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Thread: Question on after RO use rinse

  1. #1
    Join Date
    Mar 2015
    Location
    Peoria, IL
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    634

    Default Question on after RO use rinse

    Ok so after the RO runs out of sap I am initially rinsing the membrane for 3-4 minutes to remove residual sugar and sending this to the concentrate tank. After that then the full rinse. My question is with the what to do with any remaining liquid in the concentrate line that goes to the concentrate tank? Is the sugar level low enough after the 3-4 minute rinse to let it be till the next RO use? How much % sugar would be in there after such a rinse?
    Camp Wokanda
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  2. #2
    Join Date
    Oct 2007
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    Elliottsburg, PA
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    2,222

    Default

    For me I normally will check the liquid going to the concentrate to see the sugar content drop while pushing the remaining sweet out of the RO.
    For me this is about 1%, once I hit that I throw the valves and send it to drain for a few moments.
    Now I will do a True rinse and then if necessary a wash.

    I would not hold it till next time unless that next time is really soon, the sweeter the sap the faster it will start to go bad, and you do not want to add a little sap to a nice big load of fresh sap.
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  3. #3
    Join Date
    Feb 2017
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    eau claire
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    Default

    the chance of someone answering that and you testing it and getting the same result isn't good. you need a sap hydrometer and figure out your own conclusions. when i start tapering off in sugar % put some into a bucket to go back into the regular sap tank. the rest of the rinse water goes on the ground after the sugar is nil.
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  4. #4
    Join Date
    Dec 2002
    Location
    Rock Creek, NC
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    I check the sugar in my concentrate with a refractometer and when it gets down to less than .5% I consider the sugar flush done. It sometimes takes up to 10 minutes to get all of the sugar out. I let it flush for 5 minutes before I even start checking the sugar. I have my plumbing set up so that I can drain pipe from the head tank back into the RO room when I'm done with the flush. There isn't much sugar in it at that point so I just run that into the drain. I then do a soap wash and then a rinse.
    Russ

    "Red Roof Maples" Where the term "boiling soda" was first introduced to the maple world!

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  5. #5
    Join Date
    Sep 2010
    Location
    ontario
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    266

    Default Ro rinse

    How long does soap rinse take?
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  6. #6
    Join Date
    Dec 2002
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    Rock Creek, NC
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    5,807

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    Quote Originally Posted by butler View Post
    How long does soap rinse take?
    It depends on if you heat the wash water or let your RO heat it. On mine I've never timed it but it takes 2 or 3 hours. My RO will slowly heat the water as it is pumped through. Some RO's won't heat the water and you will need to heat it yourself. When it's up to temperature it doesn't take very long.
    Russ

    "Red Roof Maples" Where the term "boiling soda" was first introduced to the maple world!

    1930 Ford Model AA Doodlebug tractor
    A couple of Honda 4 wheelers
    Four chainsaws and no chickens!

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