Membrane Storage Question

[ldick]

The instructions on the membrane preservative container say to drain the cylinder after pumping in preservative at end of season. Is this the best way to store it or should it be completely submersed?

[Russell Lampron]

I have always stored mine in the canister filled with permeate. This year I am going to leave it in the pressure vessel on the RO. I now have a room for the RO that is heated all winter.

[brookledge]

I take my membrane out of the tower and put it in my storage container. Then I mix a cup of preservative in 5 gallons of permeate pour into storage container and seal it up
Keith

[PARKER MAPLE]

Im going to fill my canisters with distilled water. Thanks Russ

PS anyone interested in 2 nf270-4040 4in membranes only used for 20min this year let me no. IM selling them and the 4in vessels.

[Maplewalnut]

I have always stored mine in the canister filled with permeate. This year I am going to leave it in the pressure vessel on the RO. I now have a room for the RO that is heated all winter.

Russ- you dont use preservative?

Mike

[Russell Lampron]

Russ- you dont use preservative?

Mike

No, no chemicals, just permeate.

[Homestead Maple]

No, no chemicals, just permeate.

And you don't have any bacteria problems? Is there any odor problems when you open it at the beginning of another season?

[Russell Lampron]

And you don't have any bacteria problems? Is there any odor problems when you open it at the beginning of another season?

I don't know about bacteria but there's no odor problem. I do an acid wash and then 3 soap washes before I remove and store the membrane. I run half of my permeate through the RO after the final wash and let it sit for a week then do a final flush with rest of it. This year I used the same procedure but am leaving the membrane in the RO.

[Homestead Maple]

I don't know about bacteria but there's no odor problem. I do an acid wash and then 3 soap washes before I remove and store the membrane. I run half of my permeate through the RO after the final wash and let it sit for a week

I would say that there isn't any bacteria then if you don't have any odor at the start of another season. The acid and soap washes must leave the inside of your membrane housing sanitary so bacteria doesn't grow. I went to Brad Gillilan's seminar today on RO care and some of the stories he told of sugar makers that didn't properly take care of the membranes at season end and the plugged membranes they ended up with. Leader has some very efficient RO's that they make now that were at Bascom's today.

[Dennis H.]

Ok I am bring this back to the front.

So it sounds like I need to do an acid wash then a soap wash then a really good rinse. Is this correct.

I was planning on making up 2 storage vessels out of 4" PVC, so after doing the above I should not have a problem with putting them in there and then filling it with permeate.