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Ultimately, we would like the filtration unit to take up the smallest amount of planned area possible. Therefore, the flow rate through the filter was increased to 200 m/day, which is equivalent of reducing the top view area of the filter to half the original size. The influent raw water was kept as above, at 5 NTU with no without alum dosage.
Figure 3: Raw Water and Effluent Turbidity vs. time for a flow rate of 200 m/day
This graph indicates that the higher flow rate of 200 m/day increased the effluent turbidity to about 2 NTU. However, given the amount of planned space saved by this increasethe increased flow rate, this level of performance loss may be acceptable.
Figure 4: PC* vs. time for a flow rate of 200 m/day
As expected, the percent colloid removal decreased with the increase in flow rate. At 200 m/day, only about 40% of colloids are removed. Again, we would optimally like to acheive a percent colloid removal of about 90%, therefore, we will investigate foam with a higher ppi (smaller pore sizessize).