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This trial was carried out using distilled water to determine how long the experiment would last without the influence of carbonates (present in tap water). In addition, another parameter that was inadvertently changed was the brand of lime, since the previous supply of lime was depleted. The new lime brand had 70% calcium hydroxide compared to the older lime containing 96% Calcium Hydroxide. (Were there other distinguishing factors of the new brand of lime? Maybe a list of chemicals and % composition for each would be helpful especially comparing hydroxides and bicarbonates) Thus during this trial, not only was the effect of water quality was evaluated but also the effect of lime quality was evaluated. For this trial the pH remained stable at 12 for just 3.5hours5 hours.
INTRODUCTION
For this trial tap water was replaced by distilled water. In addition, the lime was changed, looking for a better quality of the compound. \ The apparatus was kept the same as for the previous two trials.
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One, that the distilled water made little impact on the working of the lime feeder. Despite the results, is it was necessary to figure out the reasons. If effectively Either the distilled water has not eny effect; or if the distilled water used had any had no effect on the limefeeder or it had an impurity.
Second, the decrease in efficiency of the system was due to the fact that a different lime quality was used and did not match the hypothesis on which the design was based.
Further experiments are needed to probe or reject the distilled water hypothesis. Is It is necessary to check the performance of the experiment with the first lime brand and distilled water, and with the second lime brand and tap water. Those results will provide comparable parameters.