Excessive sulfuric acid dosing resulting in irreversible scale formation

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Courtesy of American Water Chemicals, Inc. (AWC)

Many consultants in the RO water treatment industry recommend sulfuric acid dosing into the feed water as a safety measure. This case study reviews a situation where acid dosing was used with the intention of improving system performance but resulted in severe sulfate scaling. The difficulties in cleaning sulfate scales are discussed and after numerous lengthy trials, an effective cleaning procedure is found and implemented.

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