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Currently, sampling takes place in three adjustable locations within the tank. Before analysis in the turbidity meter, the water enters a long glass tube which is meant to act as a "miniature sedimentation tank". However, previous testing has indicated that a significant amount of floc reached the turbidimeters. We would like to improve the method of sedimentation before the water gets to the turbidimeter.
A main goal of the testing is to develop a profile of floc formation along the length of the large-scale tapered flocculator.
If necessary, we may augment the turbidity level of the incoming water to simulate the higher turbidity levels found in Honduras.
We would also like to test a set-up that includes obstacles between the baffles. The idea behind this modification would be to make the velocity gradients more even throughout the sections. Previous AguaClara research has indicated that velocity gradients were much higher around the turns than along the length of the baffles.