Membrane Storage Question

[wiam]

If it is flowing as good after the last washes as at the start of the season you should be good. You should add storage solution to the permeate in your storage vessels( available at maple dealers)

[VT_K9]

We ran our RO last year for the first time and took the membranes to CDL to have them cleaned and setup for storage. How often do you need to have them cleaned and tested versus cleaning them and storing them yourself? I don't mind a little over doing and don't want to get caught with bad membranes.

Mike

[hughes53]

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.

I am interested and would like to know what you want for them. Thanks, Brian

[sapman]

I took my membrane back for cleaning a few years ago. They ended up not really getting it any better than I did.

[hughes53]

I am interested in your nf270 membranes . You can contact Hughes 53 in a private message. Thanks.

[Dennis H.]

Ok did a little research and found that the chemical that is used for storage is sodium Metabisulfite.
It is used in the food industry as a preservative and also when making beer and wine.

My question is how much to use? This seems to be the same stuff that Leader sells but I can not find anywhere the amounts to use.


The place that I found that has it and will ship it is Duda Diesel, 1lb package is $7.95 and shipping is free.

[batsofbedlam]

Any wine and beer making store carries this. The dosage amount is right on the Leader package.

[TRAILGUY]

I have a 250 deer run 1st year . for storeage
END OF YEAR CLEANING
1. Do a soap wash,
2. Do a acid wash,
3. Do a soap wash
4. Do a rinse.
5. Fill wash tank with clean water. Then add preserue to wash tank. Let recirulate for 5 min. Follow directions on jar. Store R.O. With this preserve in the membranes. Never let membrane dry out. Store in a cool dry place in summer. Do not let freeze in winter. It is best to store membranes in machine.

Then I moved it down the stair into my basement to store where heated. Never again!!! Anyone have a 250 deer run and what are you doing?

[Dennis H.]

Did a little searching and found that the amount of Sodium metabisulfite is 1/8 cup to 1 gal of permeate. For a larger batch it is 1/2 cup of sodium metabisulfite to 4 gals of permeate.

[lastwoodsman]

I have Deer runs 125 Hobby, after final wash and rinse, I add 1 tablespoon preservative to the 5 gallon tank and let recirculate for 5 minutes as per instructions. Leaving membrane immersed in unit container and store unit in my heated garage during the winter. Not a problem with it this spring coming out of storage and following first run instructions.