Biofouling at a refinery User: ISO OCTANE, Dubai The refinery ISO OCTANE in Dubai, UAE is a rather small refinery. This refinery is not operating constantly, but is used only batch-wise. Due to this mode of operation, also the cooling loop is not running in full capacity all the time. The cooling loop is operated with limited water circulation, if there is no production in the refinery. During inspection of the cooling water system, there was found heavy fouling, caused mainly by organic material. This is called biofilm caused by biofouling. This fouling could be found in the entire system, this means all pipes, valves, cooling tower and heat exchanger. A typical origin of biofilm are dead ends or dead legs in the system. These are the critical parts in each water system. Once there is a b

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