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In an optimized plant design, we would like to be able to manipulate geometry to reduce the required plan area. The best design would take advantage of placing the filter material in a vertical direction, with water flowing through the filter horizontally. Therefore, it is necessary to determine the filtering capacity of the foam material while in a vertical position, with water flowing through the column horizontally. To do this, we used the same experimental set up, and simply rotated the filter column onto its side. 
Figure 1: Horizontal Filtration Experimental Setup
Experiment 1
The graphs below indicate that horizontal filtration does not provide optimal performance, as compared to vertical filtration. The horizontal filter only achieves a pC* of .7 after 20 hours of operation, whereas the vertical filter achieves this after only 3 hours. This is a clear indication that horizontal filtration will not be able to meet the standards of achieveing a .9 pC* within a reasonable timeframe.
Figure 2: Horizontal Filtration Experiment pC* vs Time
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