PURATE SAVES $4 MILLION IN ONCE-THROUGH SEAWATER COOLING SYSTEM THE SITUATION A major refinery complex in the Middle East had a history of chronic leaks on the seawater heat exchangers of their once-through seawater coolingPurate’s bio-fouling control significantly improved heat transfer performance saving the customer $4 million annually. system. The leaks had been identified as being caused by under-deposit corrosion related to bio-fouling. Due to biological growth at the seawater inlet settling basin and the seawater outfall, performance was impaired as the bio-fouling cooling water flow rates were reduced in some of the critical heat exchangers. THE SOLUTION Nalco Champion assessed the situation from a Mechanical, Operational and Chemical (MOC) perspective and proposed the PURATE bioci

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