WATER & WASTEWATER MANAGEMENT


Greg Wainhouse discusses how to improve the quality control of process water and extend reliability


F


ood and beverage manufacturers use reverse osmosis to purify process water, which may originally come from either the mains supply


or a borehole. In either case, the objective is to produce a consistently high-quality water supply for the manufacturing process. Sampling and testing of the water is crucial to achieving this, so


36 www.engineerlive.com


MONITORING REVERSE OSMOSIS SYSTEMS


improving accuracy and consistency has major benefits. Reverse osmosis (RO) uses pressure to


force water through a membrane, leaving salts and dissolved solids behind. Te process delivers consistently high-quality water, provided the membranes do not become blocked or breached, allowing impurities to pass through.


CONVENTIONAL MONITORING RO on an industrial scale uses banks of membranes connected in parallel to maximise the volume of water being purified. Te water quality is monitored using various methods, depending on the needs to the manufacturing process. Te most common arrangement is the use of differential pressure sensors on either side


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