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More dye experiments were performed through the remainder of the Spring 2010 semester leading up to the EPA conference. The following images and video were captured during one of these experiments. It should be noted that the flow of water and dye through the rapid mix display tube were altered to provide a good visual, conceptual effect for these demonstrations. When operating as designed in AguaClara plants, the alum (represented by the dye) will immediately appear dispersed throughout the upper portion of the tube following the macro-scale mixing orifice; this scale tube produces this uniform mixing immediately when run using the same parameters it would encounter in plant flow, however, only photos of the display parameters are shown here:
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Figure 3. This video of the dye addition to the tube was performed in the AguaClara laboratory in Spring 2010 after the scale model of the tube was completed. It shows the addition and flow of dye through the tube over a period of time, allowing viewers to see the process and overall mixing occurring in both the macro and micro scale mixing portions of the tube.
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