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Flocculator length

Flow rate

Influent Turbidity

Alum dose

Residence time

2796 cm

3-19 mL/s

100 NTU

45 mg/L

1196.13 s

Image Added
*Figure 1 *:_ Evolution of the velocity gradient with flow rate_Expand this table to include relevant values for G and G*theta. OR I think it may be more beneficial to plot a graph of this in MathCAD and then show the figure so that all someone has to do is look at the graph and pull off a G for a given flow rate)

The experiment was conducted with the parameters shown in table 1. The parameters were based on one of Ian's experiment (data from 5/13/2009) conducted with the same inputs, except for the flow rates which vary from 4 to 19 mL/s and the turbidity which was set at 50 NTU(MathCAD file). Figure 3 shows the plot of the effluent turbidity during the settling state as a function of time and flow rate. The flow is, in fact, changing at each cycle and we can see that the turbidity is decreasing at each settling state. (I don't think that a 3-D plot conveys this well. You should put the 3-D plot in your "Materials and Methods" section and describe why you use it. Do not present this as data, especially since someone reading it on here cannot rotate the graph.)Image Removed
Figure 1:Plot of the effluent turbidity (NTU) during the loading state vs. time (sec) and flow rate (mL/s). Experiment of 9/24/2009

The figures 2,3,4,5 show the plots, given by the data processor, with the data from our experiment (9/24/09) and the data from the Spring 2009 experiment (5/13/09). Comparing graphs at each state, we observed similar results when compared with the previous years experiments. Our experimental values; seen on the graphs below, are not exactly the same as Ian's Spring 2009 data because the experiments were not performed under the same conditions, but they closely resembled one another.

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