Cleaning

Cleaning procedures for hydrophobic membranes impose specific problems, particularly in processes involving fats and proteins that can adhere and foul the membrane, or alcohols and surfactants that can cause leakage. The most effective cleaner for membranes with a surface tension greater than 23 mN/m was 1% NaOH. The most effective cleaner for membranes with a surface tension less than 23 mN/m was P3 Ultrasil 56; water vapor flux was maintained and there was not salt leakage during repeated fouling/ cleaning runs [26].

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