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US 10,675,589 B2Granted
Cleaning of water filtration membranes
AssigneeNovozymes A/S
InventorsRasmus Rune Hansen, Ethan Baker
Life of this patent
Estimating the term…
Abstract
Methods for cleaning water filtration membranes by treatment with a DNase containing cleaning composition. Optionally the composition also comprises a biocidal and/or other enzymes such as proteases. The DNAse may be derived from Aspergillus oryzae or from Bacillus licheniformis.
Claims16
A method for cleaning a water filtration membrane, wherein the water filtration membrane comprises a biofilm, the method comprising
- i) contacting the membrane with a liquid cleaning composition comprising a DNase and one or more non-DNase enzymes selected from arabinose, carbohydrase, cellulase, cutinase, galactanase, lipase, mannanase, oxidoreductase, pectinase, pectate lyase, perhydrolase, protease and xylanase;
- or
- ii) contacting the membrane with a liquid cleaning composition comprising a DNase, and separately contacting the membrane with one or more non-DNase enzymes selected from amylase, arabinose, carbohydrase, cellulase, cutinase, galactanase, lipase, mannanase, oxidoreductase, pectinase, pectate lyase, perhydrolase, protease and xylanase.
Dependencies are inferred from the claim text.