Chlorine dioxide - RO membranes - CEDI
Chlorine dioxide - RO membranes - CEDI
(OP)
Hi guys,
is anybody here present, who has experience with applying Chlorinedioxide for sanitizing RO membranes and CEDI systems (CDI systems)?
Thanks for answers and regards
from
Schulgarten- Austria
is anybody here present, who has experience with applying Chlorinedioxide for sanitizing RO membranes and CEDI systems (CDI systems)?
Thanks for answers and regards
from
Schulgarten- Austria





RE: Chlorine dioxide - RO membranes - CEDI
"Sanitization with agents containing combined chlorine is generally not recommended. FILMTEC membranes have shown some compatibility with pure chlorine dioxide. Chlorine dioxide that is generated on-site from chlorine and sodium chlorate, however, is always contaminated with free chlorine that attacks the membrane. One should consider DBNPA as a safer and more effective sanitizing agent for non-potable applications."
http://dowac.custhelp.com/app/answers/detail/a_id/...
RE: Chlorine dioxide - RO membranes - CEDI
I used a pilot plant with 4" filmtech membranes in the dairy industry. Chlorine dioxyde concentration was around 1 ppm. It worked fine.
I have no idea about CEDI with ClO2.
regards
RE: Chlorine dioxide - RO membranes - CEDI
RE: Chlorine dioxide - RO membranes - CEDI
some doc
http://www.membranes.com/docs/tab/TAB115.pdf
RE: Chlorine dioxide - RO membranes - CEDI
Thank you for the link! Useful and interesting. I have sanitízed RO membranes, a bit older and definite with biofilm. The biofilm was removed but rejection drop dramitcally. I am sure this was the influence of iron on the membranes. In another case we sanitized a larger system with quite new membranes and definite no iron with good success with about 3 ppm hour. No drop in rejection.
Thank you!
RE: Chlorine dioxide - RO membranes - CEDI
RE: Chlorine dioxide - RO membranes - CEDI
Kind regards from the alps and Vienna!
RE: Chlorine dioxide - RO membranes - CEDI
Tschussi !
RE: Chlorine dioxide - RO membranes - CEDI
I wish you a happy 2016 and happy engineering and of course successful projects!
Coming back on resin stabiltiy:
all resins are most stabile for any chemical, oxidation or hydraulic-osmotic shocks when fully exhausted and loaded with NaCl. In this case both cationic and anionic parts are fully loaded and shrinked - compareable to human in a safety position awaiting beasts, whatsoever.
We will definite in this state.
Regards from the Austrian alps - where at the moment it is more spring than winter....