If we assume that the ...

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If we assume that the filtration system is designed properly, then looking at the performance of the media itself for removing TSS, Turbidity, and SDI. Commercial sand media at a feed of 31 mg/l removes 23 mg/l and for SDI feed of 0.40 removes 0.38. We have a product called High-Efficiency Media with the same above criteria removes <5 mg/l of TSS and SDI of 0.18. Therefore, the media plays an important rule in how much you can remove.

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Dear Ken: Thank you very much for the follow up on this question. Please read my comments  for Peter.

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The numbers I gave you were tested without polymer. I used a commercial sand filter after a clarifier which used polymer for removing heavy metals like Cu. In that project, Cu was tested as ND. However, we did not test for SDI or TSS.  Therefore, you must test your theory before concluding that it does not work. 

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