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Application Bulletin: Pall Aria™ Quadruples Process Uptime Of RO Unit
The corn wet milling and refining industry requires high amounts of steam for a variety of purposes, including steeping, drying, various evaporation steps, maintaining process temperatures, as well as fermentation, extraction, ethanol recovery, and starch conversion. RO-purified, treated water is supplied to the steam boilers to ensure that scaling on the water side of the boilers is avoided, to maximize energy transfer. A CIPEC (2001a)1 report indicates that 1 mm of scaling build-up on boiler surfaces can increase fuel use by 2 %. Measures to reduce energy use are a continual focus in this energy-intensive corn wet milling industry.
RO water is additionally used at the corn refining plant as source water for various washing and elution steps in ion exchange columns to avoid resin fouling with unwanted particles, metal ions and other contaminants. It is also required for cooling unit loops and other process areas within the plant.
RO membranes are sensitive to fouling due to inadequate feed water quality. Membrane fouling causes reduced performance, additional energy demand due to differential pressure increase, excessive need for cleaning, and premature membrane wear.
A Pall Aria microfiltration (MF) system provides a cost-effective and sustainable solution for optimally protecting downstream RO membranes.
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