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For example, the Column model succeeded in keeping the lime suspended for a few hours but the water began to flow in a preferential path after the lime settled on the bottom. For the conical column, the mixing at the bottom of the vessel proved to be inefficient in keeping all the lime in a suspended state. On the other hand, the funnel-column apparatus worked well for 20 hours but only because it was unclogged periodically, which would not possible in a real-time set up. As a result, the inverted cone model that gave a 12 hour success run, without the above difficulties was selected as the best alternative among them. However, due to the difficulty in construction, installation, and maintenance, the ANC team was assigned the task of searching for a simpler solution for the lime feeder design.
ALKALINITY IN HONDURAN WATER
The table below shows actual measures of pH and alkalinity in AguaClara treatment plants in Honduras. To have high accuracy in the lime feeder design, the team will simulate the conditions of raw water in the lab.
PROPERTIES OF LIME
EXPERIMENTAL METHODS AND RESULTS
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The final target for this duration is 24 hours so that the operator at AguaClara plants in Honduras need only refill the lime feeder once a day. For this trial, distilled water will be used instead of tap water to better simulate Honduran water. In the picture below (figure 4), the ANC Control team can be seen carrying the distilled water tank on to the platform where the experiment is to be set up.
Figure - 4
!TABLA HONDURAS.jpg|align=centre!