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Thread: Reverse osmosis cleaning

  1. #1
    Join Date
    Jan 2016
    Location
    Branchville, New Jersey
    Posts
    4

    Default Reverse osmosis cleaning

    Just built a homemade RO this year using a hydranautics 4x 40 espa2 membrane. Any advice on year end cleaning tha membrane.

  2. #2
    Join Date
    Jan 2006
    Location
    Oneida NY
    Posts
    11,547

    Default

    I'm not familiar with that membrane, but if you send a request by email to me dave@cnymaple.com I will send you a manual that may help a lot. It outlines how to do each step on most RO's.
    Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
    Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
    Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
    After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.

  3. #3
    Join Date
    Feb 2013
    Location
    Marysville, Ohio
    Posts
    663

    Default

    I would contact hydranautics directly for their recommendations. I just took a look at some of their older technical bulletins. Their cleaning procedures are much milder and use different cleaning chemicals than Dow recommends for the Filmtec membranes. For example Hydranautics generally clean in the 4-9 pH range where the other manufacturers recommend up to pH 12. They are very explicit that going outside these recommended pH ranges can damage their membrane.
    Leader 1/2 pint - Kawasaki Mule - Smoky Lake Filter Bottler
    24 GPH RO, 2 1/2 x 40 NF3 (NF270), 140 GPH (Brass with no relief valve ) ProCon pump
    2013 - 44 taps - 16 gallons syrup, 2014 - 109 taps - 26 gallons syrup
    2015 - 71 taps - 13.5 gallons syrup, 2016 - 125 taps - 24.25 gallons syrup
    2017 - 129 taps - 17.5 gallons syrup, 2018 - 128 taps- 18 gallons syrup
    2019 -130 taps - 18.5 gallons syrup, 2020 ~125 taps-19.75 gallons syrup

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