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Thread: hodorskib's Small Scale RO Build

  1. #281
    Join Date
    Mar 2011
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    Greenwood, Me
    Posts
    974

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    So this happened...ran my Hod-Ro this season a few times, used the permeate to do my rinsing, leaving only a little trace in the tank, couple of cups....looked in the tank a little while ago, there's some mold in there. Does that mean my permeate wasn't as pure as I assumed? How would I measure that going forward?
    2024 - New Maine resident, 12X12 sugar shack under construction
    2019 - New 12X12 boiling pavilion
    2018 - New Mason 2X3 Hobby XL and homemade RO

  2. #282
    Join Date
    Mar 2010
    Location
    Oakville, CT
    Posts
    261

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    Sorry I haven't checked the site in a while. That happens to me as well so I try and clean my permeate tank as often as i can. I test it with my refractometer and although it reads 0 there is still trace elements of sugar and other minerals that can promote growth of bacteria and mold. Just as if you left water from your tap in an open container in a warm room eventually things would begin to grow.
    2' x 3' backyard evaporator with homemade steam hood
    38.5 gallons produced in 2022
    120 taps all on 3/16" tubing
    4" x 40" homemade RO built for 2023
    https://sites.google.com/view/mattat...aplesyrup/home

  3. #283
    vtbackyardmaple Guest

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    Looks like I will flip the pump as you're correct about my setup. Thanks a ton!!!! Gives me an opportunity to do put the 3rd one in.

  4. #284
    Join Date
    Mar 2011
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    Greenwood, Me
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    I re-flushed it out with my calcium hypochlorite and flushed it all out and let it air dry before putting the cap on. I've had tarps over the tanks all year long but will verify the lack of green soon (hoepfully). Now for an RO question.

    If I want to increase my throughput would I increase the size of my membranes or the pump I am using (150 gpd membranes and aquatec 8800)? If the pump, can someone recommend the higher pump?
    2024 - New Maine resident, 12X12 sugar shack under construction
    2019 - New 12X12 boiling pavilion
    2018 - New Mason 2X3 Hobby XL and homemade RO

  5. #285
    Join Date
    Jan 2018
    Location
    OH
    Posts
    174

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    Quote Originally Posted by eustis22 View Post
    I re-flushed it out with my calcium hypochlorite and flushed it all out and let it air dry before putting the cap on. I've had tarps over the tanks all year long but will verify the lack of green soon (hoepfully). Now for an RO question.

    If I want to increase my throughput would I increase the size of my membranes or the pump I am using (150 gpd membranes and aquatec 8800)? If the pump, can someone recommend the higher pump?
    I was able to increase the throughput by switching from 3x 150gpd membranes to 2x 400gpd membranes. I am using the 400gpd pump from https://www.therobucket.com/product/...d-transformer/
    He told me that pump is capable of pushing sap through up to 4 of the 400gpd membranes, and if you need more pressure then put a smaller 30psi pump in front of your prefilter.
    2021: 28 taps. 18"x36" flat pan and dual natural gas burners.
    2020: 31 taps. 3 full size steam table pans on a custom 6x water heater natural gas burner setup.
    2019: 31 taps on silvers. Back porch gas cook top with 2 full size steam table pans. An amazing 14.9 gallons in my backyard!
    2018: 22 taps on 9 silvers. Propane turkey fryer and full size steam table pan on electric stove. I made 4.25 gallons in my backyard!

  6. #286
    Join Date
    Apr 2013
    Location
    Speyside, Ontario
    Posts
    270

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    Quote Originally Posted by eustis22 View Post
    I re-flushed it out with my calcium hypochlorite and flushed it all out and let it air dry before putting the cap on. I've had tarps over the tanks all year long but will verify the lack of green soon (hoepfully). Now for an RO question.

    If I want to increase my throughput would I increase the size of my membranes or the pump I am using (150 gpd membranes and aquatec 8800)? If the pump, can someone recommend the higher pump?
    FYI you don't want to store your membranes dry. They should have a preservative that you rinse out before use.
    2015 - 8 buckets, 332L sap, 8.5L syrup - Barrel evaporator, 2 steam pans
    2016 - 8 buckets, 432L sap
    2017 - 10 bags, 470L sap, 9L syrup
    2018 - 20 bags, 1050L sap, 17.6L syrup
    2019 - 20 bags, 970L sap, 22.2L syrup
    2020 - 17 bags, 813L sap, 17L syrup

  7. #287
    Join Date
    Mar 2011
    Location
    Greenwood, Me
    Posts
    974

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    This is the 3rd year on these membranes and I've stored them in pvc tubes full of preservative all summer long but I think I will upgrade the membranes and pump as it takes me about 8-9 hours to process 50-60 gallons of sap at 100 psi. Thank you for the pump recommendation.
    2024 - New Maine resident, 12X12 sugar shack under construction
    2019 - New 12X12 boiling pavilion
    2018 - New Mason 2X3 Hobby XL and homemade RO

  8. #288
    Join Date
    Mar 2011
    Location
    Greenwood, Me
    Posts
    974

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    So I am getting the new membranes shortly (late, I know) and I have totally blanked on how you treat new membranes. Do I do a full wash or just a rinse on new ones?
    2024 - New Maine resident, 12X12 sugar shack under construction
    2019 - New 12X12 boiling pavilion
    2018 - New Mason 2X3 Hobby XL and homemade RO

  9. #289
    Join Date
    Mar 2010
    Location
    Oakville, CT
    Posts
    261

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    Sorry for the late response but my account was locked for some reason and was just able to get back in. For new membranes you can flush with clean, non-chlorinated water, for about 1/2 an hour. I do recommend doing a full cleaning though. I put new membranes in and there was still an off smell with just a rinse. The direction are here:
    https://sites.google.com/view/mattat...nes?authuser=0
    2' x 3' backyard evaporator with homemade steam hood
    38.5 gallons produced in 2022
    120 taps all on 3/16" tubing
    4" x 40" homemade RO built for 2023
    https://sites.google.com/view/mattat...aplesyrup/home

  10. #290
    Join Date
    Mar 2011
    Location
    Greenwood, Me
    Posts
    974

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    thank you....got instructions for your homemade steam hood someplace?
    2024 - New Maine resident, 12X12 sugar shack under construction
    2019 - New 12X12 boiling pavilion
    2018 - New Mason 2X3 Hobby XL and homemade RO

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