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Despite the consistency in blender methods, the experiment performed approximately the same as it did in Experiment 7. Again, A1 the 2.5 cm tube settler apparatus reached a pH of slightly greater than 12 while A2 the 5 cm tube settler remained closer to 11.6. After approximately 4 hours, A2 the 5 cm tube settler begins to steadily drop off. A2 It then continues a pattern of steady decline followed by a spike every 6 hours, at the time of the lime pulse. A1 . The 2.5 cm tube settler apparatus doesn't drop below a pH of 12 until approximately 22 hours into the experiment. However, A1 it then follows the same decreasing rise and fall curve with each lime pulse.
Figure 1 - Experiment 8
The purpose of this experiment was to continue pulsing in a lime stock solution but to improve the uniformity of the slurries by using the same blender procedure for each slurry.