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Using what we learned from our research, we developed a Mathcad file, which generate design parameters for our filtration/backwash system when provided with plant flow rate and properties of the granular filter. Besides being the basics for the final design of the filtration and backwash system for an actual AguaClara plant, this program would also generate parameters that we can scale down for bench-scale or pilot plant-scale testing.
Click here for the description of the MATHCAD file and description.

The accuracy of our Mathcad generated design parameters depend on the accuracy of the empirical fluidization velocity equations that we used. We developed a bench-scale model our filtration system and conducted an experiment measuring the expansion of a filter bed as backwash velocity is varied. We then compared the empiricially calculated fluidization velocities with the actual fluidization velocities required. Click here for the Fluidization Velocity Experiment.

The accuracy of our model also required for the headloss occurring through an expanded bed to be more or less constant. According to our research, headloss should be constant once fluidization of the bed is achieved irregardless of the degree of expansion. We simulated a variety of different bed expansion and observed headloss to be constant. Click here for the Expanded Bed Headloss Experiment.

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Plan of Action for Remainder of Spring 2010 Semester

As stated above, the The rest of the semester will be devoted to using the clear well technology applied to stacked filtration or other filter designs.