Hi Nadeem Yes, it would be ...
Published by Nick Nicholas, App Eng/Technical Director at Genesis Water Technologies, Inc.
Hi Nadeem
Yes, it would be beneficial to know what is causing the SDI, which as Ian Pearson mentioned could not be visible with your eyes. Adding a anionic flocculant with the cationic flocculant could work. However, you have to make sure the flocculant/coagulant is safe for RO membranes. Yes, pretreatment filtration could be adjusted as well from sand to zeolite for more efficient filtration.