Background An Independent District Heating and Cooling Facility used a municipal Lake Michigan water supply to operate a reverse osmosis system with three 200-gpm trains and was experiencing high- pressure differentials and short runs between cleanings. The water had an SDI of 5–6 prior to the prefilters and © 2 016 Che mTre at, Inc. / 5640 Cox Road / Glen Allen, Virginia 23060 / www .chemtreat.com Optimizing Reverse Osmosis Me

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