Foam Filtration Pore Size
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The overall goal of the Foam Filtration Pore Size Team is to determine the most effective distribution of foam in the Foam Filter, in terms of depth and pore size. This will be done by researching the effect of the foam pore size on the filtration efficiency. Experiments with various foam heights combined with varying foam pore sizes will be conducted. From the analyzed data we hope to be able to find the optimum combination which results in the most efficient filtration. This will all be done considering several important filtration and water parameters. These include: the coagulant dose, the concentration of dissolved organics, the influent turbidity, the headloss, upflow velocity, etc. Spring 2015Our primary goal of the semester is to observe the efficiencies of the different pore sizes with respect to dissolved organics in the influent water. This was one of the primary ambiguities the Foam Filter Team observed when experimenting with the foam filter in El Carpintero, Honduras, this past winter. The team noticed that the discrepancies with the influent used to test the filter in the lab at Cornell were significant compared to the raw influent on site in Honduras. The coagulant doses needed to treat the water in Honduras were much larger than what was needed in the laboratory at Cornell. In addition the backwash efficiencies of the filter were staggeringly different. It is with this in mind that we plan to observe the efficiencies of the different pore-sized foam with an effluent that includes dissolved organics in addition to a set turbidity. We will use humic acid to imitate the . We will experiment with the various foam pore sizes (10 ppi, 30 ppi, 60 ppi, 90 ppi, etc.), as well as with varying coagulant doses and influent turbidities. This will allow us to observe the range of effectiveness each type of foam has according to the preset parameters. Once each individual foam pore size is tested, using the small Foam Filter experimental set-up, we will then test combinations of foam (two foam pore sizes layered, then three different foam pore sizes). This will give us ample opportunity to observe how each distribution of foam pore sizes behaves according to the dissolved organics. While we realize that the humic acid |