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  1. #1
    Extreme Koi Member Rank = Sansai finkoi's Avatar
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    4040 membrane output?

    Hi all

    For those of you that run 4040 membranes can you tell me how much output of pure water you are getting from them per minute?

    Also what size of booster pump you are using?

    Many thanks
    Andy



  2. #2
    Hi Andy,

    How's things ?

    I've had my 4040membrane for about 8 months now. The feed comes from the house water softener via a Aquatec pump.

    At the minute with cold water (7.8°C) I'm only getting 2.3 litres per minute of good water at 11 tds and waste water of 2.14 litres per minute with a tds of 600. This is a ratio of 52/48. In summer I was getting 60/40 with 3.5 litres of good water per minute.

    I bought the pump from http://www.becktech.co.uk/, it's a DDP 550 24 VDC pump with an open flow of 2.7 GPM using 3.6 Amps @ 70 PSI. I'm sure there are better pumps today with a higher pressure and using 230 VAC. At the time it was all I could find.

    How's the recycling going? I've stopped at the minute because I have a pond tds of 114 and the Koi seem happy at this.

  3. #3
    Extreme Koi Member Rank = Sansai finkoi's Avatar
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    Hi Dave

    Nice to hear from you!

    I'm good thanks. How are you?

    That's good water production with that set up. Are you running the pump continually or on a timer to stop the pump overheating?

    I am looking at going with 4040 membranes in the future after trashing the membranes on my 1200gpd unit due to a faulty auto flush solenoid!
    I have not been running RO for a while now as I want something that is going to be more reliable than I have been using in the past.
    Priority for me at the moment is to get the filter house & pond sorted out this year and then get back into the RO again. I have plans on what I am going to do, so interesting times ahead! Also going to get back into recycling this year as I feel there is a future with this form of using RO in our ponds.

    Andy

  4. #4
    I run it on a timer Andy. At the moment I only run it for 1/2 hour a day to replace the water used by the drum During last summer it ran for a total of 3 hours a day to replace evaporation & a small water change per day.

    Plans this year are to place my Anoxic filter outdoors to increase the flow and to have a few plants so that I can feed even more

  5. #5
    Extreme Koi Member Rank = Sansai finkoi's Avatar
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    Hi Dave

    Great stuff at least you will be getting things sorted out.

    I am looking forward to running 4040 membranes this year and sorting out the filter house and installing the other set of showers.

    Are you still cleaning your membranes?

    Andy

  6. #6
    Quote Originally Posted by finkoi View Post
    Hi all

    For those of you that run 4040 membranes can you tell me how much output of pure water you are getting from them per minute?

    Also what size of booster pump you are using?

    Many thanks
    Andy
    1.62ltr/min of pure water with a TDS of 3
    0.689ltr/min of waste

  7. #7

  8. #8
    Quote Originally Posted by finkoi View Post
    Hi Dave

    Are you still cleaning your membranes?

    Andy
    Morning Andy,

    No, I've not cleaned these yet. Thinking is that since I'm only feeding clean soft water I don't need as much cleaning as with recycling. I should maybe give it a go with some hot solution

  9. #9
    Extreme Koi Member Rank = Sansai finkoi's Avatar
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    Hi Keith

    Thanks for the info on output and the pump. All food for thought.
    Looking forward to getting one of these installed.

    Hi Dave

    I think these membranes are far better than the old 150s and 300s we all used first of all.
    Good idea with the softener and it will certainly help the membranes!
    I wonder if a softener would do anything with your pond water before recycling it

    Andy

  10. #10
    Quote Originally Posted by finkoi View Post
    I wonder if a softener would do anything with your pond water before recycling it
    Andy
    Hi Andy,

    Yes, the 4040 membranes do seem much better.

    My pond is currently running with a GH of 3 and a KH of 1. I presume if I recycled through a softener it would remove all the GH & KH and I would have to buffer the KH up. Something to think about

  11. #11
    Extreme Koi Member Rank = Sansai finkoi's Avatar
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    Hi Dave

    Yes I would think you are right? I did not think about it that way. I am trying to get round the cleaning of the membranes if I was recycling water. I need to come up with something to stop biofilm build up?
    I have already cleaned membranes as you have. It may come to setting up a better cleaning process when recycling?

    Andy

  12. #12
    Quote Originally Posted by finkoi View Post
    Hi Dave

    Yes I would think you are right? I did not think about it that way. I am trying to get round the cleaning of the membranes if I was recycling water. I need to come up with something to stop biofilm build up?
    I have already cleaned membranes as you have. It may come to setting up a better cleaning process when recycling?

    Andy
    As you say Andy, some sort of cleaning rig would make it easier to clean the membranes. I have to do something with these chemicals

  13. #13
    Extreme Koi Member Rank = Supreme Champion Davej's Avatar
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    Andy

    Unpumped 1.5L a minute which is more than enough for me at this time of year.

    Dave

  14. #14
    Extreme Koi Member Rank = Sansai finkoi's Avatar
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    Hi Dave

    Thanks for that. You must have good mains pressure?

    Andy

  15. #15
    Extreme Koi Member Rank = Supreme Champion Davej's Avatar
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    Quote Originally Posted by finkoi View Post
    Hi Dave

    Thanks for that. You must have good mains pressure?

    Andy
    3 bar at the house but pond system is a run of about 70m away so feed to the RO is a rather less than this. One of the reasons I went for 4040 was that the output unpumped is generally enough for my needs. If I need a lot in a hurry then its pressure pump time, this increases output by 3.

    I would think that with a recirculating system then a regular biofilm clean routine with alkaline solution would be pretty easy to set up.

    Dave

  16. #16
    Extreme Koi Member Rank = Sansai finkoi's Avatar
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    Hi Dave

    That's good Dave. The 4040 unit is the way to go for sure!

    I am going to set up the same cleaning system I used on the 1200gpd unit that I was running. It worked very well. The alkaline solution worked great at cleaning the biofilm and there was no need to use acid. I will need to buy some more alkaline stuff though as i'm nearly out.

    Andy

  17. #17
    Quote Originally Posted by finkoi View Post
    Hi Dave

    That's good Dave. The 4040 unit is the way to go for sure!

    I am going to set up the same cleaning system I used on the 1200gpd unit that I was running. It worked very well. The alkaline solution worked great at cleaning the biofilm and there was no need to use acid. I will need to buy some more alkaline stuff though as i'm nearly out.

    Andy
    Hi Andy,
    What alkaline solution are you using?
    How long do you flush the membrane for cleaning?

  18. #18
    Extreme Koi Member Rank = Sansai finkoi's Avatar
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    Hi Keith

    Not sure about what make as It was given to me?

    I was cleaning the membrane for 1 hour at 50 psi with the RO alkaline solution heated to 30c. Then flushed for 30 mins in pure RO.

    Now need some more Alkaline solution as I have not got any left.

    There is lots of information about cleaning membranes on the internet.

    Andy

  19. #19
    Extreme Koi Member Rank = Supreme Champion Davej's Avatar
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    Keith

    I am using Acepta 2069 and 2068 one is an alkaline solution for the biofilm, the other an acid for the calcium scale.

    Dave

  20. #20
    Extreme Koi Member Rank = Sansai finkoi's Avatar
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    Hi Dave

    I think that's the same stuff Dave Collins uses.

    Did you have to buy a large drum of the Acepta 2068 and 2069?

    What is your cleaning regime?

    Andy

 

 
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