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Thread: CDL hobby working slow

  1. #1
    Join Date
    Apr 2017
    Location
    Pittsfield, NH
    Posts
    38

    Default CDL hobby working slow

    We've got a cdl hobby 250 thats performing like a single post 125. The saps been cold but shouldn't make that much a difference. The membranes are a season and a half old. We wash it like normal. Any ideas?
    Matras Maple

    Started 15 years ago as backyard operation.
    Now have a 1100 taps and growing. CDL hobby 250 ro.
    New for 2018, a 2.5x8 leader infurno with steamaway.

  2. #2
    Join Date
    Apr 2005
    Location
    Cayuta NY
    Posts
    751

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    What are the flow rates when you benchmark the RO? If the benchmark has dropped by 15% of the flow when new, and the flow doesn't return after a regular soap wash you might need to do an acid wash on the membranes. I noticed my RO flow rates were dropping off and that is my plan once I get sap to concentrate and permeate to rinse with.
    Jeff

    470 taps
    Kinney KS-15 High Vac with Lapierre Horizontal releaser
    Leader 2x6 Patriot raised flue
    Leader 2x4 Steamaway
    Wildfire arch
    MES Dolly 300 3 post RO
    Sheets 5" Filter Press with air pump
    and still lookin to get bigger

  3. #3
    Join Date
    Apr 2017
    Location
    Pittsfield, NH
    Posts
    38

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    When it was normal it put out 2 gpm each for concentrate and permeate. Now its at around 1 gpm each. How do you do an acid wash? The same as a soap wash? What kind of acid?
    Matras Maple

    Started 15 years ago as backyard operation.
    Now have a 1100 taps and growing. CDL hobby 250 ro.
    New for 2018, a 2.5x8 leader infurno with steamaway.

  4. #4
    Join Date
    Apr 2005
    Location
    Cayuta NY
    Posts
    751

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    There should be something in the manual about acid washing. Generally citric acid is used to drop the ph and then circulated and sometimes left to sit for a period of time. This dissolves the minerals that get caught in the membrane. A soap wash is alkaline and meant for removing biological material not mineral.
    Jeff

    470 taps
    Kinney KS-15 High Vac with Lapierre Horizontal releaser
    Leader 2x6 Patriot raised flue
    Leader 2x4 Steamaway
    Wildfire arch
    MES Dolly 300 3 post RO
    Sheets 5" Filter Press with air pump
    and still lookin to get bigger

  5. #5
    Join Date
    Jan 2006
    Location
    Oneida NY
    Posts
    8,714

    Default

    1. Do a soap wash then add clean water to wash tank.
    2. Add Acid; follow directions on ACID WASH JAR.
    3. Recirculate for 5 minutes.
    4. Stop and let set 24-48 hrs, (up to 4 weeks
    after season), do not freeze. Once acid wash is in the membranes, drain the wash tank and rinse it with water.
    5. Now do a soap wash
    6. Then do a 10 minute cold water rinse
    7. Change pre-filter.
    Dave Klish about 1320 taps in '15, down to about 700 in '16, up to 1000 for 2019?
    2012 Mahindra 36 HP 4x4/ loader/cab/heat/AC:-)
    added a gooseneck equipment trailer and F350 to tow it to haul more sap
    3x8 raised flue evaporator
    250 GPH converted to electric, RO by Ray Gingerich
    6.32 KW solar system, 1.48KW is battery backed up, all net metered
    http://s1041.photobucket.com/albums/...anssugarhouse/
    website: www.cnymaple.com

  6. #6
    Join Date
    Apr 2017
    Location
    Pittsfield, NH
    Posts
    38

    Default

    Thanks for the responses. So where do you get the acid? Is that a maple related thing or do you get it somewhere else? Sorry for the dumb Qs.
    Matras Maple

    Started 15 years ago as backyard operation.
    Now have a 1100 taps and growing. CDL hobby 250 ro.
    New for 2018, a 2.5x8 leader infurno with steamaway.

  7. #7
    Join Date
    Nov 2010
    Location
    Barnet, VT
    Posts
    2,382

    Default

    Quote Originally Posted by Asa Matras View Post
    Thanks for the responses. So where do you get the acid? Is that a maple related thing or do you get it somewhere else? Sorry for the dumb Qs.
    I buy mine on amazon. Much cheaper than maple suppliers. https://www.amazon.com/gp/aw/d/B00GN...o_pop_mb_pd_t1
    William
    900 taps plus 1400 purchased sap
    3 X 12 Thor pans on a Brian design arch
    1986 Seprotech 900 RO

  8. #8
    Join Date
    Dec 2002
    Location
    Loudon NH
    Posts
    4,954

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    I was going to reply to this thread last night but my container of citric acid is in the sugar house and I had been out in the snow too much to go out again. What Dave said is the way to do it and the closer that you can get to the 48 hours the better. Have plenty of permeate on hand to do the washes and rinses. I bought my citric acid from Bascom's.
    Russ

    "Red Roof Maples" Where the term "boiling soda" was first introduced to the maple producing world!

    Algier 2x6 evaporator, W F Mason arch
    Lapierre 125gph RO machine
    SP 22 vacuum pump
    1930 Ford Model AA Doodlebug tractor Sap Hauler

    http://s250.photobucket.com/albums/gg247/russhd1997/

  9. #9
    Join Date
    Apr 2017
    Location
    Pittsfield, NH
    Posts
    38

    Default

    Its got a 5 gal wash pail, any idea how much to put in?
    Matras Maple

    Started 15 years ago as backyard operation.
    Now have a 1100 taps and growing. CDL hobby 250 ro.
    New for 2018, a 2.5x8 leader infurno with steamaway.

  10. #10
    Join Date
    Nov 2010
    Location
    Barnet, VT
    Posts
    2,382

    Default

    Quote Originally Posted by Asa Matras View Post
    Its got a 5 gal wash pail, any idea how much to put in?
    My tank holds about 15 gallons. I put in 2 Betty Crocker frosting containers to get pH to about 2
    William
    900 taps plus 1400 purchased sap
    3 X 12 Thor pans on a Brian design arch
    1986 Seprotech 900 RO

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