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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. Over all the mean turbidities seemed to settle at higher and higher effluent turbidites as alum dosage increased.

5A

5B

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

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