Varying Flow Rate
In order to verify that the equipment was working properly and to familiarize our team with FReTA, we first performed a similar experiment to one that had been done the previous semester. We modified an earlier Process Controller file(see process controller file attached)that been set to run at flocculator length of 2796 cm with an influent turbidity of 50 NTU and a constant alum dosage of 38 mg/L while varying the plant flow rate from 3-19 mL/s, increasing by 1 mL/s each trial to run instead at an influent turbidity of 100 NTU with an alum dosage of 45 mg/L; we maintained the same flow rate variation.The shear rate is shown in graph 1.
*Figure 1 *: Shear Rate
From the function and the graph, when the flow rate is 5mL, the shear rate will be 57.563 s-1
The following Process Controller method file was used to run the experiment:
Varying Flow rate