The polymer I have seen most ...
Published by Bob Foerster, Executive Director at Nevada Rural Water Association
The polymer I have seen most often used as a filter aid is the nonionic type. Very low doses are appropriate, balancing efficient removal and shortened filter runs. It is a trial and adjust situation. Suggest for any candidate product, jar test to mimic your upstream processes and then dose the supernatant and run it through membrane filter on the test bench to see how it behaves with respect to plugging.
Please be aware that the acrylamide monomer which is normally present in small amounts in polyacrylamides can be a contaminant if not kept to a minimum by controlling dosage.