The relationship between the ratio of flow rates and pH
The lime feeder water flow rate required for the experiment was calculated with Mathcad. The analysis was made according with the dosage of lime, the operation time, water velocities, water pH and other variables, most of them were taken from the previous team report.
We assume the effluent pH of limefeeder is constant at 12.4, and the flow rate between lime feeder and plant changes from 10^(-5) to 0.01, we want to find the change of ANC and pH of raw water in the plant sensitivity to this ratio between flow rate.
Rright now we haven't taken into consideration the change of pH after addition of Alum. So the final ANC is affetced by the initial ANC caused by the hardness of raw water and the hydrogen provided by the limefeeder. 
Figure 1: Graph - Ratio of lime feeder flow rate to plant flow rate versus final ANC and pH
On this stage, the team also continued to search for other information including the cost of distilled water, lime properties (solubility with temperature), and Honduras' water regulation.