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Thread: Ro connections

  1. #1
    Join Date
    Jan 2016
    Location
    durham ontario Canada
    Posts
    34

    Default Ro connections

    Many of the drawings that I see for multi membrane set up ro units have the out put from one canister to the inlet to the next housings . I知 wondering what痴 the plus and negatives of series or parallel connections?? This is going be my first ro set up and I知 almost certain that my 3 -400 gpd set is going be undersized. I値l be looking at how to remove as much water as possible from a bulk tank and not as much worried about getting crazy high sugar %.


    Thank you everyone as always for your advice
    2014 100 taps 65 l of syurp
    2015 50 taps 20 l of syurp
    2016 150 taps, 160 l of syurp made
    2017 plan is 150 taps , and will see what happens
    2018 200 tap , 25 on my first 3/16 gravity system, 250 of syrup
    2019 250 taps , all on 3/16 with 12 volt diagram pump ( 300 l of syrup)
    2020 same 250 taps , time to make a small ro unit

  2. #2
    Join Date
    Sep 2015
    Location
    Rumney NH
    Posts
    49

    Default

    cat tech
    "I値l be looking at how to remove as much water as possible from a bulk tank and not as much worried about getting crazy high sugar %."

    as you remove the water the sugar content will rise. parallel connections will remove say half the water in one pass taking 2% to 4%. but to get more water out you would have to run the concentrate again. membranes in a series, each membrane takes out more water. so in one pass, you could take three-quarters of the water out. making your 2% to 6-8%. just an example
    2017 140 taps 30x8 12x16 shack 28.5 gal
    2018 158 taps 30x8 12x16 shack with 8x8 kitchen 44 gal
    2019 223 taps 30x8 12x16 shack with 8x8 kitchen 36 gal
    2020 30x8 12x16 shack with 8x8 kitchen 250 waterloo ro

  3. #3
    Join Date
    Feb 2019
    Location
    Murrysville, Pennsylvania
    Posts
    60

    Default

    amasonry is correct. Remember also that volumetric flow rate of the concentrate and permeate are each half of the input. That said, if you do a series set up, you do not need all the same gpd ratings. You can effectively cut those in half for each additional membrane. So 400 --> 200 --> 100.

    Conversely, if you were to run 2 of the 400 gpd membranes in parallel, combine their outputs into your 3rd membrane you would be fully utilizing each of their 400 gpd flow ratings. This is known as a 2 stage set up and it's very effective.

    RO_Membrane_One_Two_Stage.jpg

  4. #4
    Join Date
    Jan 2016
    Location
    durham ontario Canada
    Posts
    34

    Default

    That痴 a great suggestion d. Roseum, 2 membranes in parallel feeding my last membrane in series . Sound like a perfect way to get the best out of the equipment I have on hand .

    Thank you
    2014 100 taps 65 l of syurp
    2015 50 taps 20 l of syurp
    2016 150 taps, 160 l of syurp made
    2017 plan is 150 taps , and will see what happens
    2018 200 tap , 25 on my first 3/16 gravity system, 250 of syrup
    2019 250 taps , all on 3/16 with 12 volt diagram pump ( 300 l of syrup)
    2020 same 250 taps , time to make a small ro unit

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