Page History

...

On November 18, 2009, an experiment was ran with the set up of influent turbidity around 100 NTU, flocculator length of 8800 cm, flow rate of 5 mL/s, and an alum dosage ranging from 20 to 55 mg/L.

Looking at the gamma pdf graph (Figure 5A), all of the alum dosages give a similar distribution to each other, which our lowest mean effluent turbidities were in range from ~1.441 to 1.559 NTU. Figure 5A also shows us that at lower dosages we get the same distribution profile for higher sedimentation velocity range, and a lower mean effluent turbidity. Figure B, the, the residual turbidity graph showed a correlation to Figure A in that the highest resulting turbidities were due to alum dosages of 30 mg/L and 35 mg/L.

5A

5B
Image Modified
FIGURE 5A: The graph plots normalized turbidity vs. sedimentation velocity for each Alum dose ranging 20 mg/L~55 mg/L; FIGURE 5B: The graph plots the residual turbidity vs. sedimentation velocity for each Alum dose ranging 20 mg/L~55 mg/L

...