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The pH of calcium Hydroxide or lime decreases with an increase in pH. (see figure 1 below)
PROCEDURES AND RESULTS
One of the first tasks was to calculate the dosage of lime required by the lime feeder and the relationship between the changes in pH and ANC with changing flow rates in the lime feeder. The
analysis of lime feeder requirements was made with the help of MathCAD software.
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- Run several trials with the new design to determine the amount of lime required to maintain a pH of 12 for 24 hours. In addition the performance of the new design will be evaluated and revised, if necessary.
- Simulate Honduran water conditions. Once the lime feeder design is working successfully with distilled water, a new experiment will be required to analyze the performance with a lower pH concentration.
- Recalculate design dimensions while taking into account the natural variation of flow rate at the inlet tank in the water treatment plant.
!pH changes with Temperature - Lime.JPG!