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  1. Replies
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    727

    I don't know if anyone has ever done a soap or...

    I don't know if anyone has ever done a soap or acid wash on these home RO membranes. My recollection is that people were just replacing the membranes once the performance deteriorated. I would...
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    1,190

    I would contact Smoky Lake if it's not performing...

    I would contact Smoky Lake if it's not performing as expected. If there's an issue they deserve the chance to fix it. If the oil burner is burning clean with no smoke, it should perform pretty much...
  3. The least expensive option obviously is a better...

    The least expensive option obviously is a better pan on a block arch. A small evaporator such as a 1/2 pint or one of Bill Mason's evaporator's will be much more efficient (air tight) than the block...
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    653

    I let mine sit until it smells like vinegar,...

    I let mine sit until it smells like vinegar, usually 8-10 weeks. I drain it and then wash it out with a hose. I usually have to use a plastic scrubber to clean some of the areas. The deposits are...
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    2,304

    Yes. Different type pumps have very different...

    Yes. Different type pumps have very different curves or pressure/flow relationships. The ProCons are considered positive displacement and show very little difference in flow vs pressure. A...
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    2,304

    Your explanation looks pretty accurate too me. i...

    Your explanation looks pretty accurate too me. i would add one more benefit of recirculation. Recirculation allows the sugar concentration to be more uniform across the entire membrane and therefore...
  7. Using RO to remove water from sap is pretty fool...

    Using RO to remove water from sap is pretty fool proof and about any combination will work after a fashion. There are some things to avoid because you can damage the membrane or destroy the membrane....
  8. Thread: best set up

    by bowhunter
    Replies
    13
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    1,206

    It's going to be pretty small. Maybe a 400 gpd...

    It's going to be pretty small. Maybe a 400 gpd membrane? The motor size doesn't always tell you the size of the pump. There should be a ProCon model number on the pump. You will need that to...
  9. Thread: RO storage

    by bowhunter
    Replies
    5
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    640

    It's generally a 1 weight % solution of sodium...

    It's generally a 1 weight % solution of sodium metabisulfite in water.
  10. Thread: RO storage

    by bowhunter
    Replies
    3
    Views
    622

    I use a 1 weight% solution of sodium...

    I use a 1 weight% solution of sodium metabisulfite in water. I believe this is pretty standard.
  11. I spent about 3 months developing a tool in an...

    I spent about 3 months developing a tool in an EXCEL spreadsheet that I use on the forum to estimate sizes for people wanting to build their own or troubleshoot problems with their existing system....
  12. You are correct the about the recovery and also...

    You are correct the about the recovery and also about the series vs. parallel configuration.
  13. Thread: RO question

    by bowhunter
    Replies
    29
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    9,205

    You should be able to get by with a 2 hp. 2 hp is...

    You should be able to get by with a 2 hp. 2 hp is what ProCon recommends for that pump.
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    477

    I only have 130 taps or so but I'll give you my 2...

    I only have 130 taps or so but I'll give you my 2 cents worth. I run once through on my RO going from a little less than 2% sugar to 8-10% sugar in one pass. I don't store concentrate because it...
  15. Thread: RO question

    by bowhunter
    Replies
    29
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    9,205

    They make this confusing and I'm not sure why the...

    They make this confusing and I'm not sure why the model number suggests it's non food grade, but on ProCon's NSF/ANSI 169 listing for Special Purpose Food Equipment they state that all Stainless...
  16. Everything you have looks good and is close...

    Everything you have looks good and is close enough for this kind of project. Step 2 is an approximation which as I said is ok for this kind of project since the mathematically correct calculation...
  17. Thread: RO question

    by bowhunter
    Replies
    29
    Views
    9,205

    Two 4x40 XLE's in series with a 330 pump should...

    Two 4x40 XLE's in series with a 330 pump should do what you need. You only need to do about 65% water removal to get up to 8%. With this set up you can feed about 125 gph of sap at 3% and make about...
  18. Replies
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    603

    Be careful letting the membrane sit very long in...

    Be careful letting the membrane sit very long in a high pH wash. Most membrane manufacturers would recommend against it... one or two hours maximum. High pH will eventually destroy the membrane. The...
  19. Replies
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    708

    Cold sap permeates much slower than room...

    Cold sap permeates much slower than room temperature water but, I'd guess you damaged your membranes with hot permeate and there's probably no answer but to replace them. Do a soap wash and run the...
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    884

    You could have collapsed the filter into the...

    You could have collapsed the filter into the ProCon pump inlet or the pump could be running backwards if the motor isn't wired correctly. I would also still be suspect of the membrane and the...
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    884

    I agree. It sounds like you don't have a needle...

    I agree. It sounds like you don't have a needle valve after the membrane on the concentrate side only. Never put any restriction on the permeate side of the membrane. You should be able to generate...
  22. Thread: Squirrels

    by bowhunter
    Replies
    16
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    1,468

    The squirrels kept coming back in the same areas....

    The squirrels kept coming back in the same areas. I probably had 30% of my drops damaged.. most still worked fine with no leaks. I've never had a tooth mark on my drops before this year. Funny how...
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    46,996

    As the membranes foul you will get less permeate...

    As the membranes foul you will get less permeate while operating at the same pressure. It get's more difficult for the water to permeate through the membrane from the concentrate side to the permeate...
  24. Replies
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    781

    I wouldn't let the sap sit for a week if I could...

    I wouldn't let the sap sit for a week if I could help it particularly if the day time highs are in the 50's. With a small 2x3 evaporator you probably can only boil about 5 gallons per hour so 40...
  25. Thread: Temp Drop

    by bowhunter
    Replies
    9
    Views
    457

    I have a 1/2 pint which is a little smaller than...

    I have a 1/2 pint which is a little smaller than a 2x3. It is really hard to finish syrup on it and what usually happens as you get to almost syrup the syrup side starts to foam and then you get a...
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