The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2018
Filed:
Dec. 19, 2012
Applicant:
Kemira Oyj, Helsinki, FI;
Inventors:
Jussi Salonen, Helsinki, FI;
Marko Kolari, Vantaa, FI;
Mehrdad Hesampour, Espoo, FI;
Kaj Jansson, Tampere, FI;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 65/02 (2006.01); C02F 1/44 (2006.01); B01D 65/08 (2006.01); B01D 61/02 (2006.01); B01D 61/04 (2006.01); C02F 1/72 (2006.01); C02F 1/68 (2006.01); B01D 15/00 (2006.01);
U.S. Cl.
CPC ...
B01D 65/08 (2013.01); B01D 61/025 (2013.01); B01D 61/04 (2013.01); C02F 1/441 (2013.01); B01D 2321/162 (2013.01); C02F 2303/16 (2013.01);
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.