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Thread: 400 gpm RO

  1. #11
    Join Date
    Feb 2017
    Location
    NY
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    79

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    Parallel or series will give you the same flow rate (gallons per hour). Series will allow the batch to flow across all three membranes, which reduces fouling and helps keep the membranes flushed. There is no benefit to a parallel configuration in these little systems.

    Running a series system from 2-4% will be the same flow rate as running a parallel system from 2-4%. With a series system, you can run the water a little faster than the concentrate (but you wouldn't have to), and you could get a higher single pass concentration with less likelihood of fouling membranes (than a parallel system). Each 400gpd membrane will pass 4 gallons of water per hour at sap temp and 100psi (less than 100psi is not really satisfactory).

    The aquatec 8800 is really only capable or running up to 600-800 gpd of membranes. The flow rate at 100psi is only around 16gph. The 8855 series could run three. Plan on about 24gph with 3 400gpd membranes and a sufficient pump (making 12gph of concentrate and 12gph of permeate). If you get to 150psi you might be able to do a little better (but the 8800 will probably only make 80-100psi with three membranes).

  2. #12
    Join Date
    Jun 2020
    Location
    Norway, Maine
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    38

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    Quote Originally Posted by carls47807 View Post
    Parallel or series will give you the same flow rate (gallons per hour). Series will allow the batch to flow across all three membranes, which reduces fouling and helps keep the membranes flushed. There is no benefit to a parallel configuration in these little systems.

    Running a series system from 2-4% will be the same flow rate as running a parallel system from 2-4%. With a series system, you can run the water a little faster than the concentrate (but you wouldn't have to), and you could get a higher single pass concentration with less likelihood of fouling membranes (than a parallel system). Each 400gpd membrane will pass 4 gallons of water per hour at sap temp and 100psi (less than 100psi is not really satisfactory).

    The aquatec 8800 is really only capable or running up to 600-800 gpd of membranes. The flow rate at 100psi is only around 16gph. The 8855 series could run three. Plan on about 24gph with 3 400gpd membranes and a sufficient pump (making 12gph of concentrate and 12gph of permeate). If you get to 150psi you might be able to do a little better (but the 8800 will probably only make 80-100psi with three membranes).
    Great info carls47807, really appreciate the feedback. If I am trying to match my 15-20 gph rig, how could I successfully build a system that would process that even if it were at a lower concentrate level? Maybe multiple pumps and 4 membranes? Because I am a weekend warrior unless we get a really big run and I go up mid-week, my RO has to do a fairly good job of keeping up. I could mix it obviously with regular sap, and maybe that's the answer, but if I at least wanted to take off half the water what would be your suggestion?

    Thanks!

    Tucker
    Tucker Adams

    2022 - Planned Sugar House Build from Old Timbers (Stay Tuned!)
    2021 - 64 Taps in Norway, ME (mostly on 3/16 tubing) - 16 gallons with a 225 gallon sap donation.
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  3. #13
    Join Date
    Feb 2017
    Location
    NY
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    You could run two aquatec 8800 pumps, with 2 membranes on each (two separate systems basically). RO Bucket (me, but I am not soliciting), sells a 40gph booster pump that pairs well with 3 membranes. Also have a 60gph pump that can run up to 5 membranes. Again, each membrane will get you 8gph. Hope this helps!

  4. #14
    Join Date
    Apr 2018
    Location
    Tioga county, Pennsylvania
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    14

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    Take a look at Mattatuckmadnessmaple.

    He has a lot of useful info on these small systems. He is a member on here, so you can probably find it using the search engine on here. I think his user name is something like hubador.

  5. #15
    Join Date
    Dec 2015
    Location
    Weston, CT
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    262

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    Quote Originally Posted by Muddy Bottoms View Post
    Take a look at Mattatuckmadnessmaple.He

    He has a lot of useful info on these small systems. He is a member on here, so you can probably find it using the search engine on here. I think his user name is something like hubador.
    Mattatuckmadness also uses series and discourages the use of parallel. I think he uses 5 or 6 150GPD in series.

    Another benefit to series is that you can more effectively rotate membranes between runs from first to last down the line so you even out fowling of each membrane.
    If you think it's easy to make good money in maple syrup .... then your obviously good at stealing somebody's Maple Syrup.

    Favorite Tree: Sugar Maple
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    40 Sugar Maple Taps ... 23 in CT and 17 in NY .... 29 on gravity tubing and 11 on 5G buckets ... 2019 Totals 508 gallons of sap, 7 boils, 11.4 gallons of syrup.
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