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Throughout the fall of 2014, I worked on the enclosed stack rapid sand (EStaRS) filter apparatus to obtain turbidity data and find the limits of its backwashing capabilities. After extensive trouble-shooting to get the filter back to a state of consistent functioning, my team and I ran many trials of forward filtration at a high clay turbidity of ~500 NTU. We recorded the points at which the current filter design needs to be backwashed and analyzed the effectiveness of backwash. We also designed a new inlet system to allow for multiple EStaRS filters to run in parallel without increasing head loss.
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