h3. +New Apparatus Setup+
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*New Apparatus Setup*
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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

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h3. +Design Parameters+

h3. +Equations+
*Critical Settling Velocity:* !vc.png!
*Velocity Gradient:* !G.png!
*Residence Time:* !Theta.png!

h3. +L/D+
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h3. +V{~}c~+
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h3. +Straw Bundles+
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*Type 1 Straws - 12mm*
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*Type 2 Straws - 5mm*
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*Type 3 Straws - 3mm*
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h2. Results & Discussion

h3. Matrix of Experiments
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h3. Experiment Obstacles
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*Floc Blanket*
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*Clogged Straws*
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h3. Experimental Trials
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h2. Conclusions