Editor-in-Chief Elisabeth Lisican showcases a handful of features to read in the April 2017 issue of Water & Wastes Digest.
RO membranes work at the ionic level, which is 12 orders of magnitude smaller than a grain of sand. A pre-treatment system must be in place to prevent these potentially damaging particles from coming in contact with membrane surfaces. Orival Inc. provides automatic filters for RO pre-treatment. Sizes range from ? in. to 32 in. with screen apertures down to 5 microns.