Method of bacteriostasis or disinfection for permselective membrane
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United States of America Patent
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Jun 1, 2004
Grant Date -
May 1, 2003
app pub date -
Aug 29, 2002
filing date -
Jul 21, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In the invention, the pipe lines around permselective membranes and the surfaces of permselective membranes are intermittently disinfected by adding an inexpensive acid such as sulfuric acid or the like to pre-treated crude water so as to make the water have a pH of 4 or lower. Accordingly, the invention provides a method of surely disinfecting the permselective membranes in membrane separation systems.
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