Method for preventing microbial growth on a filtration membrane
OwnerJussi Salonen, Marko Kolari +2inventors
InventorsJussi Salonen, Marko Kolari, Mehrdad Hesampour, Kaj Jansson
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Abstract
The present invention relates to a method for preventing microbial growth on a filtration membrane during desalination process. The method comprises that the membrane is exposed to a low concentration of performic acid by continuously or intermittently introducing performic acid to the membrane surface. When performic acid is added according to the present invention to the water flow, there is no significant reduction in the water flux through the membrane.
Claims7
A method for prevention of microbial growth on a filtration membrane in a desalination system during a desalination process of sea water or brackish water, the method consists of exposing the filtration membrane to performic acid by continuously or intermittently introducing 0.4-1 mg/l performic acid to a sea water or a brackish water flow contacting a membrane surface of the filtration membrane at the same time as the desalination system is functioning without interruption, wherein a water flux through the membrane remains greater than 85% of an original water flux throughout the desalination process.
A method for prevention of microbial growth on a filtration membrane in a desalination system during a desalination process of sea water or brackish water, the method consists of exposing the filtration membrane to performic acid by continuously or intermittently introducing 0.4-1 mg/l performic acid to a sea water or a brackish water flow contacting a membrane surface of the filtration membrane at the same time as the desalination system is functioning without interruption, wherein a saline water flux through the membrane remains greater than 85% of an original water flux throughout the desalination process, and wherein performic acid does not damage the filtration membrane.
Dependencies are inferred from the claim text.