Data Fluctuation
Our team ran a typical experiment multiple times consistently to see how the data fluctuated during the settling period between experiments. The experiment set up was an influent turbidity of 50 NTU, a flocculator length of 25 feet, and a G of 3.1 1/s. We repeated this experiment at least ten times in a row. We extrapolated the data from just the settling state (600 seconds), we found the average and standard deviation of the influent turbidity and the effluent turbidity separately at each second interval.
Figure 1: Standard Deviations of the Influent and Effluent Settling Turbidities from 10 consecutive experiments using the same position of the settling column (top).
Figure 2: Standard Deviations of the Influent and Effluent Settling Turbidities from 10 consecutive experiments using a new position of the settling column (bottom).