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One, that the distilled water made little impact on the working of the lime feeder. (Again this could be due to the fact that the distilled water, though stored in a closed plastic container was kept so for more than 3 weeks, which resulted in a leakage of Carbon dioxide through the plastic walls so that in effect the distilled water was no better than tap water after a long duration.) Second, the decrease in efficiency of the system was due to the fact that a different quality of lime was used which did not match the hypothesis on which the design was based.
FUTURE TASKS
It thus remains to be evaluated if the design and the calculations made so far are acceptable for different types of lime with different solubility characteristics in water. It also needs to be verified if the quality of water has a strong influence on the pH behavior or not.
To make these evaluations, it is necessary to run more trials on the experiment using the new lime but with tap water; and using the old brand of lime with distilled water.