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Thread: Dumb question

  1. #1
    Join Date
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    Default Dumb question

    I know there must be a reason but Iím going to ask anyway.

    Getting ready, I did a wash and rinse on my RO today and wondered if I could run a solution of StarSan through to keep the membrane fresh in the stainless canister.

    I have Sodium Metabisulfite here but read not to use it unless I had a PVC storage container as it would corrode the stainless.

    Is StarSan not good for the membrane?
    Thanks.
    John Allin

    14x18 Hemlock Timber Frame Sugar House 2009
    Leader 2x6 w/Patriot Raised Flue Pan 2009
    Leader Steam Hood 2014 - Clear Filter Press 2015
    Leader Revolution Pan and SS Pre-Heater 2016
    CDL Hobby RO & Air Tech L25 Hi Vac Pump 2019
    06' Gator HPX to collect wood & sap
    14' Ski-Doo Tundra for winter work in the woods
    Great Family 3 grown kids+spouses and 7 grand kids who like the woods
    7th Gen Born in Canada - Raised in Chardon Ohio - Maple Capital of the World..<grin>.

  2. #2
    Join Date
    Oct 2006
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    Garrettsville,Ohio
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    Default

    i would try it on the clear press first as the cdl ro is much more valuable. *medium grin*
    Fred Ahrens
    330-206-1606
    Richards Maple Products
    Ohio CDL sales rep
    1500 taps

    dont take life too serious, nobody gets out alive anyways

  3. #3
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    Default

    I did give the clear press and good spray-down with StarSan when I cleaned up last April - I think it's a great application for it as it's one of my most valued pieces of Maple equipment. <big grin>

    Now getting back to the RO...

    I've been keeping the membrane in the stainless housing on the RO, filled with permeate and hoses closed off so it stays wet.

    Yesterday's wash was the first since the wash/rinse I did at clean-up last April. The membrane gets funky after a while and the Star San seems like it could be a good no-rinse solution to sanitize and store the membrane in the stainless housing without the hassle of washes, rinses and pvc storage tubes required with the Sodium Metabisulfite.
    Last edited by johnallin; 11-23-2020 at 02:30 PM. Reason: tick fred off ;)
    John Allin

    14x18 Hemlock Timber Frame Sugar House 2009
    Leader 2x6 w/Patriot Raised Flue Pan 2009
    Leader Steam Hood 2014 - Clear Filter Press 2015
    Leader Revolution Pan and SS Pre-Heater 2016
    CDL Hobby RO & Air Tech L25 Hi Vac Pump 2019
    06' Gator HPX to collect wood & sap
    14' Ski-Doo Tundra for winter work in the woods
    Great Family 3 grown kids+spouses and 7 grand kids who like the woods
    7th Gen Born in Canada - Raised in Chardon Ohio - Maple Capital of the World..<grin>.

  4. #4
    Join Date
    Oct 2006
    Location
    Garrettsville,Ohio
    Posts
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    Default

    dont know specifics about it. but it says its an acid i would say no if left in the shine high class tube
    Fred Ahrens
    330-206-1606
    Richards Maple Products
    Ohio CDL sales rep
    1500 taps

    dont take life too serious, nobody gets out alive anyways

  5. #5
    Join Date
    May 2009
    Location
    UVM Proctor Maple Research Center, Underhill Ctr, VT
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    5,186

    Default

    StarSan is a mixture of phosphoric acid (typically 75% or so) and Dodecylbenzene Sulfonic Acid (25%). DSA is added to the acid sanitizer in order to cut/dissolve oil and grease, which are not found in sap, so there is really no reason to use it compared to RO soap and acid (separately). I'd avoid it until/unless you pass it by the membrane manufacturer to see what they say.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
    https://mapleresearch.org
    Timothy.Perkins@uvm.edu

  6. #6
    Join Date
    Jan 2006
    Location
    Oneida NY
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    10,748

    Default

    I think you should store the membranes in a preservative sold by or recommended by your membrane manufacturer.
    Dave Klish about 400 taps, down from much more. Will hold about the same for 2021
    2012 Mahindra 36 HP 4x4/ loader/cab/heat/AC:-)
    3x8 raised flue evaporator
    250 GPH converted to electric, RO by Ray Gingerich
    6.32 KW solar system, 1.48KW is battery backed up, all net metered
    website: www.cnymaple.com

  7. #7
    Join Date
    Mar 2008
    Location
    Lake County Ohio
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    Default

    Quote Originally Posted by DrTimPerkins View Post
    StarSan is a mixture of phosphoric acid (typically 75% or so) and Dodecylbenzene Sulfonic Acid (25%). DSA is added to the acid sanitizer in order to cut/dissolve oil and grease, which are not found in sap, so there is really no reason to use it compared to RO soap and acid (separately). I'd avoid it until/unless you pass it by the membrane manufacturer to see what they say.
    Thank you Dr. Tim.
    Was pretty certain there was a reason.
    Although I won't pretend to understand the science; your explanation is what I was looking for. (made a lot more sense that Fred's ramblings about clear presses too...) <big a** grin>
    John Allin

    14x18 Hemlock Timber Frame Sugar House 2009
    Leader 2x6 w/Patriot Raised Flue Pan 2009
    Leader Steam Hood 2014 - Clear Filter Press 2015
    Leader Revolution Pan and SS Pre-Heater 2016
    CDL Hobby RO & Air Tech L25 Hi Vac Pump 2019
    06' Gator HPX to collect wood & sap
    14' Ski-Doo Tundra for winter work in the woods
    Great Family 3 grown kids+spouses and 7 grand kids who like the woods
    7th Gen Born in Canada - Raised in Chardon Ohio - Maple Capital of the World..<grin>.

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