Tanya's Individual Contribution Page

Spring 2009

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Semester Contributions

For the past semester, I have been working on the Dissolved Air Floation of Flocs team. Originally, I was involved with the Aeration subteam; however, with the dissolution of that group (due to the conclusion that the method was ineffective) I have joined the Sand Filter team. Currently, the bulk of my work involves experimenting with dissolved oxygen removal from super saturated water by running supersaturated water through a back washed sand filter. Thus far, it seems that the method can effectively remove the excess DO in the water. While the method seems very promising, some problems have arisen. One problem is that the glass beads we are using are so small that they are being carried away by the bubbles. Because of this, we plan to experiment with different grain sizes of sand in order to minimize sand loss and to observe the effect of sand size on bubble formation. Haley and I spoke with Professor Stewart in the Geotechnical department and obtained a mix of soils. We then sieved the soil out, obtaining a fairly good distribution of sizes that are currently being tested.

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