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Figure 1 shows that after about five hours of operation the foam filtration system achieved a pC* of greater than 0.9, or an effluent turbidity of less than one. The performance of the foam increased almost linearly over time, again proving that the film on top of the foam increases filter performance. In later experiments, we will determine how long performance will increase before leveling off, and how head loss through the system is affected by the film on top of the foam. 
Figure 1: pC* vs. Time
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