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The alum dose was varied in process controller using the increment function shown in Figure 1:
FIGURE 1: Process Controller setpoints used to vary the alum dose.
The following Process Controller Files were used in our experiments:
5 NTU One Length Test File
5 NTU Three Length Test File
25 NTU One Length Test File
25 NTU Three Length Test File
50 NTU One Length Test File
50 NTU Three Length Test File
100 NTU One Length Test File
100 NTU Three Length Test File
500 NTU One Length Test File
500 NTU Three Length Test File